dt-bindings: mali-bifrost: Add dynamic-power-coefficient
authorLukasz Luba <lukasz.luba@arm.com>
Wed, 9 Dec 2020 11:51:43 +0000 (11:51 +0000)
committerRob Herring <robh@kernel.org>
Mon, 14 Dec 2020 22:07:09 +0000 (16:07 -0600)
Add a property dynamic-power-coefficient which allows to register Energy
Model for the Mali Bifrost devices.

Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Link: https://lore.kernel.org/r/20201209115143.15321-3-lukasz.luba@arm.com
Signed-off-by: Rob Herring <robh@kernel.org>
Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml

index b1844b9..1844921 100644 (file)
@@ -52,6 +52,23 @@ properties:
   "#cooling-cells":
     const: 2
 
+  dynamic-power-coefficient:
+    $ref: '/schemas/types.yaml#/definitions/uint32'
+    description:
+      A u32 value that represents the running time dynamic
+      power coefficient in units of uW/MHz/V^2. The
+      coefficient can either be calculated from power
+      measurements or derived by analysis.
+
+      The dynamic power consumption of the GPU is
+      proportional to the square of the Voltage (V) and
+      the clock frequency (f). The coefficient is used to
+      calculate the dynamic power as below -
+
+      Pdyn = dynamic-power-coefficient * V^2 * f
+
+      where voltage is in V, frequency is in MHz.
+
 required:
   - compatible
   - reg