From mboxrd@z Thu Jan 1 00:00:00 1970 From: lina.iyer@linaro.org (Lina Iyer) Date: Fri, 29 Jul 2016 15:56:13 -0600 Subject: [PATCH v2 02/14] dt/bindings: update binding for PM domain idle states In-Reply-To: <1469829385-11511-1-git-send-email-lina.iyer@linaro.org> References: <1469829385-11511-1-git-send-email-lina.iyer@linaro.org> Message-ID: <1469829385-11511-3-git-send-email-lina.iyer@linaro.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org From: Axel Haslam Update DT bindings to describe idle states of PM domains. Cc: Signed-off-by: Marc Titinger Signed-off-by: Lina Iyer [Lina: Added state properties, removed state names, wakeup-latency, added of_pm_genpd_init() API, pruned commit text] Signed-off-by: Ulf Hansson [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