[PATCH 16/18] riscv: dts: zhihe: add Melon Pi V1 and V2

[Han Gao via B4 Relay <devnull+gaohan.iscas.ac.cn@kernel.org>]

From: Han Gao <gaohan@iscas.ac.cn>

Add Melon Pi V1 and V2 with the UART4 console on GPIO2_0 and GPIO2_1.
Use serial aliases to preserve physical UART numbering.

Signed-off-by: Han Gao <gaohan@iscas.ac.cn>
---
 arch/riscv/boot/dts/Makefile                       |  1 +
 arch/riscv/boot/dts/zhihe/Makefile                 |  2 +
 arch/riscv/boot/dts/zhihe/a210-melonpi-common.dtsi | 55 ++++++++++++++++++++++
 arch/riscv/boot/dts/zhihe/a210-melonpi-v1.dts      |  9 ++++
 arch/riscv/boot/dts/zhihe/a210-melonpi-v2.dts      |  9 ++++
 5 files changed, 76 insertions(+)

diff --git a/arch/riscv/boot/dts/Makefile b/arch/riscv/boot/dts/Makefile
index 69d8751fb17c..445edde8f107 100644
--- a/arch/riscv/boot/dts/Makefile
+++ b/arch/riscv/boot/dts/Makefile
@@ -12,3 +12,4 @@ subdir-y += spacemit
 subdir-y += starfive
 subdir-y += tenstorrent
 subdir-y += thead
+subdir-y += zhihe
diff --git a/arch/riscv/boot/dts/zhihe/Makefile b/arch/riscv/boot/dts/zhihe/Makefile
new file mode 100644
index 000000000000..553102091d4f
--- /dev/null
+++ b/arch/riscv/boot/dts/zhihe/Makefile
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0
+dtb-$(CONFIG_ARCH_ZHIHE) += a210-melonpi-v1.dtb a210-melonpi-v2.dtb
diff --git a/arch/riscv/boot/dts/zhihe/a210-melonpi-common.dtsi b/arch/riscv/boot/dts/zhihe/a210-melonpi-common.dtsi
new file mode 100644
index 000000000000..7a6e6af0aa1f
--- /dev/null
+++ b/arch/riscv/boot/dts/zhihe/a210-melonpi-common.dtsi
@@ -0,0 +1,55 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+
+#include "a210-som.dtsi"
+
+/ {
+	aliases {
+		serial0 = &uart0;
+		serial1 = &uart1;
+		serial2 = &uart2;
+		serial3 = &uart3;
+		serial4 = &uart4;
+		serial5 = &uart5;
+		serial6 = &uart6;
+		serial7 = &uart7;
+		serial8 = &uart8;
+		serial9 = &uart9;
+	};
+
+	chosen {
+		stdout-path = "serial4:115200n8";
+	};
+};
+
+&peri2_padctrl {
+	status = "okay";
+
+	uart4_pins: uart4-0 {
+		rx-pins {
+			bias-disable;
+			drive-strength = <1>;
+			function = "uart4";
+			input-enable;
+			input-schmitt-enable;
+			pins = "GPIO2_1";
+			slew-rate = <0>;
+		};
+
+		tx-pins {
+			bias-disable;
+			drive-strength = <3>;
+			function = "uart4";
+			input-disable;
+			input-schmitt-disable;
+			pins = "GPIO2_0";
+			slew-rate = <0>;
+		};
+	};
+};
+
+&uart4 {
+	pinctrl-0 = <&uart4_pins>;
+	pinctrl-names = "default";
+
+	status = "okay";
+};
diff --git a/arch/riscv/boot/dts/zhihe/a210-melonpi-v1.dts b/arch/riscv/boot/dts/zhihe/a210-melonpi-v1.dts
new file mode 100644
index 000000000000..a88e9b949c4a
--- /dev/null
+++ b/arch/riscv/boot/dts/zhihe/a210-melonpi-v1.dts
@@ -0,0 +1,9 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+/dts-v1/;
+
+#include "a210-melonpi-common.dtsi"
+
+/ {
+	compatible = "zhihe,a210-melonpi-v1", "zhihe,a210-som", "zhihe,a210";
+	model = "Melon Pi V1";
+};
diff --git a/arch/riscv/boot/dts/zhihe/a210-melonpi-v2.dts b/arch/riscv/boot/dts/zhihe/a210-melonpi-v2.dts
new file mode 100644
index 000000000000..71752471c5fb
--- /dev/null
+++ b/arch/riscv/boot/dts/zhihe/a210-melonpi-v2.dts
@@ -0,0 +1,9 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+/dts-v1/;
+
+#include "a210-melonpi-common.dtsi"
+
+/ {
+	compatible = "zhihe,a210-melonpi-v2", "zhihe,a210-som", "zhihe,a210";
+	model = "Melon Pi V2";
+};

-- 
2.55.0