@@ -29,6 +29,10 @@ Optional properties:
specified by this binding. More details about power domain specifier are
available in the next section.
+- domain-idle-states : A phandle of an idle-state that shall be soaked into a
+ generic domain power state. The idle state definitions are
+ compatible with arm,idle-state specified in [1].
+
Example:
power: power-controller@12340000 {
@@ -59,6 +63,57 @@ The nodes above define two power controllers: 'parent' and 'child'.
Domains created by the 'child' power controller are subdomains of '0' power
domain provided by the 'parent' power controller.
+Example 3: ARM v7 style CPU PM domains (Linux domain controller)
+
+ cpus {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ CPU0: cpu@0 {
+ device_type = "cpu";
+ compatible = "arm,cortex-a7", "arm,armv7";
+ reg = <0x0>;
+ power-domains = <&a7_pd>;
+ };
+
+ CPU1: cpu@1 {
+ device_type = "cpu";
+ compatible = "arm,cortex-a15", "arm,armv7";
+ reg = <0x0>;
+ power-domains = <&a15_pd>;
+ };
+ };
+
+ pm-domains {
+ a15_pd: a15_pd {
+ /* will have A15 platform ARM_PD_METHOD_OF_DECLARE*/
+ compatible = "arm,cortex-a15";
+ #power-domain-cells = <0>;
+ domain-idle-states = <&CLUSTER_SLEEP_0>;
+ };
+
+ a7_pd: a7_pd {
+ /* will have a A7 platform ARM_PD_METHOD_OF_DECLARE*/
+ compatible = "arm,cortex-a7";
+ #power-domain-cells = <0>;
+ domain-idle-states = <&CLUSTER_SLEEP_0>, <&CLUSTER_SLEEP_1>;
+ };
+
+ CLUSTER_SLEEP_0: state0 {
+ compatible = "arm,idle-state";
+ entry-latency-us = <1000>;
+ exit-latency-us = <2000>;
+ min-residency-us = <10000>;
+ };
+
+ CLUSTER_SLEEP_1: state1 {
+ compatible = "arm,idle-state";
+ entry-latency-us = <5000>;
+ exit-latency-us = <5000>;
+ min-residency-us = <100000>;
+ };
+ };
+
==PM domain consumers==
Required properties:
@@ -76,3 +131,5 @@ Example:
The node above defines a typical PM domain consumer device, which is located
inside a PM domain with index 0 of a power controller represented by a node
with the label "power".
+
+[1]. Documentation/devicetree/bindings/arm/idle-states.txt