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?
