i2c-gpio.yaml

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    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 
    7 title: Bindings for GPIO bitbanged I2C
    8 
    9 maintainers:
   10   - Wolfram Sang <wsa@kernel.org>
   11 
   12 allOf:
   13   - $ref: /schemas/i2c/i2c-controller.yaml#
   14 
   15 properties:
   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 
   66 required:
   67   - compatible
   68   - sda-gpios
   69   - scl-gpios
   70 
   71 unevaluatedProperties: false
   72 
   73 ...

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FreeBSD/Linux Kernel Cross Reference sys/contrib/device-tree/Bindings/i2c/i2c-gpio.yaml

FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/i2c/i2c-gpio.yaml