Commit 0ead1f3e authored by Ulf Hansson's avatar Ulf Hansson Committed by Sudeep Holla
Browse files

dt-bindings: power: Clarify performance capabilities of power-domains 



The power-domains bindings has in many years been used to describe so
called performance-domains too. Rather than using a separate binding it has
been convenient to re-use the power-domain bindings, as in some cases it's
in fact a combination of the both that would be the best description.

Therefore, let's make it more clear that the power-domains bindings can be
used to describe a performance-domain too.

Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Kevin Hilman <khilman@kernel.org>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>
Cc: Conor Dooley <conor+dt@kernel.org>
Cc: devicetree@vger.kernel.org
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230825112633.236607-11-ulf.hansson@linaro.org


Signed-off-by: default avatarSudeep Holla <sudeep.holla@arm.com>
parent e11c480b

Documentation/devicetree/bindings/power/power-domain.yaml

+9 −8
Original line number Diff line number Diff line
@@ -13,8 +13,9 @@ maintainers: 


description: |+

  System on chip designs are often divided into multiple PM domains that can be

  used for power gating of selected IP blocks for power saving by reduced leakage

  current.

  used for power gating of selected IP blocks for power saving by reduced

  leakage current. Moreover, in some cases the similar PM domains may also be

  capable of scaling performance for a group of IP blocks.



  This device tree binding can be used to bind PM domain consumer devices with

  their PM domains provided by PM domain providers. A PM domain provider can be
@@ -25,7 +26,7 @@ description: |+ 


properties:

  $nodename:

    pattern: "^(power-controller|power-domain)([@-].*)?$"

    pattern: "^(power-controller|power-domain|performance-domain)([@-].*)?$"



  domain-idle-states:

    $ref: /schemas/types.yaml#/definitions/phandle-array
@@ -44,11 +45,11 @@ properties: 


  operating-points-v2:

    description:

      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-v2-base.yaml

      for more information.

      Phandles to the OPP tables of power domains that are capable of scaling

      performance, 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-v2-base.yaml for more information.



  "#power-domain-cells":

    description: