nerves_system_ti_am62x

From 3759718dbddccce6e8bab5f8b63e440e4f9c0473 Mon Sep 17 00:00:00 2001
From: Alex McLain <alex@alexmclain.com>
Date: Thu, 13 Jun 2024 21:51:03 -0700
Subject: [PATCH 1/2] Enable UART5 (ttyS0) on expansion header

---
 arch/arm64/boot/dts/ti/k3-am625-sk.dts | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-am625-sk.dts b/arch/arm64/boot/dts/ti/k3-am625-sk.dts
index f9b7fa2e8156..d792b3142002 100644
--- a/arch/arm64/boot/dts/ti/k3-am625-sk.dts
+++ b/arch/arm64/boot/dts/ti/k3-am625-sk.dts
@@ -13,6 +13,10 @@ / {
 	compatible = "ti,am625-sk", "ti,am625";
 	model = "Texas Instruments AM625 SK";
 
+	aliases {
+		serial0 = &main_uart5;
+	};
+
 	opp-table {
 		/* Add 1.4GHz OPP for am625-sk board. Requires VDD_CORE to be at 0.85V */
 		opp-1400000000 {
@@ -196,6 +200,13 @@ AM62X_IOPAD(0x11c, PIN_INPUT, 0) /* (#N/A) MMC2_CLKB */
 		>;
 	};
 
+	main_uart5_pins_default: main-uart5-pins-default {
+		pinctrl-single,pins = <
+			AM62X_IOPAD(0x01d8, PIN_INPUT, 1) /* (C15) MCAN0_TX.UART5_RXD */
+			AM62X_IOPAD(0x01dc, PIN_OUTPUT, 1) /* (E15) MCAN0_RX.UART5_TXD */
+		>;
+	};
+
 	main_wlirq_pins_default: main-wlirq-pins-default {
 		pinctrl-single,pins = <
 			AM62X_IOPAD(0x128, PIN_INPUT, 7) /* (B23) MMC2_SDWP.GPIO0_72 */
@@ -232,6 +243,12 @@ exp1: gpio@22 {
 	};
 };
 
+&main_uart5 {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&main_uart5_pins_default>;
+};
+
 &sdhci1 {
 	vmmc-supply = <&vdd_mmc1>;
 	vqmmc-supply = <&vdd_sd_dv>;
-- 
2.25.1