1d50f974cSBenjamin Gaignard# SPDX-License-Identifier: GPL-2.0 2d50f974cSBenjamin Gaignard%YAML 1.2 3d50f974cSBenjamin Gaignard--- 4d50f974cSBenjamin Gaignard$id: http://devicetree.org/schemas/serial/rs485.yaml# 5d50f974cSBenjamin Gaignard$schema: http://devicetree.org/meta-schemas/core.yaml# 6d50f974cSBenjamin Gaignard 7d50f974cSBenjamin Gaignardtitle: RS485 serial communications Bindings 8d50f974cSBenjamin Gaignard 99f60a65bSRob Herringdescription: The RTS signal is capable of automatically controlling line 109f60a65bSRob Herring direction for the built-in half-duplex mode. The properties described 119f60a65bSRob Herring hereafter shall be given to a half-duplex capable UART node. 12d50f974cSBenjamin Gaignard 13d50f974cSBenjamin Gaignardmaintainers: 14d50f974cSBenjamin Gaignard - Rob Herring <robh@kernel.org> 15d50f974cSBenjamin Gaignard 16d50f974cSBenjamin Gaignardproperties: 17d50f974cSBenjamin Gaignard rs485-rts-delay: 18d50f974cSBenjamin Gaignard description: prop-encoded-array <a b> 193d21a460SRob Herring $ref: /schemas/types.yaml#/definitions/uint32-array 20d50f974cSBenjamin Gaignard items: 213d21a460SRob Herring items: 223d21a460SRob Herring - description: Delay between rts signal and beginning of data sent in 233d21a460SRob Herring milliseconds. It corresponds to the delay before sending data. 24d50f974cSBenjamin Gaignard default: 0 25d50f974cSBenjamin Gaignard maximum: 1000 263d21a460SRob Herring - description: Delay between end of data sent and rts signal in milliseconds. 273d21a460SRob Herring It corresponds to the delay after sending data and actual release 283d21a460SRob Herring of the line. 29d50f974cSBenjamin Gaignard default: 0 30d50f974cSBenjamin Gaignard maximum: 1000 31d50f974cSBenjamin Gaignard 32d50f974cSBenjamin Gaignard rs485-rts-active-low: 33d50f974cSBenjamin Gaignard description: drive RTS low when sending (default is high). 34d50f974cSBenjamin Gaignard $ref: /schemas/types.yaml#/definitions/flag 35d50f974cSBenjamin Gaignard 36*103dcf2eSIlpo Järvinen rs485-rx-active-high: 37*103dcf2eSIlpo Järvinen description: Polarity of receiver enable signal (when separate from RTS). 38*103dcf2eSIlpo Järvinen True indicates active high (default is low). 39*103dcf2eSIlpo Järvinen $ref: /schemas/types.yaml#/definitions/flag 40*103dcf2eSIlpo Järvinen 41d50f974cSBenjamin Gaignard linux,rs485-enabled-at-boot-time: 429f60a65bSRob Herring description: enables the rs485 feature at boot time. It can be disabled 439f60a65bSRob Herring later with proper ioctl. 44d50f974cSBenjamin Gaignard $ref: /schemas/types.yaml#/definitions/flag 45d50f974cSBenjamin Gaignard 46d50f974cSBenjamin Gaignard rs485-rx-during-tx: 47d50f974cSBenjamin Gaignard description: enables the receiving of data even while sending data. 48d50f974cSBenjamin Gaignard $ref: /schemas/types.yaml#/definitions/flag 4901c38ecfSLukas Wunner 5001c38ecfSLukas Wunner rs485-term-gpios: 5101c38ecfSLukas Wunner description: GPIO pin to enable RS485 bus termination. 5201c38ecfSLukas Wunner maxItems: 1 536a0e321eSRob Herring 546a0e321eSRob HerringadditionalProperties: true 556a0e321eSRob Herring 569f60a65bSRob Herring... 57