Re: [PATCH v5 09/12] dt-bindings: misc: add bindings for throttler

From: Matthias Kaehlcke
Date: Wed Aug 01 2018 - 13:39:51 EST

Hi Chanwoo,

On Wed, Aug 01, 2018 at 05:27:57PM +0900, Chanwoo Choi wrote:
> Hi Matthias,
> On 2018ë 07ì 04ì 08:47, Matthias Kaehlcke wrote:
> > The Throttler is used for non-thermal throttling of system components
> > like CPUs or devfreq devices.
> >
> > Signed-off-by: Matthias Kaehlcke <mka@xxxxxxxxxxxx>
> If possible, I hope the more detailed example for "cpu0_opp03, &cpu1_opp02, &gpu_opp03"
> because I'm confusing the meaning of 'cpu0_opp03' phandle.

I omitted the OPP definitions to avoid cluttering the example. I'm
happy to add them if DT folks also think it would add value.

> cpu0_opp03 indicates the only one specific OPP entry among set of
> OPP entries of CPU0 cpufreq? or cpu0_opp03 indicates the set of OPP
> entries for CPU0 cpufreq ?

cpu0_opp03 and the other phandles are specific OPP entries, that
indicate the throttler which frequencies/OPPs should be used for
throttling. For devices/CPUs with multiple levels of throttling
multiple entries from its OPP set are listed. In the example a single
level of throttling is used for all devices/CPUs.