| Message ID | 6615035f294a64a4c17e5b44ac6690d1c2ac127c.1513591822.git.viresh.kumar@linaro.org |
|---|---|
| State | Accepted |
| Commit | e856f078bcf120e1627c750014d2612974ed81a2 |
| Headers | show |
| Series | OPP: Allow OPP table to be used for power-domains | expand |
On Mon, Dec 18, 2017 at 03:51:29PM +0530, Viresh Kumar wrote: > Devices have inter-dependencies some times. For example a device that > needs to run at 800 MHz, needs another device (e.g. Its power domain) to > be configured at a particular operating performance point. > > This patch introduces a new property "required-opp" which can be present > directly in a device's node (if it doesn't need to change its OPPs), or > in device's OPP nodes. More details on the property can be seen in the > binding itself. > > Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> > --- > Documentation/devicetree/bindings/opp/opp.txt | 8 +++ > .../devicetree/bindings/power/power_domain.txt | 59 ++++++++++++++++++++++ > 2 files changed, 67 insertions(+) A couple of nits, otherwise: Reviewed-by: Rob Herring <robh@kernel.org> > > diff --git a/Documentation/devicetree/bindings/opp/opp.txt b/Documentation/devicetree/bindings/opp/opp.txt > index a3953a1bb1a1..4e4f30288c8b 100644 > --- a/Documentation/devicetree/bindings/opp/opp.txt > +++ b/Documentation/devicetree/bindings/opp/opp.txt > @@ -159,6 +159,14 @@ properties. > > - status: Marks the node enabled/disabled. > > +- required-opp: This contains phandle to an OPP node in another device's OPP > + table. It may contain an array of phandles, where each phandle points to an > + OPP of a different device. It should not contain multiple phandles to the OPP > + nodes in the same OPP table. This specifies the minimum required OPP of the > + device(s), whose OPP's phandle is present in this property, for the > + functioning of the current device at the current OPP (where this property is > + present). > + > Example 1: Single cluster Dual-core ARM cortex A9, switch DVFS states together. > > / { > diff --git a/Documentation/devicetree/bindings/power/power_domain.txt b/Documentation/devicetree/bindings/power/power_domain.txt > index 61549840ab3b..f824763b202e 100644 > --- a/Documentation/devicetree/bindings/power/power_domain.txt > +++ b/Documentation/devicetree/bindings/power/power_domain.txt > @@ -126,4 +126,63 @@ 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: > +- required-opp: This contains phandle to an OPP node in another device's OPP > + table. It may contain an array of phandles, where each phandle points to an > + OPP of a different device. It should not contain multiple phandles to the OPP > + nodes in the same OPP table. This specifies the minimum required OPP of the > + device(s), whose OPP's phandle is present in this property, for the > + functioning of the current device at the current OPP (where this property is > + present). > + > +Example: > +- OPP table for domain provider that provides two domains. > + > + domain0_opp_table: opp_table0 { opp-table0 > + compatible = "operating-points-v2"; > + > + domain0_opp_0: opp-1000000000 { > + opp-hz = /bits/ 64 <1000000000>; > + opp-microvolt = <975000 970000 985000>; > + }; > + domain0_opp_1: opp-1100000000 { > + opp-hz = /bits/ 64 <1100000000>; > + opp-microvolt = <1000000 980000 1010000>; > + }; > + }; > + > + domain1_opp_table: opp_table1 { opp-table1 > + compatible = "operating-points-v2"; > + > + domain1_opp_0: opp-1200000000 { > + opp-hz = /bits/ 64 <1200000000>; > + opp-microvolt = <975000 970000 985000>; > + }; > + domain1_opp_1: opp-1300000000 { > + opp-hz = /bits/ 64 <1300000000>; > + opp-microvolt = <1000000 980000 1010000>; > + }; > + }; > + > + 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>; > + required-opp = <&domain0_opp_0>; > + }; > + > + leaky-device1@12350000 { > + compatible = "foo,i-leak-current"; > + reg = <0x12350000 0x1000>; > + power-domains = <&parent 1>; > + required-opp = <&domain1_opp_1>; > + }; > + > [1]. Documentation/devicetree/bindings/power/domain-idle-state.txt > -- > 2.15.0.194.g9af6a3dea062 > -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/Documentation/devicetree/bindings/opp/opp.txt b/Documentation/devicetree/bindings/opp/opp.txt index a3953a1bb1a1..4e4f30288c8b 100644 --- a/Documentation/devicetree/bindings/opp/opp.txt +++ b/Documentation/devicetree/bindings/opp/opp.txt @@ -159,6 +159,14 @@ properties. - status: Marks the node enabled/disabled. +- required-opp: This contains phandle to an OPP node in another device's OPP + table. It may contain an array of phandles, where each phandle points to an + OPP of a different device. It should not contain multiple phandles to the OPP + nodes in the same OPP table. This specifies the minimum required OPP of the + device(s), whose OPP's phandle is present in this property, for the + functioning of the current device at the current OPP (where this property is + present). + Example 1: Single cluster Dual-core ARM cortex A9, switch DVFS states together. / { diff --git a/Documentation/devicetree/bindings/power/power_domain.txt b/Documentation/devicetree/bindings/power/power_domain.txt index 61549840ab3b..f824763b202e 100644 --- a/Documentation/devicetree/bindings/power/power_domain.txt +++ b/Documentation/devicetree/bindings/power/power_domain.txt @@ -126,4 +126,63 @@ 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: +- required-opp: This contains phandle to an OPP node in another device's OPP + table. It may contain an array of phandles, where each phandle points to an + OPP of a different device. It should not contain multiple phandles to the OPP + nodes in the same OPP table. This specifies the minimum required OPP of the + device(s), whose OPP's phandle is present in this property, for the + functioning of the current device at the current OPP (where this property is + present). + +Example: +- OPP table for domain provider that provides two domains. + + domain0_opp_table: opp_table0 { + compatible = "operating-points-v2"; + + domain0_opp_0: opp-1000000000 { + opp-hz = /bits/ 64 <1000000000>; + opp-microvolt = <975000 970000 985000>; + }; + domain0_opp_1: opp-1100000000 { + opp-hz = /bits/ 64 <1100000000>; + opp-microvolt = <1000000 980000 1010000>; + }; + }; + + domain1_opp_table: opp_table1 { + compatible = "operating-points-v2"; + + domain1_opp_0: opp-1200000000 { + opp-hz = /bits/ 64 <1200000000>; + opp-microvolt = <975000 970000 985000>; + }; + domain1_opp_1: opp-1300000000 { + opp-hz = /bits/ 64 <1300000000>; + opp-microvolt = <1000000 980000 1010000>; + }; + }; + + 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>; + required-opp = <&domain0_opp_0>; + }; + + leaky-device1@12350000 { + compatible = "foo,i-leak-current"; + reg = <0x12350000 0x1000>; + power-domains = <&parent 1>; + required-opp = <&domain1_opp_1>; + }; + [1]. Documentation/devicetree/bindings/power/domain-idle-state.txt
Devices have inter-dependencies some times. For example a device that needs to run at 800 MHz, needs another device (e.g. Its power domain) to be configured at a particular operating performance point. This patch introduces a new property "required-opp" which can be present directly in a device's node (if it doesn't need to change its OPPs), or in device's OPP nodes. More details on the property can be seen in the binding itself. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> --- Documentation/devicetree/bindings/opp/opp.txt | 8 +++ .../devicetree/bindings/power/power_domain.txt | 59 ++++++++++++++++++++++ 2 files changed, 67 insertions(+) -- 2.15.0.194.g9af6a3dea062 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html