Re: [RFC PATCH v2 09/17] ARM: dts: tegra20: harmony: Setup voltage regulators for DVFS

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



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?



[Index of Archives]     [ARM Kernel]     [Linux ARM]     [Linux ARM MSM]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux