arm64: dts: ti: k3-am62-verdin: Split UART_2 pinctrl group

Some carrier board reuse the UART_2 control signals as GPIO, split
the pinctrl RTS/CTS in separated nodes to maximize flexibility.

Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Link: https://patch.msgid.link/20260324093705.26730-4-francesco@dolcini.it
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>

Author: dolcini

arch/arm64/boot/dts/ti/k3-am62-verdin.dtsi

@@ -820,15 +820,27 @@
 		>;
 	};
 
-	/* Verdin UART_2 */
+	/* Verdin UART_2 RX/TX */
 	pinctrl_wkup_uart0: wkup-uart0-default-pins {
 		pinctrl-single,pins = <
-			AM62X_MCU_IOPAD(0x002c, PIN_INPUT_PULLUP, 0) /* (C6) WKUP_UART0_CTSn */ /* SODIMM 143 */
-			AM62X_MCU_IOPAD(0x0030, PIN_OUTPUT,       0) /* (A4) WKUP_UART0_RTSn */ /* SODIMM 141 */
 			AM62X_MCU_IOPAD(0x0024, PIN_INPUT_PULLUP, 0) /* (B4) WKUP_UART0_RXD  */ /* SODIMM 137 */
 			AM62X_MCU_IOPAD(0x0028, PIN_OUTPUT,       0) /* (C5) WKUP_UART0_TXD  */ /* SODIMM 139 */
 		>;
 	};
+
+	/* Verdin UART_2 CTS */
+	pinctrl_wkup_uart0_cts: wkup-uart0-cts-default-pins {
+		pinctrl-single,pins = <
+			AM62X_MCU_IOPAD(0x002c, PIN_INPUT_PULLUP, 0) /* (C6) WKUP_UART0_CTSn */ /* SODIMM 143 */
+		>;
+	};
+
+	/* Verdin UART_2 RTS */
+	pinctrl_wkup_uart0_rts: wkup-uart0-rts-default-pins {
+		pinctrl-single,pins = <
+			AM62X_MCU_IOPAD(0x0030, PIN_OUTPUT,       0) /* (A4) WKUP_UART0_RTSn */ /* SODIMM 141 */
+		>;
+	};
 };
 
 /* VERDIN I2S_1_MCLK */
@@ -1502,7 +1514,7 @@
 /* Verdin UART_2 */
 &wkup_uart0 {
 	pinctrl-names = "default";
-	pinctrl-0 = <&pinctrl_wkup_uart0>;
+	pinctrl-0 = <&pinctrl_wkup_uart0>, <&pinctrl_wkup_uart0_cts>, <&pinctrl_wkup_uart0_rts>;
 	status = "disabled";
 };