[PATCH v2 2/5] dt-bindings: gpu: add a power_model optional properties for MALI

Caesar Wang
2017-07-17T08:14:55Z

This patch adds the MALI's power-model to set the IPA model to be used
for power management.

Signed-off-by: Caesar Wang <wxt@rock-chips.com>
---

Changes in v2: None

Documentation/devicetree/bindings/gpu/arm,mali-midgard.txt | 12 ++++++++++++
1 file changed, 12 insertions(+)

diff --git a/Documentation/devicetree/bindings/gpu/arm,mali-midgard.txt b/Documentation/devicetree/bindings/gpu/arm,mali-midgard.txt
index a461e47..b616e6b 100644
--- a/Documentation/devicetree/bindings/gpu/arm,mali-midgard.txt
+++ b/Documentation/devicetree/bindings/gpu/arm,mali-midgard.txt
@@ -37,6 +37,18 @@ Optional properties:
- operating-points-v2 : Refer to Documentation/devicetree/bindings/power/opp.txt
for details.

+- power_model : Sets power model parameters. Note that this model was designed for the Juno
+ platform, and may not be suitable for other platforms. A structure containing :
+ - compatible: Should be arm,mali-simple-power-model
+ - dynamic-coefficient: Coefficient, in pW/(Hz V^2), which is multiplied
+ by v^2*f to calculate the dynamic power consumption.
+ - static-coefficient: Coefficient, in uW/V^3, which is multiplied by
+ v^3 to calculate the static power consumption.
+ - ts: An array containing coefficients for the temperature scaling
+ factor. This is used to scale the static power by a factor of
+ tsf/1000000, where tsf = ts[3]*T^3 + ts[2]*T^2 + ts[1]*T + ts[0],
+ and T = temperature in degrees.
+ - thermal-zone: A string identifying the thermal zone used for the GPU

Example for a Mali-T760:

--
2.7.4