lkml.org 
[lkml]   [2019]   [Jul]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    From
    Date
    SubjectRe: [PATCH 00/15] thermal: qcom: tsens: Add interrupt support
    On Mon, Jul 29, 2019 at 3:03 PM Luca Weiss <luca@z3ntu.xyz> wrote:
    >
    > 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

    Niklas is working on refactoring some of the Krait code[1]. I'm not
    sure if he looked at 8974 directly as part of the refactor adding him
    here to get a better sense of the state of cpufreq on 8974.

    [1] https://lore.kernel.org/linux-arm-msm/20190726080823.xwhxagv5iuhudmic@vireshk-i7/T/#t

    \
     
     \ /
      Last update: 2019-07-29 11:51    [W:4.023 / U:0.124 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site