arm64: dts: rockchip: add overlay for UART2 on the GPIO header on Flipper One

Signed-off-by: Alexey Charkov <alchark@flipper.net>

Author: alchark

arch/arm64/boot/dts/rockchip/Makefile

@@ -175,6 +175,7 @@ dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3576-flipper-one-rev-f0b0c1.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3576-flipper-one-rev-f0b1c2.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3576-flipper-one-i2c2-free.dtbo
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3576-flipper-one-sata.dtbo
+dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3576-flipper-one-uart2.dtbo
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3576-khadas-edge-2l.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3576-luckfox-omni3576.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3576-nanopi-m5.dtb
@@ -324,6 +325,10 @@ dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3576-flipper-one-sata.dtb
 rk3576-flipper-one-sata-dtbs := rk3576-flipper-one-rev-f0b0c1.dtb \
 	rk3576-flipper-one-sata.dtbo
 
+dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3576-flipper-one-uart2.dtb
+rk3576-flipper-one-uart2-dtbs := rk3576-flipper-one-rev-f0b0c1.dtb \
+	rk3576-flipper-one-uart2.dtbo
+
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3588-edgeble-neu6a-wifi.dtb
 rk3588-edgeble-neu6a-wifi-dtbs := rk3588-edgeble-neu6a-io.dtb \
 	rk3588-edgeble-neu6a-wifi.dtbo

arch/arm64/boot/dts/rockchip/rk3576-flipper-one-uart2.dtso

@@ -0,0 +1,13 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * DT-overlay to enable UART2 on the GPIO header on Flipper One
+ */
+
+/dts-v1/;
+/plugin/;
+
+&uart2 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart2m1_xfer>;
+	status = "okay";
+};