Driver Core: Add platform device arch data V3

Magnus Damm · rjwysocki · commit d7aacaddcac3 · 2009-07-22T00:28:38.000+02:00
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 &lt;damm@igel.co.jp&gt;
Acked-by: Kevin Hilman &lt;khilman@deeprootsystems.com&gt;
Acked-by: Greg Kroah-Hartman &lt;gregkh@suse.de&gt;
Signed-off-by: Rafael J. Wysocki &lt;rjw@sisk.pl&gt;
diff --git 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
@@ -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
@@ -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
@@ -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
@@ -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
@@ -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
@@ -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
@@ -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)

-Original file line number
+Diff line change
 #endif
 };
 +struct pdev_archdata {
 +};
++
 #endif
Original file line number	Diff line number	Diff line change
`@@ -30,4 +30,7 @@ dev_archdata_get_node(const struct dev_archdata *ad)`
`30`	`30`	`return ad->of_node;`
`31`	`31`	`}`
`32`	`32`
	`33`	`+struct pdev_archdata {`
	`34`	`+};`
	`35`	`+`
`33`	`36`	`#endif /* _ASM_POWERPC_DEVICE_H */`
Original file line number	Diff line number	Diff line change
`@@ -32,4 +32,7 @@ dev_archdata_get_node(const struct dev_archdata *ad)`
`32`	`32`	`return ad->prom_node;`
`33`	`33`	`}`
`34`	`34`
	`35`	`+struct pdev_archdata {`
	`36`	`+};`
	`37`	`+`
`35`	`38`	`#endif /* _ASM_SPARC_DEVICE_H */`