From 091c96151279a95c8166c81ecf14e8e2c8b45d53 Mon Sep 17 00:00:00 2001 From: Niklas Cassel Date: Mon, 14 Oct 2019 14:09:20 +0200 Subject: [PATCH] arm64: dts: qcom: qcs404-evb: Set vdd_apc regulator in high power mode commit eac8ce86cb90ba96cb4bcbf2549d7a8b6938aa30 upstream. 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 Signed-off-by: Greg Kroah-Hartman --- arch/arm64/boot/dts/qcom/qcs404-evb.dtsi | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/boot/dts/qcom/qcs404-evb.dtsi b/arch/arm64/boot/dts/qcom/qcs404-evb.dtsi index 501a7330dbc8..522d3ef72df5 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>; };