arm64: dts: berlin4ct: support cpuidle-dt

This patch adds an idle-states node to describe the berlin4ct idle
states and also adds references to the idle-states node in all CPU
nodes. After this patch cpuidle is enabled.

Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>

diff --git a/arch/arm64/boot/dts/marvell/berlin4ct.dtsi b/arch/arm64/boot/dts/marvell/berlin4ct.dtsi
index 6cd77272ab8892b1d8278822441543e887a76ac4..099ad93bb49b9c4bfa5d644df1240e01f1bf8734 100644 (file)
--- a/arch/arm64/boot/dts/marvell/berlin4ct.dtsi
+++ b/arch/arm64/boot/dts/marvell/berlin4ct.dtsi
@@ -68,6 +68,7 @@
                        device_type = "cpu";
                        reg = <0x0>;
                        enable-method = "psci";
+                       cpu-idle-states = <&CPU_SLEEP_0>;
                };
 
                cpu1: cpu@1 {
@@ -75,6 +76,7 @@
                        device_type = "cpu";
                        reg = <0x1>;
                        enable-method = "psci";
+                       cpu-idle-states = <&CPU_SLEEP_0>;
                };
 
                cpu2: cpu@2 {
@@ -82,6 +84,7 @@
                        device_type = "cpu";
                        reg = <0x2>;
                        enable-method = "psci";
+                       cpu-idle-states = <&CPU_SLEEP_0>;
                };
 
                cpu3: cpu@3 {
@@ -89,6 +92,19 @@
                        device_type = "cpu";
                        reg = <0x3>;
                        enable-method = "psci";
+                       cpu-idle-states = <&CPU_SLEEP_0>;
+               };
+
+               idle-states {
+                       entry-method = "psci";
+                       CPU_SLEEP_0: cpu-sleep-0 {
+                               compatible = "arm,idle-state";
+                               local-timer-stop;
+                               arm,psci-suspend-param = <0x0010000>;
+                               entry-latency-us = <75>;
+                               exit-latency-us = <155>;
+                               min-residency-us = <1000>;
+                       };
                };
        };