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SubjectRe: [PATCH 00/15] thermal: qcom: tsens: Add interrupt support
Date
On Montag, 29. Juli 2019 11:07:35 CEST Brian Masney wrote:
> On Sat, Jul 27, 2019 at 12:58:54PM +0530, Amit Kucheria wrote:
> > On Fri, Jul 26, 2019 at 4:59 PM Brian Masney <masneyb@onstation.org> wrote:
> > > On Fri, Jul 26, 2019 at 04:40:16PM +0530, Amit Kucheria wrote:
> > > > How well does cpufreq work on 8974? I haven't looked at it yet but
> > > > we'll need it for thermal throttling.
> > >
> > > I'm not sure how to tell if the frequency is dynamically changed during
> > > runtime on arm. x86-64 shows this information in /proc/cpuinfo. Here's
> >
> > > the /proc/cpuinfo on the Nexus 5:
> > Nah. /proc/cpuinfo won't show what we need.
> >
> > Try the following:
> >
> > $ grep "" /sys/devices/system/cpu/cpufreq/policy?/*
> >
> > More specifically, the following files have the information you need.
> > Run watch -n1 on them.
> >
> > $ grep "" /sys/devices/system/cpu/cpufreq/policy?/scaling_*_freq
>
> There's no cpufreq directory on msm8974:
>
> # ls -1 /sys/devices/system/cpu/
> cpu0
> cpu1
> cpu2
> cpu3
> cpuidle
> hotplug
> isolated
> kernel_max
> modalias
> offline
> online
> possible
> power
> present
> smt
> uevent
>
> I'm using qcom_defconfig.
>
> Brian

Hi Brian,
cpufreq isn't supported on msm8974 yet.
I have these patches [0] in my tree but I'm not sure they work correctly, but I haven't tested much with them. Feel free to try them on hammerhead.

Luca

[0] https://github.com/z3ntu/linux/compare/b0917f53ada0e929896a094b451219cd8091366e...6459ca6aff498c9d12acd35709b4903effc4c3f8
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