[PATCH v2 2/2] ARM: smp_scu: enable SCU standby support

Shawn Guo shawn.guo at freescale.com
Wed Jul 30 18:10:11 PDT 2014


On Tue, Jul 29, 2014 at 08:44:11PM +0800, Shawn Guo wrote:
> On Fri, Jul 25, 2014 at 04:09:50PM +0800, Shawn Guo wrote:
> > With SCU standby enabled, SCU CLK will be turned off when all processors
> > are in WFI mode.  And the clock will be turned on when any processor
> > leaves WFI mode.
> > 
> > This behavior should be preferable in terms of power efficiency of
> > system idle.  So let's set the SCU standby bit to enable the support in
> > function scu_enable().
> > 
> > Cortex-A9 earlier than r2p0 has no standby bit in SCU, so we need to
> > skip setting the bit for those.
> > 
> > Signed-off-by: Shawn Guo <shawn.guo at freescale.com>
> 
> If there is no objection on the patch, I will put it into patch tracker
> soon.

Submitted these two patches as #8121 and #8122.

Shawn



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