arm64: tegra: Add CPU idle states properties for Tegra210

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@nvidia.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>

diff --git a/arch/arm64/boot/dts/nvidia/tegra210.dtsi b/arch/arm64/boot/dts/nvidia/tegra210.dtsi
index abbb686bd8ba257a5ebf7e551a37c2811b7becb6..79cedd36ffad972fcc33c06af3f2a6fc10308ca8 100644 (file)
--- 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";
+                       };
                };
        };