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

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Date:	Sun, 5 Jul 2009 01:44:39 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Magnus Damm <magnus.damm@...il.com>
Cc:	linux-kernel@...r.kernel.org, paul@...an.com,
	khilman@...prootsystems.com, gregkh@...e.de,
	stern@...land.harvard.edu, linux-pm@...ts.linux-foundation.org
Subject: Re: [PATCH] Driver Core: Add platform device arch data V3

On Wednesday 10 June 2009, Magnus Damm wrote:
> 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

The patch is now in the linux-next branch of the suspend-2.6 tree.  I'll move
it into the for-linus branch, which is not rebased, if it's not reported to
cause any problems in the next few days.

Best,
Rafael
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