[PATCH v2 2/3] arm64: dts: allwinner: h6: tanix-tx6: Add PIO power supplies

From: Jernej Skrabec
Date: Thu Jul 22 2021 - 12:12:35 EST


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 02641191682e..cf9721ca6370 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: regulator-vcc1v8 {
+ compatible = "regulator-fixed";
+ regulator-name = "vcc1v8";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ };
+
reg_vcc3v3: regulator-vcc3v3 {
compatible = "regulator-fixed";
regulator-name = "vcc3v3";
@@ -99,6 +106,12 @@ &ohci3 {
status = "okay";
};

+&pio {
+ vcc-pc-supply = <&reg_vcc1v8>;
+ vcc-pd-supply = <&reg_vcc3v3>;
+ vcc-pg-supply = <&reg_vcc1v8>;
+};
+
&r_ir {
linux,rc-map-name = "rc-tanix-tx5max";
status = "okay";
--
2.32.0