xref: /kernel/linux/linux-6.6/Documentation/devicetree/bindings/serial/brcm,bcm7271-uart.yaml (revision 62306a36)

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/serial/brcm,bcm7271-uart.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Broadcom 8250 based serial port

maintainers:
  - Al Cooper <alcooperx@gmail.com>

allOf:
  - $ref: serial.yaml#

description: |+
  The Broadcom UART is based on the basic 8250 UART but with
  enhancements for more accurate high speed baud rates and support
  for DMA.

properties:
  compatible:
    items:
      - enum:
          - brcm,bcm7271-uart
          - brcm,bcm7278-uart

  reg:
    minItems: 1
    maxItems: 5

  reg-names:
    description: The UART register block and optionally the DMA register blocks.
    oneOf:
      - items:
          - const: uart
      - items:
          - const: uart
          - const: dma_arb
          - const: dma_rx
          - const: dma_tx
          - const: dma_intr2

  clocks:
    minItems: 1

  clock-names:
    const: sw_baud

  interrupts:
    minItems: 1
    maxItems: 2

  interrupt-names:
    description: The UART interrupt and optionally the DMA interrupt.
    minItems: 1
    items:
      - const: uart
      - const: dma

required:
  - compatible
  - reg
  - reg-names
  - clocks
  - clock-names
  - interrupts
  - interrupt-names

unevaluatedProperties: false

examples:
  - |
    serial@840d000 {
        compatible = "brcm,bcm7271-uart";
        reg = <0x840d000 0x20>;
        reg-names = "uart";
        interrupts = <0x0 0x62 0x4>;
        interrupt-names = "uart";
        clocks = <&scmi_clk 190>;
        clock-names = "sw_baud";
    };

    serial@840e000 {
        compatible = "brcm,bcm7271-uart";
        reg = <0x840e000 0x20>,
              <0x840e080 0x8>,
              <0x840e100 0xa8>,
              <0x840e200 0x4c>,
              <0x840e300 0x30>;
        reg-names = "uart", "dma_arb", "dma_rx", "dma_tx", "dma_intr2";
        interrupts = <0x0 0x62 0x4>, <0x0 0x75 0x4>;
        interrupt-names = "uart", "dma";
        clocks = <&scmi_clk 190>;
        clock-names = "sw_baud";
    };