Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
66 lines
2.1 KiB
YAML
66 lines
2.1 KiB
YAML
# SPDX-License-Identifier: GPL-2.0
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/serial/rs485.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: RS485 serial communications
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description: The RTS signal is capable of automatically controlling line
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direction for the built-in half-duplex mode. The properties described
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hereafter shall be given to a half-duplex capable UART node.
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maintainers:
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- Rob Herring <robh@kernel.org>
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properties:
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rs485-rts-delay:
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description: prop-encoded-array <a b>
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$ref: /schemas/types.yaml#/definitions/uint32-array
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items:
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- description: Delay between rts signal and beginning of data sent in
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milliseconds. It corresponds to the delay before sending data.
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default: 0
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maximum: 100
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- description: Delay between end of data sent and rts signal in milliseconds.
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It corresponds to the delay after sending data and actual release
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of the line.
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default: 0
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maximum: 100
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rs485-rts-active-high:
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description: drive RTS high when sending (this is the default).
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$ref: /schemas/types.yaml#/definitions/flag
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rs485-rts-active-low:
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description: drive RTS low when sending (default is high).
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$ref: /schemas/types.yaml#/definitions/flag
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rs485-rx-active-high:
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description: Polarity of receiver enable signal (when separate from RTS).
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True indicates active high (default is low).
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$ref: /schemas/types.yaml#/definitions/flag
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linux,rs485-enabled-at-boot-time:
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description: enables the rs485 feature at boot time. It can be disabled
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later with proper ioctl.
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$ref: /schemas/types.yaml#/definitions/flag
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rs485-rx-during-tx:
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description: enables the receiving of data even while sending data.
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$ref: /schemas/types.yaml#/definitions/flag
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rs485-term-gpios:
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description: GPIO pin to enable RS485 bus termination.
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maxItems: 1
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rs485-rx-during-tx-gpios:
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description: Output GPIO pin that sets the state of rs485-rx-during-tx. This
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signal can be used to control the RX part of an RS485 transceiver. Thereby
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the active state enables RX during TX.
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maxItems: 1
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additionalProperties: true
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...
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