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Diffstat (limited to 'Documentation/devicetree/bindings/clock/renesas,r8a7779-cpg-clocks.txt')
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diff --git a/Documentation/devicetree/bindings/clock/renesas,r8a7779-cpg-clocks.txt b/Documentation/devicetree/bindings/clock/renesas,r8a7779-cpg-clocks.txt new file mode 100644 index 000000000..8c81547c2 --- /dev/null +++ b/Documentation/devicetree/bindings/clock/renesas,r8a7779-cpg-clocks.txt @@ -0,0 +1,49 @@ +* Renesas R8A7779 Clock Pulse Generator (CPG) + +The CPG generates core clocks for the R8A7779. It includes one PLL 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,r8a7779-cpg-clocks" + - reg: Base address and length of the memory resource used by the CPG + + - clocks: Reference to the parent clock + - #clock-cells: Must be 1 + - clock-output-names: The names of the clocks. Supported clocks are "plla", + "z", "zs", "s", "s1", "p", "b", "out". + - #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,r8a7779-cpg-clocks"; + reg = <0xffc80000 0x30>; + clocks = <&extal_clk>; + #clock-cells = <1>; + clock-output-names = "plla", "z", "zs", "s", "s1", "p", + "b", "out"; + #power-domain-cells = <0>; + }; + + + - CPG/MSTP Clock Domain member device node: + + sata: sata@fc600000 { + compatible = "renesas,sata-r8a7779", "renesas,rcar-sata"; + reg = <0xfc600000 0x2000>; + interrupts = <0 100 IRQ_TYPE_LEVEL_HIGH>; + clocks = <&mstp1_clks R8A7779_CLK_SATA>; + power-domains = <&cpg_clocks>; + }; |