From abd000dbaee45fa620ddaeb13757b9a8985ce50f Mon Sep 17 00:00:00 2001
From: Binbin Zhou <zhoubinbin@loongson.cn>
Date: Thu, 5 Jun 2025 20:34:34 +0800
Subject: [PATCH] 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>
---
.../boot/dts/loongson-2k1000-ref.dts | 24 +++++++++++
arch/loongarch/boot/dts/loongson-2k1000.dtsi | 42 ++++++++++++++++++-
2 files changed, 65 insertions(+), 1 deletion(-)
diff --git a/arch/loongarch/boot/dts/loongson-2k1000-ref.dts b/arch/loongarch/boot/dts/loongson-2k1000-ref.dts
index 3514ea78f525..78ea995abf1c 100644
--- a/arch/loongarch/boot/dts/loongson-2k1000-ref.dts
+++ b/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";
};
diff --git a/arch/loongarch/boot/dts/loongson-2k1000.dtsi b/arch/loongarch/boot/dts/loongson-2k1000.dtsi
index 8dff2aa52417..1da3beb00f0e 100644
--- a/arch/loongarch/boot/dts/loongson-2k1000.dtsi
+++ b/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>;
--
2.49.0