[PATCH v2 02/14] dt/bindings: update binding for PM domain idle states
From: Lina Iyer <hidden>
Date: 2016-07-29 21:56:13
Also in:
linux-arm-msm, linux-devicetree, linux-pm
Subsystem:
generic pm domains, open firmware and flattened device tree bindings, the rest · Maintainers:
Ulf Hansson, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
From: Axel Haslam <redacted> Update DT bindings to describe idle states of PM domains. Cc: <redacted> Signed-off-by: Marc Titinger <redacted> Signed-off-by: Lina Iyer <redacted> [Lina: Added state properties, removed state names, wakeup-latency, added of_pm_genpd_init() API, pruned commit text] Signed-off-by: Ulf Hansson <redacted> [Ulf: Moved around code to make it compile properly, rebased on top of multiple state support] --- .../devicetree/bindings/power/power_domain.txt | 39 ++++++++++++++++++++++ 1 file changed, 39 insertions(+)
diff --git a/Documentation/devicetree/bindings/power/power_domain.txt b/Documentation/devicetree/bindings/power/power_domain.txt
index 025b5e7..69aa4e2 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 at 12340000 {
@@ -55,6 +59,39 @@ Example 2: #power-domain-cells = <1>; }; +Example 3: + + pm-domains { + a57_pd: a57_pd@ { + /* will have a57 platform ARM_PD_METHOD_OF_DECLARE*/ + compatible = "arm,pd","arm,cortex-a57"; + #power-domain-cells = <0>; + idle-states = <&CLUSTER_SLEEP_0>; + }; + + a53_pd: a53_pd@ { + /* will have a a53 platform ARM_PD_METHOD_OF_DECLARE*/ + compatible = "arm,pd","arm,cortex-a53"; + #power-domain-cells = <0>; + idle-states = <&CLUSTER_SLEEP_0>, <&CLUSTER_SLEEP_1>; + }; + + CLUSTER_SLEEP_0: idle-state at 0 { + compatible = "arm,idle-state"; + entry-latency-us = <1000>; + exit-latency-us = <2000>; + residency-us = <10000>; + }; + + CLUSTER_SLEEP_1: idle-state at 1 { + compatible = "arm,idle-state"; + entry-latency-us = <5000>; + exit-latency-us = <5000>; + residency-us = <100000>; + }; + }; + + 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.
@@ -76,3 +113,5 @@ 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