0001 # SPDX-License-Identifier: GPL-2.0
0002 %YAML 1.2
0003 ---
0004 $id: http://devicetree.org/schemas/i2c/i2c-gpio.yaml#
0005 $schema: http://devicetree.org/meta-schemas/core.yaml#
0006
0007 title: Bindings for GPIO bitbanged I2C
0008
0009 maintainers:
0010 - Wolfram Sang <wsa@kernel.org>
0011
0012 allOf:
0013 - $ref: /schemas/i2c/i2c-controller.yaml#
0014
0015 properties:
0016 compatible:
0017 items:
0018 - const: i2c-gpio
0019
0020 sda-gpios:
0021 description:
0022 gpio used for the sda signal, this should be flagged as
0023 active high using open drain with (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)
0024 from <dt-bindings/gpio/gpio.h> since the signal is by definition
0025 open drain.
0026 maxItems: 1
0027
0028 scl-gpios:
0029 description:
0030 gpio used for the scl signal, this should be flagged as
0031 active high using open drain with (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)
0032 from <dt-bindings/gpio/gpio.h> since the signal is by definition
0033 open drain.
0034 maxItems: 1
0035
0036 i2c-gpio,scl-output-only:
0037 description: scl as output only
0038 type: boolean
0039
0040 i2c-gpio,delay-us:
0041 description: delay between GPIO operations (may depend on each platform)
0042
0043 i2c-gpio,timeout-ms:
0044 description: timeout to get data
0045
0046 # Deprecated properties, do not use in new device tree sources:
0047 gpios:
0048 minItems: 2
0049 maxItems: 2
0050 description: sda and scl gpio, alternative for {sda,scl}-gpios
0051
0052 i2c-gpio,sda-open-drain:
0053 type: boolean
0054 deprecated: true
0055 description: this means that something outside of our control has put
0056 the GPIO line used for SDA into open drain mode, and that something is
0057 not the GPIO chip. It is essentially an inconsistency flag.
0058
0059 i2c-gpio,scl-open-drain:
0060 type: boolean
0061 deprecated: true
0062 description: this means that something outside of our control has put the
0063 GPIO line used for SCL into open drain mode, and that something is not
0064 the GPIO chip. It is essentially an inconsistency flag.
0065
0066 required:
0067 - compatible
0068 - sda-gpios
0069 - scl-gpios
0070
0071 unevaluatedProperties: false
0072
0073 ...
