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mediatek: mt7981: improve fan behaviour

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This doubles the number of cooling-levels.
In addition the fan is turned on with a low speed at lower temperatures
and with a higher speed at higher temperatures.
This also attempts to reduce the likelihood of constant start-stop actions.

The change only affects the GL.iNet MT3000 and has been tested with it.

Signed-off-by: Łukasz M <lukasz1992m@gmail.com>
This commit is contained in:
Łukasz M 2023-10-31 16:15:06 +01:00 committed by David Bauer
parent 0c47bdb902
commit 5a603c7a31
2 changed files with 64 additions and 40 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

52
target/linux/mediatek/files-5.15/arch/arm64/boot/dts/mediatek/mt7981.dtsi
View File

@ -55,8 +55,8 @@
fan: pwm-fan {
compatible = "pwm-fan";
/* cooling level (0, 1, 2, 3) : (0% duty, 50% duty, 75% duty, 100% duty) */
cooling-levels = <0 128 192 255>;
/* cooling level (0, 1, 2, 3, 4, 5, 6, 7) : (0%/25%/37.5%/50%/62.5%/75%/87.5%/100% duty) */
cooling-levels = <0 63 95 127 159 191 223 255>;
#cooling-cells = <2>;
status = "disabled";
};
@ -67,55 +67,67 @@
polling-delay = <1000>;
thermal-sensors = <&thermal 0>;
trips {
cpu_trip_crit: crit {
temperature = <125000>;
cpu_trip_active_highest: active-highest {
temperature = <70000>;
hysteresis = <2000>;
type = "critical";
};
cpu_trip_hot: hot {
temperature = <120000>;
hysteresis = <2000>;
type = "hot";
type = "active";
};
cpu_trip_active_high: active-high {
temperature = <115000>;
temperature = <60000>;
hysteresis = <2000>;
type = "active";
};
cpu_trip_active_med: active-med {
temperature = <85000>;
temperature = <50000>;
hysteresis = <2000>;
type = "active";
};
cpu_trip_active_low: active-low {
temperature = <60000>;
temperature = <45000>;
hysteresis = <2000>;
type = "active";
};
cpu_trip_active_lowest: active-lowest {
temperature = <40000>;
hysteresis = <2000>;
type = "active";
};
};
cooling-maps {
cpu-active-highest {
/* active: set fan to cooling level 7 */
cooling-device = <&fan 7 7>;
trip = <&cpu_trip_active_highest>;
};
cpu-active-high {
/* active: set fan to cooling level 3 */
cooling-device = <&fan 3 3>;
/* active: set fan to cooling level 5 */
cooling-device = <&fan 5 5>;
trip = <&cpu_trip_active_high>;
};
cpu-active-med {
/* active: set fan to cooling level 2 */
cooling-device = <&fan 2 2>;
/* active: set fan to cooling level 3 */
cooling-device = <&fan 3 3>;
trip = <&cpu_trip_active_med>;
};
cpu-active-low {
/* passive: set fan to cooling level 1 */
cooling-device = <&fan 1 1>;
/* active: set fan to cooling level 2 */
cooling-device = <&fan 2 2>;
trip = <&cpu_trip_active_low>;
};
cpu-active-lowest {
/* active: set fan to cooling level 1 */
cooling-device = <&fan 1 1>;
trip = <&cpu_trip_active_lowest>;
};
};
};
};

52
target/linux/mediatek/files-6.1/arch/arm64/boot/dts/mediatek/mt7981.dtsi
View File

@ -55,8 +55,8 @@
fan: pwm-fan {
compatible = "pwm-fan";
/* cooling level (0, 1, 2, 3) : (0% duty, 50% duty, 75% duty, 100% duty) */
cooling-levels = <0 128 192 255>;
/* cooling level (0, 1, 2, 3, 4, 5, 6, 7) : (0%/25%/37.5%/50%/62.5%/75%/87.5%/100% duty) */
cooling-levels = <0 63 95 127 159 191 223 255>;
#cooling-cells = <2>;
status = "disabled";
};
@ -67,55 +67,67 @@
polling-delay = <1000>;
thermal-sensors = <&thermal 0>;
trips {
cpu_trip_crit: crit {
temperature = <125000>;
cpu_trip_active_highest: active-highest {
temperature = <70000>;
hysteresis = <2000>;
type = "critical";
};
cpu_trip_hot: hot {
temperature = <120000>;
hysteresis = <2000>;
type = "hot";
type = "active";
};
cpu_trip_active_high: active-high {
temperature = <115000>;
temperature = <60000>;
hysteresis = <2000>;
type = "active";
};
cpu_trip_active_med: active-med {
temperature = <85000>;
temperature = <50000>;
hysteresis = <2000>;
type = "active";
};
cpu_trip_active_low: active-low {
temperature = <60000>;
temperature = <45000>;
hysteresis = <2000>;
type = "active";
};
cpu_trip_active_lowest: active-lowest {
temperature = <40000>;
hysteresis = <2000>;
type = "active";
};
};
cooling-maps {
cpu-active-highest {
/* active: set fan to cooling level 7 */
cooling-device = <&fan 7 7>;
trip = <&cpu_trip_active_highest>;
};
cpu-active-high {
/* active: set fan to cooling level 3 */
cooling-device = <&fan 3 3>;
/* active: set fan to cooling level 5 */
cooling-device = <&fan 5 5>;
trip = <&cpu_trip_active_high>;
};
cpu-active-med {
/* active: set fan to cooling level 2 */
cooling-device = <&fan 2 2>;
/* active: set fan to cooling level 3 */
cooling-device = <&fan 3 3>;
trip = <&cpu_trip_active_med>;
};
cpu-active-low {
/* passive: set fan to cooling level 1 */
cooling-device = <&fan 1 1>;
/* active: set fan to cooling level 2 */
cooling-device = <&fan 2 2>;
trip = <&cpu_trip_active_low>;
};
cpu-active-lowest {
/* active: set fan to cooling level 1 */
cooling-device = <&fan 1 1>;
trip = <&cpu_trip_active_lowest>;
};
};
};
};