[PATCH v5 02/16] dt/bindings: Update binding for PM domain idle states
From: Lina Iyer <hidden>
Date: 2016-08-26 20:17:44
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 | 57 ++++++++++++++++++++++ 1 file changed, 57 insertions(+)
diff --git a/Documentation/devicetree/bindings/power/power_domain.txt b/Documentation/devicetree/bindings/power/power_domain.txt
index 025b5e7..4960486 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 {
@@ -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 at 0 { + device_type = "cpu"; + compatible = "arm,cortex-a7", "arm,armv7"; + reg = <0x0>; + power-domains = <&a7_pd>; + }; + + CPU1: cpu at 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
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2.7.4