arm64: dts: ti: k3-am68-sk-base-board: Add pinmux for RPi Header

Add pinmux required to bring out the i2c and gpios on 40-pin RPi
expansion header on the AM68 SK board.
Signed-off-by: Sinthu Raja <sinthu.raja@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Udit Kumar <u-kumar1@ti.com>
Link: https://lore.kernel.org/r/20230602153554.1571128-3-nm@ti.comSigned-off-by: Vignesh Raghavendra <vigneshr@ti.com>

arch/arm64/boot/dts/ti/k3-am68-sk-base-board.dts

@@ -173,6 +173,32 @@ J721S2_IOPAD(0x0a0, PIN_INPUT, 0) /* (AB25) MCASP0_AXR12.MCAN7_RX */
 			J721S2_IOPAD(0x09c, PIN_INPUT, 0) /* (T24) MCASP0_AXR11.MCAN7_TX */
 		>;
 	};
+
+	main_i2c4_pins_default: main-i2c4-pins-default {
+		pinctrl-single,pins = <
+			J721S2_IOPAD(0x010, PIN_INPUT_PULLUP, 8) /* (AF28) MCAN13_RX.I2C4_SDA */
+			J721S2_IOPAD(0x014, PIN_INPUT_PULLUP, 8) /* (AD25) MCAN14_TX.I2C4_SCL */
+		>;
+	};
+
+	rpi_header_gpio0_pins_default: rpi-header-gpio0-pins-default {
+		pinctrl-single,pins = <
+			J721S2_IOPAD(0x0a8, PIN_INPUT, 7) /* (U24)  MCASP0_AXR14.GPIO0_42 */
+			J721S2_IOPAD(0x090, PIN_INPUT, 7) /* (W24) MCASP0_AXR8.GPIO0_36 */
+			J721S2_IOPAD(0x0bc, PIN_INPUT, 7) /* (V28) MCASP1_AFSX.GPIO0_47 */
+			J721S2_IOPAD(0x06c, PIN_INPUT, 7) /* (V26) MCAN1_TX.GPIO0_27 */
+			J721S2_IOPAD(0x004, PIN_INPUT, 7) /* (W25) MCAN12_TX.GPIO0_1 */
+			J721S2_IOPAD(0x008, PIN_INPUT, 7) /* (AC24) MCAN12_RX.GPIO0_2 */
+			J721S2_IOPAD(0x0b8, PIN_INPUT, 7) /* (AA24) MCASP1_ACLKX.GPIO0_46 */
+			J721S2_IOPAD(0x00c, PIN_INPUT, 7) /* (AE28) MCAN13_TX.GPIO0_3 */
+			J721S2_IOPAD(0x034, PIN_INPUT, 7) /* (AD24) PMIC_WAKE0.GPIO0_13 */
+			J721S2_IOPAD(0x0a4, PIN_INPUT, 7) /* (T23) MCASP0_AXR13.GPIO0_41 */
+			J721S2_IOPAD(0x0c0, PIN_INPUT, 7) /* (T28) MCASP1_AXR0.GPIO0_48 */
+			J721S2_IOPAD(0x0b4, PIN_INPUT, 7) /* (U25) MCASP1_AXR4.GPIO0_45 */
+			J721S2_IOPAD(0x0cc, PIN_INPUT, 7) /* (AE27) SPI0_CS0.GPIO0_51 */
+			J721S2_IOPAD(0x08c, PIN_INPUT, 7) /* (T25) MCASP0_AXR7.GPIO0_35 */
+		>;
+	};
 };
 
 &wkup_pmx2 {
@@ -214,12 +240,46 @@ J721S2_WKUP_IOPAD(0x068, PIN_OUTPUT, 0) /* (C23) WKUP_GPIO0_4.MCU_MCAN1_TX*/
 		>;
 	};
 
+	mcu_i2c0_pins_default: mcu-i2c0-pins-default {
+		pinctrl-single,pins = <
+			J721S2_WKUP_IOPAD(0x0a0, PIN_INPUT, 0) /* (G24) MCU_I2C0_SCL */
+			J721S2_WKUP_IOPAD(0x0a4, PIN_INPUT, 0) /* (J25) MCU_I2C0_SDA */
+		>;
+	};
+
 	mcu_i2c1_pins_default: mcu-i2c1-pins-default {
 		pinctrl-single,pins = <
 			J721S2_WKUP_IOPAD(0x078, PIN_INPUT, 0) /* (F24) WKUP_GPIO0_8.MCU_I2C1_SCL */
 			J721S2_WKUP_IOPAD(0x07c, PIN_INPUT, 0) /* (H26) WKUP_GPIO0_9.MCU_I2C1_SDA */
 		>;
 	};
+
+	mcu_rpi_header_gpio0_pins0_default: mcu-rpi-header-gpio0-pins0-default {
+		pinctrl-single,pins = <
+			J721S2_WKUP_IOPAD(0x118, PIN_INPUT, 7) /* (G25) WKUP_GPIO0_66 */
+			J721S2_WKUP_IOPAD(0x05C, PIN_INPUT, 7) /* (E24) MCU_SPI1_D0.WKUP_GPIO0_1 */
+			J721S2_WKUP_IOPAD(0x060, PIN_INPUT, 7) /* (C28) MCU_SPI1_D1.WKUP_GPIO0_2 */
+			J721S2_WKUP_IOPAD(0x058, PIN_INPUT, 7) /* (D26) MCU_SPI1_CLK.WKUP_GPIO0_0 */
+			J721S2_WKUP_IOPAD(0x094, PIN_INPUT, 7) /* (D25) MCU_SPI1_CS2.WKUP_GPIO0_15*/
+			J721S2_WKUP_IOPAD(0x0B8, PIN_INPUT, 7) /* (G27) WKUP_GPIO0_56 */
+			J721S2_WKUP_IOPAD(0x114, PIN_INPUT, 7) /* (J26) WKUP_GPIO0_57 */
+			J721S2_WKUP_IOPAD(0x11C, PIN_INPUT, 7) /* (J27) WKUP_GPIO0_67 */
+			J721S2_WKUP_IOPAD(0x064, PIN_INPUT, 7) /* (C27) MCU_SPI1_CS0.WKUP_GPIO0_3 */
+		>;
+	};
+};
+
+&wkup_pmx3 {
+	mcu_rpi_header_gpio0_pins1_default: mcu-rpi-header-gpio0-pins1-default {
+		pinctrl-single,pins = <
+			J721S2_WKUP_IOPAD(0x000, PIN_INPUT, 7) /* (K26) WKUP_GPIO0_49 */
+		>;
+	};
+};
+
+&main_gpio0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&rpi_header_gpio0_pins_default>;
 };
 
 &main_gpio2 {
@@ -235,7 +295,8 @@ &main_gpio6 {
 };
 
 &wkup_gpio0 {
-	status = "disabled";
+	pinctrl-names = "default";
+	pinctrl-0 = <&mcu_rpi_header_gpio0_pins0_default>, <&mcu_rpi_header_gpio0_pins1_default>;
 };
 
 &wkup_gpio1 {
@@ -271,6 +332,20 @@ exp1: gpio@21 {
 	};
 };
 
+&main_i2c4 {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&main_i2c4_pins_default>;
+	clock-frequency = <400000>;
+};
+
+&mcu_i2c0 {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&mcu_i2c0_pins_default>;
+	clock-frequency = <400000>;
+};
+
 &main_sdhci0 {
 	/* Unused */
 	status = "disabled";