Documentation/devicetree/bindings/serial/fsl-imx-uart.yaml

   1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
   2 %YAML 1.2
   3 ---
   4 $id: http://devicetree.org/schemas/serial/fsl-imx-uart.yaml#
   5 $schema: http://devicetree.org/meta-schemas/core.yaml#
   6
   7 title: Freescale i.MX Universal Asynchronous Receiver/Transmitter (UART)
   8
   9 maintainers:
  10   - Fabio Estevam <fabio.estevam@nxp.com>
  11
  12 allOf:
  13   - $ref: "serial.yaml"
  14   - $ref: "rs485.yaml"
  15
  16 properties:
  17   compatible:
  18     oneOf:
  19       - const: fsl,imx1-uart
  20       - const: fsl,imx21-uart
  21       - items:
  22           - enum:
  23               - fsl,imx25-uart
  24               - fsl,imx27-uart
  25               - fsl,imx31-uart
  26               - fsl,imx35-uart
  27               - fsl,imx50-uart
  28               - fsl,imx51-uart
  29               - fsl,imx53-uart
  30               - fsl,imx6q-uart
  31           - const: fsl,imx21-uart
  32       - items:
  33           - enum:
  34               - fsl,imx6sl-uart
  35               - fsl,imx6sll-uart
  36               - fsl,imx6sx-uart
  37           - const: fsl,imx6q-uart
  38           - const: fsl,imx21-uart
  39       - items:
  40           - enum:
  41               - fsl,imx6ul-uart
  42               - fsl,imx7d-uart
  43               - fsl,imx8mm-uart
  44               - fsl,imx8mn-uart
  45               - fsl,imx8mp-uart
  46               - fsl,imx8mq-uart
  47           - const: fsl,imx6q-uart
  48
  49   reg:
  50     maxItems: 1
  51
  52   interrupts:
  53     maxItems: 1
  54
  55   fsl,dte-mode:
  56     $ref: /schemas/types.yaml#/definitions/flag
  57     description: |
  58       Indicate the uart works in DTE mode. The uart works in DCE mode by default.
  59
  60   fsl,inverted-tx:
  61     $ref: /schemas/types.yaml#/definitions/flag
  62     description: |
  63       Indicate that the hardware attached to the peripheral inverts the signal
  64       transmitted, and that the peripheral should invert its output using the
  65       INVT registers.
  66
  67   fsl,inverted-rx:
  68     $ref: /schemas/types.yaml#/definitions/flag
  69     description: |
  70       Indicate that the hardware attached to the peripheral inverts the signal
  71       received, and that the peripheral should invert its input using the
  72       INVR registers.
  73
  74   uart-has-rtscts: true
  75
  76   rs485-rts-delay: true
  77   rs485-rts-active-low: true
  78   rs485-rx-during-tx: true
  79   linux,rs485-enabled-at-boot-time: true
  80
  81 required:
  82   - compatible
  83   - reg
  84   - interrupts
  85
  86 unevaluatedProperties: false
  87
  88 examples:
  89   - |
  90     aliases {
  91         serial0 = &uart1;
  92     };
  93
  94     uart1: serial@73fbc000 {
  95         compatible = "fsl,imx51-uart", "fsl,imx21-uart";
  96         reg = <0x73fbc000 0x4000>;
  97         interrupts = <31>;
  98         uart-has-rtscts;
  99         fsl,dte-mode;
 100     };