dts/bindings/serial/atmel,sam0-uart.yaml

description: Atmel SAM0 SERCOM UART driver

compatible: "atmel,sam0-uart"

include:
  - name: uart-controller.yaml
  - name: pinctrl-device.yaml

properties:
  reg:
    required: true

  interrupts:
    required: true

  clocks:
    required: true

  clock-names:
    required: true

  rxpo:
    type: int
    required: true
    description: |
      Receive Data Pinout. An enumeration with the following values:

      +-------+---------------+
      | Value | RX Pin        |
      +-------+---------------+
      |     0 | SERCOM_PAD[0] |
      +-------+---------------+
      |     1 | SERCOM_PAD[1] |
      +-------+---------------+
      |     2 | SERCOM_PAD[2] |
      +-------+---------------+
      |     3 | SERCOM_PAD[3] |
      +-------+---------------+


  txpo:
    type: int
    required: true
    description: |
      Transmit Data Pinout. An enumeration with values that depend on the
      hardware being used. This controls both the transmit pins and if
      hardware flow control is used.

      SAMD20:

      +-------+---------------+
      | Value | TX Pin        |
      +-------+---------------+
      |     0 | SERCOM_PAD[0] |
      +-------+---------------+
      |     1 | SERCOM_PAD[2] |
      +-------+---------------+

      SAMD21/DA21/R21:

      +-------+---------------+---------------+---------------+
      | Value | TX Pin        | RTS           | CTS           |
      +-------+---------------+---------------+---------------+
      |     0 | SERCOM_PAD[0] |           N/A |           N/A |
      +-------+---------------+---------------+---------------+
      |     1 | SERCOM_PAD[2] |           N/A |           N/A |
      +-------+---------------+---------------+---------------+
      |     2 | SERCOM_PAD[0] | SERCOM_PAD[2] | SERCOM_PAD[3] |
      +-------+---------------+---------------+---------------+
      |     3 | Reserved                                      |
      +-------+-----------------------------------------------+

      SAML2x/C2x:

      +-------+----------------+---------------+--------------+
      | Value | TX Pin        | RTS           | CTS           |
      +-------+---------------+---------------+---------------+
      |     0 | SERCOM_PAD[0] |           N/A |           N/A |
      +-------+---------------+---------------+---------------+
      |     1 | SERCOM_PAD[2] |           N/A |           N/A |
      +-------+---------------+---------------+---------------+
      |     2 | SERCOM_PAD[0] | SERCOM_PAD[2] | SERCOM_PAD[3] |
      +-------+---------------+---------------+---------------+
      |     3 | SERCOM_PAD[0] | SERCOM_PAD[2] |           N/A |
      +-------+---------------+---------------+---------------+

      SAMD5/E5:

      +-------+---------------+---------------+---------------+
      | Value | TX Pin        | RTS           | CTS           |
      +-------+---------------+---------------+---------------+
      |     0 | SERCOM_PAD[0] |           N/A |           N/A |
      +-------+---------------+---------------+---------------+
      |     1 | Reserved                                      |
      +-------+---------------+---------------+---------------+
      |     2 | SERCOM_PAD[0] | SERCOM_PAD[2] | SERCOM_PAD[3] |
      +-------+---------------+---------------+---------------+
      |     3 | SERCOM_PAD[0] | SERCOM_PAD[2] |           N/A |
      +-------+---------------+---------------+---------------+


  collision-detection:
    type: boolean
    description: Enable collision detection for half-duplex mode.

  dmas:
    description: |
      Optional TX & RX dma specifiers.  Each specifier will have a phandle
      reference to the dmac controller, the channel number, and peripheral
      trigger source.

      For example dmas for TX, RX on SERCOM3
         dmas = <&dmac 0 0xb>, <&dmac 0 0xa>;

  dma-names:
    description: |
      Required if the dmas property exists.  This should be "tx" and "rx"
      to match the dmas property.

      For example
         dma-names = "tx", "rx";