1*4882a593Smuzhiyun# SPDX-License-Identifier: GPL-2.0 2*4882a593Smuzhiyun%YAML 1.2 3*4882a593Smuzhiyun--- 4*4882a593Smuzhiyun$id: http://devicetree.org/schemas/i2c/i2c-gpio.yaml# 5*4882a593Smuzhiyun$schema: http://devicetree.org/meta-schemas/core.yaml# 6*4882a593Smuzhiyun 7*4882a593Smuzhiyuntitle: Bindings for GPIO bitbanged I2C 8*4882a593Smuzhiyun 9*4882a593Smuzhiyunmaintainers: 10*4882a593Smuzhiyun - Wolfram Sang <wolfram@the-dreams.de> 11*4882a593Smuzhiyun 12*4882a593SmuzhiyunallOf: 13*4882a593Smuzhiyun - $ref: /schemas/i2c/i2c-controller.yaml# 14*4882a593Smuzhiyun 15*4882a593Smuzhiyunproperties: 16*4882a593Smuzhiyun compatible: 17*4882a593Smuzhiyun items: 18*4882a593Smuzhiyun - const: i2c-gpio 19*4882a593Smuzhiyun 20*4882a593Smuzhiyun sda-gpios: 21*4882a593Smuzhiyun description: 22*4882a593Smuzhiyun gpio used for the sda signal, this should be flagged as 23*4882a593Smuzhiyun active high using open drain with (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN) 24*4882a593Smuzhiyun from <dt-bindings/gpio/gpio.h> since the signal is by definition 25*4882a593Smuzhiyun open drain. 26*4882a593Smuzhiyun maxItems: 1 27*4882a593Smuzhiyun 28*4882a593Smuzhiyun scl-gpios: 29*4882a593Smuzhiyun description: 30*4882a593Smuzhiyun gpio used for the scl signal, this should be flagged as 31*4882a593Smuzhiyun active high using open drain with (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN) 32*4882a593Smuzhiyun from <dt-bindings/gpio/gpio.h> since the signal is by definition 33*4882a593Smuzhiyun open drain. 34*4882a593Smuzhiyun maxItems: 1 35*4882a593Smuzhiyun 36*4882a593Smuzhiyun i2c-gpio,scl-output-only: 37*4882a593Smuzhiyun description: scl as output only 38*4882a593Smuzhiyun type: boolean 39*4882a593Smuzhiyun 40*4882a593Smuzhiyun i2c-gpio,delay-us: 41*4882a593Smuzhiyun description: delay between GPIO operations (may depend on each platform) 42*4882a593Smuzhiyun $ref: /schemas/types.yaml#/definitions/uint32 43*4882a593Smuzhiyun 44*4882a593Smuzhiyun i2c-gpio,timeout-ms: 45*4882a593Smuzhiyun description: timeout to get data 46*4882a593Smuzhiyun $ref: /schemas/types.yaml#/definitions/uint32 47*4882a593Smuzhiyun 48*4882a593Smuzhiyun # Deprecated properties, do not use in new device tree sources: 49*4882a593Smuzhiyun gpios: 50*4882a593Smuzhiyun minItems: 2 51*4882a593Smuzhiyun maxItems: 2 52*4882a593Smuzhiyun description: sda and scl gpio, alternative for {sda,scl}-gpios 53*4882a593Smuzhiyun 54*4882a593Smuzhiyun i2c-gpio,sda-open-drain: 55*4882a593Smuzhiyun type: boolean 56*4882a593Smuzhiyun deprecated: true 57*4882a593Smuzhiyun description: this means that something outside of our control has put 58*4882a593Smuzhiyun the GPIO line used for SDA into open drain mode, and that something is 59*4882a593Smuzhiyun not the GPIO chip. It is essentially an inconsistency flag. 60*4882a593Smuzhiyun 61*4882a593Smuzhiyun i2c-gpio,scl-open-drain: 62*4882a593Smuzhiyun type: boolean 63*4882a593Smuzhiyun deprecated: true 64*4882a593Smuzhiyun description: this means that something outside of our control has put the 65*4882a593Smuzhiyun GPIO line used for SCL into open drain mode, and that something is not 66*4882a593Smuzhiyun the GPIO chip. It is essentially an inconsistency flag. 67*4882a593Smuzhiyun 68*4882a593Smuzhiyunrequired: 69*4882a593Smuzhiyun - compatible 70*4882a593Smuzhiyun - sda-gpios 71*4882a593Smuzhiyun - scl-gpios 72*4882a593Smuzhiyun 73*4882a593SmuzhiyununevaluatedProperties: false 74*4882a593Smuzhiyun 75*4882a593Smuzhiyun... 76