[openwrt/openwrt] mvebu: enable thermal zone polling for IEI Puzzle devices

[LEDE Commits]

dangole pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/fc177695e00e80afd30d20d29f6e915edc9e9eb9

commit fc177695e00e80afd30d20d29f6e915edc9e9eb9
Author: Daniel Golle <daniel at makrotopia.org>
AuthorDate: Sun Mar 17 15:55:09 2024 +0000

    mvebu: enable thermal zone polling for IEI Puzzle devices
    
    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 at makrotopia.org>
---
 .../mvebu/files/arch/arm64/boot/dts/marvell/puzzle-thermal.dtsi  | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/target/linux/mvebu/files/arch/arm64/boot/dts/marvell/puzzle-thermal.dtsi b/target/linux/mvebu/files/arch/arm64/boot/dts/marvell/puzzle-thermal.dtsi
index 94677532f2..a8ce8fd102 100644
--- a/target/linux/mvebu/files/arch/arm64/boot/dts/marvell/puzzle-thermal.dtsi
+++ b/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>;				\
 		};								\
 	}