[RFC] ARM: Enable dynamic clock gating?
will.deacon at arm.com
Thu Jul 31 08:15:11 PDT 2014
On Thu, Jul 31, 2014 at 03:24:17PM +0100, Sören Brinkmann wrote:
> Hi all,
> similar to the patch enabling the SCU standby mode
> (https://lkml.org/lkml/2014/7/30/122), I have a patch to enable the A9's
> 'dynamic clock gating'
> in platform code. This might also be a candidate to enable in common
> Do you think that would make sense?
> I tried to find the right place to add this and was looking at
> mm/proc-v7.S. It probably works to put it there, but does not really
> seem to be the right place.
> As reference, this is what I currently have as part of platform code:
> /* A9 clock gating */
> asm volatile ("mrc p15, 0, r12, c15, c0, 0\n"
> "orr r12, r12, #1\n"
> "mcr p15, 0, r12, c15, c0, 0\n"
> : /* no outputs */
> : /* no inputs */
> : "r12");
This should *really* be done by firmware.
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