* Keeping a clock enabled during suspend
@ 2016-02-03 17:04 Fabio Estevam
2016-02-18 1:38 ` Michael Turquette
0 siblings, 1 reply; 3+ messages in thread
From: Fabio Estevam @ 2016-02-03 17:04 UTC (permalink / raw)
To: Stephen Boyd; +Cc: linux-clk, Michael Turquette, peter.chen, Lee Jones
Hi,
I am trying to implement a workaround for a mx25 USB erratum issue
(ENGcm08333), where I need to keep the USB clock turned on when the
system enters in suspend.
Is it possible to indicate that a clock needs to be kept enabled in
suspend with the current clock framework?
I saw this attempt from Lee Jones:
https://lkml.org/lkml/2015/4/8/9
Any suggestions?
Thanks,
Fabio Estevam
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Keeping a clock enabled during suspend
2016-02-03 17:04 Keeping a clock enabled during suspend Fabio Estevam
@ 2016-02-18 1:38 ` Michael Turquette
2016-02-22 17:18 ` Fabio Estevam
0 siblings, 1 reply; 3+ messages in thread
From: Michael Turquette @ 2016-02-18 1:38 UTC (permalink / raw)
To: Fabio Estevam, Stephen Boyd; +Cc: linux-clk, peter.chen, Lee Jones
Quoting Fabio Estevam (2016-02-03 09:04:07)
> Hi,
> =
> I am trying to implement a workaround for a mx25 USB erratum issue
> (ENGcm08333), where I need to keep the USB clock turned on when the
> system enters in suspend.
> =
> Is it possible to indicate that a clock needs to be kept enabled in
> suspend with the current clock framework?
> =
> I saw this attempt from Lee Jones:
> https://lkml.org/lkml/2015/4/8/9
That link didn't resolve for me but I'm guessing those are the CRITICAL
clk patches.
That flag is designed to keep a clock on always, so it may do what you
want, but I'd like to know more first.
Where does your clock get cut? Is there a clk_disable call in a suspend
callback that does this to your USB clk?
Regards,
Mike
> =
> Any suggestions?
> =
> Thanks,
> =
> Fabio Estevam
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Keeping a clock enabled during suspend
2016-02-18 1:38 ` Michael Turquette
@ 2016-02-22 17:18 ` Fabio Estevam
0 siblings, 0 replies; 3+ messages in thread
From: Fabio Estevam @ 2016-02-22 17:18 UTC (permalink / raw)
To: Michael Turquette; +Cc: Stephen Boyd, linux-clk, peter.chen, Lee Jones
On Wed, Feb 17, 2016 at 11:38 PM, Michael Turquette
<mturquette@baylibre.com> wrote:
> That link didn't resolve for me but I'm guessing those are the CRITICAL
> clk patches.
>
> That flag is designed to keep a clock on always, so it may do what you
> want, but I'd like to know more first.
Yes, let me give it a try with CLK_IS_CRITICAL once it reaches
linux-next. I think that should solve this issue, thanks.
^ permalink raw reply [flat|nested] 3+ messages in thread
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2016-02-03 17:04 Keeping a clock enabled during suspend Fabio Estevam
2016-02-18 1:38 ` Michael Turquette
2016-02-22 17:18 ` Fabio Estevam
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