[PATCH/RFC v2 04/12] PM / Domains: Add genpd attach/detach callbacks

Kevin Hilman khilman at kernel.org
Thu Sep 25 14:33:55 PDT 2014

Geert Uytterhoeven <geert+renesas at glider.be> writes:

> While a PM domain can enable PM runtime management of its devices' module
> clocks by setting
> 	genpd->dev_ops.stop = pm_clk_suspend;
> 	genpd->dev_ops.start = pm_clk_resume;
> this also requires registering the clocks with the pm_clk subsystem.
> In the legacy case, this is handled by the platform code, after
> attaching the device to its PM domain.
> When the devices are instantiated from DT, devices are attached to their
> PM domains by generic code, leaving no method for the platform-specific
> PM domain code to register their clocks.
> Add two callbacks, allowing a PM domain to perform platform-specific
> tasks when a device is attached to or detached from a PM domain.
> Signed-off-by: Geert Uytterhoeven <geert+renesas at glider.be>

Nice, I like this approach!

Acked-by: Kevin Hilman <khilman at linaro.org>


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