xref: /kernel/linux/linux-6.6/Documentation/devicetree/bindings/serial/renesas,hscif.yaml

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

title: Renesas High Speed Serial Communication Interface with FIFO (HSCIF)

maintainers:
  - Geert Uytterhoeven <geert+renesas@glider.be>

allOf:
  - $ref: serial.yaml#

properties:
  compatible:
    oneOf:
      - items:
          - enum:
              - renesas,hscif-r8a7778      # R-Car M1
              - renesas,hscif-r8a7779      # R-Car H1
          - const: renesas,rcar-gen1-hscif # R-Car Gen1
          - const: renesas,hscif           # generic HSCIF compatible UART

      - items:
          - enum:
              - renesas,hscif-r8a7742      # RZ/G1H
              - renesas,hscif-r8a7743      # RZ/G1M
              - renesas,hscif-r8a7744      # RZ/G1N
              - renesas,hscif-r8a7745      # RZ/G1E
              - renesas,hscif-r8a77470     # RZ/G1C
              - renesas,hscif-r8a7790      # R-Car H2
              - renesas,hscif-r8a7791      # R-Car M2-W
              - renesas,hscif-r8a7792      # R-Car V2H
              - renesas,hscif-r8a7793      # R-Car M2-N
              - renesas,hscif-r8a7794      # R-Car E2
          - const: renesas,rcar-gen2-hscif # R-Car Gen2 and RZ/G1
          - const: renesas,hscif           # generic HSCIF compatible UART

      - items:
          - enum:
              - renesas,hscif-r8a774a1     # RZ/G2M
              - renesas,hscif-r8a774b1     # RZ/G2N
              - renesas,hscif-r8a774c0     # RZ/G2E
              - renesas,hscif-r8a774e1     # RZ/G2H
              - renesas,hscif-r8a7795      # R-Car H3
              - renesas,hscif-r8a7796      # R-Car M3-W
              - renesas,hscif-r8a77961     # R-Car M3-W+
              - renesas,hscif-r8a77965     # R-Car M3-N
              - renesas,hscif-r8a77970     # R-Car V3M
              - renesas,hscif-r8a77980     # R-Car V3H
              - renesas,hscif-r8a77990     # R-Car E3
              - renesas,hscif-r8a77995     # R-Car D3
          - const: renesas,rcar-gen3-hscif # R-Car Gen3 and RZ/G2
          - const: renesas,hscif           # generic HSCIF compatible UART

      - items:
          - enum:
              - renesas,hscif-r8a779a0     # R-Car V3U
              - renesas,hscif-r8a779f0     # R-Car S4-8
              - renesas,hscif-r8a779g0     # R-Car V4H
          - const: renesas,rcar-gen4-hscif # R-Car Gen4
          - const: renesas,hscif           # generic HSCIF compatible UART

  reg:
    maxItems: 1

  interrupts:
    maxItems: 1

  clocks:
    minItems: 1
    maxItems: 4

  clock-names:
    minItems: 1
    maxItems: 4
    items:
      enum:
        - fck # UART functional clock
        - hsck # optional external clock input
        - brg_int # optional internal clock source for BRG frequency divider
        - scif_clk # optional external clock source for BRG frequency divider

  power-domains:
    maxItems: 1

  resets:
    maxItems: 1

  dmas:
    minItems: 2
    maxItems: 4
    description:
      Must contain a list of pairs of references to DMA specifiers, one for
      transmission, and one for reception.

  dma-names:
    minItems: 2
    maxItems: 4
    items:
      enum:
        - tx
        - rx

required:
  - compatible
  - reg
  - interrupts
  - clocks
  - clock-names
  - power-domains

unevaluatedProperties: false

if:
  properties:
    compatible:
      contains:
        enum:
          - renesas,rcar-gen2-hscif
          - renesas,rcar-gen3-hscif
          - renesas,rcar-gen4-hscif
then:
  required:
    - resets

examples:
  - |
    #include <dt-bindings/clock/r8a7795-cpg-mssr.h>
    #include <dt-bindings/interrupt-controller/arm-gic.h>
    #include <dt-bindings/power/r8a7795-sysc.h>
    aliases {
        serial1 = &hscif1;
    };

    hscif1: serial@e6550000 {
        compatible = "renesas,hscif-r8a7795", "renesas,rcar-gen3-hscif",
                     "renesas,hscif";
        reg = <0xe6550000 96>;
        interrupts = <GIC_SPI 155 IRQ_TYPE_LEVEL_HIGH>;
        clocks = <&cpg CPG_MOD 519>, <&cpg CPG_CORE R8A7795_CLK_S3D1>,
                 <&scif_clk>;
        clock-names = "fck", "brg_int", "scif_clk";
        dmas = <&dmac1 0x33>, <&dmac1 0x32>, <&dmac2 0x33>, <&dmac2 0x32>;
        dma-names = "tx", "rx", "tx", "rx";
        power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
        resets = <&cpg 519>;
        uart-has-rtscts;
    };