1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 2%YAML 1.2 3--- 4$id: "http://devicetree.org/schemas/clock/renesas,cpg-mssr.yaml#" 5$schema: "http://devicetree.org/meta-schemas/core.yaml#" 6 7title: Renesas Clock Pulse Generator / Module Standby and Software Reset 8 9maintainers: 10 - Geert Uytterhoeven <geert+renesas@glider.be> 11 12description: | 13 On Renesas ARM SoCs (SH/R-Mobile, R-Car, RZ), the CPG (Clock Pulse Generator) 14 and MSSR (Module Standby and Software Reset) blocks are intimately connected, 15 and share the same register block. 16 17 They provide the following functionalities: 18 - The CPG block generates various core clocks, 19 - The MSSR block provides two functions: 20 1. Module Standby, providing a Clock Domain to control the clock supply 21 to individual SoC devices, 22 2. Reset Control, to perform a software reset of individual SoC devices. 23 24properties: 25 compatible: 26 enum: 27 - renesas,r7s9210-cpg-mssr # RZ/A2 28 - renesas,r8a7742-cpg-mssr # RZ/G1H 29 - renesas,r8a7743-cpg-mssr # RZ/G1M 30 - renesas,r8a7744-cpg-mssr # RZ/G1N 31 - renesas,r8a7745-cpg-mssr # RZ/G1E 32 - renesas,r8a77470-cpg-mssr # RZ/G1C 33 - renesas,r8a774a1-cpg-mssr # RZ/G2M 34 - renesas,r8a774b1-cpg-mssr # RZ/G2N 35 - renesas,r8a774c0-cpg-mssr # RZ/G2E 36 - renesas,r8a774e1-cpg-mssr # RZ/G2H 37 - renesas,r8a7790-cpg-mssr # R-Car H2 38 - renesas,r8a7791-cpg-mssr # R-Car M2-W 39 - renesas,r8a7792-cpg-mssr # R-Car V2H 40 - renesas,r8a7793-cpg-mssr # R-Car M2-N 41 - renesas,r8a7794-cpg-mssr # R-Car E2 42 - renesas,r8a7795-cpg-mssr # R-Car H3 43 - renesas,r8a7796-cpg-mssr # R-Car M3-W 44 - renesas,r8a77961-cpg-mssr # R-Car M3-W+ 45 - renesas,r8a77965-cpg-mssr # R-Car M3-N 46 - renesas,r8a77970-cpg-mssr # R-Car V3M 47 - renesas,r8a77980-cpg-mssr # R-Car V3H 48 - renesas,r8a77990-cpg-mssr # R-Car E3 49 - renesas,r8a77995-cpg-mssr # R-Car D3 50 51 reg: 52 maxItems: 1 53 54 clocks: 55 minItems: 1 56 maxItems: 2 57 58 clock-names: 59 minItems: 1 60 maxItems: 2 61 items: 62 enum: 63 - extal # All 64 - extalr # Most R-Car Gen3 and RZ/G2 65 - usb_extal # Most R-Car Gen2 and RZ/G1 66 67 '#clock-cells': 68 description: | 69 - For CPG core clocks, the two clock specifier cells must be "CPG_CORE" 70 and a core clock reference, as defined in 71 <dt-bindings/clock/*-cpg-mssr.h> 72 - For module clocks, the two clock specifier cells must be "CPG_MOD" and 73 a module number, as defined in the datasheet. 74 const: 2 75 76 '#power-domain-cells': 77 description: 78 SoC devices that are part of the CPG/MSSR Clock Domain and can be 79 power-managed through Module Standby should refer to the CPG device node 80 in their "power-domains" property, as documented by the generic PM Domain 81 bindings in Documentation/devicetree/bindings/power/power-domain.yaml. 82 const: 0 83 84 '#reset-cells': 85 description: 86 The single reset specifier cell must be the module number, as defined in 87 the datasheet. 88 const: 1 89 90if: 91 not: 92 properties: 93 compatible: 94 items: 95 enum: 96 - renesas,r7s9210-cpg-mssr 97then: 98 required: 99 - '#reset-cells' 100 101required: 102 - compatible 103 - reg 104 - clocks 105 - clock-names 106 - '#clock-cells' 107 - '#power-domain-cells' 108 109additionalProperties: false 110 111examples: 112 - | 113 cpg: clock-controller@e6150000 { 114 compatible = "renesas,r8a7795-cpg-mssr"; 115 reg = <0xe6150000 0x1000>; 116 clocks = <&extal_clk>, <&extalr_clk>; 117 clock-names = "extal", "extalr"; 118 #clock-cells = <2>; 119 #power-domain-cells = <0>; 120 #reset-cells = <1>; 121 }; 122