On 21/02/2019 08:21, Joseph Lo wrote:
> 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>
Acked-by: Daniel Lezcano <daniel.lezcano@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";
> + };
> };
> };
>
>
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