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mvebu: enable thermal zone polling for IEI Puzzle devices

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Marvell's thermal sensors do not support interrupts, so we need to
poll them. Reading temperature every second should be enough to
control the fan.
While at it, also make sure fan speed is reduced again if temperature
goes down.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
(cherry picked from commit fc177695e00e80afd30d20d29f6e915edc9e9eb9)
This commit is contained in:
Daniel Golle 2024-03-17 15:55:09 +00:00
parent 100a5606d6
commit f02920dd98
1 changed files with 6 additions and 3 deletions

9
target/linux/mvebu/files/arch/arm64/boot/dts/marvell/puzzle-thermal.dtsi

@ -1,4 +1,7 @@
#define PUZZLE_FAN_THERMAL(_cname, _fan) \
polling-delay-passive = <500>; \
polling-delay = <1000>; \
\
trips { \
_cname##_active_high: cpu-active-high { \
temperature = <80000>; \
@ -28,14 +31,14 @@
}; \
cpu-active-med { \
trip = <&_cname##_active_med>; \
cooling-device = <_fan 2 THERMAL_NO_LIMIT>; \
cooling-device = <_fan 2 3>; \
}; \
cpu-active-low { \
trip = <&_cname##_active_low>; \
cooling-device = <_fan 1 THERMAL_NO_LIMIT>; \
cooling-device = <_fan 1 2>; \
}; \
cpu-active-idle { \
trip = <&_cname##_active_idle>; \
cooling-device = <_fan 0 THERMAL_NO_LIMIT>; \
cooling-device = <_fan 0 0>; \
}; \
}