[PATCH 12/12] riscv: dts: ultrarisc: Add Milk-V Titan board device tree

From: Jia Wang via B4 Relay

Date: Mon Aug 24 2026 - 02:23:30 EST

From: Jia Wang <wangjia@xxxxxxxxxxxxx>

Milk-V Titan is an ITX motherboard based on the UltraRISC DP1000 SoC.

Link: https://milkv.io/docs/titan/overview
Signed-off-by: Jia Wang <wangjia@xxxxxxxxxxxxx>
---
arch/riscv/boot/dts/ultrarisc/Makefile | 1 +
.../dts/ultrarisc/dp1000-milkv-titan-pinctrl.dtsi | 108 +++++++++++
.../boot/dts/ultrarisc/dp1000-milkv-titan.dts | 203 +++++++++++++++++++++
3 files changed, 312 insertions(+)

diff --git a/arch/riscv/boot/dts/ultrarisc/Makefile b/arch/riscv/boot/dts/ultrarisc/Makefile
index 454d849a6ce4..dfd15c064d07 100644
--- a/arch/riscv/boot/dts/ultrarisc/Makefile
+++ b/arch/riscv/boot/dts/ultrarisc/Makefile
@@ -1,2 +1,3 @@
# SPDX-License-Identifier: GPL-2.0
+dtb-$(CONFIG_ARCH_ULTRARISC) += dp1000-milkv-titan.dtb
dtb-$(CONFIG_ARCH_ULTRARISC) += dp1000-shenrongda-m0.dtb
diff --git a/arch/riscv/boot/dts/ultrarisc/dp1000-milkv-titan-pinctrl.dtsi b/arch/riscv/boot/dts/ultrarisc/dp1000-milkv-titan-pinctrl.dtsi
new file mode 100644
index 000000000000..7a812e40a249
--- /dev/null
+++ b/arch/riscv/boot/dts/ultrarisc/dp1000-milkv-titan-pinctrl.dtsi
@@ -0,0 +1,108 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright(C) 2026 UltraRISC Technology (Shanghai) Co., Ltd.
+ */
+
+#include "dp1000.dtsi"
+#include "dp1000-pinctrl.h"
+
+&pinctrl {
+ i2c0_pins: i2c0-pins {
+ pins = <PA12 PA13>;
+ function = "i2c";
+ bias-pull-up;
+ drive-strength = <33>;
+ };
+
+ i2c1_pins: i2c1-pins {
+ pins = <PB6 PB7>;
+ function = "i2c";
+ bias-pull-up;
+ drive-strength = <33>;
+ };
+
+ i2c2_pins: i2c2-pins {
+ pins = <PC0 PC1>;
+ function = "i2c";
+ bias-pull-up;
+ drive-strength = <33>;
+ };
+
+ i2c3_pins: i2c3-pins {
+ pins = <PC2 PC3>;
+ function = "i2c";
+ bias-pull-up;
+ drive-strength = <33>;
+ };
+
+ io_pins: io-pins {
+ pins = <PA10 PA15 PB0 PB1 PB2 PD6 PD7>;
+ function = "gpio";
+ bias-pull-up;
+ drive-strength = <33>;
+ };
+
+ gpio_keys_pins: gpio-keys-pins {
+ pins = <PA4 PA11 PA14>;
+ function = "gpio";
+ bias-pull-up;
+ drive-strength = <33>;
+ };
+
+ mux_dcdc_i2c_pins: mux-dcdc-i2c-pins {
+ pins = <PA5>;
+ function = "gpio";
+ };
+
+ mux_i2c3_pins: mux-i2c3-pins {
+ pins = <PA6>;
+ function = "gpio";
+ };
+
+ mux_uart0_pins: mux-uart0-pins {
+ pins = <PA7>;
+ function = "gpio";
+ };
+
+ spi0_pins: spi0-pins {
+ pins = <PD0 PD1 PD2 PD3 PD4 PD5>;
+ function = "spi";
+ bias-pull-up;
+ drive-strength = <33>;
+ };
+
+ spi1_pins: spi1-pins {
+ pins = <PA0 PA1 PA2 PA3>;
+ function = "spi";
+ bias-pull-up;
+ drive-strength = <33>;
+ };
+
+ uart0_pins: uart0-pins {
+ pins = <PA8 PA9>;
+ function = "uart";
+ bias-pull-up;
+ drive-strength = <33>;
+ };
+
+ uart1_pins: uart1-pins {
+ pins = <PB4 PB5>;
+ function = "uart";
+ bias-pull-up;
+ drive-strength = <33>;
+ };
+
+ uart2_pins: uart2-pins {
+ pins = <PC4 PC5>;
+ function = "uart";
+ bias-pull-up;
+ drive-strength = <33>;
+ };
+
+ uart3_pins: uart3-pins {
+ pins = <PC6 PC7>;
+ function = "uart";
+ bias-pull-up;
+ drive-strength = <33>;
+ };
+};
diff --git a/arch/riscv/boot/dts/ultrarisc/dp1000-milkv-titan.dts b/arch/riscv/boot/dts/ultrarisc/dp1000-milkv-titan.dts
new file mode 100644
index 000000000000..f1a0efee3d74
--- /dev/null
+++ b/arch/riscv/boot/dts/ultrarisc/dp1000-milkv-titan.dts
@@ -0,0 +1,203 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright(C) 2026 UltraRISC Technology (Shanghai) Co., Ltd.
+ */
+
+#include "dp1000-milkv-titan-pinctrl.dtsi"
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/input/gpio-keys.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/leds/common.h>
+
+/ {
+ model = "Milk-V Titan";
+ compatible = "milkv,titan", "ultrarisc,dp1000";
+
+ aliases {
+ serial0 = &uart0;
+ serial1 = &uart1;
+ serial2 = &uart2;
+ serial3 = &uart3;
+ };
+
+ chosen {
+ stdout-path = "serial0:115200n8";
+ };
+
+ gpio-keys {
+ compatible = "gpio-keys";
+ pinctrl-names = "default";
+ pinctrl-0 = <&gpio_keys_pins>;
+
+ key-wakeup-0 {
+ label = "Wake-Up";
+ gpios = <&gpio_a 14 GPIO_ACTIVE_LOW>;
+ linux,code = <KEY_WAKEUP>;
+ linux,input-type = <EV_KEY>;
+ debounce-interval = <10>;
+ wakeup-source;
+ wakeup-event-action = <EV_ACT_ASSERTED>;
+ };
+
+ key-wakeup-1 {
+ label = "Power";
+ gpios = <&gpio_a 11 GPIO_ACTIVE_LOW>;
+ linux,code = <KEY_POWER>;
+ linux,input-type = <EV_KEY>;
+ debounce-interval = <10>;
+ wakeup-source;
+ wakeup-event-action = <EV_ACT_ASSERTED>;
+ };
+
+ key-wakeup-2 {
+ label = "Wake-Up-by-USB";
+ interrupts-extended = <&gpio_a 4 IRQ_TYPE_EDGE_FALLING>;
+ linux,code = <KEY_WAKEUP>;
+ linux,input-type = <EV_KEY>;
+ debounce-interval = <10>;
+ wakeup-source;
+ };
+ };
+};
+
+&i2c0 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&i2c0_pins>;
+};
+
+&i2c1 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&i2c1_pins>;
+};
+
+&i2c2 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&i2c2_pins>;
+
+ rtc@68 {
+ compatible = "st,m41t11";
+ reg = <0x68>;
+ };
+};
+
+&i2c3 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&i2c3_pins>;
+};
+
+&spi0 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&spi0_pins>;
+};
+
+&spi1 {
+ num-cs = <1>;
+
+ pinctrl-names = "default";
+ pinctrl-0 = <&spi1_pins>;
+};
+
+&uart0 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&uart0_pins>;
+};
+
+&uart1 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&uart1_pins>;
+};
+
+&uart2 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&uart2_pins>;
+};
+
+&uart3 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&uart3_pins>;
+};
+
+&pcie_x16 {
+ status = "okay";
+};
+
+&pcie_x4a {
+ status = "okay";
+};
+
+&pcie_x4b {
+ status = "okay";
+};
+
+&gpio {
+ pinctrl-names = "default";
+ pinctrl-0 = <&io_pins &mux_dcdc_i2c_pins &mux_i2c3_pins &mux_uart0_pins>;
+};
+
+&gpio_a {
+ dcdc-i2c-mux-hog {
+ gpio-hog;
+ gpios = <5 GPIO_ACTIVE_HIGH>;
+ output-low;
+ line-name = "dcdc-i2c-mux";
+ };
+
+ i2c3-mux-hog {
+ gpio-hog;
+ gpios = <6 GPIO_ACTIVE_HIGH>;
+ output-low;
+ line-name = "i2c3-mux";
+ };
+
+ uart0-mux-hog {
+ gpio-hog;
+ gpios = <7 GPIO_ACTIVE_HIGH>;
+ output-high;
+ line-name = "uart0-mux";
+ };
+};
+
+&ethernet {
+ phy-handle = <&phy0>;
+ /*
+ * RTL8211F: board timing uses PHY strap delays; keep plain "rgmii".
+ * Enabling PHY internal delays via "rgmii-id" breaks Ethernet traffic.
+ */
+ phy-mode = "rgmii";
+
+ status = "okay";
+
+ mdio {
+ compatible = "snps,dwmac-mdio";
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ phy0: phy@0 {
+ reg = <0>;
+
+ leds {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ led@1 {
+ label = "eth-link";
+ reg = <1>;
+ color = <LED_COLOR_ID_YELLOW>;
+ function = LED_FUNCTION_INDICATOR;
+ default-state = "keep";
+ linux,default-trigger = "netdev";
+ };
+
+ led@2 {
+ label = "eth-activity";
+ reg = <2>;
+ color = <LED_COLOR_ID_GREEN>;
+ function = LED_FUNCTION_ACTIVITY;
+ default-state = "keep";
+ linux,default-trigger = "netdev";
+ };
+ };
+ };
+ };
+};

--
2.34.1