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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: | |
98a47999 | 10 | - Wolfram Sang <wsa@kernel.org> |
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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) | |
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42 | |
43 | i2c-gpio,timeout-ms: | |
44 | description: timeout to get data | |
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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: | |
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53 | type: boolean |
54 | deprecated: true | |
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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: | |
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60 | type: boolean |
61 | deprecated: true | |
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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 | ||
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71 | unevaluatedProperties: false |
72 | ||
0175ce4a | 73 | ... |