linux-kernel - Re: [PATCHv1 3/3] arm64: dts: meson: odroid-c2: Add missing regulator linked to HDMI supply

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Date:   Sun, 1 Sep 2019 13:44:44 +0200
From:   Martin Blumenstingl <martin.blumenstingl@...glemail.com>
To:     Anand Moon <linux.amoon@...il.com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Jerome Brunet <jbrunet@...libre.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Kevin Hilman <khilman@...libre.com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCHv1 3/3] arm64: dts: meson: odroid-c2: Add missing regulator
 linked to HDMI supply

Hi Anand,

On Wed, Aug 28, 2019 at 10:27 PM Anand Moon <linux.amoon@...il.com> wrote:
>
> As per shematics HDMI_P5V0 is supplied by P5V0 so add missing link.
typo: "schematics"

> 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-gxbb-odroidc2.dts | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/amlogic/meson-gxbb-odroidc2.dts b/arch/arm64/boot/dts/amlogic/meson-gxbb-odroidc2.dts
> index a078a1ee5004..47789fd50415 100644
> --- a/arch/arm64/boot/dts/amlogic/meson-gxbb-odroidc2.dts
> +++ b/arch/arm64/boot/dts/amlogic/meson-gxbb-odroidc2.dts
> @@ -213,6 +213,8 @@
>         status = "okay";
>         pinctrl-0 = <&hdmi_hpd_pins>, <&hdmi_i2c_pins>;
>         pinctrl-names = "default";
> +       /* AP2331SA-7 */
> +       hdmi-supply = <&p5v0>;
>  };
my understanding based on odroid-c2_rev0.1_20150930.pdf is that:
- there's a (fixed) hdmi_p5v0 regulator using p5v0 as input
- the hdmi_p5v0 is the hdmi-supply

it doesn't change the functionality of this patch (since both supplies
are fixed regulators anyways)
you are already doing a nice cleanup with this series, so it would be
a shame to take a shortcut here


Martin