[PATCH] Driver Core: Add platform device arch data V3

Magnus Damm
2009-06-10T12:16:59Z

From: Magnus Damm <damm@igel.co.jp>

Allow architecture specific data in struct platform_device V3.

With this patch struct pdev_archdata is added to struct
platform_device, similar to struct dev_archdata in found in
struct device. Useful for architecture code that needs to
keep extra data associated with each platform device.

Struct pdev_archdata is different from dev.platform_data, the
convention is that dev.platform_data points to driver-specific
data. It may or may not be required by the driver. The format
of this depends on driver but is the same across architectures.

The structure pdev_archdata is a place for architecture specific
data. This data is handled by architecture specific code (for
example runtime PM), and since it is architecture specific it
should _never_ be touched by device driver code. Exactly like
struct dev_archdata but for platform devices.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
---

Applies to next-20090610.

Changes since V2:
- updated commit message, thanks to Rafael for feedback

Changes since V1:
- post to lkml, keep linux-pm cc:ed
- add struct pdev_archdata to asm-generic
- add struct pdev_archdata to non-generic architectures
- drop Kconfig bits

arch/arm/include/asm/device.h | 3 +++
arch/ia64/include/asm/device.h | 3 +++
arch/microblaze/include/asm/device.h | 3 +++
arch/powerpc/include/asm/device.h | 3 +++
arch/sparc/include/asm/device.h | 3 +++
arch/x86/include/asm/device.h | 3 +++
include/asm-generic/device.h | 3 +++
include/linux/platform_device.h | 3 +++
8 files changed, 24 insertions(+)

--- 0001/arch/arm/include/asm/device.h
+++ work/arch/arm/include/asm/device.h 2009-06-01 12:19:51.000000000 +0900
@@ -12,4 +12,7 @@ struct dev_archdata {
#endif
};

+struct pdev_archdata {
+};
+
#endif
--- 0001/arch/ia64/include/asm/device.h
+++ work/arch/ia64/include/asm/device.h 2009-06-01 12:18:11.000000000 +0900
@@ -15,4 +15,7 @@ struct dev_archdata {
#endif
};

+struct pdev_archdata {
+};
+
#endif /* _ASM_IA64_DEVICE_H */
--- 0001/arch/microblaze/include/asm/device.h
+++ work/arch/microblaze/include/asm/device.h 2009-06-01 12:19:32.000000000 +0900
@@ -16,6 +16,9 @@ struct dev_archdata {
struct device_node *of_node;
};

+struct pdev_archdata {
+};
+
#endif /* _ASM_MICROBLAZE_DEVICE_H */

--- 0001/arch/powerpc/include/asm/device.h
+++ work/arch/powerpc/include/asm/device.h 2009-06-01 12:16:28.000000000 +0900
@@ -30,4 +30,7 @@ dev_archdata_get_node(const struct dev_a
return ad->of_node;
}

+struct pdev_archdata {
+};
+
#endif /* _ASM_POWERPC_DEVICE_H */
--- 0001/arch/sparc/include/asm/device.h
+++ work/arch/sparc/include/asm/device.h 2009-06-01 12:18:57.000000000 +0900
@@ -32,4 +32,7 @@ dev_archdata_get_node(const struct dev_a
return ad->prom_node;
}

+struct pdev_archdata {
+};
+
#endif /* _ASM_SPARC_DEVICE_H */
--- 0001/arch/x86/include/asm/device.h
+++ work/arch/x86/include/asm/device.h 2009-06-01 12:17:28.000000000 +0900
@@ -13,4 +13,7 @@ struct dma_map_ops *dma_ops;
#endif
};

+struct pdev_archdata {
+};
+
#endif /* _ASM_X86_DEVICE_H */
--- 0001/include/asm-generic/device.h
+++ work/include/asm-generic/device.h 2009-06-01 12:16:20.000000000 +0900
@@ -9,4 +9,7 @@
struct dev_archdata {
};

+struct pdev_archdata {
+};
+
#endif /* _ASM_GENERIC_DEVICE_H */
--- 0001/include/linux/platform_device.h
+++ work/include/linux/platform_device.h 2009-06-01 12:14:43.000000000 +0900
@@ -22,6 +22,9 @@ struct platform_device {
struct resource * resource;

struct platform_device_id *id_entry;
+
+ /* arch specific additions */
+ struct pdev_archdata archdata;
};

#define platform_get_device_id(pdev) ((pdev)->id_entry)