From e33dc2f3636749c2f949a59c2ff8acd4a69c9c78 Mon Sep 17 00:00:00 2001 From: Lukasz Luba Date: Wed, 9 Dec 2020 11:51:43 +0000 Subject: [PATCH] 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 Link: https://lore.kernel.org/r/20201209115143.15321-3-lukasz.luba@arm.com Signed-off-by: Rob Herring --- .../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