On 18-02-16, 14:13, Krzysztof Kozlowski wrote: > After adding cpufreq-dt support to Exynos542x, the Odroid XU3-Lite can > be easily overheated when launching eight CPU-intensive tasks: > thermal thermal_zone3: critical temperature reached(121 C),shutting down > > This seems to be specific to Odroid XU3-Lite board which officially > supports lower frequencies than regular XU3 or XU4. When working at > maximum CPU speed (1800 MHz big and 1300 MHz LITTLE) in warmer place for > longer time, the fan fails to cool down the board and it reaches > critical temperature. > > Add CPU cooling to Exynos5422/5800 to fix this issue. When reaching last > interrupt-driven trip-point (70 degrees of Celsius) start passive > cooling in polling mode (slowing CPU by 2 steps). When reaching 85 > degrees of Celsius, start slowing even more, down to 600 MHz. > > Signed-off-by: Krzysztof Kozlowski <[email protected]> > > --- > > Changes since v1: > 1. Use polling mode for passive cooling (number of configurable trip > points in TMU exceeded). > > 2. Adjust the values (temperature and cooling levels). > --- > arch/arm/boot/dts/exynos5422-cpu-thermal.dtsi | 46 > ++++++++++++++++++++++++++- > 1 file changed, 45 insertions(+), 1 deletion(-)
Acked-by: Viresh Kumar <[email protected]> -- viresh
