Properly configure and enable the three i2c controllers that have
devices attached and/or have pins exposed on the board connectors.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---
 .../dts/mediatek/mt8395-radxa-nio-12l.dts     | 54 +++++++++++++++++++
 1 file changed, 54 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 2c4d6805b668..79358e1a3e60 100644
--- a/arch/arm64/boot/dts/mediatek/mt8395-radxa-nio-12l.dts
+++ b/arch/arm64/boot/dts/mediatek/mt8395-radxa-nio-12l.dts
@@ -85,7 +85,61 @@ apu_mem: memory@62000000 {
 	};
 };
 
+&i2c2 {
+	clock-frequency = <400000>;
+	pinctrl-0 = <&i2c2_pins>;
+	pinctrl-names = "default";
+	status = "okay";
+
+	/* iTE IT5205FN Type-C 3:2 Alt. mode passive MUX at 0x48 */
+};
+
+&i2c4 {
+	clock-frequency = <400000>;
+	pinctrl-0 = <&i2c4_pins>;
+	pinctrl-names = "default";
+	status = "okay";
+
+	/* I2C4 exposed at 39-pins MIPI-LCD connector */
+};
+
+&i2c6 {
+	clock-frequency = <400000>;
+	pinctrl-0 = <&i2c6_pins>;
+	pinctrl-names = "default";
+	status = "okay";
+
+	/* MT6360 PMIC at 0x34 */
+};
+
 &pio {
+	i2c2_pins: i2c2-pins {
+		pins-bus {
+			pinmux = <PINMUX_GPIO12__FUNC_SDA2>,
+				 <PINMUX_GPIO13__FUNC_SCL2>;
+			bias-pull-up = <MTK_PULL_SET_RSEL_111>;
+			drive-strength = <6>;
+			drive-strength-microamp = <1000>;
+		};
+	};
+
+	i2c4_pins: i2c4-pins {
+		pins-bus {
+			pinmux = <PINMUX_GPIO16__FUNC_SDA4>,
+				 <PINMUX_GPIO17__FUNC_SCL4>;
+			bias-pull-up = <MTK_PULL_SET_RSEL_111>;
+			drive-strength-microamp = <1000>;
+		};
+	};
+
+	i2c6_pins: i2c6-pins {
+		pins {
+			pinmux = <PINMUX_GPIO25__FUNC_SDA6>,
+				 <PINMUX_GPIO26__FUNC_SCL6>;
+			bias-pull-up = <MTK_PULL_SET_RSEL_111>;
+		};
+	};
+
 	uart0_pins: uart0-pins {
 		pins-bus {
 			pinmux = <PINMUX_GPIO98__FUNC_UTXD0>,
-- 
2.43.0