[U-Boot] [PATCH 5/7] armv7R: dts: k3: am654: Add MCU_UART0 related definitions

[Andreas Dannenberg]

Although we currently use the MAIN_UART0 for R5 SPL console output there
are cases where we require access to the MCU_UART0 as well for example in
case of UART-based Y-Modem boot. To support these scenarios add related
DTS definitions to be able to use that UART early on.

Signed-off-by: Andreas Dannenberg <dannenberg at ti.com>
---
 arch/arm/dts/k3-am654-r5-base-board.dts | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/arch/arm/dts/k3-am654-r5-base-board.dts b/arch/arm/dts/k3-am654-r5-base-board.dts
index 7ed307f0d8..e31ed4fe64 100644
--- a/arch/arm/dts/k3-am654-r5-base-board.dts
+++ b/arch/arm/dts/k3-am654-r5-base-board.dts
@@ -16,6 +16,7 @@
 
 	aliases {
 		serial0 = &wkup_uart0;
+		serial1 = &mcu_uart0;
 		serial2 = &main_uart0;
 	};
 
@@ -118,6 +119,14 @@
 	status = "okay";
 };
 
+&mcu_uart0 {
+	u-boot,dm-spl;
+	pinctrl-names = "default";
+	pinctrl-0 = <&mcu_uart0_pins_default>;
+	clock-frequency = <48000000>;
+	status = "okay";
+};
+
 &main_uart0 {
 	power-domains = <&k3_pds 146 TI_SCI_PD_SHARED>;
 };
@@ -141,6 +150,16 @@
 		u-boot,dm-spl;
 	};
 
+	mcu_uart0_pins_default: mcu_uart0_pins_default {
+		pinctrl-single,pins = <
+			AM65X_WKUP_IOPAD(0x0044, PIN_INPUT, 4)	/* (P4) MCU_OSPI1_D1.MCU_UART0_RXD */
+			AM65X_WKUP_IOPAD(0x0048, PIN_OUTPUT, 4)	/* (P5) MCU_OSPI1_D2.MCU_UART0_TXD */
+			AM65X_WKUP_IOPAD(0x004C, PIN_INPUT, 4)	/* (P1) MCU_OSPI1_D3.MCU_UART0_CTSn */
+			AM65X_WKUP_IOPAD(0x0054, PIN_OUTPUT, 4)	/* (N3) MCU_OSPI1_CSn1.MCU_UART0_RTSn */
+		>;
+		u-boot,dm-spl;
+	};
+
 	wkup_i2c0_pins_default: wkup-i2c0-pins-default {
 		pinctrl-single,pins = <
 			AM65X_WKUP_IOPAD(0x00e0, PIN_INPUT, 0) /* (AC7) WKUP_I2C0_SCL */
-- 
2.17.1