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| author | Lukasz Luba <lukasz.luba@arm.com> | 2020-12-09 12:51:43 +0100 |
|---|---|---|
| committer | Rob Herring <robh@kernel.org> | 2020-12-14 23:07:09 +0100 |
| commit | e33dc2f3636749c2f949a59c2ff8acd4a69c9c78 (patch) | |
| tree | 08d534afbea944c331c30513acf2ba5ef7ee1b8a | |
| parent | dt-bindings: mali-midgard: Add dynamic-power-coefficient (diff) | |
| download | linux-e33dc2f3636749c2f949a59c2ff8acd4a69c9c78.tar.xz linux-e33dc2f3636749c2f949a59c2ff8acd4a69c9c78.zip | |
dt-bindings: mali-bifrost: Add dynamic-power-coefficient
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>
| -rw-r--r-- | Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml | 17 |
1 files changed, 17 insertions, 0 deletions
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 |