From: Niklas Cassel Date: Mon, 14 Oct 2019 12:09:20 +0000 (+0200) Subject: arm64: dts: qcom: qcs404-evb: Set vdd_apc regulator in high power mode X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=eac8ce86cb90ba96cb4bcbf2549d7a8b6938aa30;p=linux.git arm64: dts: qcom: qcs404-evb: Set vdd_apc regulator in high power mode vdd_apc is the regulator that supplies the main CPU cluster. At sudden CPU load changes, we have noticed invalid page faults on addresses with all bits shifted, as well as on addresses with individual bits flipped. By putting the vdd_apc regulator in high power mode, the voltage drops during sudden load changes will be less severe, and we have not been able to reproduce the invalid page faults with the regulator in this mode. Fixes: 8faea8edbb35 ("arm64: dts: qcom: qcs404-evb: add spmi regulators") Cc: stable@vger.kernel.org Suggested-by: Bjorn Andersson Signed-off-by: Niklas Cassel Reviewed-by: Vinod Koul Link: https://lore.kernel.org/r/20191014120920.12691-1-niklas.cassel@linaro.org Signed-off-by: Bjorn Andersson --- diff --git a/arch/arm64/boot/dts/qcom/qcs404-evb.dtsi b/arch/arm64/boot/dts/qcom/qcs404-evb.dtsi index 501a7330dbc88..522d3ef72df5e 100644 --- a/arch/arm64/boot/dts/qcom/qcs404-evb.dtsi +++ b/arch/arm64/boot/dts/qcom/qcs404-evb.dtsi @@ -73,6 +73,7 @@ regulator-always-on; regulator-boot-on; regulator-name = "vdd_apc"; + regulator-initial-mode = <1>; regulator-min-microvolt = <1048000>; regulator-max-microvolt = <1384000>; };