Re: [PATCH 2/2] PM / devfreq: tie suspend/resume to runtime-pm

From: Alan Stern
Date: Thu Mar 21 2013 - 11:03:06 EST

On Thu, 21 Mar 2013, Rajagopal Venkat wrote:

> Allow device devfreq to be suspend/resume automatically with
> runtime pm suspend/resume. The devfreq drivers should be least
> cared when to suspend/resume the devfreq.
> pm_runtime_suspend(dev) will first suspend device devfreq(if available)
> before device is suspended from runtime pm core.
> pm_runtime_resume(dev) will resume device devfreq(if available) after
> device is resumed from runtime pm core.

Aren't these backward? The device continues to need its clocks and
frequency settings until _after_ it has been suspended. Similarly, it
needs them to be available _before_ it resumes.

Alan Stern

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