Merge tag 'devicetree-for-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/robh...

[cascardo/linux.git] / Documentation / devicetree / bindings / arm / cpus.txt

diff --git a/Documentation/devicetree/bindings/arm/cpus.txt b/Documentation/devicetree/bindings/arm/cpus.txt
index 58e240d..c352c11 100644 (file)
--- a/Documentation/devicetree/bindings/arm/cpus.txt
+++ b/Documentation/devicetree/bindings/arm/cpus.txt
@@ -243,6 +243,23 @@ 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 {