[PATCH v2 2/2] arm64: dts: mediatek: mt8395-radxa-nio-12l: Enable i2c3 on 40-pin header

[Ricardo Pardini via B4 Relay]

From: Ricardo Pardini <ricardo at pardini.net>

i2c3 (SDA3/SCL3 on GPIO14/GPIO15) is routed to the 40-pin GPIO header,
exposed on the blue-colored pins 27 (SCL3) and 28 (SDA3). Enable the
controller and add the corresponding pin configuration in the pinctrl
node so users can use external I2C devices.

Signed-off-by: Ricardo Pardini <ricardo at pardini.net>
---
 arch/arm64/boot/dts/mediatek/mt8395-radxa-nio-12l.dts | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8395-radxa-nio-12l.dts b/arch/arm64/boot/dts/mediatek/mt8395-radxa-nio-12l.dts
index 589a5f07d5dde..9b0966c271cb5 100644
--- a/arch/arm64/boot/dts/mediatek/mt8395-radxa-nio-12l.dts
+++ b/arch/arm64/boot/dts/mediatek/mt8395-radxa-nio-12l.dts
@@ -371,6 +371,14 @@ it5205_sbu_mux: endpoint {
 	};
 };
 
+/* Exposed on 40-pin header (blue-colored pins 27:SCL3 28:SDA3) */
+&i2c3 {
+	clock-frequency = <400000>;
+	pinctrl-0 = <&i2c3_pins>;
+	pinctrl-names = "default";
+	status = "okay";
+};
+
 &i2c4 {
 	clock-frequency = <400000>;
 	pinctrl-0 = <&i2c4_pins>;
@@ -788,6 +796,15 @@ pins-bus {
 		};
 	};
 
+	i2c3_pins: i2c3-pins {
+		pins-bus {
+			pinmux = <PINMUX_GPIO14__FUNC_SDA3>,
+				 <PINMUX_GPIO15__FUNC_SCL3>;
+			bias-pull-up = <1000>;
+			drive-strength-microamp = <1000>;
+		};
+	};
+
 	i2c4_pins: i2c4-pins {
 		pins-bus {
 			pinmux = <PINMUX_GPIO16__FUNC_SDA4>,

-- 
2.54.0