Documentation/devicetree/bindings/net/can/renesas,rcar-canfd.yaml

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/net/can/renesas,rcar-canfd.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Renesas R-Car CAN FD Controller

maintainers:
  - Fabrizio Castro <fabrizio.castro.jz@renesas.com>

allOf:
  - $ref: can-controller.yaml#

properties:
  compatible:
    oneOf:
      - items:
          - enum:
              - renesas,r8a774a1-canfd     # RZ/G2M
              - renesas,r8a774b1-canfd     # RZ/G2N
              - renesas,r8a774c0-canfd     # RZ/G2E
              - renesas,r8a774e1-canfd     # RZ/G2H
              - renesas,r8a7795-canfd      # R-Car H3
              - renesas,r8a7796-canfd      # R-Car M3-W
              - renesas,r8a77965-canfd     # R-Car M3-N
              - renesas,r8a77970-canfd     # R-Car V3M
              - renesas,r8a77980-canfd     # R-Car V3H
              - renesas,r8a77990-canfd     # R-Car E3
              - renesas,r8a77995-canfd     # R-Car D3
          - const: renesas,rcar-gen3-canfd # R-Car Gen3 and RZ/G2

      - items:
          - enum:
              - renesas,r9a07g044-canfd    # RZ/G2{L,LC}
          - const: renesas,rzg2l-canfd     # RZ/G2L family

  reg:
    maxItems: 1

  interrupts: true

  clocks:
    maxItems: 3

  clock-names:
    items:
      - const: fck
      - const: canfd
      - const: can_clk

  power-domains:
    maxItems: 1

  resets: true

  renesas,no-can-fd:
    $ref: /schemas/types.yaml#/definitions/flag
    description:
      The controller can operate in either CAN FD only mode (default) or
      Classical CAN only mode.  The mode is global to both the channels.
      Specify this property to put the controller in Classical CAN only mode.

  assigned-clocks:
    description:
      Reference to the CANFD clock.  The CANFD clock is a div6 clock and can be
      used by both CAN (if present) and CAN FD controllers at the same time.
      It needs to be scaled to maximum frequency if any of these controllers
      use it.

  assigned-clock-rates:
    description: Maximum frequency of the CANFD clock.

patternProperties:
  "^channel[01]$":
    type: object
    description:
      The controller supports two channels and each is represented as a child
      node.  Each child node supports the "status" property only, which
      is used to enable/disable the respective channel.

required:
  - compatible
  - reg
  - interrupts
  - clocks
  - clock-names
  - power-domains
  - resets
  - assigned-clocks
  - assigned-clock-rates
  - channel0
  - channel1

if:
  properties:
    compatible:
      contains:
        enum:
          - renesas,rzg2l-canfd
then:
  properties:
    interrupts:
      items:
        - description: CAN global error interrupt
        - description: CAN receive FIFO interrupt
        - description: CAN0 error interrupt
        - description: CAN0 transmit interrupt
        - description: CAN0 transmit/receive FIFO receive completion interrupt
        - description: CAN1 error interrupt
        - description: CAN1 transmit interrupt
        - description: CAN1 transmit/receive FIFO receive completion interrupt

    interrupt-names:
      items:
        - const: g_err
        - const: g_recc
        - const: ch0_err
        - const: ch0_rec
        - const: ch0_trx
        - const: ch1_err
        - const: ch1_rec
        - const: ch1_trx

    resets:
      maxItems: 2

    reset-names:
      items:
        - const: rstp_n
        - const: rstc_n

  required:
    - interrupt-names
    - reset-names
else:
  properties:
    interrupts:
      items:
        - description: Channel interrupt
        - description: Global interrupt

    interrupt-names:
      items:
        - const: ch_int
        - const: g_int

    resets:
      maxItems: 1

unevaluatedProperties: false

examples:
  - |
    #include <dt-bindings/clock/r8a7795-cpg-mssr.h>
    #include <dt-bindings/interrupt-controller/arm-gic.h>
    #include <dt-bindings/power/r8a7795-sysc.h>

    canfd: can@e66c0000 {
            compatible = "renesas,r8a7795-canfd",
                         "renesas,rcar-gen3-canfd";
            reg = <0xe66c0000 0x8000>;
            interrupts = <GIC_SPI 29 IRQ_TYPE_LEVEL_HIGH>,
                         <GIC_SPI 30 IRQ_TYPE_LEVEL_HIGH>;
            clocks = <&cpg CPG_MOD 914>,
                     <&cpg CPG_CORE R8A7795_CLK_CANFD>,
                     <&can_clk>;
            clock-names = "fck", "canfd", "can_clk";
            assigned-clocks = <&cpg CPG_CORE R8A7795_CLK_CANFD>;
            assigned-clock-rates = <40000000>;
            power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
            resets = <&cpg 914>;

            channel0 {
            };

            channel1 {
            };
    };