`The dynamic power consumption of a device is proportional to thesquare of voltage (V) and the clock frequency (f). It can be expressed asPdyn = dynamic-power-coefficient * V^2 * f.The coefficient represents the running time dynamic power consumption inunits of mw/MHz/uVolt^2 and can be used in the above formula tocalculate the dynamic power in mW.Signed-off-by: Punit Agrawal <punit.agrawal@arm.com>Acked-by: Rob Herring <robh@kernel.org>Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>Cc: Mark Rutland <mark.rutland@arm.com>--- Documentation/devicetree/bindings/arm/cpus.txt | 17 +++++++++++++++++ 1 file changed, 17 insertions(+)diff --git a/Documentation/devicetree/bindings/arm/cpus.txt b/Documentation/devicetree/bindings/arm/cpus.txtindex 3a07a87..6aca64f 100644--- a/Documentation/devicetree/bindings/arm/cpus.txt+++ b/Documentation/devicetree/bindings/arm/cpus.txt@@ -242,6 +242,23 @@ nodes to be present and contain the properties described below. 		Definition: Specifies the syscon node controlling the cpu core 			    power domains. +	- 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):  	cpus {-- 2.6.2`