113 lines
3.0 KiB
YAML
113 lines
3.0 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/serial/fsl-imx-uart.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Freescale i.MX Universal Asynchronous Receiver/Transmitter (UART)
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maintainers:
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- Fabio Estevam <festevam@gmail.com>
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allOf:
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- $ref: "serial.yaml"
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- $ref: "rs485.yaml"
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properties:
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compatible:
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oneOf:
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- const: fsl,imx1-uart
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- const: fsl,imx21-uart
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- items:
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- enum:
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- fsl,imx25-uart
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- fsl,imx27-uart
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- fsl,imx31-uart
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- fsl,imx35-uart
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- fsl,imx50-uart
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- fsl,imx51-uart
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- fsl,imx53-uart
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- fsl,imx6q-uart
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- const: fsl,imx21-uart
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- items:
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- enum:
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- fsl,imx6sl-uart
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- fsl,imx6sll-uart
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- fsl,imx6sx-uart
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- const: fsl,imx6q-uart
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- const: fsl,imx21-uart
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- items:
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- enum:
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- fsl,imx6ul-uart
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- fsl,imx7d-uart
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- fsl,imx8mm-uart
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- fsl,imx8mn-uart
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- fsl,imx8mp-uart
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- fsl,imx8mq-uart
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- const: fsl,imx6q-uart
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reg:
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maxItems: 1
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interrupts:
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maxItems: 1
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fsl,dte-mode:
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$ref: /schemas/types.yaml#/definitions/flag
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description: |
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Indicate the uart works in DTE mode. The uart works in DCE mode by default.
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fsl,inverted-tx:
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$ref: /schemas/types.yaml#/definitions/flag
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description: |
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Indicate that the hardware attached to the peripheral inverts the signal
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transmitted, and that the peripheral should invert its output using the
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INVT registers.
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fsl,inverted-rx:
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$ref: /schemas/types.yaml#/definitions/flag
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description: |
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Indicate that the hardware attached to the peripheral inverts the signal
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received, and that the peripheral should invert its input using the
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INVR registers.
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fsl,dma-info:
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$ref: /schemas/types.yaml#/definitions/uint32-array
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minItems: 2
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maxItems: 2
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description: |
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First cell contains the size of DMA buffer chunks, second cell contains
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the amount of chunks used for the device. Multiplying both numbers is
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the total size of memory used for receiving data.
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When not being configured the system will use default settings, which
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are sensible for most use cases. If you need low latency processing on
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slow connections this needs to be configured appropriately.
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uart-has-rtscts: true
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rs485-rts-delay: true
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rs485-rts-active-low: true
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rs485-rx-during-tx: true
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linux,rs485-enabled-at-boot-time: true
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required:
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- compatible
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- reg
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- interrupts
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unevaluatedProperties: false
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examples:
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- |
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aliases {
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serial0 = &uart1;
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};
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uart1: serial@73fbc000 {
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compatible = "fsl,imx51-uart", "fsl,imx21-uart";
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reg = <0x73fbc000 0x4000>;
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interrupts = <31>;
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uart-has-rtscts;
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fsl,dte-mode;
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};
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