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From:   Jernej Skrabec <jernej.skrabec@gmail.com>
To:     mripard@kernel.org, wens@csie.org
Cc:     robh+dt@kernel.org, jernej.skrabec@gmail.com,
        devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-sunxi@lists.linux.dev, linux-kernel@vger.kernel.org
Subject: [PATCH 1/2] arm64: dts: allwinner: h6: tanix-tx6: Add PIO power supplies
Date:   Wed, 21 Jul 2021 22:08:31 +0200
Message-Id: <20210721200832.916644-2-jernej.skrabec@gmail.com>
In-Reply-To: <20210721200832.916644-1-jernej.skrabec@gmail.com>
References: <20210721200832.916644-1-jernej.skrabec@gmail.com>
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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@gmail.com>
---
 .../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>;
+	};
+
 	reg_vcc3v3: 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