| 1234567891011121314151617181920212223242526272829303132333435363738394041424344454647 |
- * Samsung Exynos Power Domains
- Exynos processors include support for multiple power domains which are used
- to gate power to one or more peripherals on the processor.
- Required Properties:
- - compatible: should be one of the following.
- * samsung,exynos4210-pd - for exynos4210 type power domain.
- - reg: physical base address of the controller and length of memory mapped
- region.
- - #power-domain-cells: number of cells in power domain specifier;
- must be 0.
- Optional Properties:
- - clocks: List of clock handles. The parent clocks of the input clocks to the
- devices in this power domain are set to oscclk before power gating
- and restored back after powering on a domain. This is required for
- all domains which are powered on and off and not required for unused
- domains.
- - clock-names: The following clocks can be specified:
- - oscclk: Oscillator clock.
- - pclkN, clkN: Pairs of parent of input clock and input clock to the
- devices in this power domain. Maximum of 4 pairs (N = 0 to 3)
- are supported currently.
- Node of a device using power domains must have a samsung,power-domain property
- defined with a phandle to respective power domain.
- Example:
- lcd0: power-domain-lcd0 {
- compatible = "samsung,exynos4210-pd";
- reg = <0x10023C00 0x10>;
- #power-domain-cells = <0>;
- };
- mfc_pd: power-domain@10044060 {
- compatible = "samsung,exynos4210-pd";
- reg = <0x10044060 0x20>;
- clocks = <&clock CLK_FIN_PLL>, <&clock CLK_MOUT_SW_ACLK333>,
- <&clock CLK_MOUT_USER_ACLK333>;
- clock-names = "oscclk", "pclk0", "clk0";
- #power-domain-cells = <0>;
- };
- See Documentation/devicetree/bindings/power/power_domain.txt for description
- of consumer-side bindings.
|