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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: 8faea8edbb ("arm64: dts: qcom: qcs404-evb: add spmi regulators")
Cc: stable@vger.kernel.org
Suggested-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Niklas Cassel <niklas.cassel@linaro.org>
Reviewed-by: Vinod Koul <vkoul@kernel.org>
Link: https://lore.kernel.org/r/20191014120920.12691-1-niklas.cassel@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
This commit is contained in:
Niklas Cassel 2019-10-14 14:09:20 +02:00 committed by Bjorn Andersson
parent c9ec155b59
commit eac8ce86cb
1 changed files with 1 additions and 0 deletions
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1
arch/arm64/boot/dts/qcom/qcs404-evb.dtsi
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@ -73,6 +73,7 @@
regulator-always-on; regulator-always-on;
regulator-boot-on; regulator-boot-on;
regulator-name = "vdd_apc"; regulator-name = "vdd_apc";
regulator-initial-mode = <1>;
regulator-min-microvolt = <1048000>; regulator-min-microvolt = <1048000>;
regulator-max-microvolt = <1384000>; regulator-max-microvolt = <1384000>;
}; };