linux-kernel - Re: [PATCH] ARM: smp_scu: Enable standby mode

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Date:	Wed, 30 Jul 2014 08:29:13 -0700
From:	Sören Brinkmann <soren.brinkmann@...inx.com>
To:	Will Deacon <will.deacon@....com>
CC:	Russell King <linux@....linux.org.uk>,
	Michal Simek <michal.simek@...inx.com>,
	Ben Dooks <ben.dooks@...ethink.co.uk>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH] ARM: smp_scu: Enable standby mode

On Wed, 2014-07-30 at 10:43AM +0100, Will Deacon wrote:
> On Tue, Jul 29, 2014 at 06:21:03PM +0100, Soren Brinkmann wrote:
> > Enable the SCU standby mode.
> > From documentation:
> >   When set, SCU CLK is turned off when all processors are in WFI mode,
> >   there is no pending request on the ACP (if implemented), and there is
> >   no remaining activity in the SCU.
> > 
> >   When SCU CLK is off, ARREADYS, AWREADYS and WREADYS on the ACP are forced
> >   LOW. The clock is turned on when any processor leaves WFI mode, or if
> >   there is a new request on the ACP.
> > 
> > Signed-off-by: Soren Brinkmann <soren.brinkmann@...inx.com>
> > ---
> > Hi,
> > 
> > I am working on some PM related patches for Zynq. One of them is
> > enabling the SCU standby mode. I was wondering whether this is probably
> > something that I should not do in platform specific code, but rather in
> > the common code for everybody?
> 
> Take a look at Shawn's patches for this:
> 
>   http://lists.infradead.org/pipermail/linux-arm-kernel/2014-July/275326.html

Great, so that is already coming. Is that patch already applied
somewhere?

	Thanks,
	Sören

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