[PATCH v2 3/5] arm64: dts: mt7986: change cooling trips

Frank Wunderlich
2023-10-25T17:09:12Z

From: Frank Wunderlich <frank-w@public-files.de>

Add Critical and hot trips for emergency system shutdown and limiting
system load.

Change passive trip to active to make sure fan is activated on the
lowest trip.

Fixes: 1f5be05132f3 ("arm64: dts: mt7986: add thermal-zones")
Fixes: c26f779a2295 ("arm64: dts: mt7986: add pwm-fan and cooling-maps to BPI-R3 dts")
Suggested-by: Daniel Golle <daniel@makrotopia.org>
Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
---
v2:
- squash patch for bpi-r3 as suggested by angelo
---
.../dts/mediatek/mt7986a-bananapi-bpi-r3.dts | 10 +++++-----
arch/arm64/boot/dts/mediatek/mt7986a.dtsi | 20 +++++++++++++++----
2 files changed, 21 insertions(+), 9 deletions(-)

diff --git a/arch/arm64/boot/dts/mediatek/mt7986a-bananapi-bpi-r3.dts b/arch/arm64/boot/dts/mediatek/mt7986a-bananapi-bpi-r3.dts
index f9702284607a..b876e501216b 100644
--- a/arch/arm64/boot/dts/mediatek/mt7986a-bananapi-bpi-r3.dts
+++ b/arch/arm64/boot/dts/mediatek/mt7986a-bananapi-bpi-r3.dts
@@ -152,16 +152,16 @@ cpu-active-high {
trip = <&cpu_trip_active_high>;
};

- cpu-active-low {
+ cpu-active-med {
/* active: set fan to cooling level 1 */
cooling-device = <&fan 1 1>;
- trip = <&cpu_trip_active_low>;
+ trip = <&cpu_trip_active_med>;
};

- cpu-passive {
- /* passive: set fan to cooling level 0 */
+ cpu-active-low {
+ /* active: set fan to cooling level 0 */
cooling-device = <&fan 0 0>;
- trip = <&cpu_trip_passive>;
+ trip = <&cpu_trip_active_low>;
};
};
};
diff --git a/arch/arm64/boot/dts/mediatek/mt7986a.dtsi b/arch/arm64/boot/dts/mediatek/mt7986a.dtsi
index 77ddd9e44ed2..fc751e049953 100644
--- a/arch/arm64/boot/dts/mediatek/mt7986a.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt7986a.dtsi
@@ -614,22 +614,34 @@ cpu_thermal: cpu-thermal {
thermal-sensors = <&thermal 0>;

trips {
+ cpu_trip_crit: crit {
+ temperature = <125000>;
+ hysteresis = <2000>;
+ type = "critical";
+ };
+
+ cpu_trip_hot: hot {
+ temperature = <120000>;
+ hysteresis = <2000>;
+ type = "hot";
+ };
+
cpu_trip_active_high: active-high {
temperature = <115000>;
hysteresis = <2000>;
type = "active";
};

- cpu_trip_active_low: active-low {
+ cpu_trip_active_med: active-med {
temperature = <85000>;
hysteresis = <2000>;
type = "active";
};

- cpu_trip_passive: passive {
- temperature = <40000>;
+ cpu_trip_active_low: active-low {
+ temperature = <60000>;
hysteresis = <2000>;
- type = "passive";
+ type = "active";
};
};
};
--
2.34.1