linux-kernel - Re: [PATCH 3/4] arm64: dts: rockchip: enable temperature driven fan control on Rock 5B

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Message-ID: <7c8b9bc2-94f8-46f7-8143-a78c834142ef@linaro.org>
Date: Wed, 24 Jan 2024 22:59:13 +0100
From: Daniel Lezcano <daniel.lezcano@...aro.org>
To: Alexey Charkov <alchark@...il.com>, Rob Herring <robh+dt@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>, Heiko Stuebner <heiko@...ech.de>
Cc: Dragan Simic <dsimic@...jaro.org>, devicetree@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-rockchip@...ts.infradead.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/4] arm64: dts: rockchip: enable temperature driven fan
 control on Rock 5B

On 24/01/2024 21:30, Alexey Charkov wrote:
> This enables thermal monitoring on Radxa Rock 5B and links the PWM
> fan as an active cooling device managed automatically by the thermal
> subsystem, with a target SoC temperature of 55C
> 
> Signed-off-by: Alexey Charkov <alchark@...il.com>

Acked-by: Daniel Lezcano <daniel.lezcano@...aro.org>

> ---
>   arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts | 25 ++++++++++++++++++++++++-
>   1 file changed, 24 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts b/arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts
> index 9b7bf6cec8bd..c4c94e0b6163 100644
> --- a/arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts
> +++ b/arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts
> @@ -52,7 +52,7 @@ led_rgb_b {
>   
>   	fan: pwm-fan {
>   		compatible = "pwm-fan";
> -		cooling-levels = <0 95 145 195 255>;
> +		cooling-levels = <0 120 150 180 210 240 255>;
>   		fan-supply = <&vcc5v0_sys>;
>   		pwms = <&pwm1 0 50000 0>;
>   		#cooling-cells = <2>;
> @@ -180,6 +180,25 @@ &cpu_l3 {
>   	cpu-supply = <&vdd_cpu_lit_s0>;
>   };
>   
> +&package_thermal {
> +	polling-delay = <1000>;
> +
> +	trips {
> +		package_fan: package-fan {
> +			temperature = <55000>;
> +			hysteresis = <2000>;
> +			type = "active";
> +		};
> +	};
> +
> +	cooling-maps {
> +		map-fan {
> +			trip = <&package_fan>;
> +			cooling-device = <&fan THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
> +		};
> +	};
> +};
> +
>   &i2c0 {
>   	pinctrl-names = "default";
>   	pinctrl-0 = <&i2c0m2_xfer>;
> @@ -738,6 +757,10 @@ regulator-state-mem {
>   	};
>   };
>   
> +&tsadc {
> +	status = "okay";
> +};
> +
>   &uart2 {
>   	pinctrl-0 = <&uart2m0_xfer>;
>   	status = "okay";
> 

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