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

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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: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230825112633.236607-11-ulf.hansson@linaro.org
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
This commit is contained in:
Ulf Hansson
2023-08-25 13:26:30 +02:00
committed by Sudeep Holla
parent e11c480b6d
commit 0ead1f3e15
1 changed files with 9 additions and 8 deletions
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17
Documentation/devicetree/bindings/power/power-domain.yaml
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@@ -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: