Quelle  vexpress.txt

Versatile Express voltage regulators
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Requires node properties:
- "compatible" value: "arm,vexpress-volt"
- "arm,vexpress-sysreg,func" when controlled via vexpress-sysreg
  (see Documentation/devicetree/bindings/arm/vexpress-config.yaml
  for more details)

Required regulator properties:
- "regulator-name"
- "regulator-always-on"

Optional regulator properties:
- "regulator-min-microvolt"
- "regulator-max-microvolt"

See Documentation/devicetree/bindings/regulator/regulator.txt
for more details about the regulator properties.

When no "regulator-[min|max]-microvolt" properties are defined,
the device is treated as fixed (or rather "read-only") regulator.

Example:
 volt@0 {
  compatible = "arm,vexpress-volt";
  arm,vexpress-sysreg,func = <2 0>;
  regulator-name = "Cores";
  regulator-min-microvolt = <800000>;
  regulator-max-microvolt = <1050000>;
  regulator-always-on;
 };