LoongArch: dts: Add PWM support to Loongson-2K1000

The module is supported, enable it.

Also, add the pwm-fan and cooling-maps associated with it.

Reviewed-by: Yanteng Si <si.yanteng@linux.dev>
Signed-off-by: Binbin Zhou <zhoubinbin@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

Author: AaronDot

arch/loongarch/boot/dts/loongson-2k1000-ref.dts

@@ -5,6 +5,7 @@
 
 /dts-v1/;
 
+#include "dt-bindings/thermal/thermal.h"
 #include "loongson-2k1000.dtsi"
 
 / {
@@ -38,6 +39,13 @@
 			linux,cma-default;
 		};
 	};
+
+	fan0: pwm-fan {
+		compatible = "pwm-fan";
+		cooling-levels = <255 153 85 25>;
+		pwms = <&pwm1 0 100000 0>;
+		#cooling-cells = <2>;
+	};
 };
 
 &gmac0 {
@@ -92,6 +100,22 @@
 	#size-cells = <0>;
 };
 
+&pwm1 {
+	status = "okay";
+
+	pinctrl-0 = <&pwm1_pins_default>;
+	pinctrl-names = "default";
+};
+
+&cpu_thermal {
+	cooling-maps {
+		map0 {
+			trip = <&cpu_alert>;
+			cooling-device = <&fan0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+		};
+	};
+};
+
 &ehci0 {
 	status = "okay";
 };

arch/loongarch/boot/dts/loongson-2k1000.dtsi

@@ -68,7 +68,7 @@
 	};
 
 	thermal-zones {
-		cpu-thermal {
+		cpu_thermal: cpu-thermal {
 			polling-delay-passive = <1000>;
 			polling-delay = <5000>;
 			thermal-sensors = <&tsensor 0>;
@@ -322,6 +322,46 @@
 			status = "disabled";
 		};
 
+		pwm@1fe22000 {
+			compatible = "loongson,ls2k1000-pwm", "loongson,ls7a-pwm";
+			reg = <0x0 0x1fe22000 0x0 0x10>;
+			interrupt-parent = <&liointc0>;
+			interrupts = <24 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&clk LOONGSON2_APB_CLK>;
+			#pwm-cells = <3>;
+			status = "disabled";
+		};
+
+		pwm1: pwm@1fe22010 {
+			compatible = "loongson,ls2k1000-pwm", "loongson,ls7a-pwm";
+			reg = <0x0 0x1fe22010 0x0 0x10>;
+			interrupt-parent = <&liointc0>;
+			interrupts = <25 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&clk LOONGSON2_APB_CLK>;
+			#pwm-cells = <3>;
+			status = "disabled";
+		};
+
+		pwm@1fe22020 {
+			compatible = "loongson,ls2k1000-pwm", "loongson,ls7a-pwm";
+			reg = <0x0 0x1fe22020 0x0 0x10>;
+			interrupt-parent = <&liointc0>;
+			interrupts = <26 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&clk LOONGSON2_APB_CLK>;
+			#pwm-cells = <3>;
+			status = "disabled";
+		};
+
+		pwm@1fe22030 {
+			compatible = "loongson,ls2k1000-pwm", "loongson,ls7a-pwm";
+			reg = <0x0 0x1fe22030 0x0 0x10>;
+			interrupt-parent = <&liointc0>;
+			interrupts = <27 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&clk LOONGSON2_APB_CLK>;
+			#pwm-cells = <3>;
+			status = "disabled";
+		};
+
 		pmc: power-management@1fe27000 {
 			compatible = "loongson,ls2k1000-pmc", "loongson,ls2k0500-pmc", "syscon";
 			reg = <0x0 0x1fe27000 0x0 0x58>;