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- #power-domain-cells: number of cells in power domain specifier;
12    must be 0.
13
14Optional Properties:
15- clocks: List of clock handles. The parent clocks of the input clocks to the
16	devices in this power domain are set to oscclk before power gating
17	and restored back after powering on a domain. This is required for
18	all domains which are powered on and off and not required for unused
19	domains.
20- clock-names: The following clocks can be specified:
21	- oscclk: Oscillator clock.
22	- clkN: Input clocks to the devices in this power domain. These clocks
23		will be reparented to oscclk before swithing power domain off.
24		Their original parent will be brought back after turning on
25		the domain. Maximum of 4 clocks (N = 0 to 3) are supported.
26	- asbN: Clocks required by asynchronous bridges (ASB) present in
27		the power domain. These clock should be enabled during power
28		domain on/off operations.
29- power-domains: phandle pointing to the parent power domain, for more details
30		 see Documentation/devicetree/bindings/power/power_domain.txt
31
32Node of a device using power domains must have a power-domains property
33defined with a phandle to respective power domain.
34
35Example:
36
37	lcd0: power-domain-lcd0 {
38		compatible = "samsung,exynos4210-pd";
39		reg = <0x10023C00 0x10>;
40		#power-domain-cells = <0>;
41	};
42
43	mfc_pd: power-domain@10044060 {
44		compatible = "samsung,exynos4210-pd";
45		reg = <0x10044060 0x20>;
46		clocks = <&clock CLK_FIN_PLL>, <&clock CLK_MOUT_USER_ACLK333>;
47		clock-names = "oscclk", "clk0";
48		#power-domain-cells = <0>;
49	};
50
51See Documentation/devicetree/bindings/power/power_domain.txt for description
52of consumer-side bindings.
53