linux-kernel - Re: [PATCH] arm64: dts: qcom: pmk8350: Make RTC disabled by default; enable on sc7280-idp

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Message-ID: <CAD=FV=WnMnEckHdu0DG3U8MnyjwQ42aybFxq35nWSLG=vs=LGA@mail.gmail.com>
Date:   Mon, 18 Oct 2021 14:45:09 -0700
From:   Doug Anderson <dianders@...omium.org>
To:     satya priya <skakit@...eaurora.org>
Cc:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        Vinod Koul <vkoul@...nel.org>,
        Matthias Kaehlcke <mka@...omium.org>,
        Stephen Boyd <swboyd@...omium.org>,
        Andy Gross <agross@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] arm64: dts: qcom: pmk8350: Make RTC disabled by default;
 enable on sc7280-idp

Bjorn,

On Wed, Sep 29, 2021 at 9:00 PM <skakit@...eaurora.org> wrote:
>
> On 2021-09-30 04:08, Douglas Anderson wrote:
> > The RTC on the pmk8350 is not useful on all boards. Some boards may
> > not provide backup power to the PMIC but might have another RTC on the
> > board that does have backup power. In this case it's better to not use
> > the RTC on the PMIC.
> >
> > At the moment, the only boards that includes this PMIC are sc7280-idp
> > and sc7280-idp2. On sc7280-idp I'm not aware of any other RTCs, but
> > sc7280-idp2 has a Chrome OS EC on it and this is intended to provide
> > the RTC for the AP.
> >
> > Let's do what we normally do for hardware that's not used by all
> > boards and set it to a default status of "disabled" and then enable it
> > on the boards that need it.
> >
> > NOTE: for sc7280-idp it's _possible_ we might also want to add
> > `allow-set-time;`. That could be the subject of a future patch if it
> > is indeed true.
> >
> > Signed-off-by: Douglas Anderson <dianders@...omium.org>
> > ---
> >
>
> Reviewed-by: Satya Priya <skakit@...eaurora.org>

If you're still accepting patches for 5.16, it'd be keen if you'd
consider taking this one. Thanks!

-Doug