[PATCH 2/2] dt-bindings: mali-bifrost: Add dynamic-power-coefficient

[Lukasz Luba]

Add a property dynamic-power-coefficient which allows to register Energy
Model for the Mali Bifrost devices.

Signed-off-by: Lukasz Luba <lukasz.luba@xxxxxxx>
---
 .../bindings/gpu/arm,mali-bifrost.yaml          | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml b/Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml
index b1844b9c295d..184492162e7e 100644
--- a/Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml
+++ b/Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml
@@ -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
-- 
2.17.1