i have Banana Pi BPI-R3 Fan Heat Sink for BPI-R3 .
when i turn on the banana the fan works but stop before the open wrt finish booting.
i tried 23.05.0-rc2 (r23228-cd17d8df2a) and
SNAPSHOT (r23684-881235c713) .
Openwrt Custom rom by SINOVOIP is working :
ur assist is welcome.
it seems that the fan start to work at 85 due to misconfiguration in beta and nightly build - it will be fixed in next builds.
i use a workaround by changing
/sys/class/thermal/thermal_zone0/trip_point_1_temp to 32000
i added to startup the line below and its keeping the value after restart
echo 32000 > /sys/class/thermal/thermal_zone0/trip_point_1_temp
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