Add main_uart1 description in evm devicetree.

This is a pending upstream kernel updates as of v6.3-rc6.

Signed-off-by: Nishanth Menon <n...@ti.com>
---
Sent to kernel.org 
https://lore.kernel.org/linux-devicetree/20230414073328.381336-1...@ti.com/

 arch/arm/dts/k3-am642-evm.dts | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/arch/arm/dts/k3-am642-evm.dts b/arch/arm/dts/k3-am642-evm.dts
index 82d356a66793..9cc271d9a22a 100644
--- a/arch/arm/dts/k3-am642-evm.dts
+++ b/arch/arm/dts/k3-am642-evm.dts
@@ -230,6 +230,16 @@
                >;
        };
 
+       /* XXX: Upstream kernel TODO: send upstream pinmux */
+       main_uart1_pins_default: main-uart1-pins-default {
+               pinctrl-single,pins = <
+                       AM64X_IOPAD(0x0248, PIN_INPUT, 0)               /* 
(D16) UART1_CTSn */
+                       AM64X_IOPAD(0x024c, PIN_OUTPUT, 0)              /* 
(E16) UART1_RTSn */
+                       AM64X_IOPAD(0x0240, PIN_INPUT, 0)               /* 
(E15) UART1_RXD */
+                       AM64X_IOPAD(0x0244, PIN_OUTPUT, 0)              /* 
(E14) UART1_TXD */
+               >;
+       };
+
        main_uart0_pins_default: main-uart0-pins-default {
                pinctrl-single,pins = <
                        AM64X_IOPAD(0x0238, PIN_INPUT, 0) /* (B16) UART0_CTSn */
@@ -355,6 +365,9 @@
 /* main_uart1 is reserved for firmware usage */
 &main_uart1 {
        status = "reserved";
+       /* XXX: Upstream kernel TODO: send upstream pinmux */
+       pinctrl-names = "default";
+       pinctrl-0 = <&main_uart1_pins_default>;
 };
 
 &main_i2c1 {
-- 
2.40.0

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