Add idle states properties for generic ARM CPU idle driver. This
includes a cpu-sleep state which is the power down state of CPU cores.
Signed-off-by: Joseph Lo <josephl@xxxxxxxxxx>
Acked-by: Jon Hunter <jonathanh@xxxxxxxxxx>
---
v7:
* s/C7/CPU_SLEEP/ & s/c7/cpu-sleep/
* update the timing of 'entry/exit-latency-us'
v6:
* add ack tag from Jon.
v5:
* no change
v4:
* no change
v3:
* no change
v2:
* add entry-latency-us and exit-latency-us properties
---
arch/arm64/boot/dts/nvidia/tegra210.dtsi | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/arch/arm64/boot/dts/nvidia/tegra210.dtsi b/arch/arm64/boot/dts/nvidia/tegra210.dtsi
index abbb686bd8ba..79cedd36ffad 100644
--- a/arch/arm64/boot/dts/nvidia/tegra210.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra210.dtsi
@@ -1371,24 +1371,43 @@
<&dfll>;
clock-names = "cpu_g", "pll_x", "pll_p", "dfll";
clock-latency = <300000>;
+ cpu-idle-states = <&CPU_SLEEP>;
};
cpu@1 {
device_type = "cpu";
compatible = "arm,cortex-a57";
reg = <1>;
+ cpu-idle-states = <&CPU_SLEEP>;
};
cpu@2 {
device_type = "cpu";
compatible = "arm,cortex-a57";
reg = <2>;
+ cpu-idle-states = <&CPU_SLEEP>;
};
cpu@3 {
device_type = "cpu";
compatible = "arm,cortex-a57";
reg = <3>;
+ cpu-idle-states = <&CPU_SLEEP>;
+ };
+
+ idle-states {
+ entry-method = "psci";
+
+ CPU_SLEEP: cpu-sleep {
+ compatible = "arm,idle-state";
+ arm,psci-suspend-param = <0x40000007>;
+ entry-latency-us = <100>;
+ exit-latency-us = <30>;
+ min-residency-us = <1000>;
+ wakeup-latency-us = <130>;
+ idle-state-name = "cpu-sleep";
+ status = "disabled";
+ };
};
};
--
2.20.1
