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UPSTREAM: 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>

Bug: 323966425
Change-Id: I46cc27dec351160f20a76d29d419ba8e0f161c1b
(cherry picked from commit 0ead1f3e158c44aa274f2d5c49be947fbfcdffe0)
Signed-off-by: Nikunj Kela <quic_nkela@quicinc.com>
Signed-off-by: Anant Goel <quic_anantg@quicinc.com>
This commit is contained in:
Ulf Hansson
2023-08-25 13:26:30 +02:00
committed by Anant Goel
parent dda942f010
commit 9c1597d2e4
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: |+ description: |+
System on chip designs are often divided into multiple PM domains that can be 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 used for power gating of selected IP blocks for power saving by reduced
current. 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 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 their PM domains provided by PM domain providers. A PM domain provider can be
@@ -25,7 +26,7 @@ description: |+
properties: properties:
$nodename: $nodename:
pattern: "^(power-controller|power-domain)([@-].*)?$" pattern: "^(power-controller|power-domain|performance-domain)([@-].*)?$"
domain-idle-states: domain-idle-states:
$ref: /schemas/types.yaml#/definitions/phandle-array $ref: /schemas/types.yaml#/definitions/phandle-array
@@ -47,11 +48,11 @@ properties:
items: items:
maxItems: 1 maxItems: 1
description: description:
Phandles to the OPP tables of power domains provided by a power domain Phandles to the OPP tables of power domains that are capable of scaling
provider. If the provider provides a single power domain only or all performance, provided by a power domain provider. If the provider provides
the power domains provided by the provider have identical OPP tables, a single power domain only or all the power domains provided by the
then this shall contain a single phandle. Refer to ../opp/opp-v2-base.yaml provider have identical OPP tables, then this shall contain a single
for more information. phandle. Refer to ../opp/opp-v2-base.yaml for more information.
"#power-domain-cells": "#power-domain-cells":
description: description: