arm64: dts: qcom: msm8998: Add PSCI cpuidle low power states

Add device bindings for cpuidle states for cpu devices.

[marc: rebase, fix arm,psci-suspend-param, fix entry-latency-us]
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org>
Signed-off-by: Marc Gonzalez <marc.w.gonzalez@free.fr>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

diff --git a/arch/arm64/boot/dts/qcom/msm8998.dtsi b/arch/arm64/boot/dts/qcom/msm8998.dtsi
index 3a05126..1814ec1 100644 (file)
--- a/arch/arm64/boot/dts/qcom/msm8998.dtsi
+++ b/arch/arm64/boot/dts/qcom/msm8998.dtsi
@@ -79,6 +79,7 @@
                        compatible = "arm,armv8";
                        reg = <0x0 0x0>;
                        enable-method = "psci";
+                       cpu-idle-states = <&LITTLE_CPU_SLEEP_0 &LITTLE_CPU_SLEEP_1>;
                        next-level-cache = <&L2_0>;
                        L2_0: l2-cache {
                                compatible = "arm,arch-cache";
@@ -97,6 +98,7 @@
                        compatible = "arm,armv8";
                        reg = <0x0 0x1>;
                        enable-method = "psci";
+                       cpu-idle-states = <&LITTLE_CPU_SLEEP_0 &LITTLE_CPU_SLEEP_1>;
                        next-level-cache = <&L2_0>;
                        L1_I_1: l1-icache {
                                compatible = "arm,arch-cache";
@@ -111,6 +113,7 @@
                        compatible = "arm,armv8";
                        reg = <0x0 0x2>;
                        enable-method = "psci";
+                       cpu-idle-states = <&LITTLE_CPU_SLEEP_0 &LITTLE_CPU_SLEEP_1>;
                        next-level-cache = <&L2_0>;
                        L1_I_2: l1-icache {
                                compatible = "arm,arch-cache";
@@ -125,6 +128,7 @@
                        compatible = "arm,armv8";
                        reg = <0x0 0x3>;
                        enable-method = "psci";
+                       cpu-idle-states = <&LITTLE_CPU_SLEEP_0 &LITTLE_CPU_SLEEP_1>;
                        next-level-cache = <&L2_0>;
                        L1_I_3: l1-icache {
                                compatible = "arm,arch-cache";
@@ -139,6 +143,7 @@
                        compatible = "arm,armv8";
                        reg = <0x0 0x100>;
                        enable-method = "psci";
+                       cpu-idle-states = <&BIG_CPU_SLEEP_0 &BIG_CPU_SLEEP_1>;
                        next-level-cache = <&L2_1>;
                        L2_1: l2-cache {
                                compatible = "arm,arch-cache";
@@ -157,6 +162,7 @@
                        compatible = "arm,armv8";
                        reg = <0x0 0x101>;
                        enable-method = "psci";
+                       cpu-idle-states = <&BIG_CPU_SLEEP_0 &BIG_CPU_SLEEP_1>;
                        next-level-cache = <&L2_1>;
                        L1_I_101: l1-icache {
                                compatible = "arm,arch-cache";
@@ -171,6 +177,7 @@
                        compatible = "arm,armv8";
                        reg = <0x0 0x102>;
                        enable-method = "psci";
+                       cpu-idle-states = <&BIG_CPU_SLEEP_0 &BIG_CPU_SLEEP_1>;
                        next-level-cache = <&L2_1>;
                        L1_I_102: l1-icache {
                                compatible = "arm,arch-cache";
@@ -185,6 +192,7 @@
                        compatible = "arm,armv8";
                        reg = <0x0 0x103>;
                        enable-method = "psci";
+                       cpu-idle-states = <&BIG_CPU_SLEEP_0 &BIG_CPU_SLEEP_1>;
                        next-level-cache = <&L2_1>;
                        L1_I_103: l1-icache {
                                compatible = "arm,arch-cache";
@@ -231,6 +239,48 @@
                                };
                        };
                };
+
+               idle-states {
+                       entry-method = "psci";
+
+                       LITTLE_CPU_SLEEP_0: cpu-sleep-0-0 {
+                               compatible = "arm,idle-state";
+                               idle-state-name = "little-retention";
+                               arm,psci-suspend-param = <0x00000002>;
+                               entry-latency-us = <81>;
+                               exit-latency-us = <86>;
+                               min-residency-us = <200>;
+                       };
+
+                       LITTLE_CPU_SLEEP_1: cpu-sleep-0-1 {
+                               compatible = "arm,idle-state";
+                               idle-state-name = "little-power-collapse";
+                               arm,psci-suspend-param = <0x40000003>;
+                               entry-latency-us = <273>;
+                               exit-latency-us = <612>;
+                               min-residency-us = <1000>;
+                               local-timer-stop;
+                       };
+
+                       BIG_CPU_SLEEP_0: cpu-sleep-1-0 {
+                               compatible = "arm,idle-state";
+                               idle-state-name = "big-retention";
+                               arm,psci-suspend-param = <0x00000002>;
+                               entry-latency-us = <79>;
+                               exit-latency-us = <82>;
+                               min-residency-us = <200>;
+                       };
+
+                       BIG_CPU_SLEEP_1: cpu-sleep-1-1 {
+                               compatible = "arm,idle-state";
+                               idle-state-name = "big-power-collapse";
+                               arm,psci-suspend-param = <0x40000003>;
+                               entry-latency-us = <336>;
+                               exit-latency-us = <525>;
+                               min-residency-us = <1000>;
+                               local-timer-stop;
+                       };
+               };
        };
 
        firmware {