renesas,rcar-gen3-wwdt.yaml

  1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
  2%YAML 1.2
  3---
  4$id: http://devicetree.org/schemas/watchdog/renesas,rcar-gen3-wwdt.yaml#
  5$schema: http://devicetree.org/meta-schemas/core.yaml#
  6
  7title: Renesas Window Watchdog Timer (WWDT) Controller
  8
  9maintainers:
 10  - Wolfram Sang <wsa+renesas@sang-engineering.com>
 11
 12properties:
 13  compatible:
 14    oneOf:
 15      - items:
 16          - enum:
 17              - renesas,r8a77970-wwdt  # R-Car V3M
 18              - renesas,r8a77980-wwdt  # R-Car V3H
 19          - const: renesas,rcar-gen3-wwdt
 20
 21      - items:
 22          - enum:
 23              - renesas,r8a779a0-wwdt  # R-Car V3U
 24              - renesas,r8a779f0-wwdt  # R-Car S4
 25              - renesas,r8a779g0-wwdt  # R-Car V4H
 26              - renesas,r8a779h0-wwdt  # R-Car V4M
 27          - const: renesas,rcar-gen4-wwdt
 28
 29  reg:
 30    maxItems: 1
 31
 32  interrupts:
 33    items:
 34      - description: Pretimeout, 75% of overflow reached
 35      - description: Error occurred
 36
 37  interrupt-names:
 38    items:
 39      - const: pretimeout
 40      - const: error
 41
 42  clocks:
 43    items:
 44      - description: Counting clock
 45      - description: Bus clock
 46
 47  clock-names:
 48    items:
 49      - const: cnt
 50      - const: bus
 51
 52  resets:
 53    minItems: 1
 54    maxItems: 2
 55
 56  reset-names:
 57    minItems: 1
 58    items:
 59      - const: cnt
 60      - const: bus
 61
 62  power-domains:
 63    maxItems: 1
 64
 65required:
 66  - compatible
 67  - reg
 68  - interrupts
 69  - interrupt-names
 70  - clocks
 71  - clock-names
 72  - resets
 73  - reset-names
 74  - power-domains
 75
 76allOf:
 77  - $ref: watchdog.yaml#
 78
 79  - if:
 80      properties:
 81        compatible:
 82          contains:
 83            enum:
 84              - renesas,r8a779a0-wwdt
 85              - renesas,r8a779f0-wwdt
 86    then:
 87      properties:
 88        resets:
 89          minItems: 2
 90        reset-names:
 91          minItems: 2
 92
 93additionalProperties: false
 94
 95examples:
 96  - |
 97    #include <dt-bindings/clock/r8a779g0-cpg-mssr.h>
 98    #include <dt-bindings/power/r8a779g0-sysc.h>
 99    #include <dt-bindings/interrupt-controller/arm-gic.h>
100
101    watchdog@ffc90000 {
102            compatible = "renesas,r8a779g0-wwdt",
103                         "renesas,rcar-gen4-wwdt";
104            reg = <0xffc90000 0x10>;
105            interrupts = <GIC_SPI 310 IRQ_TYPE_LEVEL_HIGH>,
106                         <GIC_SPI 311 IRQ_TYPE_LEVEL_HIGH>;
107            interrupt-names = "pretimeout", "error";
108            clocks = <&cpg CPG_CORE R8A779G0_CLK_R>,
109                     <&cpg CPG_CORE R8A779G0_CLK_SASYNCRT>;
110            clock-names = "cnt", "bus";
111            power-domains = <&sysc R8A779G0_PD_ALWAYS_ON>;
112            resets = <&cpg 1200>;
113            reset-names = "cnt";
114    };