linux-kernel - [PATCH 1/2] arm64: dts: exynos: gs101: Add 'local-timer-stop' to cpuidle nodes

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Message-Id: <20250524-gs101-cpuidle-v1-1-aea77a7842a6@linaro.org>
Date: Sat, 24 May 2025 08:30:29 +0100
From: Peter Griffin <peter.griffin@...aro.org>
To: André Draszik <andre.draszik@...aro.org>, 
 Tudor Ambarus <tudor.ambarus@...aro.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Alim Akhtar <alim.akhtar@...sung.com>, 
 Krzysztof Kozlowski <krzk@...nel.org>
Cc: William Mcvicker <willmcvicker@...gle.com>, 
 Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>, 
 linux-arm-kernel@...ts.infradead.org, linux-samsung-soc@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 kernel-team@...roid.com, Peter Griffin <peter.griffin@...aro.org>, 
 Will Deacon <willdeacon@...gle.com>, 
 Youngmin Nam <youngmin.nam@...sung.com>
Subject: [PATCH 1/2] arm64: dts: exynos: gs101: Add 'local-timer-stop' to
 cpuidle nodes

From: Will Deacon <willdeacon@...gle.com>

In preparation for switching to the architected timer as the primary
clockevents device, mark the cpuidle nodes with the 'local-timer-stop'
property to indicate that an alternative clockevents device must be
used for waking up from the "c2" idle state.

Signed-off-by: Will Deacon <willdeacon@...gle.com>
[Original commit from https://android.googlesource.com/kernel/gs/+/a896fd98638047989513d05556faebd28a62b27c]
Signed-off-by: Will McVicker <willmcvicker@...gle.com>
Reviewed-by: Youngmin Nam <youngmin.nam@...sung.com>
Tested-by: Youngmin Nam <youngmin.nam@...sung.com>
Fixes: ea89fdf24fd9 ("arm64: dts: exynos: google: Add initial Google gs101 SoC support")
Signed-off-by: Peter Griffin <peter.griffin@...aro.org>
---
 arch/arm64/boot/dts/exynos/google/gs101.dtsi | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm64/boot/dts/exynos/google/gs101.dtsi b/arch/arm64/boot/dts/exynos/google/gs101.dtsi
index 48c691fd0a3ae430b5d66b402610d23b72b144d7..94aa0ffb9a9760c58818c0417001fd187b048ea8 100644
--- a/arch/arm64/boot/dts/exynos/google/gs101.dtsi
+++ b/arch/arm64/boot/dts/exynos/google/gs101.dtsi
@@ -155,6 +155,7 @@ ananke_cpu_sleep: cpu-ananke-sleep {
 				idle-state-name = "c2";
 				compatible = "arm,idle-state";
 				arm,psci-suspend-param = <0x0010000>;
+				local-timer-stop;
 				entry-latency-us = <70>;
 				exit-latency-us = <160>;
 				min-residency-us = <2000>;
@@ -164,6 +165,7 @@ enyo_cpu_sleep: cpu-enyo-sleep {
 				idle-state-name = "c2";
 				compatible = "arm,idle-state";
 				arm,psci-suspend-param = <0x0010000>;
+				local-timer-stop;
 				entry-latency-us = <150>;
 				exit-latency-us = <190>;
 				min-residency-us = <2500>;
@@ -173,6 +175,7 @@ hera_cpu_sleep: cpu-hera-sleep {
 				idle-state-name = "c2";
 				compatible = "arm,idle-state";
 				arm,psci-suspend-param = <0x0010000>;
+				local-timer-stop;
 				entry-latency-us = <235>;
 				exit-latency-us = <220>;
 				min-residency-us = <3500>;

-- 
2.49.0.1151.ga128411c76-goog