lkml.org 
[lkml]   [2017]   [Sep]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 0/3] Simple DVFS support for Allwinner A64 SoC
On Mon, Sep 25, 2017 at 10:12:09AM +0000, Icenowy Zheng wrote:
> 于 2017年9月25日 GMT+08:00 下午6:10:27, Maxime Ripard <maxime.ripard@free-electrons.com> 写到:
> >Hi,
> >
> >On Sat, Sep 23, 2017 at 12:15:28AM +0000, Icenowy Zheng wrote:
> >> This patchset imports simple DVFS support for Allwinner A64 SoC.
> >>
> >> As the thermal sensor driver is not yet implemented and some boards
> >> have still no AXP PMIC support, now only two OPPs are present --
> >> 648MHz@1.04V and 816MHz@1.1V to prevent overheat or undervoltage.
> >>
> >> PATCH 1 is a fix to the CCU driver of A64, and the remaining patches
> >> set up the device tree bits of the DVFS on Pine64.
> >
> >How has this been tested?
> >
> >What tasks did you run, with what governor, etc...
>
> I only tested manual frequency switching between 648MHz and
> 816MHz, and tested the PLL stuck issue by change the OPPs to
> some random value.

Ideally, we should test that it's actually reliable. Poorly chosen
OPPs might lead to corrupt data that you might not get before a while.

Please test using:
https://linux-sunxi.org/Hardware_Reliability_Tests#Reliability_of_cpufreq_voltage.2Ffrequency_settings

And post the report.

Maxime

--
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
[unhandled content-type:application/pgp-signature]
\
 
 \ /
  Last update: 2017-09-25 12:28    [W:0.223 / U:0.624 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site