Update the power-domain bindings to allow "operating-points-v2" to be present within the power-domain's provider node.
Also allow consumer devices that don't use OPP tables, to specify the parent power-domain's OPP node in their "power-domain-opp" property.
Also note that the "operating-points-v2" property is extended to support an array for the power domain providers.
Signed-off-by: Viresh Kumar viresh.kumar@linaro.org --- .../devicetree/bindings/power/power_domain.txt | 106 +++++++++++++++++++++ 1 file changed, 106 insertions(+)
diff --git a/Documentation/devicetree/bindings/power/power_domain.txt b/Documentation/devicetree/bindings/power/power_domain.txt index 14bd9e945ff6..730af0afc09a 100644 --- a/Documentation/devicetree/bindings/power/power_domain.txt +++ b/Documentation/devicetree/bindings/power/power_domain.txt @@ -40,6 +40,10 @@ phandle arguments (so called PM domain specifiers) of length specified by the domain's idle states. In the absence of this property, the domain would be considered as capable of being powered-on or powered-off.
+- operating-points-v2 : Phandles to the OPP tables for a power domain provider. + If the provider provides a single power domain, then this shall contain a + single phandle. Refer to ../opp/opp.txt for more information. + Example:
power: power-controller@12340000 { @@ -120,4 +124,106 @@ 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".
+Optional properties: +- power-domain-opp: Phandle to the OPP node of the parent power-domain. The + parent power-domain should be configured to the OPP whose node is pointed by + the phandle, in order to use the device that contains this property. + + +Example: +- Device with parent power domain with two active states represented by OPP + table. + + domain_opp_table: opp_table { + compatible = "operating-points-v2"; + + /* + * NOTE: Actual frequency is managed by firmware and is hidden + * from HLOS, so we simply use index in the opp-hz field to + * select the OPP. + */ + domain_opp_1: opp-1 { + opp-hz = /bits/ 64 <1>; + opp-microvolt = <975000 970000 985000>; + }; + domain_opp_2: opp-2 { + opp-hz = /bits/ 64 <2>; + opp-microvolt = <1075000 1000000 1085000>; + }; + }; + + + parent: power-controller@12340000 { + compatible = "foo,power-controller"; + reg = <0x12340000 0x1000>; + #power-domain-cells = <0>; + operating-points-v2 = <&domain_opp_table>; + }; + + leaky-device@12350000 { + compatible = "foo,i-leak-current"; + reg = <0x12350000 0x1000>; + power-domains = <&parent>; + power-domain-opp = <&domain_opp_2>; + }; + +- OPP table for domain provider that provides two domains. + + domain0_opp_table: opp_table0 { + compatible = "operating-points-v2"; + + /* + * NOTE: Actual frequency is managed by firmware and is hidden + * from HLOS, so we simply use index in the opp-hz field to + * select the OPP. + */ + domain0_opp_1: opp-1 { + opp-hz = /bits/ 64 <1>; + opp-microvolt = <975000 970000 985000>; + }; + domain0_opp_2: opp-2 { + opp-hz = /bits/ 64 <2>; + opp-microvolt = <1075000 1000000 1085000>; + }; + }; + + domain1_opp_table: opp_table1 { + compatible = "operating-points-v2"; + + /* + * NOTE: Actual frequency is managed by firmware and is hidden + * from HLOS, so we simply use index in the opp-hz field to + * select the OPP. + */ + domain1_opp_1: opp-1 { + opp-hz = /bits/ 64 <1>; + opp-microvolt = <975000 970000 985000>; + }; + domain1_opp_2: opp-2 { + opp-hz = /bits/ 64 <2>; + opp-microvolt = <1075000 1000000 1085000>; + }; + }; + + parent: power-controller@12340000 { + compatible = "foo,power-controller"; + reg = <0x12340000 0x1000>; + #power-domain-cells = <1>; + operating-points-v2 = <&domain0_opp_table>, <&domain1_opp_table>; + }; + + leaky-device0@12350000 { + compatible = "foo,i-leak-current"; + reg = <0x12350000 0x1000>; + power-domains = <&parent 0>; + power-domain-opp = <&domain0_opp_2>; + }; + + leaky-device1@12350000 { + compatible = "foo,i-leak-current"; + reg = <0x12350000 0x1000>; + power-domains = <&parent 1>; + power-domain-opp = <&domain1_opp_2>; + }; + [1]. Documentation/devicetree/bindings/power/domain-idle-state.txt