linux-kernel - Re: [PATCH] arm64: dts: qcom: msm8996: Reduce vdd

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Message-ID: <CAMZdPi_psRiy1FG338N1=9F+o4b=0ANLdc3UiCTB=UoMS=CH=A@mail.gmail.com>
Date:   Mon, 30 Mar 2020 11:11:33 +0200
From:   Loic Poulain <loic.poulain@...aro.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     Andy Gross <agross@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        devicetree <devicetree@...r.kernel.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: dts: qcom: msm8996: Reduce vdd_apc voltage

On Wed, 18 Mar 2020 at 06:46, Bjorn Andersson
<bjorn.andersson@...aro.org> wrote:
>
> Some msm8996 based devices are unstable when run with VDD_APC of 1.23V,
> which is listed as the maximum voltage in "Turbo" mode. Given that the
> CPU cluster is not run in "Turbo" mode, reduce this to 0.98V - the
> maximum voltage for nominal operation.
>
> Fixes: 7a2a2231ef22 ("arm64: dts: apq8096-db820c: Fix VDD core voltage")
> Cc: Loic Poulain <loic.poulain@...aro.org>
> Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
> ---
>  arch/arm64/boot/dts/qcom/apq8096-db820c.dtsi | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)

Don't see any problem with that change, tested with and without
cpufreq (db820c).

Tested-by: Loic Poulain <loic.poulain@...aro.org>