lkml.org 
[lkml]   [2023]   [Aug]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 01/11] ARM: dts: exynos: enable polling in Exynos 4210
Date
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@samsung.com>
---
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
\
 
 \ /
  Last update: 2023-08-29 11:25    [W:0.354 / U:0.176 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site