lkml.org 
[lkml]   [2011]   [Jan]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [RFC][PATCH] Power domains for platform bus type
On Sun, 30 Jan 2011, Rafael J. Wysocki wrote:

> Hi,
>
> This is something we discussed during the last Linux Plumbers Conference.
>
> The problem appears to be that the same device may be used in different
> systems in different configurations such that actions necessary for the
> device's power management can vary from one system to another. In those
> cases the drivers' power management callbacks are generally not sufficient,
> because they can't take the configuration of the whole system into account.
>
> I think this issue may be addressed by adding objects that will represent
> power domains and will provide power management callbacks to be executed
> in addition to the device driver's PM callbacks, which is done by the patch
> below.
>
> Please have a look at it and tell me what you think.

One thing about this implementation is slightly questionable. The new
power_domain callbacks were added to the __weak platform PM routines,
which means they will have to be included in every overriding routine
provided by a platform imiplementation.

Would it be better to separate these things? Have the power_domain
callbacks occur in a static outer function which then calls a public
__weak inner function that can be overridden?

Alan Stern




\
 
 \ /
  Last update: 2011-01-30 17:05    [W:0.148 / U:0.060 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site