linux-kernel - Re: [RFCv1 1/5] arm64: dts: meson: Add missing 5V

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Date:   Mon, 7 Oct 2019 20:58:47 +0530
From:   Anand Moon <linux.amoon@...il.com>
To:     Neil Armstrong <narmstrong@...libre.com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Kevin Hilman <khilman@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        devicetree <devicetree@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-amlogic@...ts.infradead.org,
        Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [RFCv1 1/5] arm64: dts: meson: Add missing 5V_EN gpio signal for
 VCC5V regulator

Hi Neil,

On Mon, 7 Oct 2019 at 19:49, Neil Armstrong <narmstrong@...libre.com> wrote:
>
> Hi Anand,
>
> On 07/10/2019 15:16, Anand Moon wrote:
> > As per schematics add missing 5V_EN gpio signal to enable
> > VCC5V regulator node.
> >
> > Fixes: c35f6dc5c377 (arm64: dts: meson: Add minimal support for Odroid-N2)
> > Cc: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
> > Cc: Jerome Brunet <jbrunet@...libre.com>
> > Cc: Neil Armstrong <narmstrong@...libre.com>
> > Signed-off-by: Anand Moon <linux.amoon@...il.com>
> > ---
> >  arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts | 3 +++
> >  1 file changed, 3 insertions(+)
> >
> > diff --git a/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts b/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts
> > index 42f15405750c..a9a661258886 100644
> > --- a/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts
> > +++ b/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts
> > @@ -94,6 +94,9 @@
> >               regulator-max-microvolt = <5000000>;
> >               regulator-always-on;
> >               vin-supply = <&main_12v>;
> > +             /* U12 NB679GD 5V_EN */
> > +             gpio = <&gpio GPIOH_8 GPIO_OPEN_DRAIN>;
> > +             enable-active-high;
>
> This GPIO is handled by the BL301 SCP firmware, I'm personally against
> adding this to the DT since it's out of control of Linux or any OS.
>
> Neil
>

Thanks for your input.

> >       };
> >
> >       vcc_1v8: regulator-vcc_1v8 {
> >
>

Best Regards
-Anand