From bca9e3dae96e89d35d19399fa836994031da58fd Mon Sep 17 00:00:00 2001
From: Dongjin Kim <tobetter@gmail.com>
Date: Fri, 6 Oct 2023 12:16:42 +0900
Subject: [PATCH] ODROID-M1/M1S: dtb/dtbo: add to switch FIQ debug port to
 UART2

By default, the debug port is binded to /dev/ttyFIQ0 for the FIQ
debugger. In order to switch the port to generic UART port,
'fiq-debugger' must be disabled and 'uart2' is required to be enabled
with proper pins.

Change-Id: I213cd319a119bde044458a59b2b0a1bded1f9546
Signed-off-by: Dongjin Kim <tobetter@gmail.com>
---
 .../dts/rockchip/overlays/odroidm1/Makefile   |  1 +
 .../overlays/odroidm1/fiq0_to_uart2.dts       | 23 +++++++++++++++++++
 .../dts/rockchip/overlays/odroidm1s/Makefile  |  1 +
 .../overlays/odroidm1s/fiq0_to_uart2.dts      | 23 +++++++++++++++++++
 4 files changed, 48 insertions(+)
 create mode 100644 arch/arm64/boot/dts/rockchip/overlays/odroidm1/fiq0_to_uart2.dts
 create mode 100644 arch/arm64/boot/dts/rockchip/overlays/odroidm1s/fiq0_to_uart2.dts

diff --git a/arch/arm64/boot/dts/rockchip/overlays/odroidm1/Makefile b/arch/arm64/boot/dts/rockchip/overlays/odroidm1/Makefile
index 7c0cf0aa8b3d..94e5a241be5e 100644
--- a/arch/arm64/boot/dts/rockchip/overlays/odroidm1/Makefile
+++ b/arch/arm64/boot/dts/rockchip/overlays/odroidm1/Makefile
@@ -5,6 +5,7 @@ dtbo-$(CONFIG_ARCH_ROCKCHIP_ODROIDM1) += \
 	can0.dtbo \
 	dht11.dtbo \
 	display_vu8m.dtbo \
+	fiq0_to_uart2.dtbo \
 	hktft32.dtbo \
 	i2c0.dtbo \
 	i2c1.dtbo \
diff --git a/arch/arm64/boot/dts/rockchip/overlays/odroidm1/fiq0_to_uart2.dts b/arch/arm64/boot/dts/rockchip/overlays/odroidm1/fiq0_to_uart2.dts
new file mode 100644
index 000000000000..b9c87c82aaa5
--- /dev/null
+++ b/arch/arm64/boot/dts/rockchip/overlays/odroidm1/fiq0_to_uart2.dts
@@ -0,0 +1,23 @@
+/dts-v1/;
+/plugin/;
+
+/{
+	fragment@0 {
+		target = <&fiq_debugger>;
+
+		__overlay__ {
+			status = "disabled";
+		};
+	};
+
+	fragment@1 {
+		target = <&uart2>;
+
+		__overlay__ {
+			status = "okay";
+
+			pinctrl-names = "default";
+			pinctrl-0 = <&uart2m0_xfer>;
+		};
+	};
+};
diff --git a/arch/arm64/boot/dts/rockchip/overlays/odroidm1s/Makefile b/arch/arm64/boot/dts/rockchip/overlays/odroidm1s/Makefile
index 214e29954c85..9e48f2764ed3 100644
--- a/arch/arm64/boot/dts/rockchip/overlays/odroidm1s/Makefile
+++ b/arch/arm64/boot/dts/rockchip/overlays/odroidm1s/Makefile
@@ -7,6 +7,7 @@ dtbo-$(CONFIG_ARCH_ROCKCHIP_ODROIDM1) += \
 	display_3_5.dtbo \
 	display_5_0.dtbo \
 	display_vu8s.dtbo \
+	fiq0_to_uart2.dtbo \
 	hktft32.dtbo \
 	i2c0.dtbo \
 	i2c1.dtbo \
diff --git a/arch/arm64/boot/dts/rockchip/overlays/odroidm1s/fiq0_to_uart2.dts b/arch/arm64/boot/dts/rockchip/overlays/odroidm1s/fiq0_to_uart2.dts
new file mode 100644
index 000000000000..b9c87c82aaa5
--- /dev/null
+++ b/arch/arm64/boot/dts/rockchip/overlays/odroidm1s/fiq0_to_uart2.dts
@@ -0,0 +1,23 @@
+/dts-v1/;
+/plugin/;
+
+/{
+	fragment@0 {
+		target = <&fiq_debugger>;
+
+		__overlay__ {
+			status = "disabled";
+		};
+	};
+
+	fragment@1 {
+		target = <&uart2>;
+
+		__overlay__ {
+			status = "okay";
+
+			pinctrl-names = "default";
+			pinctrl-0 = <&uart2m0_xfer>;
+		};
+	};
+};