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: GPIO bitbanged I2C 8 9maintainers: 10 - Wolfram Sang <wsa@kernel.org> 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 43 i2c-gpio,timeout-ms: 44 description: timeout to get data 45 46 # Deprecated properties, do not use in new device tree sources: 47 gpios: 48 minItems: 2 49 maxItems: 2 50 description: sda and scl gpio, alternative for {sda,scl}-gpios 51 52 i2c-gpio,sda-open-drain: 53 type: boolean 54 deprecated: true 55 description: this means that something outside of our control has put 56 the GPIO line used for SDA into open drain mode, and that something is 57 not the GPIO chip. It is essentially an inconsistency flag. 58 59 i2c-gpio,scl-open-drain: 60 type: boolean 61 deprecated: true 62 description: this means that something outside of our control has put the 63 GPIO line used for SCL into open drain mode, and that something is not 64 the GPIO chip. It is essentially an inconsistency flag. 65 66required: 67 - compatible 68 - sda-gpios 69 - scl-gpios 70 71unevaluatedProperties: false 72 73... 74