Update DT bindings to describe idle states of PM domains.
This patch is based on the original patch by Marc Titinger.
Cc: <devicetree@xxxxxxxxxxxxxxx>
Signed-off-by: Marc Titinger <mtitinger+renesas@xxxxxxxxxxxx>
Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
Signed-off-by: Lina Iyer <lina.iyer@xxxxxxxxxx>
Acked-by: Rob Herring <robh@xxxxxxxxxx>
---
.../devicetree/bindings/power/power_domain.txt | 38 ++++++++++++++++++++++
1 file changed, 38 insertions(+)
diff --git a/Documentation/devicetree/bindings/power/power_domain.txt b/Documentation/devicetree/bindings/power/power_domain.txt
index 025b5e7..7f8f27e 100644
--- a/Documentation/devicetree/bindings/power/power_domain.txt
+++ b/Documentation/devicetree/bindings/power/power_domain.txt
@@ -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 +63,38 @@ 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:
+ parent: power-controller@12340000 {
+ compatible = "foo,power-controller";
+ reg = <0x12340000 0x1000>;
+ #power-domain-cells = <0>;
+ domain-idle-states = <&DOMAIN_RET>, <&DOMAIN_PWR_DN>;
+ };
+
+ child: power-controller@12341000 {
+ compatible = "foo,power-controller";
+ reg = <0x12341000 0x1000>;
+ power-domains = <&parent 0>;
+ #power-domain-cells = <0>;
+ domain-idle-states = <&DOMAIN_PWR_DN>;
+ };
+
+ DOMAIN_RET: state@0 {
+ compatible = "arm,idle-state";
+ reg = <0x0>;
+ entry-latency-us = <1000>;
+ exit-latency-us = <2000>;
+ min-residency-us = <10000>;
+ };
+
+ DOMAIN_PWR_DN: state@1 {
+ compatible = "arm,idle-state";
+ reg = <0x1>;
+ entry-latency-us = <5000>;
+ exit-latency-us = <8000>;
+ min-residency-us = <7000>;
+ };
+
==PM domain consumers==
Required properties:
@@ -76,3 +112,5 @@ 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
--
2.7.4
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