[02/10] ARM64: dts: exynos: Add all CPUs in cooling maps

Message ID 74e23257aece9ceef48b1c1cf6c9bafcce3c6fbd.1542362530.git.viresh.kumar@linaro.org
State New
Headers show
Series
  • Untitled series #16421
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Commit Message

Viresh Kumar Nov. 16, 2018, 10:04 a.m.
Each CPU can (and does) participate in cooling down the system but the
DT only captures a handful of them, normally CPU0, in the cooling maps.
Things work by chance currently as under normal circumstances its the
first CPU of each cluster which is used by the operating systems to
probe the cooling devices. But as soon as this CPU ordering changes and
any other CPU is used to bring up the cooling device, we will start
seeing failures.

Also the DT is rather incomplete when we list only one CPU in the
cooling maps, as the hardware doesn't have any such limitations.

Update cooling maps to include all devices affected by individual trip
points.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>

---
 .../arm64/boot/dts/exynos/exynos5433-tmu.dtsi | 36 ++++++++++++-------
 1 file changed, 24 insertions(+), 12 deletions(-)

-- 
2.19.1.568.g152ad8e3369a

Comments

Krzysztof Kozlowski Nov. 18, 2018, 2:20 p.m. | #1
On Fri, Nov 16, 2018 at 03:34:25PM +0530, Viresh Kumar wrote:
> Each CPU can (and does) participate in cooling down the system but the

> DT only captures a handful of them, normally CPU0, in the cooling maps.

> Things work by chance currently as under normal circumstances its the

> first CPU of each cluster which is used by the operating systems to

> probe the cooling devices. But as soon as this CPU ordering changes and

> any other CPU is used to bring up the cooling device, we will start

> seeing failures.

> 

> Also the DT is rather incomplete when we list only one CPU in the

> cooling maps, as the hardware doesn't have any such limitations.

> 

> Update cooling maps to include all devices affected by individual trip

> points.

> 

> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>

> ---

>  .../arm64/boot/dts/exynos/exynos5433-tmu.dtsi | 36 ++++++++++++-------


Thanks, applied.

Best regards,
Krzysztof

Patch

diff --git a/arch/arm64/boot/dts/exynos/exynos5433-tmu.dtsi b/arch/arm64/boot/dts/exynos/exynos5433-tmu.dtsi
index fe3a0b14bee6..81b72393dd0d 100644
--- a/arch/arm64/boot/dts/exynos/exynos5433-tmu.dtsi
+++ b/arch/arm64/boot/dts/exynos/exynos5433-tmu.dtsi
@@ -55,37 +55,44 @@  thermal-zones {
 			map0 {
 				/* Set maximum frequency as 1800MHz  */
 				trip = <&atlas0_alert_0>;
-				cooling-device = <&cpu4 1 2>;
+				cooling-device = <&cpu4 1 2>, <&cpu5 1 2>,
+						 <&cpu6 1 2>, <&cpu7 1 2>;
 			};
 			map1 {
 				/* Set maximum frequency as 1700MHz  */
 				trip = <&atlas0_alert_1>;
-				cooling-device = <&cpu4 2 3>;
+				cooling-device = <&cpu4 2 3>, <&cpu5 2 3>,
+						 <&cpu6 2 3>, <&cpu7 2 3>;
 			};
 			map2 {
 				/* Set maximum frequency as 1600MHz  */
 				trip = <&atlas0_alert_2>;
-				cooling-device = <&cpu4 3 4>;
+				cooling-device = <&cpu4 3 4>, <&cpu5 3 4>,
+						 <&cpu6 3 4>, <&cpu7 3 4>;
 			};
 			map3 {
 				/* Set maximum frequency as 1500MHz  */
 				trip = <&atlas0_alert_3>;
-				cooling-device = <&cpu4 4 5>;
+				cooling-device = <&cpu4 4 5>, <&cpu5 4 5>,
+						 <&cpu6 4 5>, <&cpu7 4 5>;
 			};
 			map4 {
 				/* Set maximum frequency as 1400MHz  */
 				trip = <&atlas0_alert_4>;
-				cooling-device = <&cpu4 5 7>;
+				cooling-device = <&cpu4 5 7>, <&cpu5 5 7>,
+						 <&cpu6 5 7>, <&cpu7 5 7>;
 			};
 			map5 {
 				/* Set maximum frequencyas 1200MHz  */
 				trip = <&atlas0_alert_5>;
-				cooling-device = <&cpu4 7 9>;
+				cooling-device = <&cpu4 7 9>, <&cpu5 7 9>,
+						 <&cpu6 7 9>, <&cpu7 7 9>;
 			};
 			map6 {
 				/* Set maximum frequency as 1000MHz  */
 				trip = <&atlas0_alert_6>;
-				cooling-device = <&cpu4 9 14>;
+				cooling-device = <&cpu4 9 14>, <&cpu5 9 14>,
+						 <&cpu6 9 14>, <&cpu7 9 14>;
 			};
 		};
 	};
@@ -222,27 +229,32 @@  thermal-zones {
 			map0 {
 				/* Set maximum frequency as 1200MHz  */
 				trip = <&apollo_alert_2>;
-				cooling-device = <&cpu0 1 2>;
+				cooling-device = <&cpu0 1 2>, <&cpu1 1 2>,
+						 <&cpu2 1 2>, <&cpu3 1 2>;
 			};
 			map1 {
 				/* Set maximum frequency as 1100MHz  */
 				trip = <&apollo_alert_3>;
-				cooling-device = <&cpu0 2 3>;
+				cooling-device = <&cpu0 2 3>, <&cpu1 2 3>,
+						 <&cpu2 2 3>, <&cpu3 2 3>;
 			};
 			map2 {
 				/* Set maximum frequency as 1000MHz  */
 				trip = <&apollo_alert_4>;
-				cooling-device = <&cpu0 3 4>;
+				cooling-device = <&cpu0 3 4>, <&cpu1 3 4>,
+						 <&cpu2 3 4>, <&cpu3 3 4>;
 			};
 			map3 {
 				/* Set maximum frequency as 900MHz  */
 				trip = <&apollo_alert_5>;
-				cooling-device = <&cpu0 4 5>;
+				cooling-device = <&cpu0 4 5>, <&cpu1 4 5>,
+						 <&cpu2 4 5>, <&cpu3 4 5>;
 			};
 			map4 {
 				/* Set maximum frequency as 800MHz  */
 				trip = <&apollo_alert_6>;
-				cooling-device = <&cpu0 5 9>;
+				cooling-device = <&cpu0 5 9>, <&cpu1 5 9>,
+						 <&cpu2 5 9>, <&cpu3 5 9>;
 			};
 		};
 	};