Documentation/devicetree/bindings/serial/fsl-lpuart.yaml

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

title: Freescale low power universal asynchronous receiver/transmitter (lpuart)

maintainers:
  - Fugang Duan <fugang.duan@nxp.com>

allOf:
  - $ref: "rs485.yaml"

properties:
  compatible:
    oneOf:
      - enum:
          - fsl,vf610-lpuart
          - fsl,ls1021a-lpuart
          - fsl,ls1028a-lpuart
          - fsl,imx7ulp-lpuart
          - fsl,imx8qxp-lpuart
          - fsl,imxrt1050-lpuart
      - items:
          - enum:
              - fsl,imx93-lpuart
              - fsl,imx8ulp-lpuart
          - const: fsl,imx7ulp-lpuart
      - items:
          - enum:
              - fsl,imx8qm-lpuart
              - fsl,imx8dxl-lpuart
          - const: fsl,imx8qxp-lpuart

  reg:
    maxItems: 1

  interrupts:
    maxItems: 1

  clocks:
    items:
      - description: ipg clock
      - description: baud clock
    minItems: 1

  clock-names:
    items:
      - const: ipg
      - const: baud
    minItems: 1

  dmas:
    items:
      - description: DMA controller phandle and request line for RX
      - description: DMA controller phandle and request line for TX

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

  rs485-rts-active-low: true
  linux,rs485-enabled-at-boot-time: true

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

unevaluatedProperties: false

examples:
  - |
    #include <dt-bindings/clock/vf610-clock.h>

    serial@40027000 {
        compatible = "fsl,vf610-lpuart";
        reg = <0x40027000 0x1000>;
        interrupts = <0 61 0x00>;
        clocks = <&clks VF610_CLK_UART0>;
        clock-names = "ipg";
        dmas = <&edma0 0 2>, <&edma0 0 3>;
        dma-names = "rx","tx";
    };