tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 # Generate a warning if present
56 not: 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 # Generate a warning if present
63 not: 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
73...