[PATCH 4/9] sparc: make drivers/of/pdt.c no longer sparc-only

Andres Salomon
2010-08-30T03:57:25Z

Clean up pdt.c:
- make build dependent upon config OF_PROMTREE
- #ifdef out the sparc-specific stuff
- create pdt-specific header

Signed-off-by: Andres Salomon <dilinger@queued.net>
---
arch/sparc/Kconfig | 1 +
arch/sparc/include/asm/prom.h | 5 ++-
arch/sparc/kernel/prom.h | 6 ----
arch/sparc/kernel/prom_common.c | 10 ++++++-
drivers/of/Kconfig | 5 +++-
drivers/of/Makefile | 1 +
drivers/of/pdt.c | 55 +++++++++++++++++++++++++++-----------
include/linux/of_pdt.h | 24 +++++++++++++++++
8 files changed, 81 insertions(+), 26 deletions(-)
create mode 100644 include/linux/of_pdt.h

diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index 491e9d6..a06c959 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -19,6 +19,7 @@ config SPARC
bool
default y
select OF
+ select OF_PROMTREE
select HAVE_IDE
select HAVE_OPROFILE
select HAVE_ARCH_KGDB if !SMP || SPARC64
diff --git a/arch/sparc/include/asm/prom.h b/arch/sparc/include/asm/prom.h
index 291f125..56bbaad 100644
--- a/arch/sparc/include/asm/prom.h
+++ b/arch/sparc/include/asm/prom.h
@@ -18,6 +18,7 @@
* 2 of the License, or (at your option) any later version.
*/
#include <linux/types.h>
+#include <linux/of_pdt.h>
#include <linux/proc_fs.h>
#include <linux/mutex.h>
#include <asm/atomic.h>
@@ -67,8 +68,8 @@ extern struct device_node *of_console_device;
extern char *of_console_path;
extern char *of_console_options;

-extern void (*prom_build_more)(struct device_node *dp, struct device_node ***nextp);
-extern char *build_full_name(struct device_node *dp);
+extern void irq_trans_init(struct device_node *dp);
+extern char *build_path_component(struct device_node *dp);

#endif /* __KERNEL__ */
#endif /* _SPARC_PROM_H */
diff --git a/arch/sparc/kernel/prom.h b/arch/sparc/kernel/prom.h
index eeb04a7..cf5fe1c 100644
--- a/arch/sparc/kernel/prom.h
+++ b/arch/sparc/kernel/prom.h
@@ -4,12 +4,6 @@
#include <linux/spinlock.h>
#include <asm/prom.h>

-extern void * prom_early_alloc(unsigned long size);
-extern void irq_trans_init(struct device_node *dp);
-
-extern unsigned int prom_unique_id;
-
-extern char *build_path_component(struct device_node *dp);
extern void of_console_init(void);

extern unsigned int prom_early_allocated;
diff --git a/arch/sparc/kernel/prom_common.c b/arch/sparc/kernel/prom_common.c
index 7b454f6..fe84d56 100644
--- a/arch/sparc/kernel/prom_common.c
+++ b/arch/sparc/kernel/prom_common.c
@@ -20,6 +20,7 @@
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/of.h>
+#include <linux/of_pdt.h>
#include <asm/prom.h>
#include <asm/oplib.h>
#include <asm/leon.h>
@@ -119,4 +120,11 @@ EXPORT_SYMBOL(of_find_in_proplist);

unsigned int prom_early_allocated __initdata;

-#include "../../../drivers/of/pdt.c"
+void __init prom_build_devicetree(void)
+{
+ of_pdt_build_devicetree(prom_root_node);
+ of_console_init();
+
+ pr_info("PROM: Built device tree with %u bytes of memory.\n",
+ prom_early_allocated);
+}
diff --git a/drivers/of/Kconfig b/drivers/of/Kconfig
index 6acbff3..aa675eb 100644
--- a/drivers/of/Kconfig
+++ b/drivers/of/Kconfig
@@ -4,7 +4,7 @@ config DTC
config OF
bool

-menu "Flattened Device Tree and Open Firmware support"
+menu "Device Tree and Open Firmware support"
depends on OF

config PROC_DEVICETREE
@@ -19,6 +19,9 @@ config OF_FLATTREE
bool
select DTC

+config OF_PROMTREE
+ bool
+
config OF_DYNAMIC
def_bool y
depends on PPC_OF
diff --git a/drivers/of/Makefile b/drivers/of/Makefile
index 0052c40..7888155 100644
--- a/drivers/of/Makefile
+++ b/drivers/of/Makefile
@@ -1,5 +1,6 @@
obj-y = base.o
obj-$(CONFIG_OF_FLATTREE) += fdt.o
+obj-$(CONFIG_OF_PROMTREE) += pdt.o
obj-$(CONFIG_OF_ADDRESS) += address.o
obj-$(CONFIG_OF_IRQ) += irq.o
obj-$(CONFIG_OF_DEVICE) += device.o platform.o
diff --git a/drivers/of/pdt.c b/drivers/of/pdt.c
index c3c2d70..f0872b6 100644
--- a/drivers/of/pdt.c
+++ b/drivers/of/pdt.c
@@ -1,4 +1,4 @@
-/* prom_common.c: OF device tree support common code.
+/* pdt.c: OF PROM device tree support code.
*
* Paul Mackerras August 1996.
* Copyright (C) 1996-2005 Paul Mackerras.
@@ -7,6 +7,7 @@
* {engebret|bergner}@us.ibm.com
*
* Adapted for sparc by David S. Miller davem@davemloft.net
+ * Adapted for multiple architectures by Andres Salomon <dilinger@queued.net>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
@@ -20,13 +21,35 @@
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/of.h>
+#include <linux/of_pdt.h>
#include <asm/prom.h>
-#include <asm/oplib.h>
-#include <asm/leon.h>

-void (*prom_build_more)(struct device_node *dp, struct device_node ***nextp);
+void __initdata (*prom_build_more)(struct device_node *dp,
+ struct device_node ***nextp);

-unsigned int prom_unique_id;
+#if defined(CONFIG_SPARC)
+unsigned int of_pdt_unique_id __initdata;
+
+#define of_pdt_incr_unique_id(p) do { \
+ (p)->unique_id = of_pdt_unique_id++; \
+} while (0)
+
+static inline const char *of_pdt_node_name(struct device_node *dp)
+{
+ return dp->path_component_name;
+}
+
+#else
+
+static inline void of_pdt_incr_unique_id(void *p) { }
+static inline void irq_trans_init(struct device_node *dp) { }
+
+static inline const char *of_pdt_node_name(struct device_node *dp)
+{
+ return dp->name;
+}
+
+#endif /* !CONFIG_SPARC */

static struct property * __init build_one_prop(phandle node, char *prev,
char *special_name,
@@ -43,7 +66,7 @@ static struct property * __init build_one_prop(phandle node, char *prev,
tmp = NULL;
} else {
p = prom_early_alloc(sizeof(struct property) + 32);
- p->unique_id = prom_unique_id++;
+ of_pdt_incr_unique_id(p);
}

p->name = (char *) (p + 1);
@@ -124,7 +147,7 @@ static struct device_node * __init prom_create_node(phandle node,
return NULL;

dp = prom_early_alloc(sizeof(*dp));
- dp->unique_id = prom_unique_id++;
+ of_pdt_incr_unique_id(dp);
dp->parent = parent;

kref_init(&dp->kref);
@@ -140,13 +163,13 @@ static struct device_node * __init prom_create_node(phandle node,
return dp;
}

-char * __init build_full_name(struct device_node *dp)
+static char * __init build_full_name(struct device_node *dp)
{
int len, ourlen, plen;
char *n;

plen = strlen(dp->parent->full_name);
- ourlen = strlen(dp->path_component_name);
+ ourlen = strlen(of_pdt_node_name(dp));
len = ourlen + plen + 2;

n = prom_early_alloc(len);
@@ -155,7 +178,7 @@ char * __init build_full_name(struct device_node *dp)
strcpy(n + plen, "/");
plen++;
}
- strcpy(n + plen, dp->path_component_name);
+ strcpy(n + plen, of_pdt_node_name(dp));

return n;
}
@@ -182,7 +205,9 @@ static struct device_node * __init prom_build_tree(struct device_node *parent,
*(*nextp) = dp;
*nextp = &dp->allnext;

+#if defined(CONFIG_SPARC)
dp->path_component_name = build_path_component(dp);
+#endif
dp->full_name = build_full_name(dp);

dp->child = prom_build_tree(dp, prom_getchild(node), nextp);
@@ -196,20 +221,18 @@ static struct device_node * __init prom_build_tree(struct device_node *parent,
return ret;
}

-void __init prom_build_devicetree(void)
+void __init of_pdt_build_devicetree(phandle root_node)
{
struct device_node **nextp;

- allnodes = prom_create_node(prom_root_node, NULL);
+ allnodes = prom_create_node(root_node, NULL);
+#if defined(CONFIG_SPARC)
allnodes->path_component_name = "";
+#endif
allnodes->full_name = "/";

nextp = &allnodes->allnext;
allnodes->child = prom_build_tree(allnodes,
prom_getchild(allnodes->phandle),
&nextp);
- of_console_init();
-
- printk("PROM: Built device tree with %u bytes of memory.\n",
- prom_early_allocated);
}
diff --git a/include/linux/of_pdt.h b/include/linux/of_pdt.h
new file mode 100644
index 0000000..c0a8774
--- /dev/null
+++ b/include/linux/of_pdt.h
@@ -0,0 +1,24 @@
+/*
+ * Definitions for building a device tree by calling into the
+ * Open Firmware PROM.
+ *
+ * Copyright (C) 2010 Andres Salomon <dilinger@queued.net>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#ifndef _LINUX_OF_PDT_H
+#define _LINUX_OF_PDT_H
+
+extern void *prom_early_alloc(unsigned long size);
+
+/* for building the device tree */
+extern void of_pdt_build_devicetree(phandle root_node);
+
+extern void (*prom_build_more)(struct device_node *dp,
+ struct device_node ***nextp);
+
+#endif /* _LINUX_OF_PDT_H */
--
1.5.6.5