It seems that thermal in Exynos 4210 is broken without this, as it will
never decrease cooling after increasing it.
Signed-off-by: Mateusz Majewski <m.majewski2@xxxxxxxxxxx>
---
arch/arm/boot/dts/samsung/exynos4210.dtsi | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/arch/arm/boot/dts/samsung/exynos4210.dtsi b/arch/arm/boot/dts/samsung/exynos4210.dtsi
index 0e27c3375e2e..aae185b7f91c 100644
--- a/arch/arm/boot/dts/samsung/exynos4210.dtsi
+++ b/arch/arm/boot/dts/samsung/exynos4210.dtsi
@@ -391,8 +391,14 @@ &cpu_alert2 {
};
&cpu_thermal {
- polling-delay-passive = <0>;
- polling-delay = <0>;
+ /* Exynos 4210 supports thermal interrupts, but only for the rising threshold.
+ * This means that polling is not needed for preventing overheating, but only
+ * for decreasing cooling when possible. Hence we poll with a high delay.
+ * Ideally, we would disable polling for the first trip point, but this isn't
+ * really possible without outrageous hacks.
+ */
+ polling-delay-passive = <5000>;
+ polling-delay = <5000>;
};
&gic {
--
2.41.0
