lkml.org 
[lkml]   [2017]   [Jun]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 2/2] ARM: cpuidle: Support asymmetric idle definition
On Mon, Jun 12, 2017 at 08:49:39PM +0200, Rafael J. Wysocki wrote:
> On Monday, June 12, 2017 05:55:10 PM Daniel Lezcano wrote:
> > Some hardware have clusters with different idle states. The current code does
> > not support this and fails as it expects all the idle states to be identical.
> >
> > Because of this, the Mediatek mtk8173 had to create the same idle state for a
> > big.Little system and now the Hisilicon 960 is facing the same situation.
> >
> > Solve this by simply assuming the multiple driver will be needed for all the
> > platforms using the ARM generic cpuidle driver which makes sense because of the
> > different topologies we can support with a single kernel for ARM32 or ARM64.
> >
> > Every CPU has its own driver, so every single CPU can specify in the DT the
> > idle states.
> >
> > This simple approach allows to support the future dynamIQ system, current SMP
> > and HMP.
> >
> > Tested on:
> > - 96boards: Hikey 620
> > - 96boards: Hikey 960
> > - 96boards: dragonboard410c
> > - Mediatek 8173
> >
> > Cc: Sudeep Holla <sudeep.holla@arm.com>
> > Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
> > Tested-by: Leo Yan <leo.yan@linaro.org>
> > Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
>
> There seems to have been quite some discussion regarding this one and I'm not
> sure about the resolution of it.
>
> I'd feel more comfortable with an ACK or Reviewed-by from Sudeep or Lorenzo here.

I understand.

Sudeep it is ok with the patch [1] without an explicit acked-by.

-- Daniel

[1] https://www.spinics.net/lists/kernel/msg2525980.html

\
 
 \ /
  Last update: 2017-06-12 21:18    [W:0.071 / U:0.188 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site