Documentation/devicetree/bindings/serial/8250_omap.yaml

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/serial/8250_omap.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Bindings for 8250 compliant UARTs on TI's OMAP2+ and K3 SoCs

maintainers:
  - Vignesh Raghavendra <vigneshr@ti.com>

allOf:
  - $ref: /schemas/serial/serial.yaml#
  - $ref: /schemas/serial/rs485.yaml#

properties:
  compatible:
    oneOf:
      - enum:
          - ti,am3352-uart
          - ti,am4372-uart
          - ti,am654-uart
          - ti,dra742-uart
          - ti,omap2-uart
          - ti,omap3-uart
          - ti,omap4-uart
      - items:
          - enum:
              - ti,am64-uart
              - ti,j721e-uart
          - const: ti,am654-uart

  ti,hwmods:
    description:
      Must be "uart<n>", n being the instance number (1-based)
      This property is applicable only on legacy platforms mainly omap2/3
      and ti81xx and should not be used on other platforms.
    $ref: /schemas/types.yaml#/definitions/string
    deprecated: true

  dmas:
    minItems: 1
    maxItems: 2

  dma-names:
    items:
      - const: tx
      - const: rx

  reg:
    maxItems: 1

  interrupts:
    minItems: 1
    maxItems: 2
    description:
      First entry is module IRQ required for normal IO operation.
      Second entry is optional and corresponds to system wakeup IRQ
      where supported.

  clocks:
    maxItems: 1

  clock-names:
    const: fclk

  rts-gpios: true
  cts-gpios: true
  dtr-gpios: true
  dsr-gpios: true
  rng-gpios: true
  dcd-gpios: true
  rs485-rts-delay: true
  rs485-rts-active-low: true
  rs485-rx-during-tx: true
  rs485-rts-active-high: true
  linux,rs485-enabled-at-boot-time: true
  rts-gpio: true
  power-domains: true
  clock-frequency: true
  current-speed: true

required:
  - compatible
  - reg
  - interrupts

additionalProperties: false

if:
  properties:
    compatible:
      oneOf:
        - const: ti,omap2-uart
        - const: ti,omap3-uart
        - const: ti,omap4-uart

then:
  properties:
    ti,hwmods:
      items:
        - pattern: "^uart([1-9])$"

else:
  properties:
    ti,hwmods: false

examples:
  - |
          serial@49042000 {
            compatible = "ti,omap3-uart";
            reg = <0x49042000 0x400>;
            interrupts = <80>;
            dmas = <&sdma 81 &sdma 82>;
            dma-names = "tx", "rx";
            ti,hwmods = "uart4";
            clock-frequency = <48000000>;
          };