[RFC 5/5] drivers: Code to test boot constraints

Viresh Kumar
2017-06-28T10:26:38Z

NOT FOR MERGE

This is test code to show how this is tested for now on the hikey
platform with the MMC device.

Not-signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
drivers/base/Makefile | 2 +-
drivers/base/test_plat_boot_constraint.c | 51 ++++++++++++++++++++++++++++++++
2 files changed, 52 insertions(+), 1 deletion(-)
create mode 100644 drivers/base/test_plat_boot_constraint.c

diff --git a/drivers/base/Makefile b/drivers/base/Makefile
index 6094b3b75184..a1ffa9f1a0b6 100644
--- a/drivers/base/Makefile
+++ b/drivers/base/Makefile
@@ -5,7 +5,7 @@ obj-y := component.o core.o bus.o dd.o syscore.o \
cpu.o firmware.o init.o map.o devres.o \
attribute_container.o transport_class.o \
topology.o container.o property.o cacheinfo.o
-obj-$(CONFIG_BOOT_CONSTRAINTS) += boot_constraint.o
+obj-$(CONFIG_BOOT_CONSTRAINTS) += boot_constraint.o test_plat_boot_constraint.o
obj-$(CONFIG_DEVTMPFS) += devtmpfs.o
obj-$(CONFIG_DMA_CMA) += dma-contiguous.o
obj-y += power/
diff --git a/drivers/base/test_plat_boot_constraint.c b/drivers/base/test_plat_boot_constraint.c
new file mode 100644
index 000000000000..498f87056409
--- /dev/null
+++ b/drivers/base/test_plat_boot_constraint.c
@@ -0,0 +1,51 @@
+#include <linux/boot_constraint.h>
+#include <linux/device.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+
+static int test_constraints_probe(struct platform_device *platform_dev)
+{
+ struct device_node *np;
+ struct boot_constraint_supply_info info = {
+ .enable = true,
+ .name = "vmmc",
+ .u_volt_min = 1800000,
+ .u_volt_max = 3000000,
+ };
+ struct platform_device *pdev;
+ int ret;
+
+ np = of_find_compatible_node(NULL, NULL, "hisilicon,hi6220-dw-mshc");
+ if (!np)
+ return -ENODEV;
+
+ pdev = of_find_device_by_node(np);
+ of_node_put(np);
+
+ if (!pdev) {
+ pr_err("%s: device not found\n", __func__);
+ return -ENODEV;
+ }
+
+ ret = boot_constraint_add(&pdev->dev, BOOT_CONSTRAINT_SUPPLY, &info);
+ if (ret)
+ return ret;
+
+ return ret;
+}
+
+static struct platform_driver test_constraints_driver = {
+ .driver = {
+ .name = "test-constraints",
+ },
+ .probe = test_constraints_probe,
+};
+
+static int __init test_constraints_init(void)
+{
+ platform_device_register_data(NULL, "test-constraints", -1, NULL, 0);
+
+ return platform_driver_register(&test_constraints_driver);
+}
+subsys_initcall(test_constraints_init);
--
2.13.0.71.gd7076ec9c9cb