linux-kernel - Re: [PATCHv1 1/3] arm64: dts: meson: odroid-c2: Add missing regulator linked to P5V0 regulator

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Date:   Sun, 1 Sep 2019 13:37:25 +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 1/3] arm64: dts: meson: odroid-c2: Add missing regulator
 linked to P5V0 regulator

On Wed, Aug 28, 2019 at 10:27 PM Anand Moon <linux.amoon@...il.com> wrote:
>
> As per shematics VDDIO_AO18, VDDIO_AO3V3/VDD3V3 DDR3_1V5/DDR_VDDC:
typo: "schematics"

> fixed regulator output which is supplied by P5V0.
>
> Rename vcc3v3 regulator node to vddio_ao3v3 as per shematics.
typo: "schematics"

according to the schematics there's both:
- VDDIO_AO3V3
- VCC3V3 (which is turned on by VDDIO_AO3V3, see [0])

> 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>
> ---
>  .../boot/dts/amlogic/meson-gxbb-odroidc2.dts  | 29 +++++++++++++++++--
>  1 file changed, 26 insertions(+), 3 deletions(-)
>
> diff --git a/arch/arm64/boot/dts/amlogic/meson-gxbb-odroidc2.dts b/arch/arm64/boot/dts/amlogic/meson-gxbb-odroidc2.dts
> index 792698a60a12..98e742bf44c1 100644
> --- a/arch/arm64/boot/dts/amlogic/meson-gxbb-odroidc2.dts
> +++ b/arch/arm64/boot/dts/amlogic/meson-gxbb-odroidc2.dts
> @@ -104,11 +104,34 @@
>                 regulator-max-microvolt = <1800000>;
>         };
>
> -       vcc3v3: regulator-vcc3v3 {
> +       vddio_ao1v8: regulator-vddio-ao1v8 {
>                 compatible = "regulator-fixed";
> -               regulator-name = "VCC3V3";
> +               regulator-name = "VDDIO_AO1V8";
> +               regulator-min-microvolt = <1800000>;
> +               regulator-max-microvolt = <1800000>;
> +               regulator-always-on;
> +               /* U17 RT9179GB */
> +               vin-supply = <&p5v0>;
> +       };
> +
> +       vddio_ao3v3: regulator-vddio-ao3v3 {
> +               compatible = "regulator-fixed";
> +               regulator-name = "VDDIO_AO3V3";
>                 regulator-min-microvolt = <3300000>;
>                 regulator-max-microvolt = <3300000>;
> +               regulator-always-on;
> +               /* U11 MP2161GJ-C499 */
> +               vin-supply = <&p5v0>;
> +       };
> +
> +       vddc_ddr: regulator-vddc-ddr {
> +               compatible = "regulator-fixed";
> +               regulator-name = "DDR_VDDC";
personally I would call this (along with the node name and alias) DDR3_1V5
odroid-c2_rev0.1_20150930.pdf shows that DDR3_1V5 and DDR_VDDC are
both the same. however, the DDR_VDDC signal name is not used by any
component in the datasheet

> +               regulator-min-microvolt = <1500000>;
> +               regulator-max-microvolt = <1500000>;
> +               regulator-always-on;
> +               /* U15 MP2161GJ-C499 */
> +               vin-supply = <&p5v0>;
>         };
>
>         emmc_pwrseq: emmc-pwrseq {
> @@ -301,7 +324,7 @@
>         mmc-hs200-1_8v;
>
>         mmc-pwrseq = <&emmc_pwrseq>;
> -       vmmc-supply = <&vcc3v3>;
> +       vmmc-supply = <&vddio_ao3v3>;
odroid-c2_rev0.1_20150930.pdf uses VCC3V3 as supply


Martin