xref: /linux/Documentation/devicetree/bindings/serial/rs485.yaml (revision ff36e78fdb251b9fa65028554689806961e011eb) 
1# SPDX-License-Identifier: GPL-2.0
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/serial/rs485.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: RS485 serial communications Bindings
8
9description: The RTS signal is capable of automatically controlling
10             line direction for the built-in half-duplex mode.
11             The properties described hereafter shall be given to a
12             half-duplex capable UART node.
13
14maintainers:
15  -  Rob Herring <robh@kernel.org>
16
17properties:
18  rs485-rts-delay:
19    description: prop-encoded-array <a b>
20    allOf:
21      - $ref: /schemas/types.yaml#/definitions/uint32-array
22      - items:
23          items:
24            - description:
25                Delay between rts signal and beginning of data sent in milliseconds.
26                It corresponds to the delay before sending data.
27              default: 0
28              maximum: 1000
29            - description:
30                Delay between end of data sent and rts signal in milliseconds.
31                It corresponds to the delay after sending data and actual release of the line.
32              default: 0
33              maximum: 1000
34
35  rs485-rts-active-low:
36    description: drive RTS low when sending (default is high).
37    $ref: /schemas/types.yaml#/definitions/flag
38
39  linux,rs485-enabled-at-boot-time:
40    description: enables the rs485 feature at boot time. It can be disabled later with proper ioctl.
41    $ref: /schemas/types.yaml#/definitions/flag
42
43  rs485-rx-during-tx:
44   description: enables the receiving of data even while sending data.
45   $ref: /schemas/types.yaml#/definitions/flag
46