linux/Documentation/devicetree/bindings/arm/exynos/power_domain.txt
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   1* Samsung Exynos Power Domains
   2
   3Exynos processors include support for multiple power domains which are used
   4to gate power to one or more peripherals on the processor.
   5
   6Required Properties:
   7- compatible: should be one of the following.
   8    * samsung,exynos4210-pd - for exynos4210 type power domain.
   9- reg: physical base address of the controller and length of memory mapped
  10    region.
  11
  12Node of a device using power domains must have a samsung,power-domain property
  13defined with a phandle to respective power domain.
  14
  15Example:
  16
  17        lcd0: power-domain-lcd0 {
  18                compatible = "samsung,exynos4210-pd";
  19                reg = <0x10023C00 0x10>;
  20        };
  21
  22Example of the node using power domain:
  23
  24        node {
  25                /* ... */
  26                samsung,power-domain = <&lcd0>;
  27                /* ... */
  28        };
  29