Commit fdc7bd90 authored by Sam Edwards's avatar Sam Edwards Committed by Heiko Stuebner
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arm64: dts: rockchip: Allow Turing RK1 cooling fan to spin down 



The RK3588 thermal sensor driver only receives interrupts when a
higher-temperature threshold is crossed; it cannot notify when the
sensor cools back off. As a result, the driver must poll for temperature
changes to detect when the conditions for a thermal trip are no longer
met. However, it only does so if the DT enables polling.

Before this patch, the RK1 DT did not enable polling, causing the fan to
continue running at the speed corresponding to the highest temperature
reached.

Follow suit with similar RK3588 boards by setting a polling-delay of
1000ms, enabling the driver to detect when the sensor cools back off,
allowing the fan speed to decrease as appropriate.

Fixes: 7c8ec5e6 ("arm64: dts: rockchip: Enable automatic fan control on Turing RK1")
Cc: stable@kernel.org # v6.13+
Signed-off-by: default avatarSam Edwards <CFSworks@gmail.com>
Reviewed-by: default avatarDragan Simic <dsimic@manjaro.org>
Link: https://lore.kernel.org/r/20250329165017.3885-1-CFSworks@gmail.com


Signed-off-by: default avatarHeiko Stuebner <heiko@sntech.de>
parent 0af2f6be

arch/arm64/boot/dts/rockchip/rk3588-turing-rk1.dtsi

+2 −0
Original line number Diff line number Diff line
@@ -214,6 +214,8 @@ rgmii_phy: ethernet-phy@1 { 
};



&package_thermal {

	polling-delay = <1000>;



	trips {

		package_active1: trip-active1 {

			temperature = <45000>;