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

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Date:	Wed, 10 Jun 2009 21:16:59 +0900
From:	Magnus Damm <magnus.damm@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	paul@...an.com, khilman@...prootsystems.com, gregkh@...e.de,
	rjw@...k.pl, stern@...land.harvard.edu,
	Magnus Damm <magnus.damm@...il.com>,
	linux-pm@...ts.linux-foundation.org
Subject: [PATCH] Driver Core: Add platform device arch data V3

From: Magnus Damm <damm@...l.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@...l.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)
--
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