* Renesas Clock Pulse Generator / Module Standby and Software Reset On Renesas ARM SoCs (SH/R-Mobile, R-Car, RZ), the CPG (Clock Pulse Generator) and MSSR (Module Standby and Software Reset) blocks are intimately connected, and share the same register block. They provide the following functionalities: - The CPG block generates various core clocks, - The MSSR block provides two functions: 1. Module Standby, providing a Clock Domain to control the clock supply to individual SoC devices, 2. Reset Control, to perform a software reset of individual SoC devices. Required Properties: - compatible: Must be one of: - "renesas,r7s9210-cpg-mssr" for the r7s9210 SoC (RZ/A2) - "renesas,r8a7743-cpg-mssr" for the r8a7743 SoC (RZ/G1M) - "renesas,r8a7744-cpg-mssr" for the r8a7744 SoC (RZ/G1N) - "renesas,r8a7745-cpg-mssr" for the r8a7745 SoC (RZ/G1E) - "renesas,r8a77470-cpg-mssr" for the r8a77470 SoC (RZ/G1C) - "renesas,r8a774a1-cpg-mssr" for the r8a774a1 SoC (RZ/G2M) - "renesas,r8a774c0-cpg-mssr" for the r8a774c0 SoC (RZ/G2E) - "renesas,r8a7790-cpg-mssr" for the r8a7790 SoC (R-Car H2) - "renesas,r8a7791-cpg-mssr" for the r8a7791 SoC (R-Car M2-W) - "renesas,r8a7792-cpg-mssr" for the r8a7792 SoC (R-Car V2H) - "renesas,r8a7793-cpg-mssr" for the r8a7793 SoC (R-Car M2-N) - "renesas,r8a7794-cpg-mssr" for the r8a7794 SoC (R-Car E2) - "renesas,r8a7795-cpg-mssr" for the r8a7795 SoC (R-Car H3) - "renesas,r8a7796-cpg-mssr" for the r8a7796 SoC (R-Car M3-W) - "renesas,r8a77965-cpg-mssr" for the r8a77965 SoC (R-Car M3-N) - "renesas,r8a77970-cpg-mssr" for the r8a77970 SoC (R-Car V3M) - "renesas,r8a77980-cpg-mssr" for the r8a77980 SoC (R-Car V3H) - "renesas,r8a77990-cpg-mssr" for the r8a77990 SoC (R-Car E3) - "renesas,r8a77995-cpg-mssr" for the r8a77995 SoC (R-Car D3) - reg: Base address and length of the memory resource used by the CPG/MSSR block - clocks: References to external parent clocks, one entry for each entry in clock-names - clock-names: List of external parent clock names. Valid names are: - "extal" (r7s9210, r8a7743, r8a7744, r8a7745, r8a77470, r8a774a1, r8a774c0, r8a7790, r8a7791, r8a7792, r8a7793, r8a7794, r8a7795, r8a7796, r8a77965, r8a77970, r8a77980, r8a77990, r8a77995) - "extalr" (r8a774a1, r8a7795, r8a7796, r8a77965, r8a77970, r8a77980) - "usb_extal" (r8a7743, r8a7744, r8a7745, r8a77470, r8a7790, r8a7791, r8a7793, r8a7794) - #clock-cells: Must be 2 - For CPG core clocks, the two clock specifier cells must be "CPG_CORE" and a core clock reference, as defined in . - For module clocks, the two clock specifier cells must be "CPG_MOD" and a module number, as defined in the datasheet. - #power-domain-cells: Must be 0 - SoC devices that are part of the CPG/MSSR Clock Domain and can be power-managed through Module Standby 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. - #reset-cells: Must be 1 - The single reset specifier cell must be the module number, as defined in the datasheet. Examples -------- - CPG device node: cpg: clock-controller@e6150000 { compatible = "renesas,r8a7795-cpg-mssr"; reg = <0 0xe6150000 0 0x1000>; clocks = <&extal_clk>, <&extalr_clk>; clock-names = "extal", "extalr"; #clock-cells = <2>; #power-domain-cells = <0>; #reset-cells = <1>; }; - CPG/MSSR Clock Domain member device node: scif2: serial@e6e88000 { compatible = "renesas,scif-r8a7795", "renesas,scif"; reg = <0 0xe6e88000 0 64>; interrupts = ; clocks = <&cpg CPG_MOD 310>; clock-names = "fck"; dmas = <&dmac1 0x13>, <&dmac1 0x12>; dma-names = "tx", "rx"; power-domains = <&cpg>; resets = <&cpg 310>; };