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 <k.chan...@samsung.com>
---
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
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
