[PATCH v3 2/3] riscv: dts: sophgo: cv180x: Add PWR_GPIO controller

The CV180x/CV181x family has an additional DesignWare APB GPIO
controller (PWR_GPIO) located in the always-on power domain at
0x5021000. Add the node so that boards can reference GPIOs in this
bank, such as status LEDs.

Signed-off-by: Chen-Yu Yeh <[email protected]>
---
The base address and interrupt number match the vendor SDK device
tree (cv181x_base_riscv.dtsi: gpio@05021000, PLIC interrupt 70,
i.e. SOC_PERIPHERAL_IRQ(54)). Verified on Milk-V Duo 256M hardware
via the onboard status LED on porte 2.

 arch/riscv/boot/dts/sophgo/cv180x.dtsi | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/arch/riscv/boot/dts/sophgo/cv180x.dtsi b/arch/riscv/boot/dts/sophgo/cv180x.dtsi
index 06b0ce5a2db7..25ad2bd265d7 100644
--- a/arch/riscv/boot/dts/sophgo/cv180x.dtsi
+++ b/arch/riscv/boot/dts/sophgo/cv180x.dtsi
@@ -160,6 +160,24 @@ portd: gpio-controller@0 {
 			};
 		};
 
+		gpio4: gpio@5021000 {
+			compatible = "snps,dw-apb-gpio";
+			reg = <0x5021000 0x1000>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			porte: gpio-controller@0 {
+				compatible = "snps,dw-apb-gpio-port";
+				gpio-controller;
+				#gpio-cells = <2>;
+				ngpios = <32>;
+				reg = <0>;
+				interrupt-controller;
+				#interrupt-cells = <2>;
+				interrupts = <SOC_PERIPHERAL_IRQ(54) IRQ_TYPE_LEVEL_HIGH>;
+			};
+		};
+
 		saradc: adc@30f0000 {
 			compatible = "sophgo,cv1800b-saradc";
 			reg = <0x030f0000 0x1000>;
-- 
2.43.0