Hi,
On Wed, Jul 21, 2021 at 10:08:31PM +0200, Jernej Skrabec wrote:
> While there is no publicly available schematic of this board, it's not
> hard to determine voltage of GPIO port C, D and G (only ones which can
> be set).
>
> Port C and G are used for MMC/SDIO communication, so they use 1.8 V
> power supply. It's not clear if port D is even used, but if it is, it's
> pretty safe to assume it uses 3.3 V power supply. Value read from PIO
> Group Withstand Voltage Mode Select register from within pre-installed
> Android agrees with that assesment.
>
> Signed-off-by: Jernej Skrabec <jernej.skrabec@xxxxxxxxx>
> ---
> .../boot/dts/allwinner/sun50i-h6-tanix-tx6.dts | 13 +++++++++++++
> 1 file changed, 13 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h6-tanix-tx6.dts b/arch/arm64/boot/dts/allwinner/sun50i-h6-tanix-tx6.dts
> index be81330db14f..a1dd8f472cc8 100644
> --- a/arch/arm64/boot/dts/allwinner/sun50i-h6-tanix-tx6.dts
> +++ b/arch/arm64/boot/dts/allwinner/sun50i-h6-tanix-tx6.dts
> @@ -32,6 +32,13 @@ hdmi_con_in: endpoint {
> };
> };
>
> + reg_vcc1v8: vcc1v8 {
> + compatible = "regulator-fixed";
> + regulator-name = "vcc1v8";
> + regulator-min-microvolt = <1800000>;
> + regulator-max-microvolt = <1800000>;
> + };
> +
I appreciate that the other 3.3V regulator has the same issue, but the
node name must reflect the class of the device. Maybe regulator-vcc1v8?
Maxime
