[PATCH] arm64: dts: exynos7: add support for cpuidle core power down
From: Chander Kashyap <hidden>
Date: 2014-10-15 06:35:42
Also in:
linux-arm-kernel, linux-samsung-soc, lkml
Subsystem:
arm/samsung s3c, s5p and exynos arm architectures, the rest · Maintainers:
Krzysztof Kozlowski, Peter Griffin, Linus Torvalds
Exynos7 has core power down state where cores can be powered off independently. This patch adds support for this state. Signed-off-by: Chander Kashyap <redacted> --- This patch has following dependencies: - [PATCH v5 0/8] arch: arm64: Enable support for Samsung Exynos7 SoC http://www.spinics.net/lists/linux-samsung-soc/msg37047.html - [PATCH v9 0/8] ARM generic idle states http://permalink.gmane.org/gmane.linux.power-management.general/49224 arch/arm64/boot/dts/exynos/exynos7.dtsi | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+)
diff --git a/arch/arm64/boot/dts/exynos/exynos7.dtsi b/arch/arm64/boot/dts/exynos/exynos7.dtsi
index ce221ac..8e0a034 100644
--- a/arch/arm64/boot/dts/exynos/exynos7.dtsi
+++ b/arch/arm64/boot/dts/exynos/exynos7.dtsi@@ -36,6 +36,7 @@ device_type = "cpu"; compatible = "arm,cortex-a57", "arm,armv8"; enable-method = "psci"; + cpu-idle-states = <&CPU_SLEEP>; reg = <0x0>; };
@@ -43,6 +44,7 @@ device_type = "cpu"; compatible = "arm,cortex-a57", "arm,armv8"; enable-method = "psci"; + cpu-idle-states = <&CPU_SLEEP>; reg = <0x1>; };
@@ -50,6 +52,7 @@ device_type = "cpu"; compatible = "arm,cortex-a57", "arm,armv8"; enable-method = "psci"; + cpu-idle-states = <&CPU_SLEEP>; reg = <0x2>; };
@@ -57,8 +60,23 @@ device_type = "cpu"; compatible = "arm,cortex-a57", "arm,armv8"; enable-method = "psci"; + cpu-idle-states = <&CPU_SLEEP>; reg = <0x3>; }; + + idle-states { + entry-method = "arm,psci"; + + CPU_SLEEP: cpu-sleep { + compatible = "arm,idle-state"; + local-timer-stop; + arm,psci-suspend-param = <0x0010000>; + entry-latency-us = <20>; + exit-latency-us = <150>; + min-residency-us = <2100>; + status = "enabled"; + }; + }; }; psci {
--
1.7.9.5