Driver Core: Add platform device arch data V3

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.

[rjw: This change is for power management mostly and that's why it
 goes through the suspend tree.]

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Acked-by: Kevin Hilman <khilman@deeprootsystems.com>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>

8 files changed, 24 insertions, 0 deletions

diff --git a/arch/arm/include/asm/device.h b/arch/arm/include/asm/device.h
index c61642b40603..9f390ce335cb 100644
--- a/arch/arm/include/asm/device.h
+++ b/arch/arm/include/asm/device.h
@@ -12,4 +12,7 @@ struct dev_archdata {
 #endif
 };
 
+struct pdev_archdata {
+};
+
 #endif
diff --git a/arch/ia64/include/asm/device.h b/arch/ia64/include/asm/device.h
index 41ab85d66f33..d66d446b127c 100644
--- a/arch/ia64/include/asm/device.h
+++ b/arch/ia64/include/asm/device.h
@@ -15,4 +15,7 @@ struct dev_archdata {
 #endif
 };
 
+struct pdev_archdata {
+};
+
 #endif /* _ASM_IA64_DEVICE_H */
diff --git a/arch/microblaze/include/asm/device.h b/arch/microblaze/include/asm/device.h
index c042830793ed..30286db27c1c 100644
--- a/arch/microblaze/include/asm/device.h
+++ b/arch/microblaze/include/asm/device.h
@@ -16,6 +16,9 @@ struct dev_archdata {
         struct device_node      *of_node;
 };
 
+struct pdev_archdata {
+};
+
 #endif /* _ASM_MICROBLAZE_DEVICE_H */
 
 
diff --git a/arch/powerpc/include/asm/device.h b/arch/powerpc/include/asm/device.h
index 7d2277cef09a..e3e06e0f7fc0 100644
--- a/arch/powerpc/include/asm/device.h
+++ b/arch/powerpc/include/asm/device.h
@@ -30,4 +30,7 @@ dev_archdata_get_node(const struct dev_archdata *ad)
         return ad->of_node;
 }
 
+struct pdev_archdata {
+};
+
 #endif /* _ASM_POWERPC_DEVICE_H */
diff --git a/arch/sparc/include/asm/device.h b/arch/sparc/include/asm/device.h
index 3702e087df2c..f3b85b6b0b76 100644
--- a/arch/sparc/include/asm/device.h
+++ b/arch/sparc/include/asm/device.h
@@ -32,4 +32,7 @@ dev_archdata_get_node(const struct dev_archdata *ad)
         return ad->prom_node;
 }
 
+struct pdev_archdata {
+};
+
 #endif /* _ASM_SPARC_DEVICE_H */
diff --git a/arch/x86/include/asm/device.h b/arch/x86/include/asm/device.h
index 4994a20acbcb..cee34e9ca45b 100644
--- a/arch/x86/include/asm/device.h
+++ b/arch/x86/include/asm/device.h
@@ -13,4 +13,7 @@ struct dma_map_ops *dma_ops;
 #endif
 };
 
+struct pdev_archdata {
+};
+
 #endif /* _ASM_X86_DEVICE_H */
diff --git a/include/asm-generic/device.h b/include/asm-generic/device.h
index c17c9600f220..d7c76bba640d 100644
--- a/include/asm-generic/device.h
+++ b/include/asm-generic/device.h
@@ -9,4 +9,7 @@
 struct dev_archdata {
 };
 
+struct pdev_archdata {
+};
+
 #endif /* _ASM_GENERIC_DEVICE_H */
diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h
index 8dc5123b6305..672a69849735 100644
--- a/include/linux/platform_device.h
+++ b/include/linux/platform_device.h
@@ -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)