arm64: dts: qcom: qcs404-evb: Set vdd_apc regulator in high power mode

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commit eac8ce86cb 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: 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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Niklas Cassel 2019-10-14 14:09:20 +02:00 • committed by Greg Kroah-Hartman

parent 945afc5b16

commit 53d35a009b

1 changed files with 1 additions and 0 deletions

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arch/arm64/boot/dts/qcom/qcs404-evb.dtsi

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