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Merge branch 'opp/linux-next' of https://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm

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Pull Operating Performance Points (OPP) framework updates for v4.16
from Viresh Kumar.

* 'opp/linux-next' of https://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm:
  OPP: Introduce "required-opp" property
  OPP: Allow OPP table to be used for power-domains
This commit is contained in:
Rafael J. Wysocki 2018-01-05 12:57:19 +01:00
commit b68bf11ebb
2 changed files with 78 additions and 0 deletions
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13
Documentation/devicetree/bindings/opp/opp.txt
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@ -45,6 +45,11 @@ Devices supporting OPPs must set their "operating-points-v2" property with
phandle to a OPP table in their DT node. The OPP core will use this phandle to
find the operating points for the device.
This can contain more than one phandle for power domain providers that provide
multiple power domains. That is, one phandle for each power domain. If only one
phandle is available, then the same OPP table will be used for all power domains
provided by the power domain provider.
If required, this can be extended for SoC vendor specific bindings. Such bindings
should be documented as Documentation/devicetree/bindings/power/<vendor>-opp.txt
and should have a compatible description like: "operating-points-v2-<vendor>".
@ -154,6 +159,14 @@ Optional 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.
/ {

65
Documentation/devicetree/bindings/power/power_domain.txt
View File

@ -40,6 +40,12 @@ Optional properties:
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 of power domains provided by
a power domain provider. If the provider provides a single power domain only
or all the power domains provided by the provider have identical OPP tables,
then this shall contain a single phandle. Refer to ../opp/opp.txt for more
information.
Example:
power: power-controller@12340000 {
@ -120,4 +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>;
};
};
power: 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 = <&power 0>;
required-opp = <&domain0_opp_0>;
};
leaky-device1@12350000 {
compatible = "foo,i-leak-current";
reg = <0x12350000 0x1000>;
power-domains = <&power 1>;
required-opp = <&domain1_opp_1>;
};
[1]. Documentation/devicetree/bindings/power/domain-idle-state.txt