[Patch v2 1/3] dt: OF_UNITTEST make dependency broken, framework fixes

[Patch v2 1/3] dt: OF_UNITTEST make dependency broken, framework fixes

[Frank Rowand]

From: Frank Rowand <frank.rowand@sonymobile.com>

This 3 patch series is not bisectable.  If CONFIG_OF_UNITTEST=y then the kernel
will not build with just patch 1 or just patches 1 and 2 applied.

If CONFIG_OF_UNITTEST=y then a kernel image make will always cause .version to
be incremented, even if there are not source changes.  This is caused by
a lack of dependency tracking and checking for
drivers/of/unittest-data/testcases.dtb.o.  Fixing the problem was made more
complicated by the fact that testcases.dtb.o was linked into ../of_unittest.o.

Patch 1 modifies makefiles to move of_unittest.c into unittest-data/ and
creates missing dependency tracking for testcases.dtb.o.

Patch 2 will move of_unittest.c into unittest-data/

Patch 3 will fix an of_unittest.c include path to account for the move.

Signed-off-by: Frank Rowand <frank.rowand@sonymobile.com>

---

changes since version 1:

  patch 1:
  Remove some changes to scripts/Makefile.lib that are not needed.  They
  were left over from attempts to fix the problem without moving of_unitest.c
  into unittest-data/.


 drivers/of/Makefile               |    4 ++--
 drivers/of/unittest-data/Makefile |    9 +++++++++
 2 files changed, 11 insertions(+), 2 deletions(-)

Index: b/drivers/of/Makefile
===================================================================
--- a/drivers/of/Makefile
+++ b/drivers/of/Makefile
@@ -6,8 +6,6 @@ obj-$(CONFIG_OF_PROMTREE) += pdt.o
 obj-$(CONFIG_OF_ADDRESS)  += address.o
 obj-$(CONFIG_OF_IRQ)    += irq.o
 obj-$(CONFIG_OF_NET)	+= of_net.o
-obj-$(CONFIG_OF_UNITTEST) += of_unittest.o
-of_unittest-objs := unittest.o unittest-data/testcases.dtb.o
 obj-$(CONFIG_OF_MDIO)	+= of_mdio.o
 obj-$(CONFIG_OF_PCI)	+= of_pci.o
 obj-$(CONFIG_OF_PCI_IRQ)  += of_pci_irq.o
@@ -16,5 +14,7 @@ obj-$(CONFIG_OF_RESERVED_MEM) += of_rese
 obj-$(CONFIG_OF_RESOLVE)  += resolver.o
 obj-$(CONFIG_OF_OVERLAY) += overlay.o
 
+obj-$(CONFIG_OF_UNITTEST) += unittest-data/
+
 CFLAGS_fdt.o = -I$(src)/../../scripts/dtc/libfdt
 CFLAGS_fdt_address.o = -I$(src)/../../scripts/dtc/libfdt
Index: b/drivers/of/unittest-data/Makefile
===================================================================
--- /dev/null
+++ b/drivers/of/unittest-data/Makefile
@@ -0,0 +1,9 @@
+
+obj-$(CONFIG_OF_UNITTEST) += of_unittest.o
+of_unittest-objs := unittest.o testcases.dtb.o
+
+targets += testcases.dtb testcases.dtb.S
+
+.SECONDARY: \
+	$(obj)/testcases.dtb.S \
+	$(obj)/testcases.dtb

[Patch v2 2/3] dt: OF_UNITTEST make dependency broken, move unittest.c

[Frank Rowand]

From: Frank Rowand <frank.rowand-/MT0OVThwyLZJqsBc5GL+g@public.gmane.org>

Move of_unittest.c into unittest-data/

This is based on v4.0-rc3.

All checkpatch errors are ignored, as this is just a file move.  At least
two of the checkpatch errors appear to be real bugs, to be addressed in
a future patch.

Signed-off-by: Frank Rowand <frank.rowand-/MT0OVThwyLZJqsBc5GL+g@public.gmane.org>

---
 drivers/of/unittest-data/unittest.c | 1879 ++++++++++++++++++++++++++++++++++++
 drivers/of/unittest.c               | 1879 ------------------------------------
 2 files changed, 1879 insertions(+), 1879 deletions(-)

Index: b/drivers/of/unittest-data/unittest.c
===================================================================
--- /dev/null
+++ b/drivers/of/unittest-data/unittest.c
@@ -0,0 +1,1879 @@
+/*
+ * Self tests for device tree subsystem
+ */
+
+#define pr_fmt(fmt) "### dt-test ### " fmt
+
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/errno.h>
+#include <linux/hashtable.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_fdt.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/list.h>
+#include <linux/mutex.h>
+#include <linux/slab.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/of_platform.h>
+
+#include <linux/i2c.h>
+#include <linux/i2c-mux.h>
+
+#include "of_private.h"
+
+static struct selftest_results {
+	int passed;
+	int failed;
+} selftest_results;
+
+#define selftest(result, fmt, ...) ({ \
+	bool failed = !(result); \
+	if (failed) { \
+		selftest_results.failed++; \
+		pr_err("FAIL %s():%i " fmt, __func__, __LINE__, ##__VA_ARGS__); \
+	} else { \
+		selftest_results.passed++; \
+		pr_debug("pass %s():%i\n", __func__, __LINE__); \
+	} \
+	failed; \
+})
+
+static void __init of_selftest_find_node_by_name(void)
+{
+	struct device_node *np;
+	const char *options;
+
+	np = of_find_node_by_path("/testcase-data");
+	selftest(np && !strcmp("/testcase-data", np->full_name),
+		"find /testcase-data failed\n");
+	of_node_put(np);
+
+	/* Test if trailing '/' works */
+	np = of_find_node_by_path("/testcase-data/");
+	selftest(!np, "trailing '/' on /testcase-data/ should fail\n");
+
+	np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
+	selftest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", np->full_name),
+		"find /testcase-data/phandle-tests/consumer-a failed\n");
+	of_node_put(np);
+
+	np = of_find_node_by_path("testcase-alias");
+	selftest(np && !strcmp("/testcase-data", np->full_name),
+		"find testcase-alias failed\n");
+	of_node_put(np);
+
+	/* Test if trailing '/' works on aliases */
+	np = of_find_node_by_path("testcase-alias/");
+	selftest(!np, "trailing '/' on testcase-alias/ should fail\n");
+
+	np = of_find_node_by_path("testcase-alias/phandle-tests/consumer-a");
+	selftest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", np->full_name),
+		"find testcase-alias/phandle-tests/consumer-a failed\n");
+	of_node_put(np);
+
+	np = of_find_node_by_path("/testcase-data/missing-path");
+	selftest(!np, "non-existent path returned node %s\n", np->full_name);
+	of_node_put(np);
+
+	np = of_find_node_by_path("missing-alias");
+	selftest(!np, "non-existent alias returned node %s\n", np->full_name);
+	of_node_put(np);
+
+	np = of_find_node_by_path("testcase-alias/missing-path");
+	selftest(!np, "non-existent alias with relative path returned node %s\n", np->full_name);
+	of_node_put(np);
+
+	np = of_find_node_opts_by_path("/testcase-data:testoption", &options);
+	selftest(np && !strcmp("testoption", options),
+		 "option path test failed\n");
+	of_node_put(np);
+
+	np = of_find_node_opts_by_path("/testcase-data:testoption", NULL);
+	selftest(np, "NULL option path test failed\n");
+	of_node_put(np);
+
+	np = of_find_node_opts_by_path("testcase-alias:testaliasoption",
+				       &options);
+	selftest(np && !strcmp("testaliasoption", options),
+		 "option alias path test failed\n");
+	of_node_put(np);
+
+	np = of_find_node_opts_by_path("testcase-alias:testaliasoption", NULL);
+	selftest(np, "NULL option alias path test failed\n");
+	of_node_put(np);
+
+	options = "testoption";
+	np = of_find_node_opts_by_path("testcase-alias", &options);
+	selftest(np && !options, "option clearing test failed\n");
+	of_node_put(np);
+
+	options = "testoption";
+	np = of_find_node_opts_by_path("/", &options);
+	selftest(np && !options, "option clearing root node test failed\n");
+	of_node_put(np);
+}
+
+static void __init of_selftest_dynamic(void)
+{
+	struct device_node *np;
+	struct property *prop;
+
+	np = of_find_node_by_path("/testcase-data");
+	if (!np) {
+		pr_err("missing testcase data\n");
+		return;
+	}
+
+	/* Array of 4 properties for the purpose of testing */
+	prop = kzalloc(sizeof(*prop) * 4, GFP_KERNEL);
+	if (!prop) {
+		selftest(0, "kzalloc() failed\n");
+		return;
+	}
+
+	/* Add a new property - should pass*/
+	prop->name = "new-property";
+	prop->value = "new-property-data";
+	prop->length = strlen(prop->value);
+	selftest(of_add_property(np, prop) == 0, "Adding a new property failed\n");
+
+	/* Try to add an existing property - should fail */
+	prop++;
+	prop->name = "new-property";
+	prop->value = "new-property-data-should-fail";
+	prop->length = strlen(prop->value);
+	selftest(of_add_property(np, prop) != 0,
+		 "Adding an existing property should have failed\n");
+
+	/* Try to modify an existing property - should pass */
+	prop->value = "modify-property-data-should-pass";
+	prop->length = strlen(prop->value);
+	selftest(of_update_property(np, prop) == 0,
+		 "Updating an existing property should have passed\n");
+
+	/* Try to modify non-existent property - should pass*/
+	prop++;
+	prop->name = "modify-property";
+	prop->value = "modify-missing-property-data-should-pass";
+	prop->length = strlen(prop->value);
+	selftest(of_update_property(np, prop) == 0,
+		 "Updating a missing property should have passed\n");
+
+	/* Remove property - should pass */
+	selftest(of_remove_property(np, prop) == 0,
+		 "Removing a property should have passed\n");
+
+	/* Adding very large property - should pass */
+	prop++;
+	prop->name = "large-property-PAGE_SIZEx8";
+	prop->length = PAGE_SIZE * 8;
+	prop->value = kzalloc(prop->length, GFP_KERNEL);
+	selftest(prop->value != NULL, "Unable to allocate large buffer\n");
+	if (prop->value)
+		selftest(of_add_property(np, prop) == 0,
+			 "Adding a large property should have passed\n");
+}
+
+static int __init of_selftest_check_node_linkage(struct device_node *np)
+{
+	struct device_node *child;
+	int count = 0, rc;
+
+	for_each_child_of_node(np, child) {
+		if (child->parent != np) {
+			pr_err("Child node %s links to wrong parent %s\n",
+				 child->name, np->name);
+			return -EINVAL;
+		}
+
+		rc = of_selftest_check_node_linkage(child);
+		if (rc < 0)
+			return rc;
+		count += rc;
+	}
+
+	return count + 1;
+}
+
+static void __init of_selftest_check_tree_linkage(void)
+{
+	struct device_node *np;
+	int allnode_count = 0, child_count;
+
+	if (!of_root)
+		return;
+
+	for_each_of_allnodes(np)
+		allnode_count++;
+	child_count = of_selftest_check_node_linkage(of_root);
+
+	selftest(child_count > 0, "Device node data structure is corrupted\n");
+	selftest(child_count == allnode_count, "allnodes list size (%i) doesn't match"
+		 "sibling lists size (%i)\n", allnode_count, child_count);
+	pr_debug("allnodes list size (%i); sibling lists size (%i)\n", allnode_count, child_count);
+}
+
+struct node_hash {
+	struct hlist_node node;
+	struct device_node *np;
+};
+
+static DEFINE_HASHTABLE(phandle_ht, 8);
+static void __init of_selftest_check_phandles(void)
+{
+	struct device_node *np;
+	struct node_hash *nh;
+	struct hlist_node *tmp;
+	int i, dup_count = 0, phandle_count = 0;
+
+	for_each_of_allnodes(np) {
+		if (!np->phandle)
+			continue;
+
+		hash_for_each_possible(phandle_ht, nh, node, np->phandle) {
+			if (nh->np->phandle == np->phandle) {
+				pr_info("Duplicate phandle! %i used by %s and %s\n",
+					np->phandle, nh->np->full_name, np->full_name);
+				dup_count++;
+				break;
+			}
+		}
+
+		nh = kzalloc(sizeof(*nh), GFP_KERNEL);
+		if (WARN_ON(!nh))
+			return;
+
+		nh->np = np;
+		hash_add(phandle_ht, &nh->node, np->phandle);
+		phandle_count++;
+	}
+	selftest(dup_count == 0, "Found %i duplicates in %i phandles\n",
+		 dup_count, phandle_count);
+
+	/* Clean up */
+	hash_for_each_safe(phandle_ht, i, tmp, nh, node) {
+		hash_del(&nh->node);
+		kfree(nh);
+	}
+}
+
+static void __init of_selftest_parse_phandle_with_args(void)
+{
+	struct device_node *np;
+	struct of_phandle_args args;
+	int i, rc;
+
+	np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
+	if (!np) {
+		pr_err("missing testcase data\n");
+		return;
+	}
+
+	rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells");
+	selftest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc);
+
+	for (i = 0; i < 8; i++) {
+		bool passed = true;
+		rc = of_parse_phandle_with_args(np, "phandle-list",
+						"#phandle-cells", i, &args);
+
+		/* Test the values from tests-phandle.dtsi */
+		switch (i) {
+		case 0:
+			passed &= !rc;
+			passed &= (args.args_count == 1);
+			passed &= (args.args[0] == (i + 1));
+			break;
+		case 1:
+			passed &= !rc;
+			passed &= (args.args_count == 2);
+			passed &= (args.args[0] == (i + 1));
+			passed &= (args.args[1] == 0);
+			break;
+		case 2:
+			passed &= (rc == -ENOENT);
+			break;
+		case 3:
+			passed &= !rc;
+			passed &= (args.args_count == 3);
+			passed &= (args.args[0] == (i + 1));
+			passed &= (args.args[1] == 4);
+			passed &= (args.args[2] == 3);
+			break;
+		case 4:
+			passed &= !rc;
+			passed &= (args.args_count == 2);
+			passed &= (args.args[0] == (i + 1));
+			passed &= (args.args[1] == 100);
+			break;
+		case 5:
+			passed &= !rc;
+			passed &= (args.args_count == 0);
+			break;
+		case 6:
+			passed &= !rc;
+			passed &= (args.args_count == 1);
+			passed &= (args.args[0] == (i + 1));
+			break;
+		case 7:
+			passed &= (rc == -ENOENT);
+			break;
+		default:
+			passed = false;
+		}
+
+		selftest(passed, "index %i - data error on node %s rc=%i\n",
+			 i, args.np->full_name, rc);
+	}
+
+	/* Check for missing list property */
+	rc = of_parse_phandle_with_args(np, "phandle-list-missing",
+					"#phandle-cells", 0, &args);
+	selftest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
+	rc = of_count_phandle_with_args(np, "phandle-list-missing",
+					"#phandle-cells");
+	selftest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
+
+	/* Check for missing cells property */
+	rc = of_parse_phandle_with_args(np, "phandle-list",
+					"#phandle-cells-missing", 0, &args);
+	selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
+	rc = of_count_phandle_with_args(np, "phandle-list",
+					"#phandle-cells-missing");
+	selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
+
+	/* Check for bad phandle in list */
+	rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle",
+					"#phandle-cells", 0, &args);
+	selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
+	rc = of_count_phandle_with_args(np, "phandle-list-bad-phandle",
+					"#phandle-cells");
+	selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
+
+	/* Check for incorrectly formed argument list */
+	rc = of_parse_phandle_with_args(np, "phandle-list-bad-args",
+					"#phandle-cells", 1, &args);
+	selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
+	rc = of_count_phandle_with_args(np, "phandle-list-bad-args",
+					"#phandle-cells");
+	selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
+}
+
+static void __init of_selftest_property_string(void)
+{
+	const char *strings[4];
+	struct device_node *np;
+	int rc;
+
+	np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
+	if (!np) {
+		pr_err("No testcase data in device tree\n");
+		return;
+	}
+
+	rc = of_property_match_string(np, "phandle-list-names", "first");
+	selftest(rc == 0, "first expected:0 got:%i\n", rc);
+	rc = of_property_match_string(np, "phandle-list-names", "second");
+	selftest(rc == 1, "second expected:0 got:%i\n", rc);
+	rc = of_property_match_string(np, "phandle-list-names", "third");
+	selftest(rc == 2, "third expected:0 got:%i\n", rc);
+	rc = of_property_match_string(np, "phandle-list-names", "fourth");
+	selftest(rc == -ENODATA, "unmatched string; rc=%i\n", rc);
+	rc = of_property_match_string(np, "missing-property", "blah");
+	selftest(rc == -EINVAL, "missing property; rc=%i\n", rc);
+	rc = of_property_match_string(np, "empty-property", "blah");
+	selftest(rc == -ENODATA, "empty property; rc=%i\n", rc);
+	rc = of_property_match_string(np, "unterminated-string", "blah");
+	selftest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
+
+	/* of_property_count_strings() tests */
+	rc = of_property_count_strings(np, "string-property");
+	selftest(rc == 1, "Incorrect string count; rc=%i\n", rc);
+	rc = of_property_count_strings(np, "phandle-list-names");
+	selftest(rc == 3, "Incorrect string count; rc=%i\n", rc);
+	rc = of_property_count_strings(np, "unterminated-string");
+	selftest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
+	rc = of_property_count_strings(np, "unterminated-string-list");
+	selftest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
+
+	/* of_property_read_string_index() tests */
+	rc = of_property_read_string_index(np, "string-property", 0, strings);
+	selftest(rc == 0 && !strcmp(strings[0], "foobar"), "of_property_read_string_index() failure; rc=%i\n", rc);
+	strings[0] = NULL;
+	rc = of_property_read_string_index(np, "string-property", 1, strings);
+	selftest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
+	rc = of_property_read_string_index(np, "phandle-list-names", 0, strings);
+	selftest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
+	rc = of_property_read_string_index(np, "phandle-list-names", 1, strings);
+	selftest(rc == 0 && !strcmp(strings[0], "second"), "of_property_read_string_index() failure; rc=%i\n", rc);
+	rc = of_property_read_string_index(np, "phandle-list-names", 2, strings);
+	selftest(rc == 0 && !strcmp(strings[0], "third"), "of_property_read_string_index() failure; rc=%i\n", rc);
+	strings[0] = NULL;
+	rc = of_property_read_string_index(np, "phandle-list-names", 3, strings);
+	selftest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
+	strings[0] = NULL;
+	rc = of_property_read_string_index(np, "unterminated-string", 0, strings);
+	selftest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
+	rc = of_property_read_string_index(np, "unterminated-string-list", 0, strings);
+	selftest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
+	strings[0] = NULL;
+	rc = of_property_read_string_index(np, "unterminated-string-list", 2, strings); /* should fail */
+	selftest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
+	strings[1] = NULL;
+
+	/* of_property_read_string_array() tests */
+	rc = of_property_read_string_array(np, "string-property", strings, 4);
+	selftest(rc == 1, "Incorrect string count; rc=%i\n", rc);
+	rc = of_property_read_string_array(np, "phandle-list-names", strings, 4);
+	selftest(rc == 3, "Incorrect string count; rc=%i\n", rc);
+	rc = of_property_read_string_array(np, "unterminated-string", strings, 4);
+	selftest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
+	/* -- An incorrectly formed string should cause a failure */
+	rc = of_property_read_string_array(np, "unterminated-string-list", strings, 4);
+	selftest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
+	/* -- parsing the correctly formed strings should still work: */
+	strings[2] = NULL;
+	rc = of_property_read_string_array(np, "unterminated-string-list", strings, 2);
+	selftest(rc == 2 && strings[2] == NULL, "of_property_read_string_array() failure; rc=%i\n", rc);
+	strings[1] = NULL;
+	rc = of_property_read_string_array(np, "phandle-list-names", strings, 1);
+	selftest(rc == 1 && strings[1] == NULL, "Overwrote end of string array; rc=%i, str='%s'\n", rc, strings[1]);
+}
+
+#define propcmp(p1, p2) (((p1)->length == (p2)->length) && \
+			(p1)->value && (p2)->value && \
+			!memcmp((p1)->value, (p2)->value, (p1)->length) && \
+			!strcmp((p1)->name, (p2)->name))
+static void __init of_selftest_property_copy(void)
+{
+#ifdef CONFIG_OF_DYNAMIC
+	struct property p1 = { .name = "p1", .length = 0, .value = "" };
+	struct property p2 = { .name = "p2", .length = 5, .value = "abcd" };
+	struct property *new;
+
+	new = __of_prop_dup(&p1, GFP_KERNEL);
+	selftest(new && propcmp(&p1, new), "empty property didn't copy correctly\n");
+	kfree(new->value);
+	kfree(new->name);
+	kfree(new);
+
+	new = __of_prop_dup(&p2, GFP_KERNEL);
+	selftest(new && propcmp(&p2, new), "non-empty property didn't copy correctly\n");
+	kfree(new->value);
+	kfree(new->name);
+	kfree(new);
+#endif
+}
+
+static void __init of_selftest_changeset(void)
+{
+#ifdef CONFIG_OF_DYNAMIC
+	struct property *ppadd, padd = { .name = "prop-add", .length = 0, .value = "" };
+	struct property *ppupdate, pupdate = { .name = "prop-update", .length = 5, .value = "abcd" };
+	struct property *ppremove;
+	struct device_node *n1, *n2, *n21, *nremove, *parent, *np;
+	struct of_changeset chgset;
+
+	of_changeset_init(&chgset);
+	n1 = __of_node_dup(NULL, "/testcase-data/changeset/n1");
+	selftest(n1, "testcase setup failure\n");
+	n2 = __of_node_dup(NULL, "/testcase-data/changeset/n2");
+	selftest(n2, "testcase setup failure\n");
+	n21 = __of_node_dup(NULL, "%s/%s", "/testcase-data/changeset/n2", "n21");
+	selftest(n21, "testcase setup failure %p\n", n21);
+	nremove = of_find_node_by_path("/testcase-data/changeset/node-remove");
+	selftest(nremove, "testcase setup failure\n");
+	ppadd = __of_prop_dup(&padd, GFP_KERNEL);
+	selftest(ppadd, "testcase setup failure\n");
+	ppupdate = __of_prop_dup(&pupdate, GFP_KERNEL);
+	selftest(ppupdate, "testcase setup failure\n");
+	parent = nremove->parent;
+	n1->parent = parent;
+	n2->parent = parent;
+	n21->parent = n2;
+	n2->child = n21;
+	ppremove = of_find_property(parent, "prop-remove", NULL);
+	selftest(ppremove, "failed to find removal prop");
+
+	of_changeset_init(&chgset);
+	selftest(!of_changeset_attach_node(&chgset, n1), "fail attach n1\n");
+	selftest(!of_changeset_attach_node(&chgset, n2), "fail attach n2\n");
+	selftest(!of_changeset_detach_node(&chgset, nremove), "fail remove node\n");
+	selftest(!of_changeset_attach_node(&chgset, n21), "fail attach n21\n");
+	selftest(!of_changeset_add_property(&chgset, parent, ppadd), "fail add prop\n");
+	selftest(!of_changeset_update_property(&chgset, parent, ppupdate), "fail update prop\n");
+	selftest(!of_changeset_remove_property(&chgset, parent, ppremove), "fail remove prop\n");
+	mutex_lock(&of_mutex);
+	selftest(!of_changeset_apply(&chgset), "apply failed\n");
+	mutex_unlock(&of_mutex);
+
+	/* Make sure node names are constructed correctly */
+	selftest((np = of_find_node_by_path("/testcase-data/changeset/n2/n21")),
+		 "'%s' not added\n", n21->full_name);
+	of_node_put(np);
+
+	mutex_lock(&of_mutex);
+	selftest(!of_changeset_revert(&chgset), "revert failed\n");
+	mutex_unlock(&of_mutex);
+
+	of_changeset_destroy(&chgset);
+#endif
+}
+
+static void __init of_selftest_parse_interrupts(void)
+{
+	struct device_node *np;
+	struct of_phandle_args args;
+	int i, rc;
+
+	np = of_find_node_by_path("/testcase-data/interrupts/interrupts0");
+	if (!np) {
+		pr_err("missing testcase data\n");
+		return;
+	}
+
+	for (i = 0; i < 4; i++) {
+		bool passed = true;
+		args.args_count = 0;
+		rc = of_irq_parse_one(np, i, &args);
+
+		passed &= !rc;
+		passed &= (args.args_count == 1);
+		passed &= (args.args[0] == (i + 1));
+
+		selftest(passed, "index %i - data error on node %s rc=%i\n",
+			 i, args.np->full_name, rc);
+	}
+	of_node_put(np);
+
+	np = of_find_node_by_path("/testcase-data/interrupts/interrupts1");
+	if (!np) {
+		pr_err("missing testcase data\n");
+		return;
+	}
+
+	for (i = 0; i < 4; i++) {
+		bool passed = true;
+		args.args_count = 0;
+		rc = of_irq_parse_one(np, i, &args);
+
+		/* Test the values from tests-phandle.dtsi */
+		switch (i) {
+		case 0:
+			passed &= !rc;
+			passed &= (args.args_count == 1);
+			passed &= (args.args[0] == 9);
+			break;
+		case 1:
+			passed &= !rc;
+			passed &= (args.args_count == 3);
+			passed &= (args.args[0] == 10);
+			passed &= (args.args[1] == 11);
+			passed &= (args.args[2] == 12);
+			break;
+		case 2:
+			passed &= !rc;
+			passed &= (args.args_count == 2);
+			passed &= (args.args[0] == 13);
+			passed &= (args.args[1] == 14);
+			break;
+		case 3:
+			passed &= !rc;
+			passed &= (args.args_count == 2);
+			passed &= (args.args[0] == 15);
+			passed &= (args.args[1] == 16);
+			break;
+		default:
+			passed = false;
+		}
+		selftest(passed, "index %i - data error on node %s rc=%i\n",
+			 i, args.np->full_name, rc);
+	}
+	of_node_put(np);
+}
+
+static void __init of_selftest_parse_interrupts_extended(void)
+{
+	struct device_node *np;
+	struct of_phandle_args args;
+	int i, rc;
+
+	np = of_find_node_by_path("/testcase-data/interrupts/interrupts-extended0");
+	if (!np) {
+		pr_err("missing testcase data\n");
+		return;
+	}
+
+	for (i = 0; i < 7; i++) {
+		bool passed = true;
+		rc = of_irq_parse_one(np, i, &args);
+
+		/* Test the values from tests-phandle.dtsi */
+		switch (i) {
+		case 0:
+			passed &= !rc;
+			passed &= (args.args_count == 1);
+			passed &= (args.args[0] == 1);
+			break;
+		case 1:
+			passed &= !rc;
+			passed &= (args.args_count == 3);
+			passed &= (args.args[0] == 2);
+			passed &= (args.args[1] == 3);
+			passed &= (args.args[2] == 4);
+			break;
+		case 2:
+			passed &= !rc;
+			passed &= (args.args_count == 2);
+			passed &= (args.args[0] == 5);
+			passed &= (args.args[1] == 6);
+			break;
+		case 3:
+			passed &= !rc;
+			passed &= (args.args_count == 1);
+			passed &= (args.args[0] == 9);
+			break;
+		case 4:
+			passed &= !rc;
+			passed &= (args.args_count == 3);
+			passed &= (args.args[0] == 10);
+			passed &= (args.args[1] == 11);
+			passed &= (args.args[2] == 12);
+			break;
+		case 5:
+			passed &= !rc;
+			passed &= (args.args_count == 2);
+			passed &= (args.args[0] == 13);
+			passed &= (args.args[1] == 14);
+			break;
+		case 6:
+			passed &= !rc;
+			passed &= (args.args_count == 1);
+			passed &= (args.args[0] == 15);
+			break;
+		default:
+			passed = false;
+		}
+
+		selftest(passed, "index %i - data error on node %s rc=%i\n",
+			 i, args.np->full_name, rc);
+	}
+	of_node_put(np);
+}
+
+static struct of_device_id match_node_table[] = {
+	{ .data = "A", .name = "name0", }, /* Name alone is lowest priority */
+	{ .data = "B", .type = "type1", }, /* followed by type alone */
+
+	{ .data = "Ca", .name = "name2", .type = "type1", }, /* followed by both together */
+	{ .data = "Cb", .name = "name2", }, /* Only match when type doesn't match */
+	{ .data = "Cc", .name = "name2", .type = "type2", },
+
+	{ .data = "E", .compatible = "compat3" },
+	{ .data = "G", .compatible = "compat2", },
+	{ .data = "H", .compatible = "compat2", .name = "name5", },
+	{ .data = "I", .compatible = "compat2", .type = "type1", },
+	{ .data = "J", .compatible = "compat2", .type = "type1", .name = "name8", },
+	{ .data = "K", .compatible = "compat2", .name = "name9", },
+	{}
+};
+
+static struct {
+	const char *path;
+	const char *data;
+} match_node_tests[] = {
+	{ .path = "/testcase-data/match-node/name0", .data = "A", },
+	{ .path = "/testcase-data/match-node/name1", .data = "B", },
+	{ .path = "/testcase-data/match-node/a/name2", .data = "Ca", },
+	{ .path = "/testcase-data/match-node/b/name2", .data = "Cb", },
+	{ .path = "/testcase-data/match-node/c/name2", .data = "Cc", },
+	{ .path = "/testcase-data/match-node/name3", .data = "E", },
+	{ .path = "/testcase-data/match-node/name4", .data = "G", },
+	{ .path = "/testcase-data/match-node/name5", .data = "H", },
+	{ .path = "/testcase-data/match-node/name6", .data = "G", },
+	{ .path = "/testcase-data/match-node/name7", .data = "I", },
+	{ .path = "/testcase-data/match-node/name8", .data = "J", },
+	{ .path = "/testcase-data/match-node/name9", .data = "K", },
+};
+
+static void __init of_selftest_match_node(void)
+{
+	struct device_node *np;
+	const struct of_device_id *match;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(match_node_tests); i++) {
+		np = of_find_node_by_path(match_node_tests[i].path);
+		if (!np) {
+			selftest(0, "missing testcase node %s\n",
+				match_node_tests[i].path);
+			continue;
+		}
+
+		match = of_match_node(match_node_table, np);
+		if (!match) {
+			selftest(0, "%s didn't match anything\n",
+				match_node_tests[i].path);
+			continue;
+		}
+
+		if (strcmp(match->data, match_node_tests[i].data) != 0) {
+			selftest(0, "%s got wrong match. expected %s, got %s\n",
+				match_node_tests[i].path, match_node_tests[i].data,
+				(const char *)match->data);
+			continue;
+		}
+		selftest(1, "passed");
+	}
+}
+
+struct device test_bus = {
+	.init_name = "unittest-bus",
+};
+static void __init of_selftest_platform_populate(void)
+{
+	int irq, rc;
+	struct device_node *np, *child, *grandchild;
+	struct platform_device *pdev;
+	struct of_device_id match[] = {
+		{ .compatible = "test-device", },
+		{}
+	};
+
+	np = of_find_node_by_path("/testcase-data");
+	of_platform_populate(np, of_default_bus_match_table, NULL, NULL);
+
+	/* Test that a missing irq domain returns -EPROBE_DEFER */
+	np = of_find_node_by_path("/testcase-data/testcase-device1");
+	pdev = of_find_device_by_node(np);
+	selftest(pdev, "device 1 creation failed\n");
+
+	irq = platform_get_irq(pdev, 0);
+	selftest(irq == -EPROBE_DEFER, "device deferred probe failed - %d\n", irq);
+
+	/* Test that a parsing failure does not return -EPROBE_DEFER */
+	np = of_find_node_by_path("/testcase-data/testcase-device2");
+	pdev = of_find_device_by_node(np);
+	selftest(pdev, "device 2 creation failed\n");
+	irq = platform_get_irq(pdev, 0);
+	selftest(irq < 0 && irq != -EPROBE_DEFER, "device parsing error failed - %d\n", irq);
+
+	if (selftest(np = of_find_node_by_path("/testcase-data/platform-tests"),
+		     "No testcase data in device tree\n"));
+		return;
+
+	if (selftest(!(rc = device_register(&test_bus)),
+		     "testbus registration failed; rc=%i\n", rc));
+		return;
+
+	for_each_child_of_node(np, child) {
+		of_platform_populate(child, match, NULL, &test_bus);
+		for_each_child_of_node(child, grandchild)
+			selftest(of_find_device_by_node(grandchild),
+				 "Could not create device for node '%s'\n",
+				 grandchild->name);
+	}
+
+	of_platform_depopulate(&test_bus);
+	for_each_child_of_node(np, child) {
+		for_each_child_of_node(child, grandchild)
+			selftest(!of_find_device_by_node(grandchild),
+				 "device didn't get destroyed '%s'\n",
+				 grandchild->name);
+	}
+
+	device_unregister(&test_bus);
+	of_node_put(np);
+}
+
+/**
+ *	update_node_properties - adds the properties
+ *	of np into dup node (present in live tree) and
+ *	updates parent of children of np to dup.
+ *
+ *	@np:	node already present in live tree
+ *	@dup:	node present in live tree to be updated
+ */
+static void update_node_properties(struct device_node *np,
+					struct device_node *dup)
+{
+	struct property *prop;
+	struct device_node *child;
+
+	for_each_property_of_node(np, prop)
+		of_add_property(dup, prop);
+
+	for_each_child_of_node(np, child)
+		child->parent = dup;
+}
+
+/**
+ *	attach_node_and_children - attaches nodes
+ *	and its children to live tree
+ *
+ *	@np:	Node to attach to live tree
+ */
+static int attach_node_and_children(struct device_node *np)
+{
+	struct device_node *next, *dup, *child;
+	unsigned long flags;
+
+	dup = of_find_node_by_path(np->full_name);
+	if (dup) {
+		update_node_properties(np, dup);
+		return 0;
+	}
+
+	child = np->child;
+	np->child = NULL;
+
+	mutex_lock(&of_mutex);
+	raw_spin_lock_irqsave(&devtree_lock, flags);
+	np->sibling = np->parent->child;
+	np->parent->child = np;
+	of_node_clear_flag(np, OF_DETACHED);
+	raw_spin_unlock_irqrestore(&devtree_lock, flags);
+
+	__of_attach_node_sysfs(np);
+	mutex_unlock(&of_mutex);
+
+	while (child) {
+		next = child->sibling;
+		attach_node_and_children(child);
+		child = next;
+	}
+
+	return 0;
+}
+
+/**
+ *	selftest_data_add - Reads, copies data from
+ *	linked tree and attaches it to the live tree
+ */
+static int __init selftest_data_add(void)
+{
+	void *selftest_data;
+	struct device_node *selftest_data_node, *np;
+	extern uint8_t __dtb_testcases_begin[];
+	extern uint8_t __dtb_testcases_end[];
+	const int size = __dtb_testcases_end - __dtb_testcases_begin;
+	int rc;
+
+	if (!size) {
+		pr_warn("%s: No testcase data to attach; not running tests\n",
+			__func__);
+		return -ENODATA;
+	}
+
+	/* creating copy */
+	selftest_data = kmemdup(__dtb_testcases_begin, size, GFP_KERNEL);
+
+	if (!selftest_data) {
+		pr_warn("%s: Failed to allocate memory for selftest_data; "
+			"not running tests\n", __func__);
+		return -ENOMEM;
+	}
+	of_fdt_unflatten_tree(selftest_data, &selftest_data_node);
+	if (!selftest_data_node) {
+		pr_warn("%s: No tree to attach; not running tests\n", __func__);
+		return -ENODATA;
+	}
+	of_node_set_flag(selftest_data_node, OF_DETACHED);
+	rc = of_resolve_phandles(selftest_data_node);
+	if (rc) {
+		pr_err("%s: Failed to resolve phandles (rc=%i)\n", __func__, rc);
+		return -EINVAL;
+	}
+
+	if (!of_root) {
+		of_root = selftest_data_node;
+		for_each_of_allnodes(np)
+			__of_attach_node_sysfs(np);
+		of_aliases = of_find_node_by_path("/aliases");
+		of_chosen = of_find_node_by_path("/chosen");
+		return 0;
+	}
+
+	/* attach the sub-tree to live tree */
+	np = selftest_data_node->child;
+	while (np) {
+		struct device_node *next = np->sibling;
+		np->parent = of_root;
+		attach_node_and_children(np);
+		np = next;
+	}
+	return 0;
+}
+
+#ifdef CONFIG_OF_OVERLAY
+
+static int selftest_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+
+	if (np == NULL) {
+		dev_err(dev, "No OF data for device\n");
+		return -EINVAL;
+
+	}
+
+	dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
+
+	of_platform_populate(np, NULL, NULL, &pdev->dev);
+
+	return 0;
+}
+
+static int selftest_remove(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+
+	dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
+	return 0;
+}
+
+static struct of_device_id selftest_match[] = {
+	{ .compatible = "selftest", },
+	{},
+};
+
+static struct platform_driver selftest_driver = {
+	.probe			= selftest_probe,
+	.remove			= selftest_remove,
+	.driver = {
+		.name		= "selftest",
+		.owner		= THIS_MODULE,
+		.of_match_table	= of_match_ptr(selftest_match),
+	},
+};
+
+/* get the platform device instantiated at the path */
+static struct platform_device *of_path_to_platform_device(const char *path)
+{
+	struct device_node *np;
+	struct platform_device *pdev;
+
+	np = of_find_node_by_path(path);
+	if (np == NULL)
+		return NULL;
+
+	pdev = of_find_device_by_node(np);
+	of_node_put(np);
+
+	return pdev;
+}
+
+/* find out if a platform device exists at that path */
+static int of_path_platform_device_exists(const char *path)
+{
+	struct platform_device *pdev;
+
+	pdev = of_path_to_platform_device(path);
+	platform_device_put(pdev);
+	return pdev != NULL;
+}
+
+#if IS_ENABLED(CONFIG_I2C)
+
+/* get the i2c client device instantiated at the path */
+static struct i2c_client *of_path_to_i2c_client(const char *path)
+{
+	struct device_node *np;
+	struct i2c_client *client;
+
+	np = of_find_node_by_path(path);
+	if (np == NULL)
+		return NULL;
+
+	client = of_find_i2c_device_by_node(np);
+	of_node_put(np);
+
+	return client;
+}
+
+/* find out if a i2c client device exists at that path */
+static int of_path_i2c_client_exists(const char *path)
+{
+	struct i2c_client *client;
+
+	client = of_path_to_i2c_client(path);
+	if (client)
+		put_device(&client->dev);
+	return client != NULL;
+}
+#else
+static int of_path_i2c_client_exists(const char *path)
+{
+	return 0;
+}
+#endif
+
+enum overlay_type {
+	PDEV_OVERLAY,
+	I2C_OVERLAY
+};
+
+static int of_path_device_type_exists(const char *path,
+		enum overlay_type ovtype)
+{
+	switch (ovtype) {
+	case PDEV_OVERLAY:
+		return of_path_platform_device_exists(path);
+	case I2C_OVERLAY:
+		return of_path_i2c_client_exists(path);
+	}
+	return 0;
+}
+
+static const char *selftest_path(int nr, enum overlay_type ovtype)
+{
+	const char *base;
+	static char buf[256];
+
+	switch (ovtype) {
+	case PDEV_OVERLAY:
+		base = "/testcase-data/overlay-node/test-bus";
+		break;
+	case I2C_OVERLAY:
+		base = "/testcase-data/overlay-node/test-bus/i2c-test-bus";
+		break;
+	default:
+		buf[0] = '\0';
+		return buf;
+	}
+	snprintf(buf, sizeof(buf) - 1, "%s/test-selftest%d", base, nr);
+	buf[sizeof(buf) - 1] = '\0';
+	return buf;
+}
+
+static int of_selftest_device_exists(int selftest_nr, enum overlay_type ovtype)
+{
+	const char *path;
+
+	path = selftest_path(selftest_nr, ovtype);
+
+	switch (ovtype) {
+	case PDEV_OVERLAY:
+		return of_path_platform_device_exists(path);
+	case I2C_OVERLAY:
+		return of_path_i2c_client_exists(path);
+	}
+	return 0;
+}
+
+static const char *overlay_path(int nr)
+{
+	static char buf[256];
+
+	snprintf(buf, sizeof(buf) - 1,
+		"/testcase-data/overlay%d", nr);
+	buf[sizeof(buf) - 1] = '\0';
+
+	return buf;
+}
+
+static const char *bus_path = "/testcase-data/overlay-node/test-bus";
+
+static int of_selftest_apply_overlay(int selftest_nr, int overlay_nr,
+		int *overlay_id)
+{
+	struct device_node *np = NULL;
+	int ret, id = -1;
+
+	np = of_find_node_by_path(overlay_path(overlay_nr));
+	if (np == NULL) {
+		selftest(0, "could not find overlay node @\"%s\"\n",
+				overlay_path(overlay_nr));
+		ret = -EINVAL;
+		goto out;
+	}
+
+	ret = of_overlay_create(np);
+	if (ret < 0) {
+		selftest(0, "could not create overlay from \"%s\"\n",
+				overlay_path(overlay_nr));
+		goto out;
+	}
+	id = ret;
+
+	ret = 0;
+
+out:
+	of_node_put(np);
+
+	if (overlay_id)
+		*overlay_id = id;
+
+	return ret;
+}
+
+/* apply an overlay while checking before and after states */
+static int of_selftest_apply_overlay_check(int overlay_nr, int selftest_nr,
+		int before, int after, enum overlay_type ovtype)
+{
+	int ret;
+
+	/* selftest device must not be in before state */
+	if (of_selftest_device_exists(selftest_nr, ovtype) != before) {
+		selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
+				overlay_path(overlay_nr),
+				selftest_path(selftest_nr, ovtype),
+				!before ? "enabled" : "disabled");
+		return -EINVAL;
+	}
+
+	ret = of_selftest_apply_overlay(overlay_nr, selftest_nr, NULL);
+	if (ret != 0) {
+		/* of_selftest_apply_overlay already called selftest() */
+		return ret;
+	}
+
+	/* selftest device must be to set to after state */
+	if (of_selftest_device_exists(selftest_nr, ovtype) != after) {
+		selftest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n",
+				overlay_path(overlay_nr),
+				selftest_path(selftest_nr, ovtype),
+				!after ? "enabled" : "disabled");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+/* apply an overlay and then revert it while checking before, after states */
+static int of_selftest_apply_revert_overlay_check(int overlay_nr,
+		int selftest_nr, int before, int after,
+		enum overlay_type ovtype)
+{
+	int ret, ov_id;
+
+	/* selftest device must be in before state */
+	if (of_selftest_device_exists(selftest_nr, ovtype) != before) {
+		selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
+				overlay_path(overlay_nr),
+				selftest_path(selftest_nr, ovtype),
+				!before ? "enabled" : "disabled");
+		return -EINVAL;
+	}
+
+	/* apply the overlay */
+	ret = of_selftest_apply_overlay(overlay_nr, selftest_nr, &ov_id);
+	if (ret != 0) {
+		/* of_selftest_apply_overlay already called selftest() */
+		return ret;
+	}
+
+	/* selftest device must be in after state */
+	if (of_selftest_device_exists(selftest_nr, ovtype) != after) {
+		selftest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n",
+				overlay_path(overlay_nr),
+				selftest_path(selftest_nr, ovtype),
+				!after ? "enabled" : "disabled");
+		return -EINVAL;
+	}
+
+	ret = of_overlay_destroy(ov_id);
+	if (ret != 0) {
+		selftest(0, "overlay @\"%s\" failed to be destroyed @\"%s\"\n",
+				overlay_path(overlay_nr),
+				selftest_path(selftest_nr, ovtype));
+		return ret;
+	}
+
+	/* selftest device must be again in before state */
+	if (of_selftest_device_exists(selftest_nr, PDEV_OVERLAY) != before) {
+		selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
+				overlay_path(overlay_nr),
+				selftest_path(selftest_nr, ovtype),
+				!before ? "enabled" : "disabled");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+/* test activation of device */
+static void of_selftest_overlay_0(void)
+{
+	int ret;
+
+	/* device should enable */
+	ret = of_selftest_apply_overlay_check(0, 0, 0, 1, PDEV_OVERLAY);
+	if (ret != 0)
+		return;
+
+	selftest(1, "overlay test %d passed\n", 0);
+}
+
+/* test deactivation of device */
+static void of_selftest_overlay_1(void)
+{
+	int ret;
+
+	/* device should disable */
+	ret = of_selftest_apply_overlay_check(1, 1, 1, 0, PDEV_OVERLAY);
+	if (ret != 0)
+		return;
+
+	selftest(1, "overlay test %d passed\n", 1);
+}
+
+/* test activation of device */
+static void of_selftest_overlay_2(void)
+{
+	int ret;
+
+	/* device should enable */
+	ret = of_selftest_apply_overlay_check(2, 2, 0, 1, PDEV_OVERLAY);
+	if (ret != 0)
+		return;
+
+	selftest(1, "overlay test %d passed\n", 2);
+}
+
+/* test deactivation of device */
+static void of_selftest_overlay_3(void)
+{
+	int ret;
+
+	/* device should disable */
+	ret = of_selftest_apply_overlay_check(3, 3, 1, 0, PDEV_OVERLAY);
+	if (ret != 0)
+		return;
+
+	selftest(1, "overlay test %d passed\n", 3);
+}
+
+/* test activation of a full device node */
+static void of_selftest_overlay_4(void)
+{
+	int ret;
+
+	/* device should disable */
+	ret = of_selftest_apply_overlay_check(4, 4, 0, 1, PDEV_OVERLAY);
+	if (ret != 0)
+		return;
+
+	selftest(1, "overlay test %d passed\n", 4);
+}
+
+/* test overlay apply/revert sequence */
+static void of_selftest_overlay_5(void)
+{
+	int ret;
+
+	/* device should disable */
+	ret = of_selftest_apply_revert_overlay_check(5, 5, 0, 1, PDEV_OVERLAY);
+	if (ret != 0)
+		return;
+
+	selftest(1, "overlay test %d passed\n", 5);
+}
+
+/* test overlay application in sequence */
+static void of_selftest_overlay_6(void)
+{
+	struct device_node *np;
+	int ret, i, ov_id[2];
+	int overlay_nr = 6, selftest_nr = 6;
+	int before = 0, after = 1;
+
+	/* selftest device must be in before state */
+	for (i = 0; i < 2; i++) {
+		if (of_selftest_device_exists(selftest_nr + i, PDEV_OVERLAY)
+				!= before) {
+			selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
+					overlay_path(overlay_nr + i),
+					selftest_path(selftest_nr + i,
+						PDEV_OVERLAY),
+					!before ? "enabled" : "disabled");
+			return;
+		}
+	}
+
+	/* apply the overlays */
+	for (i = 0; i < 2; i++) {
+
+		np = of_find_node_by_path(overlay_path(overlay_nr + i));
+		if (np == NULL) {
+			selftest(0, "could not find overlay node @\"%s\"\n",
+					overlay_path(overlay_nr + i));
+			return;
+		}
+
+		ret = of_overlay_create(np);
+		if (ret < 0)  {
+			selftest(0, "could not create overlay from \"%s\"\n",
+					overlay_path(overlay_nr + i));
+			return;
+		}
+		ov_id[i] = ret;
+	}
+
+	for (i = 0; i < 2; i++) {
+		/* selftest device must be in after state */
+		if (of_selftest_device_exists(selftest_nr + i, PDEV_OVERLAY)
+				!= after) {
+			selftest(0, "overlay @\"%s\" failed @\"%s\" %s\n",
+					overlay_path(overlay_nr + i),
+					selftest_path(selftest_nr + i,
+						PDEV_OVERLAY),
+					!after ? "enabled" : "disabled");
+			return;
+		}
+	}
+
+	for (i = 1; i >= 0; i--) {
+		ret = of_overlay_destroy(ov_id[i]);
+		if (ret != 0) {
+			selftest(0, "overlay @\"%s\" failed destroy @\"%s\"\n",
+					overlay_path(overlay_nr + i),
+					selftest_path(selftest_nr + i,
+						PDEV_OVERLAY));
+			return;
+		}
+	}
+
+	for (i = 0; i < 2; i++) {
+		/* selftest device must be again in before state */
+		if (of_selftest_device_exists(selftest_nr + i, PDEV_OVERLAY)
+				!= before) {
+			selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
+					overlay_path(overlay_nr + i),
+					selftest_path(selftest_nr + i,
+						PDEV_OVERLAY),
+					!before ? "enabled" : "disabled");
+			return;
+		}
+	}
+
+	selftest(1, "overlay test %d passed\n", 6);
+}
+
+/* test overlay application in sequence */
+static void of_selftest_overlay_8(void)
+{
+	struct device_node *np;
+	int ret, i, ov_id[2];
+	int overlay_nr = 8, selftest_nr = 8;
+
+	/* we don't care about device state in this test */
+
+	/* apply the overlays */
+	for (i = 0; i < 2; i++) {
+
+		np = of_find_node_by_path(overlay_path(overlay_nr + i));
+		if (np == NULL) {
+			selftest(0, "could not find overlay node @\"%s\"\n",
+					overlay_path(overlay_nr + i));
+			return;
+		}
+
+		ret = of_overlay_create(np);
+		if (ret < 0)  {
+			selftest(0, "could not create overlay from \"%s\"\n",
+					overlay_path(overlay_nr + i));
+			return;
+		}
+		ov_id[i] = ret;
+	}
+
+	/* now try to remove first overlay (it should fail) */
+	ret = of_overlay_destroy(ov_id[0]);
+	if (ret == 0) {
+		selftest(0, "overlay @\"%s\" was destroyed @\"%s\"\n",
+				overlay_path(overlay_nr + 0),
+				selftest_path(selftest_nr,
+					PDEV_OVERLAY));
+		return;
+	}
+
+	/* removing them in order should work */
+	for (i = 1; i >= 0; i--) {
+		ret = of_overlay_destroy(ov_id[i]);
+		if (ret != 0) {
+			selftest(0, "overlay @\"%s\" not destroyed @\"%s\"\n",
+					overlay_path(overlay_nr + i),
+					selftest_path(selftest_nr,
+						PDEV_OVERLAY));
+			return;
+		}
+	}
+
+	selftest(1, "overlay test %d passed\n", 8);
+}
+
+/* test insertion of a bus with parent devices */
+static void of_selftest_overlay_10(void)
+{
+	int ret;
+	char *child_path;
+
+	/* device should disable */
+	ret = of_selftest_apply_overlay_check(10, 10, 0, 1, PDEV_OVERLAY);
+	if (selftest(ret == 0,
+			"overlay test %d failed; overlay application\n", 10))
+		return;
+
+	child_path = kasprintf(GFP_KERNEL, "%s/test-selftest101",
+			selftest_path(10, PDEV_OVERLAY));
+	if (selftest(child_path, "overlay test %d failed; kasprintf\n", 10))
+		return;
+
+	ret = of_path_device_type_exists(child_path, PDEV_OVERLAY);
+	kfree(child_path);
+	if (selftest(ret, "overlay test %d failed; no child device\n", 10))
+		return;
+}
+
+/* test insertion of a bus with parent devices (and revert) */
+static void of_selftest_overlay_11(void)
+{
+	int ret;
+
+	/* device should disable */
+	ret = of_selftest_apply_revert_overlay_check(11, 11, 0, 1,
+			PDEV_OVERLAY);
+	if (selftest(ret == 0,
+			"overlay test %d failed; overlay application\n", 11))
+		return;
+}
+
+#if IS_ENABLED(CONFIG_I2C) && IS_ENABLED(CONFIG_OF_OVERLAY)
+
+struct selftest_i2c_bus_data {
+	struct platform_device	*pdev;
+	struct i2c_adapter	adap;
+};
+
+static int selftest_i2c_master_xfer(struct i2c_adapter *adap,
+		struct i2c_msg *msgs, int num)
+{
+	struct selftest_i2c_bus_data *std = i2c_get_adapdata(adap);
+
+	(void)std;
+
+	return num;
+}
+
+static u32 selftest_i2c_functionality(struct i2c_adapter *adap)
+{
+	return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
+}
+
+static const struct i2c_algorithm selftest_i2c_algo = {
+	.master_xfer	= selftest_i2c_master_xfer,
+	.functionality	= selftest_i2c_functionality,
+};
+
+static int selftest_i2c_bus_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+	struct selftest_i2c_bus_data *std;
+	struct i2c_adapter *adap;
+	int ret;
+
+	if (np == NULL) {
+		dev_err(dev, "No OF data for device\n");
+		return -EINVAL;
+
+	}
+
+	dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
+
+	std = devm_kzalloc(dev, sizeof(*std), GFP_KERNEL);
+	if (!std) {
+		dev_err(dev, "Failed to allocate selftest i2c data\n");
+		return -ENOMEM;
+	}
+
+	/* link them together */
+	std->pdev = pdev;
+	platform_set_drvdata(pdev, std);
+
+	adap = &std->adap;
+	i2c_set_adapdata(adap, std);
+	adap->nr = -1;
+	strlcpy(adap->name, pdev->name, sizeof(adap->name));
+	adap->class = I2C_CLASS_DEPRECATED;
+	adap->algo = &selftest_i2c_algo;
+	adap->dev.parent = dev;
+	adap->dev.of_node = dev->of_node;
+	adap->timeout = 5 * HZ;
+	adap->retries = 3;
+
+	ret = i2c_add_numbered_adapter(adap);
+	if (ret != 0) {
+		dev_err(dev, "Failed to add I2C adapter\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static int selftest_i2c_bus_remove(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+	struct selftest_i2c_bus_data *std = platform_get_drvdata(pdev);
+
+	dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
+	i2c_del_adapter(&std->adap);
+
+	return 0;
+}
+
+static struct of_device_id selftest_i2c_bus_match[] = {
+	{ .compatible = "selftest-i2c-bus", },
+	{},
+};
+
+static struct platform_driver selftest_i2c_bus_driver = {
+	.probe			= selftest_i2c_bus_probe,
+	.remove			= selftest_i2c_bus_remove,
+	.driver = {
+		.name		= "selftest-i2c-bus",
+		.of_match_table	= of_match_ptr(selftest_i2c_bus_match),
+	},
+};
+
+static int selftest_i2c_dev_probe(struct i2c_client *client,
+		const struct i2c_device_id *id)
+{
+	struct device *dev = &client->dev;
+	struct device_node *np = client->dev.of_node;
+
+	if (!np) {
+		dev_err(dev, "No OF node\n");
+		return -EINVAL;
+	}
+
+	dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
+
+	return 0;
+};
+
+static int selftest_i2c_dev_remove(struct i2c_client *client)
+{
+	struct device *dev = &client->dev;
+	struct device_node *np = client->dev.of_node;
+
+	dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
+	return 0;
+}
+
+static const struct i2c_device_id selftest_i2c_dev_id[] = {
+	{ .name = "selftest-i2c-dev" },
+	{ }
+};
+
+static struct i2c_driver selftest_i2c_dev_driver = {
+	.driver = {
+		.name = "selftest-i2c-dev",
+		.owner = THIS_MODULE,
+	},
+	.probe = selftest_i2c_dev_probe,
+	.remove = selftest_i2c_dev_remove,
+	.id_table = selftest_i2c_dev_id,
+};
+
+#if IS_ENABLED(CONFIG_I2C_MUX)
+
+struct selftest_i2c_mux_data {
+	int nchans;
+	struct i2c_adapter *adap[];
+};
+
+static int selftest_i2c_mux_select_chan(struct i2c_adapter *adap,
+			       void *client, u32 chan)
+{
+	return 0;
+}
+
+static int selftest_i2c_mux_probe(struct i2c_client *client,
+		const struct i2c_device_id *id)
+{
+	int ret, i, nchans, size;
+	struct device *dev = &client->dev;
+	struct i2c_adapter *adap = to_i2c_adapter(dev->parent);
+	struct device_node *np = client->dev.of_node, *child;
+	struct selftest_i2c_mux_data *stm;
+	u32 reg, max_reg;
+
+	dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
+
+	if (!np) {
+		dev_err(dev, "No OF node\n");
+		return -EINVAL;
+	}
+
+	max_reg = (u32)-1;
+	for_each_child_of_node(np, child) {
+		ret = of_property_read_u32(child, "reg", &reg);
+		if (ret)
+			continue;
+		if (max_reg == (u32)-1 || reg > max_reg)
+			max_reg = reg;
+	}
+	nchans = max_reg == (u32)-1 ? 0 : max_reg + 1;
+	if (nchans == 0) {
+		dev_err(dev, "No channels\n");
+		return -EINVAL;
+	}
+
+	size = offsetof(struct selftest_i2c_mux_data, adap[nchans]);
+	stm = devm_kzalloc(dev, size, GFP_KERNEL);
+	if (!stm) {
+		dev_err(dev, "Out of memory\n");
+		return -ENOMEM;
+	}
+	stm->nchans = nchans;
+	for (i = 0; i < nchans; i++) {
+		stm->adap[i] = i2c_add_mux_adapter(adap, dev, client,
+				0, i, 0, selftest_i2c_mux_select_chan, NULL);
+		if (!stm->adap[i]) {
+			dev_err(dev, "Failed to register mux #%d\n", i);
+			for (i--; i >= 0; i--)
+				i2c_del_mux_adapter(stm->adap[i]);
+			return -ENODEV;
+		}
+	}
+
+	i2c_set_clientdata(client, stm);
+
+	return 0;
+};
+
+static int selftest_i2c_mux_remove(struct i2c_client *client)
+{
+	struct device *dev = &client->dev;
+	struct device_node *np = client->dev.of_node;
+	struct selftest_i2c_mux_data *stm = i2c_get_clientdata(client);
+	int i;
+
+	dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
+	for (i = stm->nchans - 1; i >= 0; i--)
+		i2c_del_mux_adapter(stm->adap[i]);
+	return 0;
+}
+
+static const struct i2c_device_id selftest_i2c_mux_id[] = {
+	{ .name = "selftest-i2c-mux" },
+	{ }
+};
+
+static struct i2c_driver selftest_i2c_mux_driver = {
+	.driver = {
+		.name = "selftest-i2c-mux",
+		.owner = THIS_MODULE,
+	},
+	.probe = selftest_i2c_mux_probe,
+	.remove = selftest_i2c_mux_remove,
+	.id_table = selftest_i2c_mux_id,
+};
+
+#endif
+
+static int of_selftest_overlay_i2c_init(void)
+{
+	int ret;
+
+	ret = i2c_add_driver(&selftest_i2c_dev_driver);
+	if (selftest(ret == 0,
+			"could not register selftest i2c device driver\n"))
+		return ret;
+
+	ret = platform_driver_register(&selftest_i2c_bus_driver);
+	if (selftest(ret == 0,
+			"could not register selftest i2c bus driver\n"))
+		return ret;
+
+#if IS_ENABLED(CONFIG_I2C_MUX)
+	ret = i2c_add_driver(&selftest_i2c_mux_driver);
+	if (selftest(ret == 0,
+			"could not register selftest i2c mux driver\n"))
+		return ret;
+#endif
+
+	return 0;
+}
+
+static void of_selftest_overlay_i2c_cleanup(void)
+{
+#if IS_ENABLED(CONFIG_I2C_MUX)
+	i2c_del_driver(&selftest_i2c_mux_driver);
+#endif
+	platform_driver_unregister(&selftest_i2c_bus_driver);
+	i2c_del_driver(&selftest_i2c_dev_driver);
+}
+
+static void of_selftest_overlay_i2c_12(void)
+{
+	int ret;
+
+	/* device should enable */
+	ret = of_selftest_apply_overlay_check(12, 12, 0, 1, I2C_OVERLAY);
+	if (ret != 0)
+		return;
+
+	selftest(1, "overlay test %d passed\n", 12);
+}
+
+/* test deactivation of device */
+static void of_selftest_overlay_i2c_13(void)
+{
+	int ret;
+
+	/* device should disable */
+	ret = of_selftest_apply_overlay_check(13, 13, 1, 0, I2C_OVERLAY);
+	if (ret != 0)
+		return;
+
+	selftest(1, "overlay test %d passed\n", 13);
+}
+
+/* just check for i2c mux existence */
+static void of_selftest_overlay_i2c_14(void)
+{
+}
+
+static void of_selftest_overlay_i2c_15(void)
+{
+	int ret;
+
+	/* device should enable */
+	ret = of_selftest_apply_overlay_check(16, 15, 0, 1, I2C_OVERLAY);
+	if (ret != 0)
+		return;
+
+	selftest(1, "overlay test %d passed\n", 15);
+}
+
+#else
+
+static inline void of_selftest_overlay_i2c_14(void) { }
+static inline void of_selftest_overlay_i2c_15(void) { }
+
+#endif
+
+static void __init of_selftest_overlay(void)
+{
+	struct device_node *bus_np = NULL;
+	int ret;
+
+	ret = platform_driver_register(&selftest_driver);
+	if (ret != 0) {
+		selftest(0, "could not register selftest driver\n");
+		goto out;
+	}
+
+	bus_np = of_find_node_by_path(bus_path);
+	if (bus_np == NULL) {
+		selftest(0, "could not find bus_path \"%s\"\n", bus_path);
+		goto out;
+	}
+
+	ret = of_platform_populate(bus_np, of_default_bus_match_table,
+			NULL, NULL);
+	if (ret != 0) {
+		selftest(0, "could not populate bus @ \"%s\"\n", bus_path);
+		goto out;
+	}
+
+	if (!of_selftest_device_exists(100, PDEV_OVERLAY)) {
+		selftest(0, "could not find selftest0 @ \"%s\"\n",
+				selftest_path(100, PDEV_OVERLAY));
+		goto out;
+	}
+
+	if (of_selftest_device_exists(101, PDEV_OVERLAY)) {
+		selftest(0, "selftest1 @ \"%s\" should not exist\n",
+				selftest_path(101, PDEV_OVERLAY));
+		goto out;
+	}
+
+	selftest(1, "basic infrastructure of overlays passed");
+
+	/* tests in sequence */
+	of_selftest_overlay_0();
+	of_selftest_overlay_1();
+	of_selftest_overlay_2();
+	of_selftest_overlay_3();
+	of_selftest_overlay_4();
+	of_selftest_overlay_5();
+	of_selftest_overlay_6();
+	of_selftest_overlay_8();
+
+	of_selftest_overlay_10();
+	of_selftest_overlay_11();
+
+#if IS_ENABLED(CONFIG_I2C)
+	if (selftest(of_selftest_overlay_i2c_init() == 0, "i2c init failed\n"))
+		goto out;
+
+	of_selftest_overlay_i2c_12();
+	of_selftest_overlay_i2c_13();
+	of_selftest_overlay_i2c_14();
+	of_selftest_overlay_i2c_15();
+
+	of_selftest_overlay_i2c_cleanup();
+#endif
+
+out:
+	of_node_put(bus_np);
+}
+
+#else
+static inline void __init of_selftest_overlay(void) { }
+#endif
+
+static int __init of_selftest(void)
+{
+	struct device_node *np;
+	int res;
+
+	/* adding data for selftest */
+	res = selftest_data_add();
+	if (res)
+		return res;
+	if (!of_aliases)
+		of_aliases = of_find_node_by_path("/aliases");
+
+	np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
+	if (!np) {
+		pr_info("No testcase data in device tree; not running tests\n");
+		return 0;
+	}
+	of_node_put(np);
+
+	pr_info("start of selftest - you will see error messages\n");
+	of_selftest_check_tree_linkage();
+	of_selftest_check_phandles();
+	of_selftest_find_node_by_name();
+	of_selftest_dynamic();
+	of_selftest_parse_phandle_with_args();
+	of_selftest_property_string();
+	of_selftest_property_copy();
+	of_selftest_changeset();
+	of_selftest_parse_interrupts();
+	of_selftest_parse_interrupts_extended();
+	of_selftest_match_node();
+	of_selftest_platform_populate();
+	of_selftest_overlay();
+
+	/* Double check linkage after removing testcase data */
+	of_selftest_check_tree_linkage();
+
+	pr_info("end of selftest - %i passed, %i failed\n",
+		selftest_results.passed, selftest_results.failed);
+
+	return 0;
+}
+late_initcall(of_selftest);
Index: b/drivers/of/unittest.c
===================================================================
--- a/drivers/of/unittest.c
+++ /dev/null
@@ -1,1879 +0,0 @@
-/*
- * Self tests for device tree subsystem
- */
-
-#define pr_fmt(fmt) "### dt-test ### " fmt
-
-#include <linux/clk.h>
-#include <linux/err.h>
-#include <linux/errno.h>
-#include <linux/hashtable.h>
-#include <linux/module.h>
-#include <linux/of.h>
-#include <linux/of_fdt.h>
-#include <linux/of_irq.h>
-#include <linux/of_platform.h>
-#include <linux/list.h>
-#include <linux/mutex.h>
-#include <linux/slab.h>
-#include <linux/device.h>
-#include <linux/platform_device.h>
-#include <linux/of_platform.h>
-
-#include <linux/i2c.h>
-#include <linux/i2c-mux.h>
-
-#include "of_private.h"
-
-static struct selftest_results {
-	int passed;
-	int failed;
-} selftest_results;
-
-#define selftest(result, fmt, ...) ({ \
-	bool failed = !(result); \
-	if (failed) { \
-		selftest_results.failed++; \
-		pr_err("FAIL %s():%i " fmt, __func__, __LINE__, ##__VA_ARGS__); \
-	} else { \
-		selftest_results.passed++; \
-		pr_debug("pass %s():%i\n", __func__, __LINE__); \
-	} \
-	failed; \
-})
-
-static void __init of_selftest_find_node_by_name(void)
-{
-	struct device_node *np;
-	const char *options;
-
-	np = of_find_node_by_path("/testcase-data");
-	selftest(np && !strcmp("/testcase-data", np->full_name),
-		"find /testcase-data failed\n");
-	of_node_put(np);
-
-	/* Test if trailing '/' works */
-	np = of_find_node_by_path("/testcase-data/");
-	selftest(!np, "trailing '/' on /testcase-data/ should fail\n");
-
-	np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
-	selftest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", np->full_name),
-		"find /testcase-data/phandle-tests/consumer-a failed\n");
-	of_node_put(np);
-
-	np = of_find_node_by_path("testcase-alias");
-	selftest(np && !strcmp("/testcase-data", np->full_name),
-		"find testcase-alias failed\n");
-	of_node_put(np);
-
-	/* Test if trailing '/' works on aliases */
-	np = of_find_node_by_path("testcase-alias/");
-	selftest(!np, "trailing '/' on testcase-alias/ should fail\n");
-
-	np = of_find_node_by_path("testcase-alias/phandle-tests/consumer-a");
-	selftest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", np->full_name),
-		"find testcase-alias/phandle-tests/consumer-a failed\n");
-	of_node_put(np);
-
-	np = of_find_node_by_path("/testcase-data/missing-path");
-	selftest(!np, "non-existent path returned node %s\n", np->full_name);
-	of_node_put(np);
-
-	np = of_find_node_by_path("missing-alias");
-	selftest(!np, "non-existent alias returned node %s\n", np->full_name);
-	of_node_put(np);
-
-	np = of_find_node_by_path("testcase-alias/missing-path");
-	selftest(!np, "non-existent alias with relative path returned node %s\n", np->full_name);
-	of_node_put(np);
-
-	np = of_find_node_opts_by_path("/testcase-data:testoption", &options);
-	selftest(np && !strcmp("testoption", options),
-		 "option path test failed\n");
-	of_node_put(np);
-
-	np = of_find_node_opts_by_path("/testcase-data:testoption", NULL);
-	selftest(np, "NULL option path test failed\n");
-	of_node_put(np);
-
-	np = of_find_node_opts_by_path("testcase-alias:testaliasoption",
-				       &options);
-	selftest(np && !strcmp("testaliasoption", options),
-		 "option alias path test failed\n");
-	of_node_put(np);
-
-	np = of_find_node_opts_by_path("testcase-alias:testaliasoption", NULL);
-	selftest(np, "NULL option alias path test failed\n");
-	of_node_put(np);
-
-	options = "testoption";
-	np = of_find_node_opts_by_path("testcase-alias", &options);
-	selftest(np && !options, "option clearing test failed\n");
-	of_node_put(np);
-
-	options = "testoption";
-	np = of_find_node_opts_by_path("/", &options);
-	selftest(np && !options, "option clearing root node test failed\n");
-	of_node_put(np);
-}
-
-static void __init of_selftest_dynamic(void)
-{
-	struct device_node *np;
-	struct property *prop;
-
-	np = of_find_node_by_path("/testcase-data");
-	if (!np) {
-		pr_err("missing testcase data\n");
-		return;
-	}
-
-	/* Array of 4 properties for the purpose of testing */
-	prop = kzalloc(sizeof(*prop) * 4, GFP_KERNEL);
-	if (!prop) {
-		selftest(0, "kzalloc() failed\n");
-		return;
-	}
-
-	/* Add a new property - should pass*/
-	prop->name = "new-property";
-	prop->value = "new-property-data";
-	prop->length = strlen(prop->value);
-	selftest(of_add_property(np, prop) == 0, "Adding a new property failed\n");
-
-	/* Try to add an existing property - should fail */
-	prop++;
-	prop->name = "new-property";
-	prop->value = "new-property-data-should-fail";
-	prop->length = strlen(prop->value);
-	selftest(of_add_property(np, prop) != 0,
-		 "Adding an existing property should have failed\n");
-
-	/* Try to modify an existing property - should pass */
-	prop->value = "modify-property-data-should-pass";
-	prop->length = strlen(prop->value);
-	selftest(of_update_property(np, prop) == 0,
-		 "Updating an existing property should have passed\n");
-
-	/* Try to modify non-existent property - should pass*/
-	prop++;
-	prop->name = "modify-property";
-	prop->value = "modify-missing-property-data-should-pass";
-	prop->length = strlen(prop->value);
-	selftest(of_update_property(np, prop) == 0,
-		 "Updating a missing property should have passed\n");
-
-	/* Remove property - should pass */
-	selftest(of_remove_property(np, prop) == 0,
-		 "Removing a property should have passed\n");
-
-	/* Adding very large property - should pass */
-	prop++;
-	prop->name = "large-property-PAGE_SIZEx8";
-	prop->length = PAGE_SIZE * 8;
-	prop->value = kzalloc(prop->length, GFP_KERNEL);
-	selftest(prop->value != NULL, "Unable to allocate large buffer\n");
-	if (prop->value)
-		selftest(of_add_property(np, prop) == 0,
-			 "Adding a large property should have passed\n");
-}
-
-static int __init of_selftest_check_node_linkage(struct device_node *np)
-{
-	struct device_node *child;
-	int count = 0, rc;
-
-	for_each_child_of_node(np, child) {
-		if (child->parent != np) {
-			pr_err("Child node %s links to wrong parent %s\n",
-				 child->name, np->name);
-			return -EINVAL;
-		}
-
-		rc = of_selftest_check_node_linkage(child);
-		if (rc < 0)
-			return rc;
-		count += rc;
-	}
-
-	return count + 1;
-}
-
-static void __init of_selftest_check_tree_linkage(void)
-{
-	struct device_node *np;
-	int allnode_count = 0, child_count;
-
-	if (!of_root)
-		return;
-
-	for_each_of_allnodes(np)
-		allnode_count++;
-	child_count = of_selftest_check_node_linkage(of_root);
-
-	selftest(child_count > 0, "Device node data structure is corrupted\n");
-	selftest(child_count == allnode_count, "allnodes list size (%i) doesn't match"
-		 "sibling lists size (%i)\n", allnode_count, child_count);
-	pr_debug("allnodes list size (%i); sibling lists size (%i)\n", allnode_count, child_count);
-}
-
-struct node_hash {
-	struct hlist_node node;
-	struct device_node *np;
-};
-
-static DEFINE_HASHTABLE(phandle_ht, 8);
-static void __init of_selftest_check_phandles(void)
-{
-	struct device_node *np;
-	struct node_hash *nh;
-	struct hlist_node *tmp;
-	int i, dup_count = 0, phandle_count = 0;
-
-	for_each_of_allnodes(np) {
-		if (!np->phandle)
-			continue;
-
-		hash_for_each_possible(phandle_ht, nh, node, np->phandle) {
-			if (nh->np->phandle == np->phandle) {
-				pr_info("Duplicate phandle! %i used by %s and %s\n",
-					np->phandle, nh->np->full_name, np->full_name);
-				dup_count++;
-				break;
-			}
-		}
-
-		nh = kzalloc(sizeof(*nh), GFP_KERNEL);
-		if (WARN_ON(!nh))
-			return;
-
-		nh->np = np;
-		hash_add(phandle_ht, &nh->node, np->phandle);
-		phandle_count++;
-	}
-	selftest(dup_count == 0, "Found %i duplicates in %i phandles\n",
-		 dup_count, phandle_count);
-
-	/* Clean up */
-	hash_for_each_safe(phandle_ht, i, tmp, nh, node) {
-		hash_del(&nh->node);
-		kfree(nh);
-	}
-}
-
-static void __init of_selftest_parse_phandle_with_args(void)
-{
-	struct device_node *np;
-	struct of_phandle_args args;
-	int i, rc;
-
-	np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
-	if (!np) {
-		pr_err("missing testcase data\n");
-		return;
-	}
-
-	rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells");
-	selftest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc);
-
-	for (i = 0; i < 8; i++) {
-		bool passed = true;
-		rc = of_parse_phandle_with_args(np, "phandle-list",
-						"#phandle-cells", i, &args);
-
-		/* Test the values from tests-phandle.dtsi */
-		switch (i) {
-		case 0:
-			passed &= !rc;
-			passed &= (args.args_count == 1);
-			passed &= (args.args[0] == (i + 1));
-			break;
-		case 1:
-			passed &= !rc;
-			passed &= (args.args_count == 2);
-			passed &= (args.args[0] == (i + 1));
-			passed &= (args.args[1] == 0);
-			break;
-		case 2:
-			passed &= (rc == -ENOENT);
-			break;
-		case 3:
-			passed &= !rc;
-			passed &= (args.args_count == 3);
-			passed &= (args.args[0] == (i + 1));
-			passed &= (args.args[1] == 4);
-			passed &= (args.args[2] == 3);
-			break;
-		case 4:
-			passed &= !rc;
-			passed &= (args.args_count == 2);
-			passed &= (args.args[0] == (i + 1));
-			passed &= (args.args[1] == 100);
-			break;
-		case 5:
-			passed &= !rc;
-			passed &= (args.args_count == 0);
-			break;
-		case 6:
-			passed &= !rc;
-			passed &= (args.args_count == 1);
-			passed &= (args.args[0] == (i + 1));
-			break;
-		case 7:
-			passed &= (rc == -ENOENT);
-			break;
-		default:
-			passed = false;
-		}
-
-		selftest(passed, "index %i - data error on node %s rc=%i\n",
-			 i, args.np->full_name, rc);
-	}
-
-	/* Check for missing list property */
-	rc = of_parse_phandle_with_args(np, "phandle-list-missing",
-					"#phandle-cells", 0, &args);
-	selftest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
-	rc = of_count_phandle_with_args(np, "phandle-list-missing",
-					"#phandle-cells");
-	selftest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
-
-	/* Check for missing cells property */
-	rc = of_parse_phandle_with_args(np, "phandle-list",
-					"#phandle-cells-missing", 0, &args);
-	selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
-	rc = of_count_phandle_with_args(np, "phandle-list",
-					"#phandle-cells-missing");
-	selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
-
-	/* Check for bad phandle in list */
-	rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle",
-					"#phandle-cells", 0, &args);
-	selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
-	rc = of_count_phandle_with_args(np, "phandle-list-bad-phandle",
-					"#phandle-cells");
-	selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
-
-	/* Check for incorrectly formed argument list */
-	rc = of_parse_phandle_with_args(np, "phandle-list-bad-args",
-					"#phandle-cells", 1, &args);
-	selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
-	rc = of_count_phandle_with_args(np, "phandle-list-bad-args",
-					"#phandle-cells");
-	selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
-}
-
-static void __init of_selftest_property_string(void)
-{
-	const char *strings[4];
-	struct device_node *np;
-	int rc;
-
-	np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
-	if (!np) {
-		pr_err("No testcase data in device tree\n");
-		return;
-	}
-
-	rc = of_property_match_string(np, "phandle-list-names", "first");
-	selftest(rc == 0, "first expected:0 got:%i\n", rc);
-	rc = of_property_match_string(np, "phandle-list-names", "second");
-	selftest(rc == 1, "second expected:0 got:%i\n", rc);
-	rc = of_property_match_string(np, "phandle-list-names", "third");
-	selftest(rc == 2, "third expected:0 got:%i\n", rc);
-	rc = of_property_match_string(np, "phandle-list-names", "fourth");
-	selftest(rc == -ENODATA, "unmatched string; rc=%i\n", rc);
-	rc = of_property_match_string(np, "missing-property", "blah");
-	selftest(rc == -EINVAL, "missing property; rc=%i\n", rc);
-	rc = of_property_match_string(np, "empty-property", "blah");
-	selftest(rc == -ENODATA, "empty property; rc=%i\n", rc);
-	rc = of_property_match_string(np, "unterminated-string", "blah");
-	selftest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
-
-	/* of_property_count_strings() tests */
-	rc = of_property_count_strings(np, "string-property");
-	selftest(rc == 1, "Incorrect string count; rc=%i\n", rc);
-	rc = of_property_count_strings(np, "phandle-list-names");
-	selftest(rc == 3, "Incorrect string count; rc=%i\n", rc);
-	rc = of_property_count_strings(np, "unterminated-string");
-	selftest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
-	rc = of_property_count_strings(np, "unterminated-string-list");
-	selftest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
-
-	/* of_property_read_string_index() tests */
-	rc = of_property_read_string_index(np, "string-property", 0, strings);
-	selftest(rc == 0 && !strcmp(strings[0], "foobar"), "of_property_read_string_index() failure; rc=%i\n", rc);
-	strings[0] = NULL;
-	rc = of_property_read_string_index(np, "string-property", 1, strings);
-	selftest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
-	rc = of_property_read_string_index(np, "phandle-list-names", 0, strings);
-	selftest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
-	rc = of_property_read_string_index(np, "phandle-list-names", 1, strings);
-	selftest(rc == 0 && !strcmp(strings[0], "second"), "of_property_read_string_index() failure; rc=%i\n", rc);
-	rc = of_property_read_string_index(np, "phandle-list-names", 2, strings);
-	selftest(rc == 0 && !strcmp(strings[0], "third"), "of_property_read_string_index() failure; rc=%i\n", rc);
-	strings[0] = NULL;
-	rc = of_property_read_string_index(np, "phandle-list-names", 3, strings);
-	selftest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
-	strings[0] = NULL;
-	rc = of_property_read_string_index(np, "unterminated-string", 0, strings);
-	selftest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
-	rc = of_property_read_string_index(np, "unterminated-string-list", 0, strings);
-	selftest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
-	strings[0] = NULL;
-	rc = of_property_read_string_index(np, "unterminated-string-list", 2, strings); /* should fail */
-	selftest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
-	strings[1] = NULL;
-
-	/* of_property_read_string_array() tests */
-	rc = of_property_read_string_array(np, "string-property", strings, 4);
-	selftest(rc == 1, "Incorrect string count; rc=%i\n", rc);
-	rc = of_property_read_string_array(np, "phandle-list-names", strings, 4);
-	selftest(rc == 3, "Incorrect string count; rc=%i\n", rc);
-	rc = of_property_read_string_array(np, "unterminated-string", strings, 4);
-	selftest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
-	/* -- An incorrectly formed string should cause a failure */
-	rc = of_property_read_string_array(np, "unterminated-string-list", strings, 4);
-	selftest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
-	/* -- parsing the correctly formed strings should still work: */
-	strings[2] = NULL;
-	rc = of_property_read_string_array(np, "unterminated-string-list", strings, 2);
-	selftest(rc == 2 && strings[2] == NULL, "of_property_read_string_array() failure; rc=%i\n", rc);
-	strings[1] = NULL;
-	rc = of_property_read_string_array(np, "phandle-list-names", strings, 1);
-	selftest(rc == 1 && strings[1] == NULL, "Overwrote end of string array; rc=%i, str='%s'\n", rc, strings[1]);
-}
-
-#define propcmp(p1, p2) (((p1)->length == (p2)->length) && \
-			(p1)->value && (p2)->value && \
-			!memcmp((p1)->value, (p2)->value, (p1)->length) && \
-			!strcmp((p1)->name, (p2)->name))
-static void __init of_selftest_property_copy(void)
-{
-#ifdef CONFIG_OF_DYNAMIC
-	struct property p1 = { .name = "p1", .length = 0, .value = "" };
-	struct property p2 = { .name = "p2", .length = 5, .value = "abcd" };
-	struct property *new;
-
-	new = __of_prop_dup(&p1, GFP_KERNEL);
-	selftest(new && propcmp(&p1, new), "empty property didn't copy correctly\n");
-	kfree(new->value);
-	kfree(new->name);
-	kfree(new);
-
-	new = __of_prop_dup(&p2, GFP_KERNEL);
-	selftest(new && propcmp(&p2, new), "non-empty property didn't copy correctly\n");
-	kfree(new->value);
-	kfree(new->name);
-	kfree(new);
-#endif
-}
-
-static void __init of_selftest_changeset(void)
-{
-#ifdef CONFIG_OF_DYNAMIC
-	struct property *ppadd, padd = { .name = "prop-add", .length = 0, .value = "" };
-	struct property *ppupdate, pupdate = { .name = "prop-update", .length = 5, .value = "abcd" };
-	struct property *ppremove;
-	struct device_node *n1, *n2, *n21, *nremove, *parent, *np;
-	struct of_changeset chgset;
-
-	of_changeset_init(&chgset);
-	n1 = __of_node_dup(NULL, "/testcase-data/changeset/n1");
-	selftest(n1, "testcase setup failure\n");
-	n2 = __of_node_dup(NULL, "/testcase-data/changeset/n2");
-	selftest(n2, "testcase setup failure\n");
-	n21 = __of_node_dup(NULL, "%s/%s", "/testcase-data/changeset/n2", "n21");
-	selftest(n21, "testcase setup failure %p\n", n21);
-	nremove = of_find_node_by_path("/testcase-data/changeset/node-remove");
-	selftest(nremove, "testcase setup failure\n");
-	ppadd = __of_prop_dup(&padd, GFP_KERNEL);
-	selftest(ppadd, "testcase setup failure\n");
-	ppupdate = __of_prop_dup(&pupdate, GFP_KERNEL);
-	selftest(ppupdate, "testcase setup failure\n");
-	parent = nremove->parent;
-	n1->parent = parent;
-	n2->parent = parent;
-	n21->parent = n2;
-	n2->child = n21;
-	ppremove = of_find_property(parent, "prop-remove", NULL);
-	selftest(ppremove, "failed to find removal prop");
-
-	of_changeset_init(&chgset);
-	selftest(!of_changeset_attach_node(&chgset, n1), "fail attach n1\n");
-	selftest(!of_changeset_attach_node(&chgset, n2), "fail attach n2\n");
-	selftest(!of_changeset_detach_node(&chgset, nremove), "fail remove node\n");
-	selftest(!of_changeset_attach_node(&chgset, n21), "fail attach n21\n");
-	selftest(!of_changeset_add_property(&chgset, parent, ppadd), "fail add prop\n");
-	selftest(!of_changeset_update_property(&chgset, parent, ppupdate), "fail update prop\n");
-	selftest(!of_changeset_remove_property(&chgset, parent, ppremove), "fail remove prop\n");
-	mutex_lock(&of_mutex);
-	selftest(!of_changeset_apply(&chgset), "apply failed\n");
-	mutex_unlock(&of_mutex);
-
-	/* Make sure node names are constructed correctly */
-	selftest((np = of_find_node_by_path("/testcase-data/changeset/n2/n21")),
-		 "'%s' not added\n", n21->full_name);
-	of_node_put(np);
-
-	mutex_lock(&of_mutex);
-	selftest(!of_changeset_revert(&chgset), "revert failed\n");
-	mutex_unlock(&of_mutex);
-
-	of_changeset_destroy(&chgset);
-#endif
-}
-
-static void __init of_selftest_parse_interrupts(void)
-{
-	struct device_node *np;
-	struct of_phandle_args args;
-	int i, rc;
-
-	np = of_find_node_by_path("/testcase-data/interrupts/interrupts0");
-	if (!np) {
-		pr_err("missing testcase data\n");
-		return;
-	}
-
-	for (i = 0; i < 4; i++) {
-		bool passed = true;
-		args.args_count = 0;
-		rc = of_irq_parse_one(np, i, &args);
-
-		passed &= !rc;
-		passed &= (args.args_count == 1);
-		passed &= (args.args[0] == (i + 1));
-
-		selftest(passed, "index %i - data error on node %s rc=%i\n",
-			 i, args.np->full_name, rc);
-	}
-	of_node_put(np);
-
-	np = of_find_node_by_path("/testcase-data/interrupts/interrupts1");
-	if (!np) {
-		pr_err("missing testcase data\n");
-		return;
-	}
-
-	for (i = 0; i < 4; i++) {
-		bool passed = true;
-		args.args_count = 0;
-		rc = of_irq_parse_one(np, i, &args);
-
-		/* Test the values from tests-phandle.dtsi */
-		switch (i) {
-		case 0:
-			passed &= !rc;
-			passed &= (args.args_count == 1);
-			passed &= (args.args[0] == 9);
-			break;
-		case 1:
-			passed &= !rc;
-			passed &= (args.args_count == 3);
-			passed &= (args.args[0] == 10);
-			passed &= (args.args[1] == 11);
-			passed &= (args.args[2] == 12);
-			break;
-		case 2:
-			passed &= !rc;
-			passed &= (args.args_count == 2);
-			passed &= (args.args[0] == 13);
-			passed &= (args.args[1] == 14);
-			break;
-		case 3:
-			passed &= !rc;
-			passed &= (args.args_count == 2);
-			passed &= (args.args[0] == 15);
-			passed &= (args.args[1] == 16);
-			break;
-		default:
-			passed = false;
-		}
-		selftest(passed, "index %i - data error on node %s rc=%i\n",
-			 i, args.np->full_name, rc);
-	}
-	of_node_put(np);
-}
-
-static void __init of_selftest_parse_interrupts_extended(void)
-{
-	struct device_node *np;
-	struct of_phandle_args args;
-	int i, rc;
-
-	np = of_find_node_by_path("/testcase-data/interrupts/interrupts-extended0");
-	if (!np) {
-		pr_err("missing testcase data\n");
-		return;
-	}
-
-	for (i = 0; i < 7; i++) {
-		bool passed = true;
-		rc = of_irq_parse_one(np, i, &args);
-
-		/* Test the values from tests-phandle.dtsi */
-		switch (i) {
-		case 0:
-			passed &= !rc;
-			passed &= (args.args_count == 1);
-			passed &= (args.args[0] == 1);
-			break;
-		case 1:
-			passed &= !rc;
-			passed &= (args.args_count == 3);
-			passed &= (args.args[0] == 2);
-			passed &= (args.args[1] == 3);
-			passed &= (args.args[2] == 4);
-			break;
-		case 2:
-			passed &= !rc;
-			passed &= (args.args_count == 2);
-			passed &= (args.args[0] == 5);
-			passed &= (args.args[1] == 6);
-			break;
-		case 3:
-			passed &= !rc;
-			passed &= (args.args_count == 1);
-			passed &= (args.args[0] == 9);
-			break;
-		case 4:
-			passed &= !rc;
-			passed &= (args.args_count == 3);
-			passed &= (args.args[0] == 10);
-			passed &= (args.args[1] == 11);
-			passed &= (args.args[2] == 12);
-			break;
-		case 5:
-			passed &= !rc;
-			passed &= (args.args_count == 2);
-			passed &= (args.args[0] == 13);
-			passed &= (args.args[1] == 14);
-			break;
-		case 6:
-			passed &= !rc;
-			passed &= (args.args_count == 1);
-			passed &= (args.args[0] == 15);
-			break;
-		default:
-			passed = false;
-		}
-
-		selftest(passed, "index %i - data error on node %s rc=%i\n",
-			 i, args.np->full_name, rc);
-	}
-	of_node_put(np);
-}
-
-static struct of_device_id match_node_table[] = {
-	{ .data = "A", .name = "name0", }, /* Name alone is lowest priority */
-	{ .data = "B", .type = "type1", }, /* followed by type alone */
-
-	{ .data = "Ca", .name = "name2", .type = "type1", }, /* followed by both together */
-	{ .data = "Cb", .name = "name2", }, /* Only match when type doesn't match */
-	{ .data = "Cc", .name = "name2", .type = "type2", },
-
-	{ .data = "E", .compatible = "compat3" },
-	{ .data = "G", .compatible = "compat2", },
-	{ .data = "H", .compatible = "compat2", .name = "name5", },
-	{ .data = "I", .compatible = "compat2", .type = "type1", },
-	{ .data = "J", .compatible = "compat2", .type = "type1", .name = "name8", },
-	{ .data = "K", .compatible = "compat2", .name = "name9", },
-	{}
-};
-
-static struct {
-	const char *path;
-	const char *data;
-} match_node_tests[] = {
-	{ .path = "/testcase-data/match-node/name0", .data = "A", },
-	{ .path = "/testcase-data/match-node/name1", .data = "B", },
-	{ .path = "/testcase-data/match-node/a/name2", .data = "Ca", },
-	{ .path = "/testcase-data/match-node/b/name2", .data = "Cb", },
-	{ .path = "/testcase-data/match-node/c/name2", .data = "Cc", },
-	{ .path = "/testcase-data/match-node/name3", .data = "E", },
-	{ .path = "/testcase-data/match-node/name4", .data = "G", },
-	{ .path = "/testcase-data/match-node/name5", .data = "H", },
-	{ .path = "/testcase-data/match-node/name6", .data = "G", },
-	{ .path = "/testcase-data/match-node/name7", .data = "I", },
-	{ .path = "/testcase-data/match-node/name8", .data = "J", },
-	{ .path = "/testcase-data/match-node/name9", .data = "K", },
-};
-
-static void __init of_selftest_match_node(void)
-{
-	struct device_node *np;
-	const struct of_device_id *match;
-	int i;
-
-	for (i = 0; i < ARRAY_SIZE(match_node_tests); i++) {
-		np = of_find_node_by_path(match_node_tests[i].path);
-		if (!np) {
-			selftest(0, "missing testcase node %s\n",
-				match_node_tests[i].path);
-			continue;
-		}
-
-		match = of_match_node(match_node_table, np);
-		if (!match) {
-			selftest(0, "%s didn't match anything\n",
-				match_node_tests[i].path);
-			continue;
-		}
-
-		if (strcmp(match->data, match_node_tests[i].data) != 0) {
-			selftest(0, "%s got wrong match. expected %s, got %s\n",
-				match_node_tests[i].path, match_node_tests[i].data,
-				(const char *)match->data);
-			continue;
-		}
-		selftest(1, "passed");
-	}
-}
-
-struct device test_bus = {
-	.init_name = "unittest-bus",
-};
-static void __init of_selftest_platform_populate(void)
-{
-	int irq, rc;
-	struct device_node *np, *child, *grandchild;
-	struct platform_device *pdev;
-	struct of_device_id match[] = {
-		{ .compatible = "test-device", },
-		{}
-	};
-
-	np = of_find_node_by_path("/testcase-data");
-	of_platform_populate(np, of_default_bus_match_table, NULL, NULL);
-
-	/* Test that a missing irq domain returns -EPROBE_DEFER */
-	np = of_find_node_by_path("/testcase-data/testcase-device1");
-	pdev = of_find_device_by_node(np);
-	selftest(pdev, "device 1 creation failed\n");
-
-	irq = platform_get_irq(pdev, 0);
-	selftest(irq == -EPROBE_DEFER, "device deferred probe failed - %d\n", irq);
-
-	/* Test that a parsing failure does not return -EPROBE_DEFER */
-	np = of_find_node_by_path("/testcase-data/testcase-device2");
-	pdev = of_find_device_by_node(np);
-	selftest(pdev, "device 2 creation failed\n");
-	irq = platform_get_irq(pdev, 0);
-	selftest(irq < 0 && irq != -EPROBE_DEFER, "device parsing error failed - %d\n", irq);
-
-	if (selftest(np = of_find_node_by_path("/testcase-data/platform-tests"),
-		     "No testcase data in device tree\n"));
-		return;
-
-	if (selftest(!(rc = device_register(&test_bus)),
-		     "testbus registration failed; rc=%i\n", rc));
-		return;
-
-	for_each_child_of_node(np, child) {
-		of_platform_populate(child, match, NULL, &test_bus);
-		for_each_child_of_node(child, grandchild)
-			selftest(of_find_device_by_node(grandchild),
-				 "Could not create device for node '%s'\n",
-				 grandchild->name);
-	}
-
-	of_platform_depopulate(&test_bus);
-	for_each_child_of_node(np, child) {
-		for_each_child_of_node(child, grandchild)
-			selftest(!of_find_device_by_node(grandchild),
-				 "device didn't get destroyed '%s'\n",
-				 grandchild->name);
-	}
-
-	device_unregister(&test_bus);
-	of_node_put(np);
-}
-
-/**
- *	update_node_properties - adds the properties
- *	of np into dup node (present in live tree) and
- *	updates parent of children of np to dup.
- *
- *	@np:	node already present in live tree
- *	@dup:	node present in live tree to be updated
- */
-static void update_node_properties(struct device_node *np,
-					struct device_node *dup)
-{
-	struct property *prop;
-	struct device_node *child;
-
-	for_each_property_of_node(np, prop)
-		of_add_property(dup, prop);
-
-	for_each_child_of_node(np, child)
-		child->parent = dup;
-}
-
-/**
- *	attach_node_and_children - attaches nodes
- *	and its children to live tree
- *
- *	@np:	Node to attach to live tree
- */
-static int attach_node_and_children(struct device_node *np)
-{
-	struct device_node *next, *dup, *child;
-	unsigned long flags;
-
-	dup = of_find_node_by_path(np->full_name);
-	if (dup) {
-		update_node_properties(np, dup);
-		return 0;
-	}
-
-	child = np->child;
-	np->child = NULL;
-
-	mutex_lock(&of_mutex);
-	raw_spin_lock_irqsave(&devtree_lock, flags);
-	np->sibling = np->parent->child;
-	np->parent->child = np;
-	of_node_clear_flag(np, OF_DETACHED);
-	raw_spin_unlock_irqrestore(&devtree_lock, flags);
-
-	__of_attach_node_sysfs(np);
-	mutex_unlock(&of_mutex);
-
-	while (child) {
-		next = child->sibling;
-		attach_node_and_children(child);
-		child = next;
-	}
-
-	return 0;
-}
-
-/**
- *	selftest_data_add - Reads, copies data from
- *	linked tree and attaches it to the live tree
- */
-static int __init selftest_data_add(void)
-{
-	void *selftest_data;
-	struct device_node *selftest_data_node, *np;
-	extern uint8_t __dtb_testcases_begin[];
-	extern uint8_t __dtb_testcases_end[];
-	const int size = __dtb_testcases_end - __dtb_testcases_begin;
-	int rc;
-
-	if (!size) {
-		pr_warn("%s: No testcase data to attach; not running tests\n",
-			__func__);
-		return -ENODATA;
-	}
-
-	/* creating copy */
-	selftest_data = kmemdup(__dtb_testcases_begin, size, GFP_KERNEL);
-
-	if (!selftest_data) {
-		pr_warn("%s: Failed to allocate memory for selftest_data; "
-			"not running tests\n", __func__);
-		return -ENOMEM;
-	}
-	of_fdt_unflatten_tree(selftest_data, &selftest_data_node);
-	if (!selftest_data_node) {
-		pr_warn("%s: No tree to attach; not running tests\n", __func__);
-		return -ENODATA;
-	}
-	of_node_set_flag(selftest_data_node, OF_DETACHED);
-	rc = of_resolve_phandles(selftest_data_node);
-	if (rc) {
-		pr_err("%s: Failed to resolve phandles (rc=%i)\n", __func__, rc);
-		return -EINVAL;
-	}
-
-	if (!of_root) {
-		of_root = selftest_data_node;
-		for_each_of_allnodes(np)
-			__of_attach_node_sysfs(np);
-		of_aliases = of_find_node_by_path("/aliases");
-		of_chosen = of_find_node_by_path("/chosen");
-		return 0;
-	}
-
-	/* attach the sub-tree to live tree */
-	np = selftest_data_node->child;
-	while (np) {
-		struct device_node *next = np->sibling;
-		np->parent = of_root;
-		attach_node_and_children(np);
-		np = next;
-	}
-	return 0;
-}
-
-#ifdef CONFIG_OF_OVERLAY
-
-static int selftest_probe(struct platform_device *pdev)
-{
-	struct device *dev = &pdev->dev;
-	struct device_node *np = dev->of_node;
-
-	if (np == NULL) {
-		dev_err(dev, "No OF data for device\n");
-		return -EINVAL;
-
-	}
-
-	dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
-
-	of_platform_populate(np, NULL, NULL, &pdev->dev);
-
-	return 0;
-}
-
-static int selftest_remove(struct platform_device *pdev)
-{
-	struct device *dev = &pdev->dev;
-	struct device_node *np = dev->of_node;
-
-	dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
-	return 0;
-}
-
-static struct of_device_id selftest_match[] = {
-	{ .compatible = "selftest", },
-	{},
-};
-
-static struct platform_driver selftest_driver = {
-	.probe			= selftest_probe,
-	.remove			= selftest_remove,
-	.driver = {
-		.name		= "selftest",
-		.owner		= THIS_MODULE,
-		.of_match_table	= of_match_ptr(selftest_match),
-	},
-};
-
-/* get the platform device instantiated at the path */
-static struct platform_device *of_path_to_platform_device(const char *path)
-{
-	struct device_node *np;
-	struct platform_device *pdev;
-
-	np = of_find_node_by_path(path);
-	if (np == NULL)
-		return NULL;
-
-	pdev = of_find_device_by_node(np);
-	of_node_put(np);
-
-	return pdev;
-}
-
-/* find out if a platform device exists at that path */
-static int of_path_platform_device_exists(const char *path)
-{
-	struct platform_device *pdev;
-
-	pdev = of_path_to_platform_device(path);
-	platform_device_put(pdev);
-	return pdev != NULL;
-}
-
-#if IS_ENABLED(CONFIG_I2C)
-
-/* get the i2c client device instantiated at the path */
-static struct i2c_client *of_path_to_i2c_client(const char *path)
-{
-	struct device_node *np;
-	struct i2c_client *client;
-
-	np = of_find_node_by_path(path);
-	if (np == NULL)
-		return NULL;
-
-	client = of_find_i2c_device_by_node(np);
-	of_node_put(np);
-
-	return client;
-}
-
-/* find out if a i2c client device exists at that path */
-static int of_path_i2c_client_exists(const char *path)
-{
-	struct i2c_client *client;
-
-	client = of_path_to_i2c_client(path);
-	if (client)
-		put_device(&client->dev);
-	return client != NULL;
-}
-#else
-static int of_path_i2c_client_exists(const char *path)
-{
-	return 0;
-}
-#endif
-
-enum overlay_type {
-	PDEV_OVERLAY,
-	I2C_OVERLAY
-};
-
-static int of_path_device_type_exists(const char *path,
-		enum overlay_type ovtype)
-{
-	switch (ovtype) {
-	case PDEV_OVERLAY:
-		return of_path_platform_device_exists(path);
-	case I2C_OVERLAY:
-		return of_path_i2c_client_exists(path);
-	}
-	return 0;
-}
-
-static const char *selftest_path(int nr, enum overlay_type ovtype)
-{
-	const char *base;
-	static char buf[256];
-
-	switch (ovtype) {
-	case PDEV_OVERLAY:
-		base = "/testcase-data/overlay-node/test-bus";
-		break;
-	case I2C_OVERLAY:
-		base = "/testcase-data/overlay-node/test-bus/i2c-test-bus";
-		break;
-	default:
-		buf[0] = '\0';
-		return buf;
-	}
-	snprintf(buf, sizeof(buf) - 1, "%s/test-selftest%d", base, nr);
-	buf[sizeof(buf) - 1] = '\0';
-	return buf;
-}
-
-static int of_selftest_device_exists(int selftest_nr, enum overlay_type ovtype)
-{
-	const char *path;
-
-	path = selftest_path(selftest_nr, ovtype);
-
-	switch (ovtype) {
-	case PDEV_OVERLAY:
-		return of_path_platform_device_exists(path);
-	case I2C_OVERLAY:
-		return of_path_i2c_client_exists(path);
-	}
-	return 0;
-}
-
-static const char *overlay_path(int nr)
-{
-	static char buf[256];
-
-	snprintf(buf, sizeof(buf) - 1,
-		"/testcase-data/overlay%d", nr);
-	buf[sizeof(buf) - 1] = '\0';
-
-	return buf;
-}
-
-static const char *bus_path = "/testcase-data/overlay-node/test-bus";
-
-static int of_selftest_apply_overlay(int selftest_nr, int overlay_nr,
-		int *overlay_id)
-{
-	struct device_node *np = NULL;
-	int ret, id = -1;
-
-	np = of_find_node_by_path(overlay_path(overlay_nr));
-	if (np == NULL) {
-		selftest(0, "could not find overlay node @\"%s\"\n",
-				overlay_path(overlay_nr));
-		ret = -EINVAL;
-		goto out;
-	}
-
-	ret = of_overlay_create(np);
-	if (ret < 0) {
-		selftest(0, "could not create overlay from \"%s\"\n",
-				overlay_path(overlay_nr));
-		goto out;
-	}
-	id = ret;
-
-	ret = 0;
-
-out:
-	of_node_put(np);
-
-	if (overlay_id)
-		*overlay_id = id;
-
-	return ret;
-}
-
-/* apply an overlay while checking before and after states */
-static int of_selftest_apply_overlay_check(int overlay_nr, int selftest_nr,
-		int before, int after, enum overlay_type ovtype)
-{
-	int ret;
-
-	/* selftest device must not be in before state */
-	if (of_selftest_device_exists(selftest_nr, ovtype) != before) {
-		selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
-				overlay_path(overlay_nr),
-				selftest_path(selftest_nr, ovtype),
-				!before ? "enabled" : "disabled");
-		return -EINVAL;
-	}
-
-	ret = of_selftest_apply_overlay(overlay_nr, selftest_nr, NULL);
-	if (ret != 0) {
-		/* of_selftest_apply_overlay already called selftest() */
-		return ret;
-	}
-
-	/* selftest device must be to set to after state */
-	if (of_selftest_device_exists(selftest_nr, ovtype) != after) {
-		selftest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n",
-				overlay_path(overlay_nr),
-				selftest_path(selftest_nr, ovtype),
-				!after ? "enabled" : "disabled");
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
-/* apply an overlay and then revert it while checking before, after states */
-static int of_selftest_apply_revert_overlay_check(int overlay_nr,
-		int selftest_nr, int before, int after,
-		enum overlay_type ovtype)
-{
-	int ret, ov_id;
-
-	/* selftest device must be in before state */
-	if (of_selftest_device_exists(selftest_nr, ovtype) != before) {
-		selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
-				overlay_path(overlay_nr),
-				selftest_path(selftest_nr, ovtype),
-				!before ? "enabled" : "disabled");
-		return -EINVAL;
-	}
-
-	/* apply the overlay */
-	ret = of_selftest_apply_overlay(overlay_nr, selftest_nr, &ov_id);
-	if (ret != 0) {
-		/* of_selftest_apply_overlay already called selftest() */
-		return ret;
-	}
-
-	/* selftest device must be in after state */
-	if (of_selftest_device_exists(selftest_nr, ovtype) != after) {
-		selftest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n",
-				overlay_path(overlay_nr),
-				selftest_path(selftest_nr, ovtype),
-				!after ? "enabled" : "disabled");
-		return -EINVAL;
-	}
-
-	ret = of_overlay_destroy(ov_id);
-	if (ret != 0) {
-		selftest(0, "overlay @\"%s\" failed to be destroyed @\"%s\"\n",
-				overlay_path(overlay_nr),
-				selftest_path(selftest_nr, ovtype));
-		return ret;
-	}
-
-	/* selftest device must be again in before state */
-	if (of_selftest_device_exists(selftest_nr, PDEV_OVERLAY) != before) {
-		selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
-				overlay_path(overlay_nr),
-				selftest_path(selftest_nr, ovtype),
-				!before ? "enabled" : "disabled");
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
-/* test activation of device */
-static void of_selftest_overlay_0(void)
-{
-	int ret;
-
-	/* device should enable */
-	ret = of_selftest_apply_overlay_check(0, 0, 0, 1, PDEV_OVERLAY);
-	if (ret != 0)
-		return;
-
-	selftest(1, "overlay test %d passed\n", 0);
-}
-
-/* test deactivation of device */
-static void of_selftest_overlay_1(void)
-{
-	int ret;
-
-	/* device should disable */
-	ret = of_selftest_apply_overlay_check(1, 1, 1, 0, PDEV_OVERLAY);
-	if (ret != 0)
-		return;
-
-	selftest(1, "overlay test %d passed\n", 1);
-}
-
-/* test activation of device */
-static void of_selftest_overlay_2(void)
-{
-	int ret;
-
-	/* device should enable */
-	ret = of_selftest_apply_overlay_check(2, 2, 0, 1, PDEV_OVERLAY);
-	if (ret != 0)
-		return;
-
-	selftest(1, "overlay test %d passed\n", 2);
-}
-
-/* test deactivation of device */
-static void of_selftest_overlay_3(void)
-{
-	int ret;
-
-	/* device should disable */
-	ret = of_selftest_apply_overlay_check(3, 3, 1, 0, PDEV_OVERLAY);
-	if (ret != 0)
-		return;
-
-	selftest(1, "overlay test %d passed\n", 3);
-}
-
-/* test activation of a full device node */
-static void of_selftest_overlay_4(void)
-{
-	int ret;
-
-	/* device should disable */
-	ret = of_selftest_apply_overlay_check(4, 4, 0, 1, PDEV_OVERLAY);
-	if (ret != 0)
-		return;
-
-	selftest(1, "overlay test %d passed\n", 4);
-}
-
-/* test overlay apply/revert sequence */
-static void of_selftest_overlay_5(void)
-{
-	int ret;
-
-	/* device should disable */
-	ret = of_selftest_apply_revert_overlay_check(5, 5, 0, 1, PDEV_OVERLAY);
-	if (ret != 0)
-		return;
-
-	selftest(1, "overlay test %d passed\n", 5);
-}
-
-/* test overlay application in sequence */
-static void of_selftest_overlay_6(void)
-{
-	struct device_node *np;
-	int ret, i, ov_id[2];
-	int overlay_nr = 6, selftest_nr = 6;
-	int before = 0, after = 1;
-
-	/* selftest device must be in before state */
-	for (i = 0; i < 2; i++) {
-		if (of_selftest_device_exists(selftest_nr + i, PDEV_OVERLAY)
-				!= before) {
-			selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
-					overlay_path(overlay_nr + i),
-					selftest_path(selftest_nr + i,
-						PDEV_OVERLAY),
-					!before ? "enabled" : "disabled");
-			return;
-		}
-	}
-
-	/* apply the overlays */
-	for (i = 0; i < 2; i++) {
-
-		np = of_find_node_by_path(overlay_path(overlay_nr + i));
-		if (np == NULL) {
-			selftest(0, "could not find overlay node @\"%s\"\n",
-					overlay_path(overlay_nr + i));
-			return;
-		}
-
-		ret = of_overlay_create(np);
-		if (ret < 0)  {
-			selftest(0, "could not create overlay from \"%s\"\n",
-					overlay_path(overlay_nr + i));
-			return;
-		}
-		ov_id[i] = ret;
-	}
-
-	for (i = 0; i < 2; i++) {
-		/* selftest device must be in after state */
-		if (of_selftest_device_exists(selftest_nr + i, PDEV_OVERLAY)
-				!= after) {
-			selftest(0, "overlay @\"%s\" failed @\"%s\" %s\n",
-					overlay_path(overlay_nr + i),
-					selftest_path(selftest_nr + i,
-						PDEV_OVERLAY),
-					!after ? "enabled" : "disabled");
-			return;
-		}
-	}
-
-	for (i = 1; i >= 0; i--) {
-		ret = of_overlay_destroy(ov_id[i]);
-		if (ret != 0) {
-			selftest(0, "overlay @\"%s\" failed destroy @\"%s\"\n",
-					overlay_path(overlay_nr + i),
-					selftest_path(selftest_nr + i,
-						PDEV_OVERLAY));
-			return;
-		}
-	}
-
-	for (i = 0; i < 2; i++) {
-		/* selftest device must be again in before state */
-		if (of_selftest_device_exists(selftest_nr + i, PDEV_OVERLAY)
-				!= before) {
-			selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
-					overlay_path(overlay_nr + i),
-					selftest_path(selftest_nr + i,
-						PDEV_OVERLAY),
-					!before ? "enabled" : "disabled");
-			return;
-		}
-	}
-
-	selftest(1, "overlay test %d passed\n", 6);
-}
-
-/* test overlay application in sequence */
-static void of_selftest_overlay_8(void)
-{
-	struct device_node *np;
-	int ret, i, ov_id[2];
-	int overlay_nr = 8, selftest_nr = 8;
-
-	/* we don't care about device state in this test */
-
-	/* apply the overlays */
-	for (i = 0; i < 2; i++) {
-
-		np = of_find_node_by_path(overlay_path(overlay_nr + i));
-		if (np == NULL) {
-			selftest(0, "could not find overlay node @\"%s\"\n",
-					overlay_path(overlay_nr + i));
-			return;
-		}
-
-		ret = of_overlay_create(np);
-		if (ret < 0)  {
-			selftest(0, "could not create overlay from \"%s\"\n",
-					overlay_path(overlay_nr + i));
-			return;
-		}
-		ov_id[i] = ret;
-	}
-
-	/* now try to remove first overlay (it should fail) */
-	ret = of_overlay_destroy(ov_id[0]);
-	if (ret == 0) {
-		selftest(0, "overlay @\"%s\" was destroyed @\"%s\"\n",
-				overlay_path(overlay_nr + 0),
-				selftest_path(selftest_nr,
-					PDEV_OVERLAY));
-		return;
-	}
-
-	/* removing them in order should work */
-	for (i = 1; i >= 0; i--) {
-		ret = of_overlay_destroy(ov_id[i]);
-		if (ret != 0) {
-			selftest(0, "overlay @\"%s\" not destroyed @\"%s\"\n",
-					overlay_path(overlay_nr + i),
-					selftest_path(selftest_nr,
-						PDEV_OVERLAY));
-			return;
-		}
-	}
-
-	selftest(1, "overlay test %d passed\n", 8);
-}
-
-/* test insertion of a bus with parent devices */
-static void of_selftest_overlay_10(void)
-{
-	int ret;
-	char *child_path;
-
-	/* device should disable */
-	ret = of_selftest_apply_overlay_check(10, 10, 0, 1, PDEV_OVERLAY);
-	if (selftest(ret == 0,
-			"overlay test %d failed; overlay application\n", 10))
-		return;
-
-	child_path = kasprintf(GFP_KERNEL, "%s/test-selftest101",
-			selftest_path(10, PDEV_OVERLAY));
-	if (selftest(child_path, "overlay test %d failed; kasprintf\n", 10))
-		return;
-
-	ret = of_path_device_type_exists(child_path, PDEV_OVERLAY);
-	kfree(child_path);
-	if (selftest(ret, "overlay test %d failed; no child device\n", 10))
-		return;
-}
-
-/* test insertion of a bus with parent devices (and revert) */
-static void of_selftest_overlay_11(void)
-{
-	int ret;
-
-	/* device should disable */
-	ret = of_selftest_apply_revert_overlay_check(11, 11, 0, 1,
-			PDEV_OVERLAY);
-	if (selftest(ret == 0,
-			"overlay test %d failed; overlay application\n", 11))
-		return;
-}
-
-#if IS_ENABLED(CONFIG_I2C) && IS_ENABLED(CONFIG_OF_OVERLAY)
-
-struct selftest_i2c_bus_data {
-	struct platform_device	*pdev;
-	struct i2c_adapter	adap;
-};
-
-static int selftest_i2c_master_xfer(struct i2c_adapter *adap,
-		struct i2c_msg *msgs, int num)
-{
-	struct selftest_i2c_bus_data *std = i2c_get_adapdata(adap);
-
-	(void)std;
-
-	return num;
-}
-
-static u32 selftest_i2c_functionality(struct i2c_adapter *adap)
-{
-	return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
-}
-
-static const struct i2c_algorithm selftest_i2c_algo = {
-	.master_xfer	= selftest_i2c_master_xfer,
-	.functionality	= selftest_i2c_functionality,
-};
-
-static int selftest_i2c_bus_probe(struct platform_device *pdev)
-{
-	struct device *dev = &pdev->dev;
-	struct device_node *np = dev->of_node;
-	struct selftest_i2c_bus_data *std;
-	struct i2c_adapter *adap;
-	int ret;
-
-	if (np == NULL) {
-		dev_err(dev, "No OF data for device\n");
-		return -EINVAL;
-
-	}
-
-	dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
-
-	std = devm_kzalloc(dev, sizeof(*std), GFP_KERNEL);
-	if (!std) {
-		dev_err(dev, "Failed to allocate selftest i2c data\n");
-		return -ENOMEM;
-	}
-
-	/* link them together */
-	std->pdev = pdev;
-	platform_set_drvdata(pdev, std);
-
-	adap = &std->adap;
-	i2c_set_adapdata(adap, std);
-	adap->nr = -1;
-	strlcpy(adap->name, pdev->name, sizeof(adap->name));
-	adap->class = I2C_CLASS_DEPRECATED;
-	adap->algo = &selftest_i2c_algo;
-	adap->dev.parent = dev;
-	adap->dev.of_node = dev->of_node;
-	adap->timeout = 5 * HZ;
-	adap->retries = 3;
-
-	ret = i2c_add_numbered_adapter(adap);
-	if (ret != 0) {
-		dev_err(dev, "Failed to add I2C adapter\n");
-		return ret;
-	}
-
-	return 0;
-}
-
-static int selftest_i2c_bus_remove(struct platform_device *pdev)
-{
-	struct device *dev = &pdev->dev;
-	struct device_node *np = dev->of_node;
-	struct selftest_i2c_bus_data *std = platform_get_drvdata(pdev);
-
-	dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
-	i2c_del_adapter(&std->adap);
-
-	return 0;
-}
-
-static struct of_device_id selftest_i2c_bus_match[] = {
-	{ .compatible = "selftest-i2c-bus", },
-	{},
-};
-
-static struct platform_driver selftest_i2c_bus_driver = {
-	.probe			= selftest_i2c_bus_probe,
-	.remove			= selftest_i2c_bus_remove,
-	.driver = {
-		.name		= "selftest-i2c-bus",
-		.of_match_table	= of_match_ptr(selftest_i2c_bus_match),
-	},
-};
-
-static int selftest_i2c_dev_probe(struct i2c_client *client,
-		const struct i2c_device_id *id)
-{
-	struct device *dev = &client->dev;
-	struct device_node *np = client->dev.of_node;
-
-	if (!np) {
-		dev_err(dev, "No OF node\n");
-		return -EINVAL;
-	}
-
-	dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
-
-	return 0;
-};
-
-static int selftest_i2c_dev_remove(struct i2c_client *client)
-{
-	struct device *dev = &client->dev;
-	struct device_node *np = client->dev.of_node;
-
-	dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
-	return 0;
-}
-
-static const struct i2c_device_id selftest_i2c_dev_id[] = {
-	{ .name = "selftest-i2c-dev" },
-	{ }
-};
-
-static struct i2c_driver selftest_i2c_dev_driver = {
-	.driver = {
-		.name = "selftest-i2c-dev",
-		.owner = THIS_MODULE,
-	},
-	.probe = selftest_i2c_dev_probe,
-	.remove = selftest_i2c_dev_remove,
-	.id_table = selftest_i2c_dev_id,
-};
-
-#if IS_ENABLED(CONFIG_I2C_MUX)
-
-struct selftest_i2c_mux_data {
-	int nchans;
-	struct i2c_adapter *adap[];
-};
-
-static int selftest_i2c_mux_select_chan(struct i2c_adapter *adap,
-			       void *client, u32 chan)
-{
-	return 0;
-}
-
-static int selftest_i2c_mux_probe(struct i2c_client *client,
-		const struct i2c_device_id *id)
-{
-	int ret, i, nchans, size;
-	struct device *dev = &client->dev;
-	struct i2c_adapter *adap = to_i2c_adapter(dev->parent);
-	struct device_node *np = client->dev.of_node, *child;
-	struct selftest_i2c_mux_data *stm;
-	u32 reg, max_reg;
-
-	dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
-
-	if (!np) {
-		dev_err(dev, "No OF node\n");
-		return -EINVAL;
-	}
-
-	max_reg = (u32)-1;
-	for_each_child_of_node(np, child) {
-		ret = of_property_read_u32(child, "reg", &reg);
-		if (ret)
-			continue;
-		if (max_reg == (u32)-1 || reg > max_reg)
-			max_reg = reg;
-	}
-	nchans = max_reg == (u32)-1 ? 0 : max_reg + 1;
-	if (nchans == 0) {
-		dev_err(dev, "No channels\n");
-		return -EINVAL;
-	}
-
-	size = offsetof(struct selftest_i2c_mux_data, adap[nchans]);
-	stm = devm_kzalloc(dev, size, GFP_KERNEL);
-	if (!stm) {
-		dev_err(dev, "Out of memory\n");
-		return -ENOMEM;
-	}
-	stm->nchans = nchans;
-	for (i = 0; i < nchans; i++) {
-		stm->adap[i] = i2c_add_mux_adapter(adap, dev, client,
-				0, i, 0, selftest_i2c_mux_select_chan, NULL);
-		if (!stm->adap[i]) {
-			dev_err(dev, "Failed to register mux #%d\n", i);
-			for (i--; i >= 0; i--)
-				i2c_del_mux_adapter(stm->adap[i]);
-			return -ENODEV;
-		}
-	}
-
-	i2c_set_clientdata(client, stm);
-
-	return 0;
-};
-
-static int selftest_i2c_mux_remove(struct i2c_client *client)
-{
-	struct device *dev = &client->dev;
-	struct device_node *np = client->dev.of_node;
-	struct selftest_i2c_mux_data *stm = i2c_get_clientdata(client);
-	int i;
-
-	dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
-	for (i = stm->nchans - 1; i >= 0; i--)
-		i2c_del_mux_adapter(stm->adap[i]);
-	return 0;
-}
-
-static const struct i2c_device_id selftest_i2c_mux_id[] = {
-	{ .name = "selftest-i2c-mux" },
-	{ }
-};
-
-static struct i2c_driver selftest_i2c_mux_driver = {
-	.driver = {
-		.name = "selftest-i2c-mux",
-		.owner = THIS_MODULE,
-	},
-	.probe = selftest_i2c_mux_probe,
-	.remove = selftest_i2c_mux_remove,
-	.id_table = selftest_i2c_mux_id,
-};
-
-#endif
-
-static int of_selftest_overlay_i2c_init(void)
-{
-	int ret;
-
-	ret = i2c_add_driver(&selftest_i2c_dev_driver);
-	if (selftest(ret == 0,
-			"could not register selftest i2c device driver\n"))
-		return ret;
-
-	ret = platform_driver_register(&selftest_i2c_bus_driver);
-	if (selftest(ret == 0,
-			"could not register selftest i2c bus driver\n"))
-		return ret;
-
-#if IS_ENABLED(CONFIG_I2C_MUX)
-	ret = i2c_add_driver(&selftest_i2c_mux_driver);
-	if (selftest(ret == 0,
-			"could not register selftest i2c mux driver\n"))
-		return ret;
-#endif
-
-	return 0;
-}
-
-static void of_selftest_overlay_i2c_cleanup(void)
-{
-#if IS_ENABLED(CONFIG_I2C_MUX)
-	i2c_del_driver(&selftest_i2c_mux_driver);
-#endif
-	platform_driver_unregister(&selftest_i2c_bus_driver);
-	i2c_del_driver(&selftest_i2c_dev_driver);
-}
-
-static void of_selftest_overlay_i2c_12(void)
-{
-	int ret;
-
-	/* device should enable */
-	ret = of_selftest_apply_overlay_check(12, 12, 0, 1, I2C_OVERLAY);
-	if (ret != 0)
-		return;
-
-	selftest(1, "overlay test %d passed\n", 12);
-}
-
-/* test deactivation of device */
-static void of_selftest_overlay_i2c_13(void)
-{
-	int ret;
-
-	/* device should disable */
-	ret = of_selftest_apply_overlay_check(13, 13, 1, 0, I2C_OVERLAY);
-	if (ret != 0)
-		return;
-
-	selftest(1, "overlay test %d passed\n", 13);
-}
-
-/* just check for i2c mux existence */
-static void of_selftest_overlay_i2c_14(void)
-{
-}
-
-static void of_selftest_overlay_i2c_15(void)
-{
-	int ret;
-
-	/* device should enable */
-	ret = of_selftest_apply_overlay_check(16, 15, 0, 1, I2C_OVERLAY);
-	if (ret != 0)
-		return;
-
-	selftest(1, "overlay test %d passed\n", 15);
-}
-
-#else
-
-static inline void of_selftest_overlay_i2c_14(void) { }
-static inline void of_selftest_overlay_i2c_15(void) { }
-
-#endif
-
-static void __init of_selftest_overlay(void)
-{
-	struct device_node *bus_np = NULL;
-	int ret;
-
-	ret = platform_driver_register(&selftest_driver);
-	if (ret != 0) {
-		selftest(0, "could not register selftest driver\n");
-		goto out;
-	}
-
-	bus_np = of_find_node_by_path(bus_path);
-	if (bus_np == NULL) {
-		selftest(0, "could not find bus_path \"%s\"\n", bus_path);
-		goto out;
-	}
-
-	ret = of_platform_populate(bus_np, of_default_bus_match_table,
-			NULL, NULL);
-	if (ret != 0) {
-		selftest(0, "could not populate bus @ \"%s\"\n", bus_path);
-		goto out;
-	}
-
-	if (!of_selftest_device_exists(100, PDEV_OVERLAY)) {
-		selftest(0, "could not find selftest0 @ \"%s\"\n",
-				selftest_path(100, PDEV_OVERLAY));
-		goto out;
-	}
-
-	if (of_selftest_device_exists(101, PDEV_OVERLAY)) {
-		selftest(0, "selftest1 @ \"%s\" should not exist\n",
-				selftest_path(101, PDEV_OVERLAY));
-		goto out;
-	}
-
-	selftest(1, "basic infrastructure of overlays passed");
-
-	/* tests in sequence */
-	of_selftest_overlay_0();
-	of_selftest_overlay_1();
-	of_selftest_overlay_2();
-	of_selftest_overlay_3();
-	of_selftest_overlay_4();
-	of_selftest_overlay_5();
-	of_selftest_overlay_6();
-	of_selftest_overlay_8();
-
-	of_selftest_overlay_10();
-	of_selftest_overlay_11();
-
-#if IS_ENABLED(CONFIG_I2C)
-	if (selftest(of_selftest_overlay_i2c_init() == 0, "i2c init failed\n"))
-		goto out;
-
-	of_selftest_overlay_i2c_12();
-	of_selftest_overlay_i2c_13();
-	of_selftest_overlay_i2c_14();
-	of_selftest_overlay_i2c_15();
-
-	of_selftest_overlay_i2c_cleanup();
-#endif
-
-out:
-	of_node_put(bus_np);
-}
-
-#else
-static inline void __init of_selftest_overlay(void) { }
-#endif
-
-static int __init of_selftest(void)
-{
-	struct device_node *np;
-	int res;
-
-	/* adding data for selftest */
-	res = selftest_data_add();
-	if (res)
-		return res;
-	if (!of_aliases)
-		of_aliases = of_find_node_by_path("/aliases");
-
-	np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
-	if (!np) {
-		pr_info("No testcase data in device tree; not running tests\n");
-		return 0;
-	}
-	of_node_put(np);
-
-	pr_info("start of selftest - you will see error messages\n");
-	of_selftest_check_tree_linkage();
-	of_selftest_check_phandles();
-	of_selftest_find_node_by_name();
-	of_selftest_dynamic();
-	of_selftest_parse_phandle_with_args();
-	of_selftest_property_string();
-	of_selftest_property_copy();
-	of_selftest_changeset();
-	of_selftest_parse_interrupts();
-	of_selftest_parse_interrupts_extended();
-	of_selftest_match_node();
-	of_selftest_platform_populate();
-	of_selftest_overlay();
-
-	/* Double check linkage after removing testcase data */
-	of_selftest_check_tree_linkage();
-
-	pr_info("end of selftest - %i passed, %i failed\n",
-		selftest_results.passed, selftest_results.failed);
-
-	return 0;
-}
-late_initcall(of_selftest);
--
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[Patch v2 2/3] dt: OF_UNITTEST make dependency broken, move unittest.c

[Frank Rowand]

From: Frank Rowand <frank.rowand@sonymobile.com>

Move of_unittest.c into unittest-data/

This is based on v4.0-rc3.

All checkpatch errors are ignored, as this is just a file move.  At least
two of the checkpatch errors appear to be real bugs, to be addressed in
a future patch.

Signed-off-by: Frank Rowand <frank.rowand@sonymobile.com>

---
 drivers/of/unittest-data/unittest.c | 1879 ++++++++++++++++++++++++++++++++++++
 drivers/of/unittest.c               | 1879 ------------------------------------
 2 files changed, 1879 insertions(+), 1879 deletions(-)

Index: b/drivers/of/unittest-data/unittest.c
===================================================================
--- /dev/null
+++ b/drivers/of/unittest-data/unittest.c
@@ -0,0 +1,1879 @@
+/*
+ * Self tests for device tree subsystem
+ */
+
+#define pr_fmt(fmt) "### dt-test ### " fmt
+
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/errno.h>
+#include <linux/hashtable.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_fdt.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/list.h>
+#include <linux/mutex.h>
+#include <linux/slab.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/of_platform.h>
+
+#include <linux/i2c.h>
+#include <linux/i2c-mux.h>
+
+#include "of_private.h"
+
+static struct selftest_results {
+	int passed;
+	int failed;
+} selftest_results;
+
+#define selftest(result, fmt, ...) ({ \
+	bool failed = !(result); \
+	if (failed) { \
+		selftest_results.failed++; \
+		pr_err("FAIL %s():%i " fmt, __func__, __LINE__, ##__VA_ARGS__); \
+	} else { \
+		selftest_results.passed++; \
+		pr_debug("pass %s():%i\n", __func__, __LINE__); \
+	} \
+	failed; \
+})
+
+static void __init of_selftest_find_node_by_name(void)
+{
+	struct device_node *np;
+	const char *options;
+
+	np = of_find_node_by_path("/testcase-data");
+	selftest(np && !strcmp("/testcase-data", np->full_name),
+		"find /testcase-data failed\n");
+	of_node_put(np);
+
+	/* Test if trailing '/' works */
+	np = of_find_node_by_path("/testcase-data/");
+	selftest(!np, "trailing '/' on /testcase-data/ should fail\n");
+
+	np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
+	selftest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", np->full_name),
+		"find /testcase-data/phandle-tests/consumer-a failed\n");
+	of_node_put(np);
+
+	np = of_find_node_by_path("testcase-alias");
+	selftest(np && !strcmp("/testcase-data", np->full_name),
+		"find testcase-alias failed\n");
+	of_node_put(np);
+
+	/* Test if trailing '/' works on aliases */
+	np = of_find_node_by_path("testcase-alias/");
+	selftest(!np, "trailing '/' on testcase-alias/ should fail\n");
+
+	np = of_find_node_by_path("testcase-alias/phandle-tests/consumer-a");
+	selftest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", np->full_name),
+		"find testcase-alias/phandle-tests/consumer-a failed\n");
+	of_node_put(np);
+
+	np = of_find_node_by_path("/testcase-data/missing-path");
+	selftest(!np, "non-existent path returned node %s\n", np->full_name);
+	of_node_put(np);
+
+	np = of_find_node_by_path("missing-alias");
+	selftest(!np, "non-existent alias returned node %s\n", np->full_name);
+	of_node_put(np);
+
+	np = of_find_node_by_path("testcase-alias/missing-path");
+	selftest(!np, "non-existent alias with relative path returned node %s\n", np->full_name);
+	of_node_put(np);
+
+	np = of_find_node_opts_by_path("/testcase-data:testoption", &options);
+	selftest(np && !strcmp("testoption", options),
+		 "option path test failed\n");
+	of_node_put(np);
+
+	np = of_find_node_opts_by_path("/testcase-data:testoption", NULL);
+	selftest(np, "NULL option path test failed\n");
+	of_node_put(np);
+
+	np = of_find_node_opts_by_path("testcase-alias:testaliasoption",
+				       &options);
+	selftest(np && !strcmp("testaliasoption", options),
+		 "option alias path test failed\n");
+	of_node_put(np);
+
+	np = of_find_node_opts_by_path("testcase-alias:testaliasoption", NULL);
+	selftest(np, "NULL option alias path test failed\n");
+	of_node_put(np);
+
+	options = "testoption";
+	np = of_find_node_opts_by_path("testcase-alias", &options);
+	selftest(np && !options, "option clearing test failed\n");
+	of_node_put(np);
+
+	options = "testoption";
+	np = of_find_node_opts_by_path("/", &options);
+	selftest(np && !options, "option clearing root node test failed\n");
+	of_node_put(np);
+}
+
+static void __init of_selftest_dynamic(void)
+{
+	struct device_node *np;
+	struct property *prop;
+
+	np = of_find_node_by_path("/testcase-data");
+	if (!np) {
+		pr_err("missing testcase data\n");
+		return;
+	}
+
+	/* Array of 4 properties for the purpose of testing */
+	prop = kzalloc(sizeof(*prop) * 4, GFP_KERNEL);
+	if (!prop) {
+		selftest(0, "kzalloc() failed\n");
+		return;
+	}
+
+	/* Add a new property - should pass*/
+	prop->name = "new-property";
+	prop->value = "new-property-data";
+	prop->length = strlen(prop->value);
+	selftest(of_add_property(np, prop) == 0, "Adding a new property failed\n");
+
+	/* Try to add an existing property - should fail */
+	prop++;
+	prop->name = "new-property";
+	prop->value = "new-property-data-should-fail";
+	prop->length = strlen(prop->value);
+	selftest(of_add_property(np, prop) != 0,
+		 "Adding an existing property should have failed\n");
+
+	/* Try to modify an existing property - should pass */
+	prop->value = "modify-property-data-should-pass";
+	prop->length = strlen(prop->value);
+	selftest(of_update_property(np, prop) == 0,
+		 "Updating an existing property should have passed\n");
+
+	/* Try to modify non-existent property - should pass*/
+	prop++;
+	prop->name = "modify-property";
+	prop->value = "modify-missing-property-data-should-pass";
+	prop->length = strlen(prop->value);
+	selftest(of_update_property(np, prop) == 0,
+		 "Updating a missing property should have passed\n");
+
+	/* Remove property - should pass */
+	selftest(of_remove_property(np, prop) == 0,
+		 "Removing a property should have passed\n");
+
+	/* Adding very large property - should pass */
+	prop++;
+	prop->name = "large-property-PAGE_SIZEx8";
+	prop->length = PAGE_SIZE * 8;
+	prop->value = kzalloc(prop->length, GFP_KERNEL);
+	selftest(prop->value != NULL, "Unable to allocate large buffer\n");
+	if (prop->value)
+		selftest(of_add_property(np, prop) == 0,
+			 "Adding a large property should have passed\n");
+}
+
+static int __init of_selftest_check_node_linkage(struct device_node *np)
+{
+	struct device_node *child;
+	int count = 0, rc;
+
+	for_each_child_of_node(np, child) {
+		if (child->parent != np) {
+			pr_err("Child node %s links to wrong parent %s\n",
+				 child->name, np->name);
+			return -EINVAL;
+		}
+
+		rc = of_selftest_check_node_linkage(child);
+		if (rc < 0)
+			return rc;
+		count += rc;
+	}
+
+	return count + 1;
+}
+
+static void __init of_selftest_check_tree_linkage(void)
+{
+	struct device_node *np;
+	int allnode_count = 0, child_count;
+
+	if (!of_root)
+		return;
+
+	for_each_of_allnodes(np)
+		allnode_count++;
+	child_count = of_selftest_check_node_linkage(of_root);
+
+	selftest(child_count > 0, "Device node data structure is corrupted\n");
+	selftest(child_count == allnode_count, "allnodes list size (%i) doesn't match"
+		 "sibling lists size (%i)\n", allnode_count, child_count);
+	pr_debug("allnodes list size (%i); sibling lists size (%i)\n", allnode_count, child_count);
+}
+
+struct node_hash {
+	struct hlist_node node;
+	struct device_node *np;
+};
+
+static DEFINE_HASHTABLE(phandle_ht, 8);
+static void __init of_selftest_check_phandles(void)
+{
+	struct device_node *np;
+	struct node_hash *nh;
+	struct hlist_node *tmp;
+	int i, dup_count = 0, phandle_count = 0;
+
+	for_each_of_allnodes(np) {
+		if (!np->phandle)
+			continue;
+
+		hash_for_each_possible(phandle_ht, nh, node, np->phandle) {
+			if (nh->np->phandle == np->phandle) {
+				pr_info("Duplicate phandle! %i used by %s and %s\n",
+					np->phandle, nh->np->full_name, np->full_name);
+				dup_count++;
+				break;
+			}
+		}
+
+		nh = kzalloc(sizeof(*nh), GFP_KERNEL);
+		if (WARN_ON(!nh))
+			return;
+
+		nh->np = np;
+		hash_add(phandle_ht, &nh->node, np->phandle);
+		phandle_count++;
+	}
+	selftest(dup_count == 0, "Found %i duplicates in %i phandles\n",
+		 dup_count, phandle_count);
+
+	/* Clean up */
+	hash_for_each_safe(phandle_ht, i, tmp, nh, node) {
+		hash_del(&nh->node);
+		kfree(nh);
+	}
+}
+
+static void __init of_selftest_parse_phandle_with_args(void)
+{
+	struct device_node *np;
+	struct of_phandle_args args;
+	int i, rc;
+
+	np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
+	if (!np) {
+		pr_err("missing testcase data\n");
+		return;
+	}
+
+	rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells");
+	selftest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc);
+
+	for (i = 0; i < 8; i++) {
+		bool passed = true;
+		rc = of_parse_phandle_with_args(np, "phandle-list",
+						"#phandle-cells", i, &args);
+
+		/* Test the values from tests-phandle.dtsi */
+		switch (i) {
+		case 0:
+			passed &= !rc;
+			passed &= (args.args_count == 1);
+			passed &= (args.args[0] == (i + 1));
+			break;
+		case 1:
+			passed &= !rc;
+			passed &= (args.args_count == 2);
+			passed &= (args.args[0] == (i + 1));
+			passed &= (args.args[1] == 0);
+			break;
+		case 2:
+			passed &= (rc == -ENOENT);
+			break;
+		case 3:
+			passed &= !rc;
+			passed &= (args.args_count == 3);
+			passed &= (args.args[0] == (i + 1));
+			passed &= (args.args[1] == 4);
+			passed &= (args.args[2] == 3);
+			break;
+		case 4:
+			passed &= !rc;
+			passed &= (args.args_count == 2);
+			passed &= (args.args[0] == (i + 1));
+			passed &= (args.args[1] == 100);
+			break;
+		case 5:
+			passed &= !rc;
+			passed &= (args.args_count == 0);
+			break;
+		case 6:
+			passed &= !rc;
+			passed &= (args.args_count == 1);
+			passed &= (args.args[0] == (i + 1));
+			break;
+		case 7:
+			passed &= (rc == -ENOENT);
+			break;
+		default:
+			passed = false;
+		}
+
+		selftest(passed, "index %i - data error on node %s rc=%i\n",
+			 i, args.np->full_name, rc);
+	}
+
+	/* Check for missing list property */
+	rc = of_parse_phandle_with_args(np, "phandle-list-missing",
+					"#phandle-cells", 0, &args);
+	selftest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
+	rc = of_count_phandle_with_args(np, "phandle-list-missing",
+					"#phandle-cells");
+	selftest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
+
+	/* Check for missing cells property */
+	rc = of_parse_phandle_with_args(np, "phandle-list",
+					"#phandle-cells-missing", 0, &args);
+	selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
+	rc = of_count_phandle_with_args(np, "phandle-list",
+					"#phandle-cells-missing");
+	selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
+
+	/* Check for bad phandle in list */
+	rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle",
+					"#phandle-cells", 0, &args);
+	selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
+	rc = of_count_phandle_with_args(np, "phandle-list-bad-phandle",
+					"#phandle-cells");
+	selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
+
+	/* Check for incorrectly formed argument list */
+	rc = of_parse_phandle_with_args(np, "phandle-list-bad-args",
+					"#phandle-cells", 1, &args);
+	selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
+	rc = of_count_phandle_with_args(np, "phandle-list-bad-args",
+					"#phandle-cells");
+	selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
+}
+
+static void __init of_selftest_property_string(void)
+{
+	const char *strings[4];
+	struct device_node *np;
+	int rc;
+
+	np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
+	if (!np) {
+		pr_err("No testcase data in device tree\n");
+		return;
+	}
+
+	rc = of_property_match_string(np, "phandle-list-names", "first");
+	selftest(rc == 0, "first expected:0 got:%i\n", rc);
+	rc = of_property_match_string(np, "phandle-list-names", "second");
+	selftest(rc == 1, "second expected:0 got:%i\n", rc);
+	rc = of_property_match_string(np, "phandle-list-names", "third");
+	selftest(rc == 2, "third expected:0 got:%i\n", rc);
+	rc = of_property_match_string(np, "phandle-list-names", "fourth");
+	selftest(rc == -ENODATA, "unmatched string; rc=%i\n", rc);
+	rc = of_property_match_string(np, "missing-property", "blah");
+	selftest(rc == -EINVAL, "missing property; rc=%i\n", rc);
+	rc = of_property_match_string(np, "empty-property", "blah");
+	selftest(rc == -ENODATA, "empty property; rc=%i\n", rc);
+	rc = of_property_match_string(np, "unterminated-string", "blah");
+	selftest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
+
+	/* of_property_count_strings() tests */
+	rc = of_property_count_strings(np, "string-property");
+	selftest(rc == 1, "Incorrect string count; rc=%i\n", rc);
+	rc = of_property_count_strings(np, "phandle-list-names");
+	selftest(rc == 3, "Incorrect string count; rc=%i\n", rc);
+	rc = of_property_count_strings(np, "unterminated-string");
+	selftest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
+	rc = of_property_count_strings(np, "unterminated-string-list");
+	selftest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
+
+	/* of_property_read_string_index() tests */
+	rc = of_property_read_string_index(np, "string-property", 0, strings);
+	selftest(rc == 0 && !strcmp(strings[0], "foobar"), "of_property_read_string_index() failure; rc=%i\n", rc);
+	strings[0] = NULL;
+	rc = of_property_read_string_index(np, "string-property", 1, strings);
+	selftest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
+	rc = of_property_read_string_index(np, "phandle-list-names", 0, strings);
+	selftest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
+	rc = of_property_read_string_index(np, "phandle-list-names", 1, strings);
+	selftest(rc == 0 && !strcmp(strings[0], "second"), "of_property_read_string_index() failure; rc=%i\n", rc);
+	rc = of_property_read_string_index(np, "phandle-list-names", 2, strings);
+	selftest(rc == 0 && !strcmp(strings[0], "third"), "of_property_read_string_index() failure; rc=%i\n", rc);
+	strings[0] = NULL;
+	rc = of_property_read_string_index(np, "phandle-list-names", 3, strings);
+	selftest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
+	strings[0] = NULL;
+	rc = of_property_read_string_index(np, "unterminated-string", 0, strings);
+	selftest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
+	rc = of_property_read_string_index(np, "unterminated-string-list", 0, strings);
+	selftest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
+	strings[0] = NULL;
+	rc = of_property_read_string_index(np, "unterminated-string-list", 2, strings); /* should fail */
+	selftest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
+	strings[1] = NULL;
+
+	/* of_property_read_string_array() tests */
+	rc = of_property_read_string_array(np, "string-property", strings, 4);
+	selftest(rc == 1, "Incorrect string count; rc=%i\n", rc);
+	rc = of_property_read_string_array(np, "phandle-list-names", strings, 4);
+	selftest(rc == 3, "Incorrect string count; rc=%i\n", rc);
+	rc = of_property_read_string_array(np, "unterminated-string", strings, 4);
+	selftest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
+	/* -- An incorrectly formed string should cause a failure */
+	rc = of_property_read_string_array(np, "unterminated-string-list", strings, 4);
+	selftest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
+	/* -- parsing the correctly formed strings should still work: */
+	strings[2] = NULL;
+	rc = of_property_read_string_array(np, "unterminated-string-list", strings, 2);
+	selftest(rc == 2 && strings[2] == NULL, "of_property_read_string_array() failure; rc=%i\n", rc);
+	strings[1] = NULL;
+	rc = of_property_read_string_array(np, "phandle-list-names", strings, 1);
+	selftest(rc == 1 && strings[1] == NULL, "Overwrote end of string array; rc=%i, str='%s'\n", rc, strings[1]);
+}
+
+#define propcmp(p1, p2) (((p1)->length == (p2)->length) && \
+			(p1)->value && (p2)->value && \
+			!memcmp((p1)->value, (p2)->value, (p1)->length) && \
+			!strcmp((p1)->name, (p2)->name))
+static void __init of_selftest_property_copy(void)
+{
+#ifdef CONFIG_OF_DYNAMIC
+	struct property p1 = { .name = "p1", .length = 0, .value = "" };
+	struct property p2 = { .name = "p2", .length = 5, .value = "abcd" };
+	struct property *new;
+
+	new = __of_prop_dup(&p1, GFP_KERNEL);
+	selftest(new && propcmp(&p1, new), "empty property didn't copy correctly\n");
+	kfree(new->value);
+	kfree(new->name);
+	kfree(new);
+
+	new = __of_prop_dup(&p2, GFP_KERNEL);
+	selftest(new && propcmp(&p2, new), "non-empty property didn't copy correctly\n");
+	kfree(new->value);
+	kfree(new->name);
+	kfree(new);
+#endif
+}
+
+static void __init of_selftest_changeset(void)
+{
+#ifdef CONFIG_OF_DYNAMIC
+	struct property *ppadd, padd = { .name = "prop-add", .length = 0, .value = "" };
+	struct property *ppupdate, pupdate = { .name = "prop-update", .length = 5, .value = "abcd" };
+	struct property *ppremove;
+	struct device_node *n1, *n2, *n21, *nremove, *parent, *np;
+	struct of_changeset chgset;
+
+	of_changeset_init(&chgset);
+	n1 = __of_node_dup(NULL, "/testcase-data/changeset/n1");
+	selftest(n1, "testcase setup failure\n");
+	n2 = __of_node_dup(NULL, "/testcase-data/changeset/n2");
+	selftest(n2, "testcase setup failure\n");
+	n21 = __of_node_dup(NULL, "%s/%s", "/testcase-data/changeset/n2", "n21");
+	selftest(n21, "testcase setup failure %p\n", n21);
+	nremove = of_find_node_by_path("/testcase-data/changeset/node-remove");
+	selftest(nremove, "testcase setup failure\n");
+	ppadd = __of_prop_dup(&padd, GFP_KERNEL);
+	selftest(ppadd, "testcase setup failure\n");
+	ppupdate = __of_prop_dup(&pupdate, GFP_KERNEL);
+	selftest(ppupdate, "testcase setup failure\n");
+	parent = nremove->parent;
+	n1->parent = parent;
+	n2->parent = parent;
+	n21->parent = n2;
+	n2->child = n21;
+	ppremove = of_find_property(parent, "prop-remove", NULL);
+	selftest(ppremove, "failed to find removal prop");
+
+	of_changeset_init(&chgset);
+	selftest(!of_changeset_attach_node(&chgset, n1), "fail attach n1\n");
+	selftest(!of_changeset_attach_node(&chgset, n2), "fail attach n2\n");
+	selftest(!of_changeset_detach_node(&chgset, nremove), "fail remove node\n");
+	selftest(!of_changeset_attach_node(&chgset, n21), "fail attach n21\n");
+	selftest(!of_changeset_add_property(&chgset, parent, ppadd), "fail add prop\n");
+	selftest(!of_changeset_update_property(&chgset, parent, ppupdate), "fail update prop\n");
+	selftest(!of_changeset_remove_property(&chgset, parent, ppremove), "fail remove prop\n");
+	mutex_lock(&of_mutex);
+	selftest(!of_changeset_apply(&chgset), "apply failed\n");
+	mutex_unlock(&of_mutex);
+
+	/* Make sure node names are constructed correctly */
+	selftest((np = of_find_node_by_path("/testcase-data/changeset/n2/n21")),
+		 "'%s' not added\n", n21->full_name);
+	of_node_put(np);
+
+	mutex_lock(&of_mutex);
+	selftest(!of_changeset_revert(&chgset), "revert failed\n");
+	mutex_unlock(&of_mutex);
+
+	of_changeset_destroy(&chgset);
+#endif
+}
+
+static void __init of_selftest_parse_interrupts(void)
+{
+	struct device_node *np;
+	struct of_phandle_args args;
+	int i, rc;
+
+	np = of_find_node_by_path("/testcase-data/interrupts/interrupts0");
+	if (!np) {
+		pr_err("missing testcase data\n");
+		return;
+	}
+
+	for (i = 0; i < 4; i++) {
+		bool passed = true;
+		args.args_count = 0;
+		rc = of_irq_parse_one(np, i, &args);
+
+		passed &= !rc;
+		passed &= (args.args_count == 1);
+		passed &= (args.args[0] == (i + 1));
+
+		selftest(passed, "index %i - data error on node %s rc=%i\n",
+			 i, args.np->full_name, rc);
+	}
+	of_node_put(np);
+
+	np = of_find_node_by_path("/testcase-data/interrupts/interrupts1");
+	if (!np) {
+		pr_err("missing testcase data\n");
+		return;
+	}
+
+	for (i = 0; i < 4; i++) {
+		bool passed = true;
+		args.args_count = 0;
+		rc = of_irq_parse_one(np, i, &args);
+
+		/* Test the values from tests-phandle.dtsi */
+		switch (i) {
+		case 0:
+			passed &= !rc;
+			passed &= (args.args_count == 1);
+			passed &= (args.args[0] == 9);
+			break;
+		case 1:
+			passed &= !rc;
+			passed &= (args.args_count == 3);
+			passed &= (args.args[0] == 10);
+			passed &= (args.args[1] == 11);
+			passed &= (args.args[2] == 12);
+			break;
+		case 2:
+			passed &= !rc;
+			passed &= (args.args_count == 2);
+			passed &= (args.args[0] == 13);
+			passed &= (args.args[1] == 14);
+			break;
+		case 3:
+			passed &= !rc;
+			passed &= (args.args_count == 2);
+			passed &= (args.args[0] == 15);
+			passed &= (args.args[1] == 16);
+			break;
+		default:
+			passed = false;
+		}
+		selftest(passed, "index %i - data error on node %s rc=%i\n",
+			 i, args.np->full_name, rc);
+	}
+	of_node_put(np);
+}
+
+static void __init of_selftest_parse_interrupts_extended(void)
+{
+	struct device_node *np;
+	struct of_phandle_args args;
+	int i, rc;
+
+	np = of_find_node_by_path("/testcase-data/interrupts/interrupts-extended0");
+	if (!np) {
+		pr_err("missing testcase data\n");
+		return;
+	}
+
+	for (i = 0; i < 7; i++) {
+		bool passed = true;
+		rc = of_irq_parse_one(np, i, &args);
+
+		/* Test the values from tests-phandle.dtsi */
+		switch (i) {
+		case 0:
+			passed &= !rc;
+			passed &= (args.args_count == 1);
+			passed &= (args.args[0] == 1);
+			break;
+		case 1:
+			passed &= !rc;
+			passed &= (args.args_count == 3);
+			passed &= (args.args[0] == 2);
+			passed &= (args.args[1] == 3);
+			passed &= (args.args[2] == 4);
+			break;
+		case 2:
+			passed &= !rc;
+			passed &= (args.args_count == 2);
+			passed &= (args.args[0] == 5);
+			passed &= (args.args[1] == 6);
+			break;
+		case 3:
+			passed &= !rc;
+			passed &= (args.args_count == 1);
+			passed &= (args.args[0] == 9);
+			break;
+		case 4:
+			passed &= !rc;
+			passed &= (args.args_count == 3);
+			passed &= (args.args[0] == 10);
+			passed &= (args.args[1] == 11);
+			passed &= (args.args[2] == 12);
+			break;
+		case 5:
+			passed &= !rc;
+			passed &= (args.args_count == 2);
+			passed &= (args.args[0] == 13);
+			passed &= (args.args[1] == 14);
+			break;
+		case 6:
+			passed &= !rc;
+			passed &= (args.args_count == 1);
+			passed &= (args.args[0] == 15);
+			break;
+		default:
+			passed = false;
+		}
+
+		selftest(passed, "index %i - data error on node %s rc=%i\n",
+			 i, args.np->full_name, rc);
+	}
+	of_node_put(np);
+}
+
+static struct of_device_id match_node_table[] = {
+	{ .data = "A", .name = "name0", }, /* Name alone is lowest priority */
+	{ .data = "B", .type = "type1", }, /* followed by type alone */
+
+	{ .data = "Ca", .name = "name2", .type = "type1", }, /* followed by both together */
+	{ .data = "Cb", .name = "name2", }, /* Only match when type doesn't match */
+	{ .data = "Cc", .name = "name2", .type = "type2", },
+
+	{ .data = "E", .compatible = "compat3" },
+	{ .data = "G", .compatible = "compat2", },
+	{ .data = "H", .compatible = "compat2", .name = "name5", },
+	{ .data = "I", .compatible = "compat2", .type = "type1", },
+	{ .data = "J", .compatible = "compat2", .type = "type1", .name = "name8", },
+	{ .data = "K", .compatible = "compat2", .name = "name9", },
+	{}
+};
+
+static struct {
+	const char *path;
+	const char *data;
+} match_node_tests[] = {
+	{ .path = "/testcase-data/match-node/name0", .data = "A", },
+	{ .path = "/testcase-data/match-node/name1", .data = "B", },
+	{ .path = "/testcase-data/match-node/a/name2", .data = "Ca", },
+	{ .path = "/testcase-data/match-node/b/name2", .data = "Cb", },
+	{ .path = "/testcase-data/match-node/c/name2", .data = "Cc", },
+	{ .path = "/testcase-data/match-node/name3", .data = "E", },
+	{ .path = "/testcase-data/match-node/name4", .data = "G", },
+	{ .path = "/testcase-data/match-node/name5", .data = "H", },
+	{ .path = "/testcase-data/match-node/name6", .data = "G", },
+	{ .path = "/testcase-data/match-node/name7", .data = "I", },
+	{ .path = "/testcase-data/match-node/name8", .data = "J", },
+	{ .path = "/testcase-data/match-node/name9", .data = "K", },
+};
+
+static void __init of_selftest_match_node(void)
+{
+	struct device_node *np;
+	const struct of_device_id *match;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(match_node_tests); i++) {
+		np = of_find_node_by_path(match_node_tests[i].path);
+		if (!np) {
+			selftest(0, "missing testcase node %s\n",
+				match_node_tests[i].path);
+			continue;
+		}
+
+		match = of_match_node(match_node_table, np);
+		if (!match) {
+			selftest(0, "%s didn't match anything\n",
+				match_node_tests[i].path);
+			continue;
+		}
+
+		if (strcmp(match->data, match_node_tests[i].data) != 0) {
+			selftest(0, "%s got wrong match. expected %s, got %s\n",
+				match_node_tests[i].path, match_node_tests[i].data,
+				(const char *)match->data);
+			continue;
+		}
+		selftest(1, "passed");
+	}
+}
+
+struct device test_bus = {
+	.init_name = "unittest-bus",
+};
+static void __init of_selftest_platform_populate(void)
+{
+	int irq, rc;
+	struct device_node *np, *child, *grandchild;
+	struct platform_device *pdev;
+	struct of_device_id match[] = {
+		{ .compatible = "test-device", },
+		{}
+	};
+
+	np = of_find_node_by_path("/testcase-data");
+	of_platform_populate(np, of_default_bus_match_table, NULL, NULL);
+
+	/* Test that a missing irq domain returns -EPROBE_DEFER */
+	np = of_find_node_by_path("/testcase-data/testcase-device1");
+	pdev = of_find_device_by_node(np);
+	selftest(pdev, "device 1 creation failed\n");
+
+	irq = platform_get_irq(pdev, 0);
+	selftest(irq == -EPROBE_DEFER, "device deferred probe failed - %d\n", irq);
+
+	/* Test that a parsing failure does not return -EPROBE_DEFER */
+	np = of_find_node_by_path("/testcase-data/testcase-device2");
+	pdev = of_find_device_by_node(np);
+	selftest(pdev, "device 2 creation failed\n");
+	irq = platform_get_irq(pdev, 0);
+	selftest(irq < 0 && irq != -EPROBE_DEFER, "device parsing error failed - %d\n", irq);
+
+	if (selftest(np = of_find_node_by_path("/testcase-data/platform-tests"),
+		     "No testcase data in device tree\n"));
+		return;
+
+	if (selftest(!(rc = device_register(&test_bus)),
+		     "testbus registration failed; rc=%i\n", rc));
+		return;
+
+	for_each_child_of_node(np, child) {
+		of_platform_populate(child, match, NULL, &test_bus);
+		for_each_child_of_node(child, grandchild)
+			selftest(of_find_device_by_node(grandchild),
+				 "Could not create device for node '%s'\n",
+				 grandchild->name);
+	}
+
+	of_platform_depopulate(&test_bus);
+	for_each_child_of_node(np, child) {
+		for_each_child_of_node(child, grandchild)
+			selftest(!of_find_device_by_node(grandchild),
+				 "device didn't get destroyed '%s'\n",
+				 grandchild->name);
+	}
+
+	device_unregister(&test_bus);
+	of_node_put(np);
+}
+
+/**
+ *	update_node_properties - adds the properties
+ *	of np into dup node (present in live tree) and
+ *	updates parent of children of np to dup.
+ *
+ *	@np:	node already present in live tree
+ *	@dup:	node present in live tree to be updated
+ */
+static void update_node_properties(struct device_node *np,
+					struct device_node *dup)
+{
+	struct property *prop;
+	struct device_node *child;
+
+	for_each_property_of_node(np, prop)
+		of_add_property(dup, prop);
+
+	for_each_child_of_node(np, child)
+		child->parent = dup;
+}
+
+/**
+ *	attach_node_and_children - attaches nodes
+ *	and its children to live tree
+ *
+ *	@np:	Node to attach to live tree
+ */
+static int attach_node_and_children(struct device_node *np)
+{
+	struct device_node *next, *dup, *child;
+	unsigned long flags;
+
+	dup = of_find_node_by_path(np->full_name);
+	if (dup) {
+		update_node_properties(np, dup);
+		return 0;
+	}
+
+	child = np->child;
+	np->child = NULL;
+
+	mutex_lock(&of_mutex);
+	raw_spin_lock_irqsave(&devtree_lock, flags);
+	np->sibling = np->parent->child;
+	np->parent->child = np;
+	of_node_clear_flag(np, OF_DETACHED);
+	raw_spin_unlock_irqrestore(&devtree_lock, flags);
+
+	__of_attach_node_sysfs(np);
+	mutex_unlock(&of_mutex);
+
+	while (child) {
+		next = child->sibling;
+		attach_node_and_children(child);
+		child = next;
+	}
+
+	return 0;
+}
+
+/**
+ *	selftest_data_add - Reads, copies data from
+ *	linked tree and attaches it to the live tree
+ */
+static int __init selftest_data_add(void)
+{
+	void *selftest_data;
+	struct device_node *selftest_data_node, *np;
+	extern uint8_t __dtb_testcases_begin[];
+	extern uint8_t __dtb_testcases_end[];
+	const int size = __dtb_testcases_end - __dtb_testcases_begin;
+	int rc;
+
+	if (!size) {
+		pr_warn("%s: No testcase data to attach; not running tests\n",
+			__func__);
+		return -ENODATA;
+	}
+
+	/* creating copy */
+	selftest_data = kmemdup(__dtb_testcases_begin, size, GFP_KERNEL);
+
+	if (!selftest_data) {
+		pr_warn("%s: Failed to allocate memory for selftest_data; "
+			"not running tests\n", __func__);
+		return -ENOMEM;
+	}
+	of_fdt_unflatten_tree(selftest_data, &selftest_data_node);
+	if (!selftest_data_node) {
+		pr_warn("%s: No tree to attach; not running tests\n", __func__);
+		return -ENODATA;
+	}
+	of_node_set_flag(selftest_data_node, OF_DETACHED);
+	rc = of_resolve_phandles(selftest_data_node);
+	if (rc) {
+		pr_err("%s: Failed to resolve phandles (rc=%i)\n", __func__, rc);
+		return -EINVAL;
+	}
+
+	if (!of_root) {
+		of_root = selftest_data_node;
+		for_each_of_allnodes(np)
+			__of_attach_node_sysfs(np);
+		of_aliases = of_find_node_by_path("/aliases");
+		of_chosen = of_find_node_by_path("/chosen");
+		return 0;
+	}
+
+	/* attach the sub-tree to live tree */
+	np = selftest_data_node->child;
+	while (np) {
+		struct device_node *next = np->sibling;
+		np->parent = of_root;
+		attach_node_and_children(np);
+		np = next;
+	}
+	return 0;
+}
+
+#ifdef CONFIG_OF_OVERLAY
+
+static int selftest_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+
+	if (np == NULL) {
+		dev_err(dev, "No OF data for device\n");
+		return -EINVAL;
+
+	}
+
+	dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
+
+	of_platform_populate(np, NULL, NULL, &pdev->dev);
+
+	return 0;
+}
+
+static int selftest_remove(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+
+	dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
+	return 0;
+}
+
+static struct of_device_id selftest_match[] = {
+	{ .compatible = "selftest", },
+	{},
+};
+
+static struct platform_driver selftest_driver = {
+	.probe			= selftest_probe,
+	.remove			= selftest_remove,
+	.driver = {
+		.name		= "selftest",
+		.owner		= THIS_MODULE,
+		.of_match_table	= of_match_ptr(selftest_match),
+	},
+};
+
+/* get the platform device instantiated at the path */
+static struct platform_device *of_path_to_platform_device(const char *path)
+{
+	struct device_node *np;
+	struct platform_device *pdev;
+
+	np = of_find_node_by_path(path);
+	if (np == NULL)
+		return NULL;
+
+	pdev = of_find_device_by_node(np);
+	of_node_put(np);
+
+	return pdev;
+}
+
+/* find out if a platform device exists at that path */
+static int of_path_platform_device_exists(const char *path)
+{
+	struct platform_device *pdev;
+
+	pdev = of_path_to_platform_device(path);
+	platform_device_put(pdev);
+	return pdev != NULL;
+}
+
+#if IS_ENABLED(CONFIG_I2C)
+
+/* get the i2c client device instantiated at the path */
+static struct i2c_client *of_path_to_i2c_client(const char *path)
+{
+	struct device_node *np;
+	struct i2c_client *client;
+
+	np = of_find_node_by_path(path);
+	if (np == NULL)
+		return NULL;
+
+	client = of_find_i2c_device_by_node(np);
+	of_node_put(np);
+
+	return client;
+}
+
+/* find out if a i2c client device exists at that path */
+static int of_path_i2c_client_exists(const char *path)
+{
+	struct i2c_client *client;
+
+	client = of_path_to_i2c_client(path);
+	if (client)
+		put_device(&client->dev);
+	return client != NULL;
+}
+#else
+static int of_path_i2c_client_exists(const char *path)
+{
+	return 0;
+}
+#endif
+
+enum overlay_type {
+	PDEV_OVERLAY,
+	I2C_OVERLAY
+};
+
+static int of_path_device_type_exists(const char *path,
+		enum overlay_type ovtype)
+{
+	switch (ovtype) {
+	case PDEV_OVERLAY:
+		return of_path_platform_device_exists(path);
+	case I2C_OVERLAY:
+		return of_path_i2c_client_exists(path);
+	}
+	return 0;
+}
+
+static const char *selftest_path(int nr, enum overlay_type ovtype)
+{
+	const char *base;
+	static char buf[256];
+
+	switch (ovtype) {
+	case PDEV_OVERLAY:
+		base = "/testcase-data/overlay-node/test-bus";
+		break;
+	case I2C_OVERLAY:
+		base = "/testcase-data/overlay-node/test-bus/i2c-test-bus";
+		break;
+	default:
+		buf[0] = '\0';
+		return buf;
+	}
+	snprintf(buf, sizeof(buf) - 1, "%s/test-selftest%d", base, nr);
+	buf[sizeof(buf) - 1] = '\0';
+	return buf;
+}
+
+static int of_selftest_device_exists(int selftest_nr, enum overlay_type ovtype)
+{
+	const char *path;
+
+	path = selftest_path(selftest_nr, ovtype);
+
+	switch (ovtype) {
+	case PDEV_OVERLAY:
+		return of_path_platform_device_exists(path);
+	case I2C_OVERLAY:
+		return of_path_i2c_client_exists(path);
+	}
+	return 0;
+}
+
+static const char *overlay_path(int nr)
+{
+	static char buf[256];
+
+	snprintf(buf, sizeof(buf) - 1,
+		"/testcase-data/overlay%d", nr);
+	buf[sizeof(buf) - 1] = '\0';
+
+	return buf;
+}
+
+static const char *bus_path = "/testcase-data/overlay-node/test-bus";
+
+static int of_selftest_apply_overlay(int selftest_nr, int overlay_nr,
+		int *overlay_id)
+{
+	struct device_node *np = NULL;
+	int ret, id = -1;
+
+	np = of_find_node_by_path(overlay_path(overlay_nr));
+	if (np == NULL) {
+		selftest(0, "could not find overlay node @\"%s\"\n",
+				overlay_path(overlay_nr));
+		ret = -EINVAL;
+		goto out;
+	}
+
+	ret = of_overlay_create(np);
+	if (ret < 0) {
+		selftest(0, "could not create overlay from \"%s\"\n",
+				overlay_path(overlay_nr));
+		goto out;
+	}
+	id = ret;
+
+	ret = 0;
+
+out:
+	of_node_put(np);
+
+	if (overlay_id)
+		*overlay_id = id;
+
+	return ret;
+}
+
+/* apply an overlay while checking before and after states */
+static int of_selftest_apply_overlay_check(int overlay_nr, int selftest_nr,
+		int before, int after, enum overlay_type ovtype)
+{
+	int ret;
+
+	/* selftest device must not be in before state */
+	if (of_selftest_device_exists(selftest_nr, ovtype) != before) {
+		selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
+				overlay_path(overlay_nr),
+				selftest_path(selftest_nr, ovtype),
+				!before ? "enabled" : "disabled");
+		return -EINVAL;
+	}
+
+	ret = of_selftest_apply_overlay(overlay_nr, selftest_nr, NULL);
+	if (ret != 0) {
+		/* of_selftest_apply_overlay already called selftest() */
+		return ret;
+	}
+
+	/* selftest device must be to set to after state */
+	if (of_selftest_device_exists(selftest_nr, ovtype) != after) {
+		selftest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n",
+				overlay_path(overlay_nr),
+				selftest_path(selftest_nr, ovtype),
+				!after ? "enabled" : "disabled");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+/* apply an overlay and then revert it while checking before, after states */
+static int of_selftest_apply_revert_overlay_check(int overlay_nr,
+		int selftest_nr, int before, int after,
+		enum overlay_type ovtype)
+{
+	int ret, ov_id;
+
+	/* selftest device must be in before state */
+	if (of_selftest_device_exists(selftest_nr, ovtype) != before) {
+		selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
+				overlay_path(overlay_nr),
+				selftest_path(selftest_nr, ovtype),
+				!before ? "enabled" : "disabled");
+		return -EINVAL;
+	}
+
+	/* apply the overlay */
+	ret = of_selftest_apply_overlay(overlay_nr, selftest_nr, &ov_id);
+	if (ret != 0) {
+		/* of_selftest_apply_overlay already called selftest() */
+		return ret;
+	}
+
+	/* selftest device must be in after state */
+	if (of_selftest_device_exists(selftest_nr, ovtype) != after) {
+		selftest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n",
+				overlay_path(overlay_nr),
+				selftest_path(selftest_nr, ovtype),
+				!after ? "enabled" : "disabled");
+		return -EINVAL;
+	}
+
+	ret = of_overlay_destroy(ov_id);
+	if (ret != 0) {
+		selftest(0, "overlay @\"%s\" failed to be destroyed @\"%s\"\n",
+				overlay_path(overlay_nr),
+				selftest_path(selftest_nr, ovtype));
+		return ret;
+	}
+
+	/* selftest device must be again in before state */
+	if (of_selftest_device_exists(selftest_nr, PDEV_OVERLAY) != before) {
+		selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
+				overlay_path(overlay_nr),
+				selftest_path(selftest_nr, ovtype),
+				!before ? "enabled" : "disabled");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+/* test activation of device */
+static void of_selftest_overlay_0(void)
+{
+	int ret;
+
+	/* device should enable */
+	ret = of_selftest_apply_overlay_check(0, 0, 0, 1, PDEV_OVERLAY);
+	if (ret != 0)
+		return;
+
+	selftest(1, "overlay test %d passed\n", 0);
+}
+
+/* test deactivation of device */
+static void of_selftest_overlay_1(void)
+{
+	int ret;
+
+	/* device should disable */
+	ret = of_selftest_apply_overlay_check(1, 1, 1, 0, PDEV_OVERLAY);
+	if (ret != 0)
+		return;
+
+	selftest(1, "overlay test %d passed\n", 1);
+}
+
+/* test activation of device */
+static void of_selftest_overlay_2(void)
+{
+	int ret;
+
+	/* device should enable */
+	ret = of_selftest_apply_overlay_check(2, 2, 0, 1, PDEV_OVERLAY);
+	if (ret != 0)
+		return;
+
+	selftest(1, "overlay test %d passed\n", 2);
+}
+
+/* test deactivation of device */
+static void of_selftest_overlay_3(void)
+{
+	int ret;
+
+	/* device should disable */
+	ret = of_selftest_apply_overlay_check(3, 3, 1, 0, PDEV_OVERLAY);
+	if (ret != 0)
+		return;
+
+	selftest(1, "overlay test %d passed\n", 3);
+}
+
+/* test activation of a full device node */
+static void of_selftest_overlay_4(void)
+{
+	int ret;
+
+	/* device should disable */
+	ret = of_selftest_apply_overlay_check(4, 4, 0, 1, PDEV_OVERLAY);
+	if (ret != 0)
+		return;
+
+	selftest(1, "overlay test %d passed\n", 4);
+}
+
+/* test overlay apply/revert sequence */
+static void of_selftest_overlay_5(void)
+{
+	int ret;
+
+	/* device should disable */
+	ret = of_selftest_apply_revert_overlay_check(5, 5, 0, 1, PDEV_OVERLAY);
+	if (ret != 0)
+		return;
+
+	selftest(1, "overlay test %d passed\n", 5);
+}
+
+/* test overlay application in sequence */
+static void of_selftest_overlay_6(void)
+{
+	struct device_node *np;
+	int ret, i, ov_id[2];
+	int overlay_nr = 6, selftest_nr = 6;
+	int before = 0, after = 1;
+
+	/* selftest device must be in before state */
+	for (i = 0; i < 2; i++) {
+		if (of_selftest_device_exists(selftest_nr + i, PDEV_OVERLAY)
+				!= before) {
+			selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
+					overlay_path(overlay_nr + i),
+					selftest_path(selftest_nr + i,
+						PDEV_OVERLAY),
+					!before ? "enabled" : "disabled");
+			return;
+		}
+	}
+
+	/* apply the overlays */
+	for (i = 0; i < 2; i++) {
+
+		np = of_find_node_by_path(overlay_path(overlay_nr + i));
+		if (np == NULL) {
+			selftest(0, "could not find overlay node @\"%s\"\n",
+					overlay_path(overlay_nr + i));
+			return;
+		}
+
+		ret = of_overlay_create(np);
+		if (ret < 0)  {
+			selftest(0, "could not create overlay from \"%s\"\n",
+					overlay_path(overlay_nr + i));
+			return;
+		}
+		ov_id[i] = ret;
+	}
+
+	for (i = 0; i < 2; i++) {
+		/* selftest device must be in after state */
+		if (of_selftest_device_exists(selftest_nr + i, PDEV_OVERLAY)
+				!= after) {
+			selftest(0, "overlay @\"%s\" failed @\"%s\" %s\n",
+					overlay_path(overlay_nr + i),
+					selftest_path(selftest_nr + i,
+						PDEV_OVERLAY),
+					!after ? "enabled" : "disabled");
+			return;
+		}
+	}
+
+	for (i = 1; i >= 0; i--) {
+		ret = of_overlay_destroy(ov_id[i]);
+		if (ret != 0) {
+			selftest(0, "overlay @\"%s\" failed destroy @\"%s\"\n",
+					overlay_path(overlay_nr + i),
+					selftest_path(selftest_nr + i,
+						PDEV_OVERLAY));
+			return;
+		}
+	}
+
+	for (i = 0; i < 2; i++) {
+		/* selftest device must be again in before state */
+		if (of_selftest_device_exists(selftest_nr + i, PDEV_OVERLAY)
+				!= before) {
+			selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
+					overlay_path(overlay_nr + i),
+					selftest_path(selftest_nr + i,
+						PDEV_OVERLAY),
+					!before ? "enabled" : "disabled");
+			return;
+		}
+	}
+
+	selftest(1, "overlay test %d passed\n", 6);
+}
+
+/* test overlay application in sequence */
+static void of_selftest_overlay_8(void)
+{
+	struct device_node *np;
+	int ret, i, ov_id[2];
+	int overlay_nr = 8, selftest_nr = 8;
+
+	/* we don't care about device state in this test */
+
+	/* apply the overlays */
+	for (i = 0; i < 2; i++) {
+
+		np = of_find_node_by_path(overlay_path(overlay_nr + i));
+		if (np == NULL) {
+			selftest(0, "could not find overlay node @\"%s\"\n",
+					overlay_path(overlay_nr + i));
+			return;
+		}
+
+		ret = of_overlay_create(np);
+		if (ret < 0)  {
+			selftest(0, "could not create overlay from \"%s\"\n",
+					overlay_path(overlay_nr + i));
+			return;
+		}
+		ov_id[i] = ret;
+	}
+
+	/* now try to remove first overlay (it should fail) */
+	ret = of_overlay_destroy(ov_id[0]);
+	if (ret == 0) {
+		selftest(0, "overlay @\"%s\" was destroyed @\"%s\"\n",
+				overlay_path(overlay_nr + 0),
+				selftest_path(selftest_nr,
+					PDEV_OVERLAY));
+		return;
+	}
+
+	/* removing them in order should work */
+	for (i = 1; i >= 0; i--) {
+		ret = of_overlay_destroy(ov_id[i]);
+		if (ret != 0) {
+			selftest(0, "overlay @\"%s\" not destroyed @\"%s\"\n",
+					overlay_path(overlay_nr + i),
+					selftest_path(selftest_nr,
+						PDEV_OVERLAY));
+			return;
+		}
+	}
+
+	selftest(1, "overlay test %d passed\n", 8);
+}
+
+/* test insertion of a bus with parent devices */
+static void of_selftest_overlay_10(void)
+{
+	int ret;
+	char *child_path;
+
+	/* device should disable */
+	ret = of_selftest_apply_overlay_check(10, 10, 0, 1, PDEV_OVERLAY);
+	if (selftest(ret == 0,
+			"overlay test %d failed; overlay application\n", 10))
+		return;
+
+	child_path = kasprintf(GFP_KERNEL, "%s/test-selftest101",
+			selftest_path(10, PDEV_OVERLAY));
+	if (selftest(child_path, "overlay test %d failed; kasprintf\n", 10))
+		return;
+
+	ret = of_path_device_type_exists(child_path, PDEV_OVERLAY);
+	kfree(child_path);
+	if (selftest(ret, "overlay test %d failed; no child device\n", 10))
+		return;
+}
+
+/* test insertion of a bus with parent devices (and revert) */
+static void of_selftest_overlay_11(void)
+{
+	int ret;
+
+	/* device should disable */
+	ret = of_selftest_apply_revert_overlay_check(11, 11, 0, 1,
+			PDEV_OVERLAY);
+	if (selftest(ret == 0,
+			"overlay test %d failed; overlay application\n", 11))
+		return;
+}
+
+#if IS_ENABLED(CONFIG_I2C) && IS_ENABLED(CONFIG_OF_OVERLAY)
+
+struct selftest_i2c_bus_data {
+	struct platform_device	*pdev;
+	struct i2c_adapter	adap;
+};
+
+static int selftest_i2c_master_xfer(struct i2c_adapter *adap,
+		struct i2c_msg *msgs, int num)
+{
+	struct selftest_i2c_bus_data *std = i2c_get_adapdata(adap);
+
+	(void)std;
+
+	return num;
+}
+
+static u32 selftest_i2c_functionality(struct i2c_adapter *adap)
+{
+	return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
+}
+
+static const struct i2c_algorithm selftest_i2c_algo = {
+	.master_xfer	= selftest_i2c_master_xfer,
+	.functionality	= selftest_i2c_functionality,
+};
+
+static int selftest_i2c_bus_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+	struct selftest_i2c_bus_data *std;
+	struct i2c_adapter *adap;
+	int ret;
+
+	if (np == NULL) {
+		dev_err(dev, "No OF data for device\n");
+		return -EINVAL;
+
+	}
+
+	dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
+
+	std = devm_kzalloc(dev, sizeof(*std), GFP_KERNEL);
+	if (!std) {
+		dev_err(dev, "Failed to allocate selftest i2c data\n");
+		return -ENOMEM;
+	}
+
+	/* link them together */
+	std->pdev = pdev;
+	platform_set_drvdata(pdev, std);
+
+	adap = &std->adap;
+	i2c_set_adapdata(adap, std);
+	adap->nr = -1;
+	strlcpy(adap->name, pdev->name, sizeof(adap->name));
+	adap->class = I2C_CLASS_DEPRECATED;
+	adap->algo = &selftest_i2c_algo;
+	adap->dev.parent = dev;
+	adap->dev.of_node = dev->of_node;
+	adap->timeout = 5 * HZ;
+	adap->retries = 3;
+
+	ret = i2c_add_numbered_adapter(adap);
+	if (ret != 0) {
+		dev_err(dev, "Failed to add I2C adapter\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static int selftest_i2c_bus_remove(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+	struct selftest_i2c_bus_data *std = platform_get_drvdata(pdev);
+
+	dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
+	i2c_del_adapter(&std->adap);
+
+	return 0;
+}
+
+static struct of_device_id selftest_i2c_bus_match[] = {
+	{ .compatible = "selftest-i2c-bus", },
+	{},
+};
+
+static struct platform_driver selftest_i2c_bus_driver = {
+	.probe			= selftest_i2c_bus_probe,
+	.remove			= selftest_i2c_bus_remove,
+	.driver = {
+		.name		= "selftest-i2c-bus",
+		.of_match_table	= of_match_ptr(selftest_i2c_bus_match),
+	},
+};
+
+static int selftest_i2c_dev_probe(struct i2c_client *client,
+		const struct i2c_device_id *id)
+{
+	struct device *dev = &client->dev;
+	struct device_node *np = client->dev.of_node;
+
+	if (!np) {
+		dev_err(dev, "No OF node\n");
+		return -EINVAL;
+	}
+
+	dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
+
+	return 0;
+};
+
+static int selftest_i2c_dev_remove(struct i2c_client *client)
+{
+	struct device *dev = &client->dev;
+	struct device_node *np = client->dev.of_node;
+
+	dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
+	return 0;
+}
+
+static const struct i2c_device_id selftest_i2c_dev_id[] = {
+	{ .name = "selftest-i2c-dev" },
+	{ }
+};
+
+static struct i2c_driver selftest_i2c_dev_driver = {
+	.driver = {
+		.name = "selftest-i2c-dev",
+		.owner = THIS_MODULE,
+	},
+	.probe = selftest_i2c_dev_probe,
+	.remove = selftest_i2c_dev_remove,
+	.id_table = selftest_i2c_dev_id,
+};
+
+#if IS_ENABLED(CONFIG_I2C_MUX)
+
+struct selftest_i2c_mux_data {
+	int nchans;
+	struct i2c_adapter *adap[];
+};
+
+static int selftest_i2c_mux_select_chan(struct i2c_adapter *adap,
+			       void *client, u32 chan)
+{
+	return 0;
+}
+
+static int selftest_i2c_mux_probe(struct i2c_client *client,
+		const struct i2c_device_id *id)
+{
+	int ret, i, nchans, size;
+	struct device *dev = &client->dev;
+	struct i2c_adapter *adap = to_i2c_adapter(dev->parent);
+	struct device_node *np = client->dev.of_node, *child;
+	struct selftest_i2c_mux_data *stm;
+	u32 reg, max_reg;
+
+	dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
+
+	if (!np) {
+		dev_err(dev, "No OF node\n");
+		return -EINVAL;
+	}
+
+	max_reg = (u32)-1;
+	for_each_child_of_node(np, child) {
+		ret = of_property_read_u32(child, "reg", &reg);
+		if (ret)
+			continue;
+		if (max_reg == (u32)-1 || reg > max_reg)
+			max_reg = reg;
+	}
+	nchans = max_reg == (u32)-1 ? 0 : max_reg + 1;
+	if (nchans == 0) {
+		dev_err(dev, "No channels\n");
+		return -EINVAL;
+	}
+
+	size = offsetof(struct selftest_i2c_mux_data, adap[nchans]);
+	stm = devm_kzalloc(dev, size, GFP_KERNEL);
+	if (!stm) {
+		dev_err(dev, "Out of memory\n");
+		return -ENOMEM;
+	}
+	stm->nchans = nchans;
+	for (i = 0; i < nchans; i++) {
+		stm->adap[i] = i2c_add_mux_adapter(adap, dev, client,
+				0, i, 0, selftest_i2c_mux_select_chan, NULL);
+		if (!stm->adap[i]) {
+			dev_err(dev, "Failed to register mux #%d\n", i);
+			for (i--; i >= 0; i--)
+				i2c_del_mux_adapter(stm->adap[i]);
+			return -ENODEV;
+		}
+	}
+
+	i2c_set_clientdata(client, stm);
+
+	return 0;
+};
+
+static int selftest_i2c_mux_remove(struct i2c_client *client)
+{
+	struct device *dev = &client->dev;
+	struct device_node *np = client->dev.of_node;
+	struct selftest_i2c_mux_data *stm = i2c_get_clientdata(client);
+	int i;
+
+	dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
+	for (i = stm->nchans - 1; i >= 0; i--)
+		i2c_del_mux_adapter(stm->adap[i]);
+	return 0;
+}
+
+static const struct i2c_device_id selftest_i2c_mux_id[] = {
+	{ .name = "selftest-i2c-mux" },
+	{ }
+};
+
+static struct i2c_driver selftest_i2c_mux_driver = {
+	.driver = {
+		.name = "selftest-i2c-mux",
+		.owner = THIS_MODULE,
+	},
+	.probe = selftest_i2c_mux_probe,
+	.remove = selftest_i2c_mux_remove,
+	.id_table = selftest_i2c_mux_id,
+};
+
+#endif
+
+static int of_selftest_overlay_i2c_init(void)
+{
+	int ret;
+
+	ret = i2c_add_driver(&selftest_i2c_dev_driver);
+	if (selftest(ret == 0,
+			"could not register selftest i2c device driver\n"))
+		return ret;
+
+	ret = platform_driver_register(&selftest_i2c_bus_driver);
+	if (selftest(ret == 0,
+			"could not register selftest i2c bus driver\n"))
+		return ret;
+
+#if IS_ENABLED(CONFIG_I2C_MUX)
+	ret = i2c_add_driver(&selftest_i2c_mux_driver);
+	if (selftest(ret == 0,
+			"could not register selftest i2c mux driver\n"))
+		return ret;
+#endif
+
+	return 0;
+}
+
+static void of_selftest_overlay_i2c_cleanup(void)
+{
+#if IS_ENABLED(CONFIG_I2C_MUX)
+	i2c_del_driver(&selftest_i2c_mux_driver);
+#endif
+	platform_driver_unregister(&selftest_i2c_bus_driver);
+	i2c_del_driver(&selftest_i2c_dev_driver);
+}
+
+static void of_selftest_overlay_i2c_12(void)
+{
+	int ret;
+
+	/* device should enable */
+	ret = of_selftest_apply_overlay_check(12, 12, 0, 1, I2C_OVERLAY);
+	if (ret != 0)
+		return;
+
+	selftest(1, "overlay test %d passed\n", 12);
+}
+
+/* test deactivation of device */
+static void of_selftest_overlay_i2c_13(void)
+{
+	int ret;
+
+	/* device should disable */
+	ret = of_selftest_apply_overlay_check(13, 13, 1, 0, I2C_OVERLAY);
+	if (ret != 0)
+		return;
+
+	selftest(1, "overlay test %d passed\n", 13);
+}
+
+/* just check for i2c mux existence */
+static void of_selftest_overlay_i2c_14(void)
+{
+}
+
+static void of_selftest_overlay_i2c_15(void)
+{
+	int ret;
+
+	/* device should enable */
+	ret = of_selftest_apply_overlay_check(16, 15, 0, 1, I2C_OVERLAY);
+	if (ret != 0)
+		return;
+
+	selftest(1, "overlay test %d passed\n", 15);
+}
+
+#else
+
+static inline void of_selftest_overlay_i2c_14(void) { }
+static inline void of_selftest_overlay_i2c_15(void) { }
+
+#endif
+
+static void __init of_selftest_overlay(void)
+{
+	struct device_node *bus_np = NULL;
+	int ret;
+
+	ret = platform_driver_register(&selftest_driver);
+	if (ret != 0) {
+		selftest(0, "could not register selftest driver\n");
+		goto out;
+	}
+
+	bus_np = of_find_node_by_path(bus_path);
+	if (bus_np == NULL) {
+		selftest(0, "could not find bus_path \"%s\"\n", bus_path);
+		goto out;
+	}
+
+	ret = of_platform_populate(bus_np, of_default_bus_match_table,
+			NULL, NULL);
+	if (ret != 0) {
+		selftest(0, "could not populate bus @ \"%s\"\n", bus_path);
+		goto out;
+	}
+
+	if (!of_selftest_device_exists(100, PDEV_OVERLAY)) {
+		selftest(0, "could not find selftest0 @ \"%s\"\n",
+				selftest_path(100, PDEV_OVERLAY));
+		goto out;
+	}
+
+	if (of_selftest_device_exists(101, PDEV_OVERLAY)) {
+		selftest(0, "selftest1 @ \"%s\" should not exist\n",
+				selftest_path(101, PDEV_OVERLAY));
+		goto out;
+	}
+
+	selftest(1, "basic infrastructure of overlays passed");
+
+	/* tests in sequence */
+	of_selftest_overlay_0();
+	of_selftest_overlay_1();
+	of_selftest_overlay_2();
+	of_selftest_overlay_3();
+	of_selftest_overlay_4();
+	of_selftest_overlay_5();
+	of_selftest_overlay_6();
+	of_selftest_overlay_8();
+
+	of_selftest_overlay_10();
+	of_selftest_overlay_11();
+
+#if IS_ENABLED(CONFIG_I2C)
+	if (selftest(of_selftest_overlay_i2c_init() == 0, "i2c init failed\n"))
+		goto out;
+
+	of_selftest_overlay_i2c_12();
+	of_selftest_overlay_i2c_13();
+	of_selftest_overlay_i2c_14();
+	of_selftest_overlay_i2c_15();
+
+	of_selftest_overlay_i2c_cleanup();
+#endif
+
+out:
+	of_node_put(bus_np);
+}
+
+#else
+static inline void __init of_selftest_overlay(void) { }
+#endif
+
+static int __init of_selftest(void)
+{
+	struct device_node *np;
+	int res;
+
+	/* adding data for selftest */
+	res = selftest_data_add();
+	if (res)
+		return res;
+	if (!of_aliases)
+		of_aliases = of_find_node_by_path("/aliases");
+
+	np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
+	if (!np) {
+		pr_info("No testcase data in device tree; not running tests\n");
+		return 0;
+	}
+	of_node_put(np);
+
+	pr_info("start of selftest - you will see error messages\n");
+	of_selftest_check_tree_linkage();
+	of_selftest_check_phandles();
+	of_selftest_find_node_by_name();
+	of_selftest_dynamic();
+	of_selftest_parse_phandle_with_args();
+	of_selftest_property_string();
+	of_selftest_property_copy();
+	of_selftest_changeset();
+	of_selftest_parse_interrupts();
+	of_selftest_parse_interrupts_extended();
+	of_selftest_match_node();
+	of_selftest_platform_populate();
+	of_selftest_overlay();
+
+	/* Double check linkage after removing testcase data */
+	of_selftest_check_tree_linkage();
+
+	pr_info("end of selftest - %i passed, %i failed\n",
+		selftest_results.passed, selftest_results.failed);
+
+	return 0;
+}
+late_initcall(of_selftest);
Index: b/drivers/of/unittest.c
===================================================================
--- a/drivers/of/unittest.c
+++ /dev/null
@@ -1,1879 +0,0 @@
-/*
- * Self tests for device tree subsystem
- */
-
-#define pr_fmt(fmt) "### dt-test ### " fmt
-
-#include <linux/clk.h>
-#include <linux/err.h>
-#include <linux/errno.h>
-#include <linux/hashtable.h>
-#include <linux/module.h>
-#include <linux/of.h>
-#include <linux/of_fdt.h>
-#include <linux/of_irq.h>
-#include <linux/of_platform.h>
-#include <linux/list.h>
-#include <linux/mutex.h>
-#include <linux/slab.h>
-#include <linux/device.h>
-#include <linux/platform_device.h>
-#include <linux/of_platform.h>
-
-#include <linux/i2c.h>
-#include <linux/i2c-mux.h>
-
-#include "of_private.h"
-
-static struct selftest_results {
-	int passed;
-	int failed;
-} selftest_results;
-
-#define selftest(result, fmt, ...) ({ \
-	bool failed = !(result); \
-	if (failed) { \
-		selftest_results.failed++; \
-		pr_err("FAIL %s():%i " fmt, __func__, __LINE__, ##__VA_ARGS__); \
-	} else { \
-		selftest_results.passed++; \
-		pr_debug("pass %s():%i\n", __func__, __LINE__); \
-	} \
-	failed; \
-})
-
-static void __init of_selftest_find_node_by_name(void)
-{
-	struct device_node *np;
-	const char *options;
-
-	np = of_find_node_by_path("/testcase-data");
-	selftest(np && !strcmp("/testcase-data", np->full_name),
-		"find /testcase-data failed\n");
-	of_node_put(np);
-
-	/* Test if trailing '/' works */
-	np = of_find_node_by_path("/testcase-data/");
-	selftest(!np, "trailing '/' on /testcase-data/ should fail\n");
-
-	np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
-	selftest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", np->full_name),
-		"find /testcase-data/phandle-tests/consumer-a failed\n");
-	of_node_put(np);
-
-	np = of_find_node_by_path("testcase-alias");
-	selftest(np && !strcmp("/testcase-data", np->full_name),
-		"find testcase-alias failed\n");
-	of_node_put(np);
-
-	/* Test if trailing '/' works on aliases */
-	np = of_find_node_by_path("testcase-alias/");
-	selftest(!np, "trailing '/' on testcase-alias/ should fail\n");
-
-	np = of_find_node_by_path("testcase-alias/phandle-tests/consumer-a");
-	selftest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", np->full_name),
-		"find testcase-alias/phandle-tests/consumer-a failed\n");
-	of_node_put(np);
-
-	np = of_find_node_by_path("/testcase-data/missing-path");
-	selftest(!np, "non-existent path returned node %s\n", np->full_name);
-	of_node_put(np);
-
-	np = of_find_node_by_path("missing-alias");
-	selftest(!np, "non-existent alias returned node %s\n", np->full_name);
-	of_node_put(np);
-
-	np = of_find_node_by_path("testcase-alias/missing-path");
-	selftest(!np, "non-existent alias with relative path returned node %s\n", np->full_name);
-	of_node_put(np);
-
-	np = of_find_node_opts_by_path("/testcase-data:testoption", &options);
-	selftest(np && !strcmp("testoption", options),
-		 "option path test failed\n");
-	of_node_put(np);
-
-	np = of_find_node_opts_by_path("/testcase-data:testoption", NULL);
-	selftest(np, "NULL option path test failed\n");
-	of_node_put(np);
-
-	np = of_find_node_opts_by_path("testcase-alias:testaliasoption",
-				       &options);
-	selftest(np && !strcmp("testaliasoption", options),
-		 "option alias path test failed\n");
-	of_node_put(np);
-
-	np = of_find_node_opts_by_path("testcase-alias:testaliasoption", NULL);
-	selftest(np, "NULL option alias path test failed\n");
-	of_node_put(np);
-
-	options = "testoption";
-	np = of_find_node_opts_by_path("testcase-alias", &options);
-	selftest(np && !options, "option clearing test failed\n");
-	of_node_put(np);
-
-	options = "testoption";
-	np = of_find_node_opts_by_path("/", &options);
-	selftest(np && !options, "option clearing root node test failed\n");
-	of_node_put(np);
-}
-
-static void __init of_selftest_dynamic(void)
-{
-	struct device_node *np;
-	struct property *prop;
-
-	np = of_find_node_by_path("/testcase-data");
-	if (!np) {
-		pr_err("missing testcase data\n");
-		return;
-	}
-
-	/* Array of 4 properties for the purpose of testing */
-	prop = kzalloc(sizeof(*prop) * 4, GFP_KERNEL);
-	if (!prop) {
-		selftest(0, "kzalloc() failed\n");
-		return;
-	}
-
-	/* Add a new property - should pass*/
-	prop->name = "new-property";
-	prop->value = "new-property-data";
-	prop->length = strlen(prop->value);
-	selftest(of_add_property(np, prop) == 0, "Adding a new property failed\n");
-
-	/* Try to add an existing property - should fail */
-	prop++;
-	prop->name = "new-property";
-	prop->value = "new-property-data-should-fail";
-	prop->length = strlen(prop->value);
-	selftest(of_add_property(np, prop) != 0,
-		 "Adding an existing property should have failed\n");
-
-	/* Try to modify an existing property - should pass */
-	prop->value = "modify-property-data-should-pass";
-	prop->length = strlen(prop->value);
-	selftest(of_update_property(np, prop) == 0,
-		 "Updating an existing property should have passed\n");
-
-	/* Try to modify non-existent property - should pass*/
-	prop++;
-	prop->name = "modify-property";
-	prop->value = "modify-missing-property-data-should-pass";
-	prop->length = strlen(prop->value);
-	selftest(of_update_property(np, prop) == 0,
-		 "Updating a missing property should have passed\n");
-
-	/* Remove property - should pass */
-	selftest(of_remove_property(np, prop) == 0,
-		 "Removing a property should have passed\n");
-
-	/* Adding very large property - should pass */
-	prop++;
-	prop->name = "large-property-PAGE_SIZEx8";
-	prop->length = PAGE_SIZE * 8;
-	prop->value = kzalloc(prop->length, GFP_KERNEL);
-	selftest(prop->value != NULL, "Unable to allocate large buffer\n");
-	if (prop->value)
-		selftest(of_add_property(np, prop) == 0,
-			 "Adding a large property should have passed\n");
-}
-
-static int __init of_selftest_check_node_linkage(struct device_node *np)
-{
-	struct device_node *child;
-	int count = 0, rc;
-
-	for_each_child_of_node(np, child) {
-		if (child->parent != np) {
-			pr_err("Child node %s links to wrong parent %s\n",
-				 child->name, np->name);
-			return -EINVAL;
-		}
-
-		rc = of_selftest_check_node_linkage(child);
-		if (rc < 0)
-			return rc;
-		count += rc;
-	}
-
-	return count + 1;
-}
-
-static void __init of_selftest_check_tree_linkage(void)
-{
-	struct device_node *np;
-	int allnode_count = 0, child_count;
-
-	if (!of_root)
-		return;
-
-	for_each_of_allnodes(np)
-		allnode_count++;
-	child_count = of_selftest_check_node_linkage(of_root);
-
-	selftest(child_count > 0, "Device node data structure is corrupted\n");
-	selftest(child_count == allnode_count, "allnodes list size (%i) doesn't match"
-		 "sibling lists size (%i)\n", allnode_count, child_count);
-	pr_debug("allnodes list size (%i); sibling lists size (%i)\n", allnode_count, child_count);
-}
-
-struct node_hash {
-	struct hlist_node node;
-	struct device_node *np;
-};
-
-static DEFINE_HASHTABLE(phandle_ht, 8);
-static void __init of_selftest_check_phandles(void)
-{
-	struct device_node *np;
-	struct node_hash *nh;
-	struct hlist_node *tmp;
-	int i, dup_count = 0, phandle_count = 0;
-
-	for_each_of_allnodes(np) {
-		if (!np->phandle)
-			continue;
-
-		hash_for_each_possible(phandle_ht, nh, node, np->phandle) {
-			if (nh->np->phandle == np->phandle) {
-				pr_info("Duplicate phandle! %i used by %s and %s\n",
-					np->phandle, nh->np->full_name, np->full_name);
-				dup_count++;
-				break;
-			}
-		}
-
-		nh = kzalloc(sizeof(*nh), GFP_KERNEL);
-		if (WARN_ON(!nh))
-			return;
-
-		nh->np = np;
-		hash_add(phandle_ht, &nh->node, np->phandle);
-		phandle_count++;
-	}
-	selftest(dup_count == 0, "Found %i duplicates in %i phandles\n",
-		 dup_count, phandle_count);
-
-	/* Clean up */
-	hash_for_each_safe(phandle_ht, i, tmp, nh, node) {
-		hash_del(&nh->node);
-		kfree(nh);
-	}
-}
-
-static void __init of_selftest_parse_phandle_with_args(void)
-{
-	struct device_node *np;
-	struct of_phandle_args args;
-	int i, rc;
-
-	np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
-	if (!np) {
-		pr_err("missing testcase data\n");
-		return;
-	}
-
-	rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells");
-	selftest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc);
-
-	for (i = 0; i < 8; i++) {
-		bool passed = true;
-		rc = of_parse_phandle_with_args(np, "phandle-list",
-						"#phandle-cells", i, &args);
-
-		/* Test the values from tests-phandle.dtsi */
-		switch (i) {
-		case 0:
-			passed &= !rc;
-			passed &= (args.args_count == 1);
-			passed &= (args.args[0] == (i + 1));
-			break;
-		case 1:
-			passed &= !rc;
-			passed &= (args.args_count == 2);
-			passed &= (args.args[0] == (i + 1));
-			passed &= (args.args[1] == 0);
-			break;
-		case 2:
-			passed &= (rc == -ENOENT);
-			break;
-		case 3:
-			passed &= !rc;
-			passed &= (args.args_count == 3);
-			passed &= (args.args[0] == (i + 1));
-			passed &= (args.args[1] == 4);
-			passed &= (args.args[2] == 3);
-			break;
-		case 4:
-			passed &= !rc;
-			passed &= (args.args_count == 2);
-			passed &= (args.args[0] == (i + 1));
-			passed &= (args.args[1] == 100);
-			break;
-		case 5:
-			passed &= !rc;
-			passed &= (args.args_count == 0);
-			break;
-		case 6:
-			passed &= !rc;
-			passed &= (args.args_count == 1);
-			passed &= (args.args[0] == (i + 1));
-			break;
-		case 7:
-			passed &= (rc == -ENOENT);
-			break;
-		default:
-			passed = false;
-		}
-
-		selftest(passed, "index %i - data error on node %s rc=%i\n",
-			 i, args.np->full_name, rc);
-	}
-
-	/* Check for missing list property */
-	rc = of_parse_phandle_with_args(np, "phandle-list-missing",
-					"#phandle-cells", 0, &args);
-	selftest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
-	rc = of_count_phandle_with_args(np, "phandle-list-missing",
-					"#phandle-cells");
-	selftest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
-
-	/* Check for missing cells property */
-	rc = of_parse_phandle_with_args(np, "phandle-list",
-					"#phandle-cells-missing", 0, &args);
-	selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
-	rc = of_count_phandle_with_args(np, "phandle-list",
-					"#phandle-cells-missing");
-	selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
-
-	/* Check for bad phandle in list */
-	rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle",
-					"#phandle-cells", 0, &args);
-	selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
-	rc = of_count_phandle_with_args(np, "phandle-list-bad-phandle",
-					"#phandle-cells");
-	selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
-
-	/* Check for incorrectly formed argument list */
-	rc = of_parse_phandle_with_args(np, "phandle-list-bad-args",
-					"#phandle-cells", 1, &args);
-	selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
-	rc = of_count_phandle_with_args(np, "phandle-list-bad-args",
-					"#phandle-cells");
-	selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
-}
-
-static void __init of_selftest_property_string(void)
-{
-	const char *strings[4];
-	struct device_node *np;
-	int rc;
-
-	np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
-	if (!np) {
-		pr_err("No testcase data in device tree\n");
-		return;
-	}
-
-	rc = of_property_match_string(np, "phandle-list-names", "first");
-	selftest(rc == 0, "first expected:0 got:%i\n", rc);
-	rc = of_property_match_string(np, "phandle-list-names", "second");
-	selftest(rc == 1, "second expected:0 got:%i\n", rc);
-	rc = of_property_match_string(np, "phandle-list-names", "third");
-	selftest(rc == 2, "third expected:0 got:%i\n", rc);
-	rc = of_property_match_string(np, "phandle-list-names", "fourth");
-	selftest(rc == -ENODATA, "unmatched string; rc=%i\n", rc);
-	rc = of_property_match_string(np, "missing-property", "blah");
-	selftest(rc == -EINVAL, "missing property; rc=%i\n", rc);
-	rc = of_property_match_string(np, "empty-property", "blah");
-	selftest(rc == -ENODATA, "empty property; rc=%i\n", rc);
-	rc = of_property_match_string(np, "unterminated-string", "blah");
-	selftest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
-
-	/* of_property_count_strings() tests */
-	rc = of_property_count_strings(np, "string-property");
-	selftest(rc == 1, "Incorrect string count; rc=%i\n", rc);
-	rc = of_property_count_strings(np, "phandle-list-names");
-	selftest(rc == 3, "Incorrect string count; rc=%i\n", rc);
-	rc = of_property_count_strings(np, "unterminated-string");
-	selftest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
-	rc = of_property_count_strings(np, "unterminated-string-list");
-	selftest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
-
-	/* of_property_read_string_index() tests */
-	rc = of_property_read_string_index(np, "string-property", 0, strings);
-	selftest(rc == 0 && !strcmp(strings[0], "foobar"), "of_property_read_string_index() failure; rc=%i\n", rc);
-	strings[0] = NULL;
-	rc = of_property_read_string_index(np, "string-property", 1, strings);
-	selftest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
-	rc = of_property_read_string_index(np, "phandle-list-names", 0, strings);
-	selftest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
-	rc = of_property_read_string_index(np, "phandle-list-names", 1, strings);
-	selftest(rc == 0 && !strcmp(strings[0], "second"), "of_property_read_string_index() failure; rc=%i\n", rc);
-	rc = of_property_read_string_index(np, "phandle-list-names", 2, strings);
-	selftest(rc == 0 && !strcmp(strings[0], "third"), "of_property_read_string_index() failure; rc=%i\n", rc);
-	strings[0] = NULL;
-	rc = of_property_read_string_index(np, "phandle-list-names", 3, strings);
-	selftest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
-	strings[0] = NULL;
-	rc = of_property_read_string_index(np, "unterminated-string", 0, strings);
-	selftest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
-	rc = of_property_read_string_index(np, "unterminated-string-list", 0, strings);
-	selftest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
-	strings[0] = NULL;
-	rc = of_property_read_string_index(np, "unterminated-string-list", 2, strings); /* should fail */
-	selftest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
-	strings[1] = NULL;
-
-	/* of_property_read_string_array() tests */
-	rc = of_property_read_string_array(np, "string-property", strings, 4);
-	selftest(rc == 1, "Incorrect string count; rc=%i\n", rc);
-	rc = of_property_read_string_array(np, "phandle-list-names", strings, 4);
-	selftest(rc == 3, "Incorrect string count; rc=%i\n", rc);
-	rc = of_property_read_string_array(np, "unterminated-string", strings, 4);
-	selftest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
-	/* -- An incorrectly formed string should cause a failure */
-	rc = of_property_read_string_array(np, "unterminated-string-list", strings, 4);
-	selftest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
-	/* -- parsing the correctly formed strings should still work: */
-	strings[2] = NULL;
-	rc = of_property_read_string_array(np, "unterminated-string-list", strings, 2);
-	selftest(rc == 2 && strings[2] == NULL, "of_property_read_string_array() failure; rc=%i\n", rc);
-	strings[1] = NULL;
-	rc = of_property_read_string_array(np, "phandle-list-names", strings, 1);
-	selftest(rc == 1 && strings[1] == NULL, "Overwrote end of string array; rc=%i, str='%s'\n", rc, strings[1]);
-}
-
-#define propcmp(p1, p2) (((p1)->length == (p2)->length) && \
-			(p1)->value && (p2)->value && \
-			!memcmp((p1)->value, (p2)->value, (p1)->length) && \
-			!strcmp((p1)->name, (p2)->name))
-static void __init of_selftest_property_copy(void)
-{
-#ifdef CONFIG_OF_DYNAMIC
-	struct property p1 = { .name = "p1", .length = 0, .value = "" };
-	struct property p2 = { .name = "p2", .length = 5, .value = "abcd" };
-	struct property *new;
-
-	new = __of_prop_dup(&p1, GFP_KERNEL);
-	selftest(new && propcmp(&p1, new), "empty property didn't copy correctly\n");
-	kfree(new->value);
-	kfree(new->name);
-	kfree(new);
-
-	new = __of_prop_dup(&p2, GFP_KERNEL);
-	selftest(new && propcmp(&p2, new), "non-empty property didn't copy correctly\n");
-	kfree(new->value);
-	kfree(new->name);
-	kfree(new);
-#endif
-}
-
-static void __init of_selftest_changeset(void)
-{
-#ifdef CONFIG_OF_DYNAMIC
-	struct property *ppadd, padd = { .name = "prop-add", .length = 0, .value = "" };
-	struct property *ppupdate, pupdate = { .name = "prop-update", .length = 5, .value = "abcd" };
-	struct property *ppremove;
-	struct device_node *n1, *n2, *n21, *nremove, *parent, *np;
-	struct of_changeset chgset;
-
-	of_changeset_init(&chgset);
-	n1 = __of_node_dup(NULL, "/testcase-data/changeset/n1");
-	selftest(n1, "testcase setup failure\n");
-	n2 = __of_node_dup(NULL, "/testcase-data/changeset/n2");
-	selftest(n2, "testcase setup failure\n");
-	n21 = __of_node_dup(NULL, "%s/%s", "/testcase-data/changeset/n2", "n21");
-	selftest(n21, "testcase setup failure %p\n", n21);
-	nremove = of_find_node_by_path("/testcase-data/changeset/node-remove");
-	selftest(nremove, "testcase setup failure\n");
-	ppadd = __of_prop_dup(&padd, GFP_KERNEL);
-	selftest(ppadd, "testcase setup failure\n");
-	ppupdate = __of_prop_dup(&pupdate, GFP_KERNEL);
-	selftest(ppupdate, "testcase setup failure\n");
-	parent = nremove->parent;
-	n1->parent = parent;
-	n2->parent = parent;
-	n21->parent = n2;
-	n2->child = n21;
-	ppremove = of_find_property(parent, "prop-remove", NULL);
-	selftest(ppremove, "failed to find removal prop");
-
-	of_changeset_init(&chgset);
-	selftest(!of_changeset_attach_node(&chgset, n1), "fail attach n1\n");
-	selftest(!of_changeset_attach_node(&chgset, n2), "fail attach n2\n");
-	selftest(!of_changeset_detach_node(&chgset, nremove), "fail remove node\n");
-	selftest(!of_changeset_attach_node(&chgset, n21), "fail attach n21\n");
-	selftest(!of_changeset_add_property(&chgset, parent, ppadd), "fail add prop\n");
-	selftest(!of_changeset_update_property(&chgset, parent, ppupdate), "fail update prop\n");
-	selftest(!of_changeset_remove_property(&chgset, parent, ppremove), "fail remove prop\n");
-	mutex_lock(&of_mutex);
-	selftest(!of_changeset_apply(&chgset), "apply failed\n");
-	mutex_unlock(&of_mutex);
-
-	/* Make sure node names are constructed correctly */
-	selftest((np = of_find_node_by_path("/testcase-data/changeset/n2/n21")),
-		 "'%s' not added\n", n21->full_name);
-	of_node_put(np);
-
-	mutex_lock(&of_mutex);
-	selftest(!of_changeset_revert(&chgset), "revert failed\n");
-	mutex_unlock(&of_mutex);
-
-	of_changeset_destroy(&chgset);
-#endif
-}
-
-static void __init of_selftest_parse_interrupts(void)
-{
-	struct device_node *np;
-	struct of_phandle_args args;
-	int i, rc;
-
-	np = of_find_node_by_path("/testcase-data/interrupts/interrupts0");
-	if (!np) {
-		pr_err("missing testcase data\n");
-		return;
-	}
-
-	for (i = 0; i < 4; i++) {
-		bool passed = true;
-		args.args_count = 0;
-		rc = of_irq_parse_one(np, i, &args);
-
-		passed &= !rc;
-		passed &= (args.args_count == 1);
-		passed &= (args.args[0] == (i + 1));
-
-		selftest(passed, "index %i - data error on node %s rc=%i\n",
-			 i, args.np->full_name, rc);
-	}
-	of_node_put(np);
-
-	np = of_find_node_by_path("/testcase-data/interrupts/interrupts1");
-	if (!np) {
-		pr_err("missing testcase data\n");
-		return;
-	}
-
-	for (i = 0; i < 4; i++) {
-		bool passed = true;
-		args.args_count = 0;
-		rc = of_irq_parse_one(np, i, &args);
-
-		/* Test the values from tests-phandle.dtsi */
-		switch (i) {
-		case 0:
-			passed &= !rc;
-			passed &= (args.args_count == 1);
-			passed &= (args.args[0] == 9);
-			break;
-		case 1:
-			passed &= !rc;
-			passed &= (args.args_count == 3);
-			passed &= (args.args[0] == 10);
-			passed &= (args.args[1] == 11);
-			passed &= (args.args[2] == 12);
-			break;
-		case 2:
-			passed &= !rc;
-			passed &= (args.args_count == 2);
-			passed &= (args.args[0] == 13);
-			passed &= (args.args[1] == 14);
-			break;
-		case 3:
-			passed &= !rc;
-			passed &= (args.args_count == 2);
-			passed &= (args.args[0] == 15);
-			passed &= (args.args[1] == 16);
-			break;
-		default:
-			passed = false;
-		}
-		selftest(passed, "index %i - data error on node %s rc=%i\n",
-			 i, args.np->full_name, rc);
-	}
-	of_node_put(np);
-}
-
-static void __init of_selftest_parse_interrupts_extended(void)
-{
-	struct device_node *np;
-	struct of_phandle_args args;
-	int i, rc;
-
-	np = of_find_node_by_path("/testcase-data/interrupts/interrupts-extended0");
-	if (!np) {
-		pr_err("missing testcase data\n");
-		return;
-	}
-
-	for (i = 0; i < 7; i++) {
-		bool passed = true;
-		rc = of_irq_parse_one(np, i, &args);
-
-		/* Test the values from tests-phandle.dtsi */
-		switch (i) {
-		case 0:
-			passed &= !rc;
-			passed &= (args.args_count == 1);
-			passed &= (args.args[0] == 1);
-			break;
-		case 1:
-			passed &= !rc;
-			passed &= (args.args_count == 3);
-			passed &= (args.args[0] == 2);
-			passed &= (args.args[1] == 3);
-			passed &= (args.args[2] == 4);
-			break;
-		case 2:
-			passed &= !rc;
-			passed &= (args.args_count == 2);
-			passed &= (args.args[0] == 5);
-			passed &= (args.args[1] == 6);
-			break;
-		case 3:
-			passed &= !rc;
-			passed &= (args.args_count == 1);
-			passed &= (args.args[0] == 9);
-			break;
-		case 4:
-			passed &= !rc;
-			passed &= (args.args_count == 3);
-			passed &= (args.args[0] == 10);
-			passed &= (args.args[1] == 11);
-			passed &= (args.args[2] == 12);
-			break;
-		case 5:
-			passed &= !rc;
-			passed &= (args.args_count == 2);
-			passed &= (args.args[0] == 13);
-			passed &= (args.args[1] == 14);
-			break;
-		case 6:
-			passed &= !rc;
-			passed &= (args.args_count == 1);
-			passed &= (args.args[0] == 15);
-			break;
-		default:
-			passed = false;
-		}
-
-		selftest(passed, "index %i - data error on node %s rc=%i\n",
-			 i, args.np->full_name, rc);
-	}
-	of_node_put(np);
-}
-
-static struct of_device_id match_node_table[] = {
-	{ .data = "A", .name = "name0", }, /* Name alone is lowest priority */
-	{ .data = "B", .type = "type1", }, /* followed by type alone */
-
-	{ .data = "Ca", .name = "name2", .type = "type1", }, /* followed by both together */
-	{ .data = "Cb", .name = "name2", }, /* Only match when type doesn't match */
-	{ .data = "Cc", .name = "name2", .type = "type2", },
-
-	{ .data = "E", .compatible = "compat3" },
-	{ .data = "G", .compatible = "compat2", },
-	{ .data = "H", .compatible = "compat2", .name = "name5", },
-	{ .data = "I", .compatible = "compat2", .type = "type1", },
-	{ .data = "J", .compatible = "compat2", .type = "type1", .name = "name8", },
-	{ .data = "K", .compatible = "compat2", .name = "name9", },
-	{}
-};
-
-static struct {
-	const char *path;
-	const char *data;
-} match_node_tests[] = {
-	{ .path = "/testcase-data/match-node/name0", .data = "A", },
-	{ .path = "/testcase-data/match-node/name1", .data = "B", },
-	{ .path = "/testcase-data/match-node/a/name2", .data = "Ca", },
-	{ .path = "/testcase-data/match-node/b/name2", .data = "Cb", },
-	{ .path = "/testcase-data/match-node/c/name2", .data = "Cc", },
-	{ .path = "/testcase-data/match-node/name3", .data = "E", },
-	{ .path = "/testcase-data/match-node/name4", .data = "G", },
-	{ .path = "/testcase-data/match-node/name5", .data = "H", },
-	{ .path = "/testcase-data/match-node/name6", .data = "G", },
-	{ .path = "/testcase-data/match-node/name7", .data = "I", },
-	{ .path = "/testcase-data/match-node/name8", .data = "J", },
-	{ .path = "/testcase-data/match-node/name9", .data = "K", },
-};
-
-static void __init of_selftest_match_node(void)
-{
-	struct device_node *np;
-	const struct of_device_id *match;
-	int i;
-
-	for (i = 0; i < ARRAY_SIZE(match_node_tests); i++) {
-		np = of_find_node_by_path(match_node_tests[i].path);
-		if (!np) {
-			selftest(0, "missing testcase node %s\n",
-				match_node_tests[i].path);
-			continue;
-		}
-
-		match = of_match_node(match_node_table, np);
-		if (!match) {
-			selftest(0, "%s didn't match anything\n",
-				match_node_tests[i].path);
-			continue;
-		}
-
-		if (strcmp(match->data, match_node_tests[i].data) != 0) {
-			selftest(0, "%s got wrong match. expected %s, got %s\n",
-				match_node_tests[i].path, match_node_tests[i].data,
-				(const char *)match->data);
-			continue;
-		}
-		selftest(1, "passed");
-	}
-}
-
-struct device test_bus = {
-	.init_name = "unittest-bus",
-};
-static void __init of_selftest_platform_populate(void)
-{
-	int irq, rc;
-	struct device_node *np, *child, *grandchild;
-	struct platform_device *pdev;
-	struct of_device_id match[] = {
-		{ .compatible = "test-device", },
-		{}
-	};
-
-	np = of_find_node_by_path("/testcase-data");
-	of_platform_populate(np, of_default_bus_match_table, NULL, NULL);
-
-	/* Test that a missing irq domain returns -EPROBE_DEFER */
-	np = of_find_node_by_path("/testcase-data/testcase-device1");
-	pdev = of_find_device_by_node(np);
-	selftest(pdev, "device 1 creation failed\n");
-
-	irq = platform_get_irq(pdev, 0);
-	selftest(irq == -EPROBE_DEFER, "device deferred probe failed - %d\n", irq);
-
-	/* Test that a parsing failure does not return -EPROBE_DEFER */
-	np = of_find_node_by_path("/testcase-data/testcase-device2");
-	pdev = of_find_device_by_node(np);
-	selftest(pdev, "device 2 creation failed\n");
-	irq = platform_get_irq(pdev, 0);
-	selftest(irq < 0 && irq != -EPROBE_DEFER, "device parsing error failed - %d\n", irq);
-
-	if (selftest(np = of_find_node_by_path("/testcase-data/platform-tests"),
-		     "No testcase data in device tree\n"));
-		return;
-
-	if (selftest(!(rc = device_register(&test_bus)),
-		     "testbus registration failed; rc=%i\n", rc));
-		return;
-
-	for_each_child_of_node(np, child) {
-		of_platform_populate(child, match, NULL, &test_bus);
-		for_each_child_of_node(child, grandchild)
-			selftest(of_find_device_by_node(grandchild),
-				 "Could not create device for node '%s'\n",
-				 grandchild->name);
-	}
-
-	of_platform_depopulate(&test_bus);
-	for_each_child_of_node(np, child) {
-		for_each_child_of_node(child, grandchild)
-			selftest(!of_find_device_by_node(grandchild),
-				 "device didn't get destroyed '%s'\n",
-				 grandchild->name);
-	}
-
-	device_unregister(&test_bus);
-	of_node_put(np);
-}
-
-/**
- *	update_node_properties - adds the properties
- *	of np into dup node (present in live tree) and
- *	updates parent of children of np to dup.
- *
- *	@np:	node already present in live tree
- *	@dup:	node present in live tree to be updated
- */
-static void update_node_properties(struct device_node *np,
-					struct device_node *dup)
-{
-	struct property *prop;
-	struct device_node *child;
-
-	for_each_property_of_node(np, prop)
-		of_add_property(dup, prop);
-
-	for_each_child_of_node(np, child)
-		child->parent = dup;
-}
-
-/**
- *	attach_node_and_children - attaches nodes
- *	and its children to live tree
- *
- *	@np:	Node to attach to live tree
- */
-static int attach_node_and_children(struct device_node *np)
-{
-	struct device_node *next, *dup, *child;
-	unsigned long flags;
-
-	dup = of_find_node_by_path(np->full_name);
-	if (dup) {
-		update_node_properties(np, dup);
-		return 0;
-	}
-
-	child = np->child;
-	np->child = NULL;
-
-	mutex_lock(&of_mutex);
-	raw_spin_lock_irqsave(&devtree_lock, flags);
-	np->sibling = np->parent->child;
-	np->parent->child = np;
-	of_node_clear_flag(np, OF_DETACHED);
-	raw_spin_unlock_irqrestore(&devtree_lock, flags);
-
-	__of_attach_node_sysfs(np);
-	mutex_unlock(&of_mutex);
-
-	while (child) {
-		next = child->sibling;
-		attach_node_and_children(child);
-		child = next;
-	}
-
-	return 0;
-}
-
-/**
- *	selftest_data_add - Reads, copies data from
- *	linked tree and attaches it to the live tree
- */
-static int __init selftest_data_add(void)
-{
-	void *selftest_data;
-	struct device_node *selftest_data_node, *np;
-	extern uint8_t __dtb_testcases_begin[];
-	extern uint8_t __dtb_testcases_end[];
-	const int size = __dtb_testcases_end - __dtb_testcases_begin;
-	int rc;
-
-	if (!size) {
-		pr_warn("%s: No testcase data to attach; not running tests\n",
-			__func__);
-		return -ENODATA;
-	}
-
-	/* creating copy */
-	selftest_data = kmemdup(__dtb_testcases_begin, size, GFP_KERNEL);
-
-	if (!selftest_data) {
-		pr_warn("%s: Failed to allocate memory for selftest_data; "
-			"not running tests\n", __func__);
-		return -ENOMEM;
-	}
-	of_fdt_unflatten_tree(selftest_data, &selftest_data_node);
-	if (!selftest_data_node) {
-		pr_warn("%s: No tree to attach; not running tests\n", __func__);
-		return -ENODATA;
-	}
-	of_node_set_flag(selftest_data_node, OF_DETACHED);
-	rc = of_resolve_phandles(selftest_data_node);
-	if (rc) {
-		pr_err("%s: Failed to resolve phandles (rc=%i)\n", __func__, rc);
-		return -EINVAL;
-	}
-
-	if (!of_root) {
-		of_root = selftest_data_node;
-		for_each_of_allnodes(np)
-			__of_attach_node_sysfs(np);
-		of_aliases = of_find_node_by_path("/aliases");
-		of_chosen = of_find_node_by_path("/chosen");
-		return 0;
-	}
-
-	/* attach the sub-tree to live tree */
-	np = selftest_data_node->child;
-	while (np) {
-		struct device_node *next = np->sibling;
-		np->parent = of_root;
-		attach_node_and_children(np);
-		np = next;
-	}
-	return 0;
-}
-
-#ifdef CONFIG_OF_OVERLAY
-
-static int selftest_probe(struct platform_device *pdev)
-{
-	struct device *dev = &pdev->dev;
-	struct device_node *np = dev->of_node;
-
-	if (np == NULL) {
-		dev_err(dev, "No OF data for device\n");
-		return -EINVAL;
-
-	}
-
-	dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
-
-	of_platform_populate(np, NULL, NULL, &pdev->dev);
-
-	return 0;
-}
-
-static int selftest_remove(struct platform_device *pdev)
-{
-	struct device *dev = &pdev->dev;
-	struct device_node *np = dev->of_node;
-
-	dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
-	return 0;
-}
-
-static struct of_device_id selftest_match[] = {
-	{ .compatible = "selftest", },
-	{},
-};
-
-static struct platform_driver selftest_driver = {
-	.probe			= selftest_probe,
-	.remove			= selftest_remove,
-	.driver = {
-		.name		= "selftest",
-		.owner		= THIS_MODULE,
-		.of_match_table	= of_match_ptr(selftest_match),
-	},
-};
-
-/* get the platform device instantiated at the path */
-static struct platform_device *of_path_to_platform_device(const char *path)
-{
-	struct device_node *np;
-	struct platform_device *pdev;
-
-	np = of_find_node_by_path(path);
-	if (np == NULL)
-		return NULL;
-
-	pdev = of_find_device_by_node(np);
-	of_node_put(np);
-
-	return pdev;
-}
-
-/* find out if a platform device exists at that path */
-static int of_path_platform_device_exists(const char *path)
-{
-	struct platform_device *pdev;
-
-	pdev = of_path_to_platform_device(path);
-	platform_device_put(pdev);
-	return pdev != NULL;
-}
-
-#if IS_ENABLED(CONFIG_I2C)
-
-/* get the i2c client device instantiated at the path */
-static struct i2c_client *of_path_to_i2c_client(const char *path)
-{
-	struct device_node *np;
-	struct i2c_client *client;
-
-	np = of_find_node_by_path(path);
-	if (np == NULL)
-		return NULL;
-
-	client = of_find_i2c_device_by_node(np);
-	of_node_put(np);
-
-	return client;
-}
-
-/* find out if a i2c client device exists at that path */
-static int of_path_i2c_client_exists(const char *path)
-{
-	struct i2c_client *client;
-
-	client = of_path_to_i2c_client(path);
-	if (client)
-		put_device(&client->dev);
-	return client != NULL;
-}
-#else
-static int of_path_i2c_client_exists(const char *path)
-{
-	return 0;
-}
-#endif
-
-enum overlay_type {
-	PDEV_OVERLAY,
-	I2C_OVERLAY
-};
-
-static int of_path_device_type_exists(const char *path,
-		enum overlay_type ovtype)
-{
-	switch (ovtype) {
-	case PDEV_OVERLAY:
-		return of_path_platform_device_exists(path);
-	case I2C_OVERLAY:
-		return of_path_i2c_client_exists(path);
-	}
-	return 0;
-}
-
-static const char *selftest_path(int nr, enum overlay_type ovtype)
-{
-	const char *base;
-	static char buf[256];
-
-	switch (ovtype) {
-	case PDEV_OVERLAY:
-		base = "/testcase-data/overlay-node/test-bus";
-		break;
-	case I2C_OVERLAY:
-		base = "/testcase-data/overlay-node/test-bus/i2c-test-bus";
-		break;
-	default:
-		buf[0] = '\0';
-		return buf;
-	}
-	snprintf(buf, sizeof(buf) - 1, "%s/test-selftest%d", base, nr);
-	buf[sizeof(buf) - 1] = '\0';
-	return buf;
-}
-
-static int of_selftest_device_exists(int selftest_nr, enum overlay_type ovtype)
-{
-	const char *path;
-
-	path = selftest_path(selftest_nr, ovtype);
-
-	switch (ovtype) {
-	case PDEV_OVERLAY:
-		return of_path_platform_device_exists(path);
-	case I2C_OVERLAY:
-		return of_path_i2c_client_exists(path);
-	}
-	return 0;
-}
-
-static const char *overlay_path(int nr)
-{
-	static char buf[256];
-
-	snprintf(buf, sizeof(buf) - 1,
-		"/testcase-data/overlay%d", nr);
-	buf[sizeof(buf) - 1] = '\0';
-
-	return buf;
-}
-
-static const char *bus_path = "/testcase-data/overlay-node/test-bus";
-
-static int of_selftest_apply_overlay(int selftest_nr, int overlay_nr,
-		int *overlay_id)
-{
-	struct device_node *np = NULL;
-	int ret, id = -1;
-
-	np = of_find_node_by_path(overlay_path(overlay_nr));
-	if (np == NULL) {
-		selftest(0, "could not find overlay node @\"%s\"\n",
-				overlay_path(overlay_nr));
-		ret = -EINVAL;
-		goto out;
-	}
-
-	ret = of_overlay_create(np);
-	if (ret < 0) {
-		selftest(0, "could not create overlay from \"%s\"\n",
-				overlay_path(overlay_nr));
-		goto out;
-	}
-	id = ret;
-
-	ret = 0;
-
-out:
-	of_node_put(np);
-
-	if (overlay_id)
-		*overlay_id = id;
-
-	return ret;
-}
-
-/* apply an overlay while checking before and after states */
-static int of_selftest_apply_overlay_check(int overlay_nr, int selftest_nr,
-		int before, int after, enum overlay_type ovtype)
-{
-	int ret;
-
-	/* selftest device must not be in before state */
-	if (of_selftest_device_exists(selftest_nr, ovtype) != before) {
-		selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
-				overlay_path(overlay_nr),
-				selftest_path(selftest_nr, ovtype),
-				!before ? "enabled" : "disabled");
-		return -EINVAL;
-	}
-
-	ret = of_selftest_apply_overlay(overlay_nr, selftest_nr, NULL);
-	if (ret != 0) {
-		/* of_selftest_apply_overlay already called selftest() */
-		return ret;
-	}
-
-	/* selftest device must be to set to after state */
-	if (of_selftest_device_exists(selftest_nr, ovtype) != after) {
-		selftest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n",
-				overlay_path(overlay_nr),
-				selftest_path(selftest_nr, ovtype),
-				!after ? "enabled" : "disabled");
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
-/* apply an overlay and then revert it while checking before, after states */
-static int of_selftest_apply_revert_overlay_check(int overlay_nr,
-		int selftest_nr, int before, int after,
-		enum overlay_type ovtype)
-{
-	int ret, ov_id;
-
-	/* selftest device must be in before state */
-	if (of_selftest_device_exists(selftest_nr, ovtype) != before) {
-		selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
-				overlay_path(overlay_nr),
-				selftest_path(selftest_nr, ovtype),
-				!before ? "enabled" : "disabled");
-		return -EINVAL;
-	}
-
-	/* apply the overlay */
-	ret = of_selftest_apply_overlay(overlay_nr, selftest_nr, &ov_id);
-	if (ret != 0) {
-		/* of_selftest_apply_overlay already called selftest() */
-		return ret;
-	}
-
-	/* selftest device must be in after state */
-	if (of_selftest_device_exists(selftest_nr, ovtype) != after) {
-		selftest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n",
-				overlay_path(overlay_nr),
-				selftest_path(selftest_nr, ovtype),
-				!after ? "enabled" : "disabled");
-		return -EINVAL;
-	}
-
-	ret = of_overlay_destroy(ov_id);
-	if (ret != 0) {
-		selftest(0, "overlay @\"%s\" failed to be destroyed @\"%s\"\n",
-				overlay_path(overlay_nr),
-				selftest_path(selftest_nr, ovtype));
-		return ret;
-	}
-
-	/* selftest device must be again in before state */
-	if (of_selftest_device_exists(selftest_nr, PDEV_OVERLAY) != before) {
-		selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
-				overlay_path(overlay_nr),
-				selftest_path(selftest_nr, ovtype),
-				!before ? "enabled" : "disabled");
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
-/* test activation of device */
-static void of_selftest_overlay_0(void)
-{
-	int ret;
-
-	/* device should enable */
-	ret = of_selftest_apply_overlay_check(0, 0, 0, 1, PDEV_OVERLAY);
-	if (ret != 0)
-		return;
-
-	selftest(1, "overlay test %d passed\n", 0);
-}
-
-/* test deactivation of device */
-static void of_selftest_overlay_1(void)
-{
-	int ret;
-
-	/* device should disable */
-	ret = of_selftest_apply_overlay_check(1, 1, 1, 0, PDEV_OVERLAY);
-	if (ret != 0)
-		return;
-
-	selftest(1, "overlay test %d passed\n", 1);
-}
-
-/* test activation of device */
-static void of_selftest_overlay_2(void)
-{
-	int ret;
-
-	/* device should enable */
-	ret = of_selftest_apply_overlay_check(2, 2, 0, 1, PDEV_OVERLAY);
-	if (ret != 0)
-		return;
-
-	selftest(1, "overlay test %d passed\n", 2);
-}
-
-/* test deactivation of device */
-static void of_selftest_overlay_3(void)
-{
-	int ret;
-
-	/* device should disable */
-	ret = of_selftest_apply_overlay_check(3, 3, 1, 0, PDEV_OVERLAY);
-	if (ret != 0)
-		return;
-
-	selftest(1, "overlay test %d passed\n", 3);
-}
-
-/* test activation of a full device node */
-static void of_selftest_overlay_4(void)
-{
-	int ret;
-
-	/* device should disable */
-	ret = of_selftest_apply_overlay_check(4, 4, 0, 1, PDEV_OVERLAY);
-	if (ret != 0)
-		return;
-
-	selftest(1, "overlay test %d passed\n", 4);
-}
-
-/* test overlay apply/revert sequence */
-static void of_selftest_overlay_5(void)
-{
-	int ret;
-
-	/* device should disable */
-	ret = of_selftest_apply_revert_overlay_check(5, 5, 0, 1, PDEV_OVERLAY);
-	if (ret != 0)
-		return;
-
-	selftest(1, "overlay test %d passed\n", 5);
-}
-
-/* test overlay application in sequence */
-static void of_selftest_overlay_6(void)
-{
-	struct device_node *np;
-	int ret, i, ov_id[2];
-	int overlay_nr = 6, selftest_nr = 6;
-	int before = 0, after = 1;
-
-	/* selftest device must be in before state */
-	for (i = 0; i < 2; i++) {
-		if (of_selftest_device_exists(selftest_nr + i, PDEV_OVERLAY)
-				!= before) {
-			selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
-					overlay_path(overlay_nr + i),
-					selftest_path(selftest_nr + i,
-						PDEV_OVERLAY),
-					!before ? "enabled" : "disabled");
-			return;
-		}
-	}
-
-	/* apply the overlays */
-	for (i = 0; i < 2; i++) {
-
-		np = of_find_node_by_path(overlay_path(overlay_nr + i));
-		if (np == NULL) {
-			selftest(0, "could not find overlay node @\"%s\"\n",
-					overlay_path(overlay_nr + i));
-			return;
-		}
-
-		ret = of_overlay_create(np);
-		if (ret < 0)  {
-			selftest(0, "could not create overlay from \"%s\"\n",
-					overlay_path(overlay_nr + i));
-			return;
-		}
-		ov_id[i] = ret;
-	}
-
-	for (i = 0; i < 2; i++) {
-		/* selftest device must be in after state */
-		if (of_selftest_device_exists(selftest_nr + i, PDEV_OVERLAY)
-				!= after) {
-			selftest(0, "overlay @\"%s\" failed @\"%s\" %s\n",
-					overlay_path(overlay_nr + i),
-					selftest_path(selftest_nr + i,
-						PDEV_OVERLAY),
-					!after ? "enabled" : "disabled");
-			return;
-		}
-	}
-
-	for (i = 1; i >= 0; i--) {
-		ret = of_overlay_destroy(ov_id[i]);
-		if (ret != 0) {
-			selftest(0, "overlay @\"%s\" failed destroy @\"%s\"\n",
-					overlay_path(overlay_nr + i),
-					selftest_path(selftest_nr + i,
-						PDEV_OVERLAY));
-			return;
-		}
-	}
-
-	for (i = 0; i < 2; i++) {
-		/* selftest device must be again in before state */
-		if (of_selftest_device_exists(selftest_nr + i, PDEV_OVERLAY)
-				!= before) {
-			selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
-					overlay_path(overlay_nr + i),
-					selftest_path(selftest_nr + i,
-						PDEV_OVERLAY),
-					!before ? "enabled" : "disabled");
-			return;
-		}
-	}
-
-	selftest(1, "overlay test %d passed\n", 6);
-}
-
-/* test overlay application in sequence */
-static void of_selftest_overlay_8(void)
-{
-	struct device_node *np;
-	int ret, i, ov_id[2];
-	int overlay_nr = 8, selftest_nr = 8;
-
-	/* we don't care about device state in this test */
-
-	/* apply the overlays */
-	for (i = 0; i < 2; i++) {
-
-		np = of_find_node_by_path(overlay_path(overlay_nr + i));
-		if (np == NULL) {
-			selftest(0, "could not find overlay node @\"%s\"\n",
-					overlay_path(overlay_nr + i));
-			return;
-		}
-
-		ret = of_overlay_create(np);
-		if (ret < 0)  {
-			selftest(0, "could not create overlay from \"%s\"\n",
-					overlay_path(overlay_nr + i));
-			return;
-		}
-		ov_id[i] = ret;
-	}
-
-	/* now try to remove first overlay (it should fail) */
-	ret = of_overlay_destroy(ov_id[0]);
-	if (ret == 0) {
-		selftest(0, "overlay @\"%s\" was destroyed @\"%s\"\n",
-				overlay_path(overlay_nr + 0),
-				selftest_path(selftest_nr,
-					PDEV_OVERLAY));
-		return;
-	}
-
-	/* removing them in order should work */
-	for (i = 1; i >= 0; i--) {
-		ret = of_overlay_destroy(ov_id[i]);
-		if (ret != 0) {
-			selftest(0, "overlay @\"%s\" not destroyed @\"%s\"\n",
-					overlay_path(overlay_nr + i),
-					selftest_path(selftest_nr,
-						PDEV_OVERLAY));
-			return;
-		}
-	}
-
-	selftest(1, "overlay test %d passed\n", 8);
-}
-
-/* test insertion of a bus with parent devices */
-static void of_selftest_overlay_10(void)
-{
-	int ret;
-	char *child_path;
-
-	/* device should disable */
-	ret = of_selftest_apply_overlay_check(10, 10, 0, 1, PDEV_OVERLAY);
-	if (selftest(ret == 0,
-			"overlay test %d failed; overlay application\n", 10))
-		return;
-
-	child_path = kasprintf(GFP_KERNEL, "%s/test-selftest101",
-			selftest_path(10, PDEV_OVERLAY));
-	if (selftest(child_path, "overlay test %d failed; kasprintf\n", 10))
-		return;
-
-	ret = of_path_device_type_exists(child_path, PDEV_OVERLAY);
-	kfree(child_path);
-	if (selftest(ret, "overlay test %d failed; no child device\n", 10))
-		return;
-}
-
-/* test insertion of a bus with parent devices (and revert) */
-static void of_selftest_overlay_11(void)
-{
-	int ret;
-
-	/* device should disable */
-	ret = of_selftest_apply_revert_overlay_check(11, 11, 0, 1,
-			PDEV_OVERLAY);
-	if (selftest(ret == 0,
-			"overlay test %d failed; overlay application\n", 11))
-		return;
-}
-
-#if IS_ENABLED(CONFIG_I2C) && IS_ENABLED(CONFIG_OF_OVERLAY)
-
-struct selftest_i2c_bus_data {
-	struct platform_device	*pdev;
-	struct i2c_adapter	adap;
-};
-
-static int selftest_i2c_master_xfer(struct i2c_adapter *adap,
-		struct i2c_msg *msgs, int num)
-{
-	struct selftest_i2c_bus_data *std = i2c_get_adapdata(adap);
-
-	(void)std;
-
-	return num;
-}
-
-static u32 selftest_i2c_functionality(struct i2c_adapter *adap)
-{
-	return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
-}
-
-static const struct i2c_algorithm selftest_i2c_algo = {
-	.master_xfer	= selftest_i2c_master_xfer,
-	.functionality	= selftest_i2c_functionality,
-};
-
-static int selftest_i2c_bus_probe(struct platform_device *pdev)
-{
-	struct device *dev = &pdev->dev;
-	struct device_node *np = dev->of_node;
-	struct selftest_i2c_bus_data *std;
-	struct i2c_adapter *adap;
-	int ret;
-
-	if (np == NULL) {
-		dev_err(dev, "No OF data for device\n");
-		return -EINVAL;
-
-	}
-
-	dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
-
-	std = devm_kzalloc(dev, sizeof(*std), GFP_KERNEL);
-	if (!std) {
-		dev_err(dev, "Failed to allocate selftest i2c data\n");
-		return -ENOMEM;
-	}
-
-	/* link them together */
-	std->pdev = pdev;
-	platform_set_drvdata(pdev, std);
-
-	adap = &std->adap;
-	i2c_set_adapdata(adap, std);
-	adap->nr = -1;
-	strlcpy(adap->name, pdev->name, sizeof(adap->name));
-	adap->class = I2C_CLASS_DEPRECATED;
-	adap->algo = &selftest_i2c_algo;
-	adap->dev.parent = dev;
-	adap->dev.of_node = dev->of_node;
-	adap->timeout = 5 * HZ;
-	adap->retries = 3;
-
-	ret = i2c_add_numbered_adapter(adap);
-	if (ret != 0) {
-		dev_err(dev, "Failed to add I2C adapter\n");
-		return ret;
-	}
-
-	return 0;
-}
-
-static int selftest_i2c_bus_remove(struct platform_device *pdev)
-{
-	struct device *dev = &pdev->dev;
-	struct device_node *np = dev->of_node;
-	struct selftest_i2c_bus_data *std = platform_get_drvdata(pdev);
-
-	dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
-	i2c_del_adapter(&std->adap);
-
-	return 0;
-}
-
-static struct of_device_id selftest_i2c_bus_match[] = {
-	{ .compatible = "selftest-i2c-bus", },
-	{},
-};
-
-static struct platform_driver selftest_i2c_bus_driver = {
-	.probe			= selftest_i2c_bus_probe,
-	.remove			= selftest_i2c_bus_remove,
-	.driver = {
-		.name		= "selftest-i2c-bus",
-		.of_match_table	= of_match_ptr(selftest_i2c_bus_match),
-	},
-};
-
-static int selftest_i2c_dev_probe(struct i2c_client *client,
-		const struct i2c_device_id *id)
-{
-	struct device *dev = &client->dev;
-	struct device_node *np = client->dev.of_node;
-
-	if (!np) {
-		dev_err(dev, "No OF node\n");
-		return -EINVAL;
-	}
-
-	dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
-
-	return 0;
-};
-
-static int selftest_i2c_dev_remove(struct i2c_client *client)
-{
-	struct device *dev = &client->dev;
-	struct device_node *np = client->dev.of_node;
-
-	dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
-	return 0;
-}
-
-static const struct i2c_device_id selftest_i2c_dev_id[] = {
-	{ .name = "selftest-i2c-dev" },
-	{ }
-};
-
-static struct i2c_driver selftest_i2c_dev_driver = {
-	.driver = {
-		.name = "selftest-i2c-dev",
-		.owner = THIS_MODULE,
-	},
-	.probe = selftest_i2c_dev_probe,
-	.remove = selftest_i2c_dev_remove,
-	.id_table = selftest_i2c_dev_id,
-};
-
-#if IS_ENABLED(CONFIG_I2C_MUX)
-
-struct selftest_i2c_mux_data {
-	int nchans;
-	struct i2c_adapter *adap[];
-};
-
-static int selftest_i2c_mux_select_chan(struct i2c_adapter *adap,
-			       void *client, u32 chan)
-{
-	return 0;
-}
-
-static int selftest_i2c_mux_probe(struct i2c_client *client,
-		const struct i2c_device_id *id)
-{
-	int ret, i, nchans, size;
-	struct device *dev = &client->dev;
-	struct i2c_adapter *adap = to_i2c_adapter(dev->parent);
-	struct device_node *np = client->dev.of_node, *child;
-	struct selftest_i2c_mux_data *stm;
-	u32 reg, max_reg;
-
-	dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
-
-	if (!np) {
-		dev_err(dev, "No OF node\n");
-		return -EINVAL;
-	}
-
-	max_reg = (u32)-1;
-	for_each_child_of_node(np, child) {
-		ret = of_property_read_u32(child, "reg", &reg);
-		if (ret)
-			continue;
-		if (max_reg == (u32)-1 || reg > max_reg)
-			max_reg = reg;
-	}
-	nchans = max_reg == (u32)-1 ? 0 : max_reg + 1;
-	if (nchans == 0) {
-		dev_err(dev, "No channels\n");
-		return -EINVAL;
-	}
-
-	size = offsetof(struct selftest_i2c_mux_data, adap[nchans]);
-	stm = devm_kzalloc(dev, size, GFP_KERNEL);
-	if (!stm) {
-		dev_err(dev, "Out of memory\n");
-		return -ENOMEM;
-	}
-	stm->nchans = nchans;
-	for (i = 0; i < nchans; i++) {
-		stm->adap[i] = i2c_add_mux_adapter(adap, dev, client,
-				0, i, 0, selftest_i2c_mux_select_chan, NULL);
-		if (!stm->adap[i]) {
-			dev_err(dev, "Failed to register mux #%d\n", i);
-			for (i--; i >= 0; i--)
-				i2c_del_mux_adapter(stm->adap[i]);
-			return -ENODEV;
-		}
-	}
-
-	i2c_set_clientdata(client, stm);
-
-	return 0;
-};
-
-static int selftest_i2c_mux_remove(struct i2c_client *client)
-{
-	struct device *dev = &client->dev;
-	struct device_node *np = client->dev.of_node;
-	struct selftest_i2c_mux_data *stm = i2c_get_clientdata(client);
-	int i;
-
-	dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
-	for (i = stm->nchans - 1; i >= 0; i--)
-		i2c_del_mux_adapter(stm->adap[i]);
-	return 0;
-}
-
-static const struct i2c_device_id selftest_i2c_mux_id[] = {
-	{ .name = "selftest-i2c-mux" },
-	{ }
-};
-
-static struct i2c_driver selftest_i2c_mux_driver = {
-	.driver = {
-		.name = "selftest-i2c-mux",
-		.owner = THIS_MODULE,
-	},
-	.probe = selftest_i2c_mux_probe,
-	.remove = selftest_i2c_mux_remove,
-	.id_table = selftest_i2c_mux_id,
-};
-
-#endif
-
-static int of_selftest_overlay_i2c_init(void)
-{
-	int ret;
-
-	ret = i2c_add_driver(&selftest_i2c_dev_driver);
-	if (selftest(ret == 0,
-			"could not register selftest i2c device driver\n"))
-		return ret;
-
-	ret = platform_driver_register(&selftest_i2c_bus_driver);
-	if (selftest(ret == 0,
-			"could not register selftest i2c bus driver\n"))
-		return ret;
-
-#if IS_ENABLED(CONFIG_I2C_MUX)
-	ret = i2c_add_driver(&selftest_i2c_mux_driver);
-	if (selftest(ret == 0,
-			"could not register selftest i2c mux driver\n"))
-		return ret;
-#endif
-
-	return 0;
-}
-
-static void of_selftest_overlay_i2c_cleanup(void)
-{
-#if IS_ENABLED(CONFIG_I2C_MUX)
-	i2c_del_driver(&selftest_i2c_mux_driver);
-#endif
-	platform_driver_unregister(&selftest_i2c_bus_driver);
-	i2c_del_driver(&selftest_i2c_dev_driver);
-}
-
-static void of_selftest_overlay_i2c_12(void)
-{
-	int ret;
-
-	/* device should enable */
-	ret = of_selftest_apply_overlay_check(12, 12, 0, 1, I2C_OVERLAY);
-	if (ret != 0)
-		return;
-
-	selftest(1, "overlay test %d passed\n", 12);
-}
-
-/* test deactivation of device */
-static void of_selftest_overlay_i2c_13(void)
-{
-	int ret;
-
-	/* device should disable */
-	ret = of_selftest_apply_overlay_check(13, 13, 1, 0, I2C_OVERLAY);
-	if (ret != 0)
-		return;
-
-	selftest(1, "overlay test %d passed\n", 13);
-}
-
-/* just check for i2c mux existence */
-static void of_selftest_overlay_i2c_14(void)
-{
-}
-
-static void of_selftest_overlay_i2c_15(void)
-{
-	int ret;
-
-	/* device should enable */
-	ret = of_selftest_apply_overlay_check(16, 15, 0, 1, I2C_OVERLAY);
-	if (ret != 0)
-		return;
-
-	selftest(1, "overlay test %d passed\n", 15);
-}
-
-#else
-
-static inline void of_selftest_overlay_i2c_14(void) { }
-static inline void of_selftest_overlay_i2c_15(void) { }
-
-#endif
-
-static void __init of_selftest_overlay(void)
-{
-	struct device_node *bus_np = NULL;
-	int ret;
-
-	ret = platform_driver_register(&selftest_driver);
-	if (ret != 0) {
-		selftest(0, "could not register selftest driver\n");
-		goto out;
-	}
-
-	bus_np = of_find_node_by_path(bus_path);
-	if (bus_np == NULL) {
-		selftest(0, "could not find bus_path \"%s\"\n", bus_path);
-		goto out;
-	}
-
-	ret = of_platform_populate(bus_np, of_default_bus_match_table,
-			NULL, NULL);
-	if (ret != 0) {
-		selftest(0, "could not populate bus @ \"%s\"\n", bus_path);
-		goto out;
-	}
-
-	if (!of_selftest_device_exists(100, PDEV_OVERLAY)) {
-		selftest(0, "could not find selftest0 @ \"%s\"\n",
-				selftest_path(100, PDEV_OVERLAY));
-		goto out;
-	}
-
-	if (of_selftest_device_exists(101, PDEV_OVERLAY)) {
-		selftest(0, "selftest1 @ \"%s\" should not exist\n",
-				selftest_path(101, PDEV_OVERLAY));
-		goto out;
-	}
-
-	selftest(1, "basic infrastructure of overlays passed");
-
-	/* tests in sequence */
-	of_selftest_overlay_0();
-	of_selftest_overlay_1();
-	of_selftest_overlay_2();
-	of_selftest_overlay_3();
-	of_selftest_overlay_4();
-	of_selftest_overlay_5();
-	of_selftest_overlay_6();
-	of_selftest_overlay_8();
-
-	of_selftest_overlay_10();
-	of_selftest_overlay_11();
-
-#if IS_ENABLED(CONFIG_I2C)
-	if (selftest(of_selftest_overlay_i2c_init() == 0, "i2c init failed\n"))
-		goto out;
-
-	of_selftest_overlay_i2c_12();
-	of_selftest_overlay_i2c_13();
-	of_selftest_overlay_i2c_14();
-	of_selftest_overlay_i2c_15();
-
-	of_selftest_overlay_i2c_cleanup();
-#endif
-
-out:
-	of_node_put(bus_np);
-}
-
-#else
-static inline void __init of_selftest_overlay(void) { }
-#endif
-
-static int __init of_selftest(void)
-{
-	struct device_node *np;
-	int res;
-
-	/* adding data for selftest */
-	res = selftest_data_add();
-	if (res)
-		return res;
-	if (!of_aliases)
-		of_aliases = of_find_node_by_path("/aliases");
-
-	np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
-	if (!np) {
-		pr_info("No testcase data in device tree; not running tests\n");
-		return 0;
-	}
-	of_node_put(np);
-
-	pr_info("start of selftest - you will see error messages\n");
-	of_selftest_check_tree_linkage();
-	of_selftest_check_phandles();
-	of_selftest_find_node_by_name();
-	of_selftest_dynamic();
-	of_selftest_parse_phandle_with_args();
-	of_selftest_property_string();
-	of_selftest_property_copy();
-	of_selftest_changeset();
-	of_selftest_parse_interrupts();
-	of_selftest_parse_interrupts_extended();
-	of_selftest_match_node();
-	of_selftest_platform_populate();
-	of_selftest_overlay();
-
-	/* Double check linkage after removing testcase data */
-	of_selftest_check_tree_linkage();
-
-	pr_info("end of selftest - %i passed, %i failed\n",
-		selftest_results.passed, selftest_results.failed);
-
-	return 0;
-}
-late_initcall(of_selftest);

[Patch v2 3/3] dt: OF_UNITTEST make dependency broken, fix unittest.c after move

[Frank Rowand]

From: Frank Rowand <frank.rowand@sonymobile.com>

Fix an of_unittest.c include path to account for the move of
unittest.c into unittest-data/.

Signed-off-by: Frank Rowand <frank.rowand@sonymobile.com>

---
 drivers/of/unittest-data/unittest.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: b/drivers/of/unittest-data/unittest.c
===================================================================
--- a/drivers/of/unittest-data/unittest.c
+++ b/drivers/of/unittest-data/unittest.c
@@ -23,7 +23,7 @@
 #include <linux/i2c.h>
 #include <linux/i2c-mux.h>
 
-#include "of_private.h"
+#include "../of_private.h"
 
 static struct selftest_results {
 	int passed;