linux-kernel - [PATCH v2 3/3] dt-bindings: thermal: update sustainable-power with abstract scale

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Message-Id: <20201002114426.31277-4-lukasz.luba@arm.com>
Date:   Fri,  2 Oct 2020 12:44:26 +0100
From:   Lukasz Luba <lukasz.luba@....com>
To:     linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
        linux-doc@...r.kernel.org, devicetree@...r.kernel.org
Cc:     robh+dt@...nel.org, amitk@...nel.org, corbet@....net,
        daniel.lezcano@...aro.org, lukasz.luba@....com,
        Dietmar.Eggemann@....com, qperret@...gle.com,
        dianders@...omium.org, mka@...omium.org, rnayak@...eaurora.org,
        rjw@...ysocki.net
Subject: [PATCH v2 3/3] dt-bindings: thermal: update sustainable-power with abstract scale

Update the documentation for the binding 'sustainable-power' and allow
to provide values in an abstract scale. It is required when the cooling
devices use an abstract scale for their power values.

Signed-off-by: Lukasz Luba <lukasz.luba@....com>
---
 .../devicetree/bindings/thermal/thermal-zones.yaml  | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/Documentation/devicetree/bindings/thermal/thermal-zones.yaml b/Documentation/devicetree/bindings/thermal/thermal-zones.yaml
index 3ec9cc87ec50..4d8f2e37d1e6 100644
--- a/Documentation/devicetree/bindings/thermal/thermal-zones.yaml
+++ b/Documentation/devicetree/bindings/thermal/thermal-zones.yaml
@@ -99,10 +99,15 @@ patternProperties:
       sustainable-power:
         $ref: /schemas/types.yaml#/definitions/uint32
         description:
-          An estimate of the sustainable power (in mW) that this thermal zone
-          can dissipate at the desired control temperature. For reference, the
-          sustainable power of a 4-inch phone is typically 2000mW, while on a
-          10-inch tablet is around 4500mW.
+          An estimate of the sustainable power (in mW or in an abstract scale)
+	  that this thermal zone can dissipate at the desired control
+	  temperature. For reference, the sustainable power of a 4-inch phone
+	  is typically 2000mW, while on a 10-inch tablet is around 4500mW.
+
+	  It is possible to express the sustainable power in an abstract
+	  scale. This is the case when the related cooling devices use also
+	  abstract scale to express their power usage. The scale must be
+	  consistent.
 
       trips:
         type: object
-- 
2.17.1