lkml.org 
[lkml]   [2018]   [Oct]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [RFC PATCH v2 09/17] ARM: dts: tegra20: harmony: Setup voltage regulators for DVFS
From
Date
On 10/21/18 2:54 PM, Dmitry Osipenko wrote:
> Set min/max regulators voltage and add CPU node that hooks up CPU with
> voltage regulators.

> diff --git a/arch/arm/boot/dts/tegra20-harmony.dts b/arch/arm/boot/dts/tegra20-harmony.dts

> - sm0 {
> + core_vdd_reg: sm0 {
> regulator-name = "vdd_sm0,vdd_core";
> - regulator-min-microvolt = <1200000>;
> - regulator-max-microvolt = <1200000>;
> + regulator-min-microvolt = <1000000>;
> + regulator-max-microvolt = <1300000>;
> + regulator-coupled-with = <&rtc_vdd_reg>;
> + regulator-coupled-max-spread = <150000>;
> regulator-always-on;
> };

How do you know for sure that these increased ranges are safe (high end)
and stable (low end) for this particular board? IIRC the safe/legal
range depends on the chip SKU, and to be honest I have no idea which SKU
is present on Harmony... For public boards like Colibri I imagine
there's enough information out there to tell what will work, but maybe
not our internal boards like Harmony, unless you checked our ancient
downstream kernels?

\
 
 \ /
  Last update: 2018-10-22 17:45    [W:0.158 / U:2.620 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site