On 10/28/2010 11:51 PM, ext Ohad Ben-Cohen wrote:
On Thu, Oct 28, 2010 at 6:40 PM, Kishore Kadiyala
<kishorek.kadiyala@xxxxxxxxx> wrote:
On Thu, Oct 28, 2010 at 9:43 PM, Nicolas Pitre<nico@xxxxxxxxxxx> wrote:
This is not clear that this is something that the core can effectively
help with. Opportunistic power saving at the host controller level is
pretty much hardware dependent and may wildly vary in capabilities...
and bugs. So in this later case I think the driver for the host
controller is the best place to just set up a timer and gate the clock
after a certain period of inactivity for example.
makes sense, thanks.
just to be sure, we're talking about controller clock and not card clock. right?
Agree,
So briefly, calling pm_runtime_put_sync using a activity based timer
in the host Controller
driver will gate the clock to the controller .
Just make sure you call pm_suspend_ignore_children(), because you want
to be able to gate that clock even when the card is still active
Let's be specific when we say clock. Which clock?
--
regards,
-roger
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