diff mbox series

[v3,10/13] dt-bindings: power: Clarify performance capabilities of power-domains

Message ID 20230825112633.236607-11-ulf.hansson@linaro.org (mailing list archive)
State New, archived
Delegated to: viresh kumar
Headers show
Series arm_scmi/cpufreq: Add generic performance scaling support | expand

Commit Message

Ulf Hansson Aug. 25, 2023, 11:26 a.m. UTC 
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>
---

Changes in v3:
	- New patch.

---
 .../devicetree/bindings/power/power-domain.yaml | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

Comments

Rob Herring (Arm) Sept. 11, 2023, 2:40 p.m. UTC | #1 
On Fri, 25 Aug 2023 13:26:30 +0200, Ulf Hansson wrote:
> 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>
> ---
> 
> Changes in v3:
> 	- New patch.
> 
> ---
>  .../devicetree/bindings/power/power-domain.yaml | 17 +++++++++--------
>  1 file changed, 9 insertions(+), 8 deletions(-)
> 

Reviewed-by: Rob Herring <robh@kernel.org>
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/power/power-domain.yaml b/Documentation/devicetree/bindings/power/power-domain.yaml
index d1235e562041..8fdb529d560b 100644
--- a/Documentation/devicetree/bindings/power/power-domain.yaml
+++ b/Documentation/devicetree/bindings/power/power-domain.yaml
@@ -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: