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* Renesas R8A7778 Clock Pulse Generator (CPG)
The CPG generates core clocks for the R8A7778. It includes two PLLs and
several fixed ratio dividers.
The CPG also provides a Clock Domain for SoC devices, in combination with the
CPG Module Stop (MSTP) Clocks.
Required Properties:
- compatible: Must be "renesas,r8a7778-cpg-clocks"
- reg: Base address and length of the memory resource used by the CPG
- #clock-cells: Must be 1
- clock-output-names: The names of the clocks. Supported clocks are
"plla", "pllb", "b", "out", "p", "s", and "s1".
- #power-domain-cells: Must be 0
SoC devices that are part of the CPG/MSTP Clock Domain and can be power-managed
through an MSTP clock should refer to the CPG device node in their
"power-domains" property, as documented by the generic PM domain bindings in
Documentation/devicetree/bindings/power/power_domain.txt.
Examples
--------
- CPG device node:
cpg_clocks: cpg_clocks@ffc80000 {
compatible = "renesas,r8a7778-cpg-clocks";
reg = <0xffc80000 0x80>;
#clock-cells = <1>;
clocks = <&extal_clk>;
clock-output-names = "plla", "pllb", "b",
"out", "p", "s", "s1";
#power-domain-cells = <0>;
};
- CPG/MSTP Clock Domain member device node:
sdhi0: sd@ffe4c000 {
compatible = "renesas,sdhi-r8a7778";
reg = <0xffe4c000 0x100>;
interrupts = <0 87 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&mstp3_clks R8A7778_CLK_SDHI0>;
power-domains = <&cpg_clocks>;
status = "disabled";
};
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