[PATCH/RFC] Runtime PM: ARM: subarch-specific extensions of pdev_archdata

[Eric Miao]

On Thu, Sep 24, 2009 at 7:28 AM, Kevin Hilman
<khilman at deeprootsystems.com> wrote:
> Mikael Pettersson wrote:
>>
>> Eric Miao writes:
>>  > On Wed, Sep 23, 2009 at 9:50 AM, Kevin Hilman
>>  > <khilman at deeprootsystems.com> wrote:
>>  > > On ARM platforms, power management can be very platform specific.
>>  > > This patch allows ARM subarches to extend the platform_device
>>  > > pdev_archdata for each subarch by creating a new struct pdev_machdata
>>  > > and allowing each subarch to customize it as needed.
>>  > >
>>  > > As a starting point, each subarch's <mach/device.h> creates an empty
>>  > > struct pdev_machdata.
>>  > >
>>  >  > Shouldn't that pdev_archdata and pdev_machdata be pointer or
>> something
>>  > so that multiple platform_device can share something in common?
>>
>> Forcing it to be a pointer has allocation and lifetime implications.
>> Making it a struct allows the subarch to duplicate or share
>> (via a private pointer) data as it sees fit.
>
> Yes, the allocation/lifetime issues were why a struct was chosen.
>

Mmm... this makes sense to me. I'm ok with this patch - just wondering
for the moment what to put for the pxa architecture - I'll see what davinci
will do first, of course :)