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| author |   Lina Iyer <lina.iyer@linaro.org> | 2016-10-14 10:47:53 -0700 |
|---|---|---|
| committer |   Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-10-21 22:20:36 +0200 |
| commit | 70bb510e42797792d9fc4842f01fa2fb685717b6 (patch) | |
| tree | ecfd9280aaaf56fac840fca56d85096cb8d668e6 /Documentation/devicetree/bindings/power/power_domain.txt | |
| parent | PM / Domains: Save the fwnode in genpd_power_state (diff) | |
| download | linux-dev-70bb510e42797792d9fc4842f01fa2fb685717b6.tar.xz linux-dev-70bb510e42797792d9fc4842f01fa2fb685717b6.zip | |
dt/bindings / PM/Domains: Update binding for PM domain idle states
Update DT bindings to describe idle states of PM domains.
This patch is based on the original patch by Marc Titinger.
Signed-off-by: Marc Titinger <mtitinger+renesas@baylibre.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Lina Iyer <lina.iyer@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'Documentation/devicetree/bindings/power/power_domain.txt')
| -rw-r--r-- | Documentation/devicetree/bindings/power/power_domain.txt | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/power/power_domain.txt b/Documentation/devicetree/bindings/power/power_domain.txt index 025b5e7df61c..e1650364b296 100644 --- a/Documentation/devicetree/bindings/power/power_domain.txt +++ b/Documentation/devicetree/bindings/power/power_domain.txt @@ -29,6 +29,15 @@ 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]. + The domain-idle-state property reflects the idle state of this PM domain and + not the idle states of the devices or sub-domains in the PM domain. Devices + and sub-domains have their own idle-states independent of the parent + domain's idle states. In the absence of this property, the domain would be + considered as capable of being powered-on or powered-off. + Example: power: power-controller@12340000 { @@ -59,6 +68,38 @@ 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 +117,5 @@ 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 |