72 lines
1.9 KiB
YAML
72 lines
1.9 KiB
YAML
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# 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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$id: "http://devicetree.org/schemas/serial/serial.yaml#"
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$schema: "http://devicetree.org/meta-schemas/core.yaml#"
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title: Serial Interface Generic DT Bindings
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maintainers:
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- Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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description:
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This document lists a set of generic properties for describing UARTs in a
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device tree. Whether these properties apply to a particular device depends
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on the DT bindings for the actual device.
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properties:
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$nodename:
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pattern: "^serial(@.*)?$"
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cts-gpios:
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maxItems: 1
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description:
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Must contain a GPIO specifier, referring to the GPIO pin to be used as
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the UART's CTS line.
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dcd-gpios:
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maxItems: 1
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description:
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Must contain a GPIO specifier, referring to the GPIO pin to be used as
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the UART's DCD line.
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dsr-gpios:
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maxItems: 1
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description:
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Must contain a GPIO specifier, referring to the GPIO pin to be used as
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the UART's DSR line.
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dtr-gpios:
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maxItems: 1
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description:
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Must contain a GPIO specifier, referring to the GPIO pin to be used as
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the UART's DTR line.
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rng-gpios:
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maxItems: 1
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description:
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Must contain a GPIO specifier, referring to the GPIO pin to be used as
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the UART's RNG line.
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rts-gpios:
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maxItems: 1
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description:
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Must contain a GPIO specifier, referring to the GPIO pin to be used as
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the UART's RTS line.
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uart-has-rtscts:
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$ref: /schemas/types.yaml#/definitions/flag
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description:
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The presence of this property indicates that the UART has dedicated lines
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for RTS/CTS hardware flow control, and that they are available for use
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(wired and enabled by pinmux configuration). This depends on both the
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UART hardware and the board wiring.
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if:
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required:
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- uart-has-rtscts
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then:
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properties:
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cts-gpios: false
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rts-gpios: false
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