Diffstat (limited to 'Documentation/devicetree/bindings/arm/cpus.txt')
1 files changed, 17 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/arm/cpus.txt b/Documentation/devicetree/bindings/arm/cpus.txt
index 3a07a87fef20..6aca64f289b6 100644
@@ -242,6 +242,23 @@ nodes to be present and contain the properties described below.
Definition: Specifies the syscon node controlling the cpu core
+ - dynamic-power-coefficient
+ Usage: optional
+ Value type: <prop-encoded-array>
+ Definition: A u32 value that represents the running time dynamic
+ power coefficient in units of mW/MHz/uVolt^2. The
+ coefficient can either be calculated from power
+ measurements or derived by analysis.
+ The dynamic power consumption of the CPU 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 uV, frequency is in MHz.
Example 1 (dual-cluster big.LITTLE system 32-bit):