1# SPDX-License-Identifier: GPL-2.0 2%YAML 1.2 3--- 4$id: http://devicetree.org/schemas/i2c/i2c-gpio.yaml# 5$schema: http://devicetree.org/meta-schemas/core.yaml# 6 7title: Bindings for GPIO bitbanged I2C 8 9maintainers: 10 - Wolfram Sang <wolfram@the-dreams.de> 11 12allOf: 13 - $ref: /schemas/i2c/i2c-controller.yaml# 14 15properties: 16 compatible: 17 items: 18 - const: i2c-gpio 19 20 sda-gpios: 21 description: 22 gpio used for the sda signal, this should be flagged as 23 active high using open drain with (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN) 24 from <dt-bindings/gpio/gpio.h> since the signal is by definition 25 open drain. 26 maxItems: 1 27 28 scl-gpios: 29 description: 30 gpio used for the scl signal, this should be flagged as 31 active high using open drain with (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN) 32 from <dt-bindings/gpio/gpio.h> since the signal is by definition 33 open drain. 34 maxItems: 1 35 36 i2c-gpio,scl-output-only: 37 description: scl as output only 38 type: boolean 39 40 i2c-gpio,delay-us: 41 description: delay between GPIO operations (may depend on each platform) 42 $ref: /schemas/types.yaml#/definitions/uint32 43 44 i2c-gpio,timeout-ms: 45 description: timeout to get data 46 $ref: /schemas/types.yaml#/definitions/uint32 47 48 # Deprecated properties, do not use in new device tree sources: 49 gpios: 50 minItems: 2 51 maxItems: 2 52 description: sda and scl gpio, alternative for {sda,scl}-gpios 53 54 i2c-gpio,sda-open-drain: 55 type: boolean 56 deprecated: true 57 description: this means that something outside of our control has put 58 the GPIO line used for SDA into open drain mode, and that something is 59 not the GPIO chip. It is essentially an inconsistency flag. 60 61 i2c-gpio,scl-open-drain: 62 type: boolean 63 deprecated: true 64 description: this means that something outside of our control has put the 65 GPIO line used for SCL into open drain mode, and that something is not 66 the GPIO chip. It is essentially an inconsistency flag. 67 68required: 69 - compatible 70 - sda-gpios 71 - scl-gpios 72 73unevaluatedProperties: false 74 75... 76