linux-kernel - [PATCH 1/2] riscv: sophgo: dts: add pwm-fan for Milk-V Pioneer

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Message-Id: <dd23362328f77dd91aa9354848bbb0abad0f554b.1739351437.git.unicorn_wang@outlook.com>
Date: Wed, 12 Feb 2025 17:42:02 +0800
From: Chen Wang <unicornxw@...il.com>
To: aou@...s.berkeley.edu,
	unicorn_wang@...look.com,
	conor+dt@...nel.org,
	guoren@...nel.org,
	inochiama@...look.com,
	krzk+dt@...nel.org,
	palmer@...belt.com,
	paul.walmsley@...ive.com,
	robh@...nel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-riscv@...ts.infradead.org,
	chao.wei@...hgo.com,
	xiaoguang.xing@...hgo.com,
	chunzhi.lin@...hgo.com,
	inochiama@...il.com,
	sophgo@...ts.linux.dev
Subject: [PATCH 1/2] riscv: sophgo: dts: add pwm-fan for Milk-V Pioneer

From: Chen Wang <unicorn_wang@...look.com>

Milk-V Pioneer uses fan as cooling-device, and speed of the fan is
controlled by the first channel of pwm controller of SG2042.

Signed-off-by: Chen Wang <unicorn_wang@...look.com>
---
 arch/riscv/boot/dts/sophgo/sg2042-milkv-pioneer.dts | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/riscv/boot/dts/sophgo/sg2042-milkv-pioneer.dts b/arch/riscv/boot/dts/sophgo/sg2042-milkv-pioneer.dts
index be596d01ff8d..74c997ed8283 100644
--- a/arch/riscv/boot/dts/sophgo/sg2042-milkv-pioneer.dts
+++ b/arch/riscv/boot/dts/sophgo/sg2042-milkv-pioneer.dts
@@ -73,6 +73,13 @@ &uart0 {
 };
 
 / {
+	pwmfan: pwm-fan {
+		compatible = "pwm-fan";
+		cooling-levels = <103 128 179 230 255>;
+		pwms = <&pwm 0 40000 0>;
+		#cooling-cells = <2>;
+	};
+
 	thermal-zones {
 		soc-thermal {
 			polling-delay-passive = <1000>;
-- 
2.34.1