arm64: dts: apq8096-db820c: Fix VDD core voltage

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APQ8096 has its VDD APC (Power for quad Kryo applications
microprocessors) powered by PM8996 PMIC S9, S10, S11 tri-phase
regulators (gang). The bootloader may have configured these
regulators with non sustainable default values, leading to sporadic
hangs under CPU stress tests (cpufreq-bench). Ideally we should enable
voltage scaling along with frequency scaling, but for now just set the
regulator gang value to a sane voltage, capable of supporting highest
frequencies (turbo).

Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Link: https://lore.kernel.org/r/1578401755-26211-1-git-send-email-loic.poulain@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

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Loic Poulain 2020-01-07 13:55:55 +01:00 • committed by Bjorn Andersson

parent eac8ce86cb

commit 7a2a2231ef

3 changed files with 25 additions and 0 deletions

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16

arch/arm64/boot/dts/qcom/apq8096-db820c.dtsi

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arch/arm64/boot/dts/qcom/msm8996.dtsi

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arch/arm64/boot/dts/qcom/pm8994.dtsi

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