feat: add rockchip-uart-tx-dma

* closes radxa-pkg#366
CodeChenL · Sep 5, 2024 · 149a915 · 149a915
1 parent 9b778dc
commit 149a915
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Showing 2 changed files with 53 additions and 1 deletion.
diff --git a/arch/arm64/boot/dts/rockchip/overlays/Makefile b/arch/arm64/boot/dts/rockchip/overlays/Makefile
@@ -549,7 +549,8 @@ dtb-$(CONFIG_CPU_RK3588) += \
 	rock-5b-plus-radxa-display-10hd.dtbo \
 	rock-5d-radxa-camera-4k.dtbo
 
-dtb-$(CONFIG_ARCH_ROCKCHIP) += rockchip-watchdog.dtbo
+dtb-$(CONFIG_ARCH_ROCKCHIP) += rockchip-watchdog.dtbo \
+	rockchip-uart-tx-dma.dtbo
 
 dtbotxt-$(CONFIG_ARCH_ROCKCHIP) += \
 	README.overlays

diff --git a/arch/arm64/boot/dts/rockchip/overlays/rockchip-uart-tx-dma.dts b/arch/arm64/boot/dts/rockchip/overlays/rockchip-uart-tx-dma.dts
@@ -0,0 +1,51 @@
+/dts-v1/;
+/plugin/;
+
+/ {
+	metadata {
+		title = "Switch all UART TX to DMA mode";
+		compatible = "rockchip,rk3566", "rockchip,rk3568", "rockchip,rk3588";
+		category = "misc";
+		description = "Switch all UART TX to DMA mode";
+	};
+};
+
+&uart0 {
+	dma-names = "tx";
+};
+
+&uart1 {
+	dma-names = "tx";
+};
+
+&uart2 {
+	dma-names = "tx";
+};
+
+&uart3 {
+	dma-names = "tx";
+};
+
+&uart4 {
+	dma-names = "tx";
+};
+
+&uart5 {
+	dma-names = "tx";
+};
+
+&uart6 {
+	dma-names = "tx";
+};
+
+&uart7 {
+	dma-names = "tx";
+};
+
+&uart8 {
+	dma-names = "tx";
+};
+
+&uart9 {
+	dma-names = "tx";
+};