fsl-imx-uart.yaml

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    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 <festevam@gmail.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   fsl,dma-info:
   75     $ref: /schemas/types.yaml#/definitions/uint32-array
   76     minItems: 2
   77     maxItems: 2
   78     description: |
   79       First cell contains the size of DMA buffer chunks, second cell contains
   80       the amount of chunks used for the device. Multiplying both numbers is
   81       the total size of memory used for receiving data.
   82       When not being configured the system will use default settings, which
   83       are sensible for most use cases. If you need low latency processing on
   84       slow connections this needs to be configured appropriately.
   85 
   86   uart-has-rtscts: true
   87 
   88   rs485-rts-delay: true
   89   rs485-rts-active-low: true
   90   rs485-rx-during-tx: true
   91   linux,rs485-enabled-at-boot-time: true
   92 
   93 required:
   94   - compatible
   95   - reg
   96   - interrupts
   97 
   98 unevaluatedProperties: false
   99 
  100 examples:
  101   - |
  102     aliases {
  103         serial0 = &uart1;
  104     };
  105 
  106     uart1: serial@73fbc000 {
  107         compatible = "fsl,imx51-uart", "fsl,imx21-uart";
  108         reg = <0x73fbc000 0x4000>;
  109         interrupts = <31>;
  110         uart-has-rtscts;
  111         fsl,dte-mode;
  112     };

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FreeBSD/Linux Kernel Cross Reference sys/contrib/device-tree/Bindings/serial/fsl-imx-uart.yaml

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sys/contrib/device-tree/Bindings/serial/fsl-imx-uart.yaml