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73 lines
1.9 KiB
73 lines
1.9 KiB
# SPDX-License-Identifier: GPL-2.0 |
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%YAML 1.2 |
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--- |
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$id: http://devicetree.org/schemas/i2c/i2c-gpio.yaml# |
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$schema: http://devicetree.org/meta-schemas/core.yaml# |
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title: Bindings for GPIO bitbanged I2C |
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maintainers: |
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- Wolfram Sang <[email protected]> |
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allOf: |
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- $ref: /schemas/i2c/i2c-controller.yaml# |
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properties: |
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compatible: |
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items: |
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- const: i2c-gpio |
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sda-gpios: |
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description: |
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gpio used for the sda signal, this should be flagged as |
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active high using open drain with (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN) |
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from <dt-bindings/gpio/gpio.h> since the signal is by definition |
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open drain. |
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maxItems: 1 |
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scl-gpios: |
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description: |
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gpio used for the scl signal, this should be flagged as |
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active high using open drain with (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN) |
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from <dt-bindings/gpio/gpio.h> since the signal is by definition |
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open drain. |
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maxItems: 1 |
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i2c-gpio,scl-output-only: |
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description: scl as output only |
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type: boolean |
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i2c-gpio,delay-us: |
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description: delay between GPIO operations (may depend on each platform) |
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i2c-gpio,timeout-ms: |
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description: timeout to get data |
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# Deprecated properties, do not use in new device tree sources: |
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gpios: |
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minItems: 2 |
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maxItems: 2 |
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description: sda and scl gpio, alternative for {sda,scl}-gpios |
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i2c-gpio,sda-open-drain: |
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type: boolean |
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deprecated: true |
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description: this means that something outside of our control has put |
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the GPIO line used for SDA into open drain mode, and that something is |
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not the GPIO chip. It is essentially an inconsistency flag. |
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i2c-gpio,scl-open-drain: |
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type: boolean |
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deprecated: true |
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description: this means that something outside of our control has put the |
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GPIO line used for SCL into open drain mode, and that something is not |
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the GPIO chip. It is essentially an inconsistency flag. |
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required: |
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- compatible |
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- sda-gpios |
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- scl-gpios |
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unevaluatedProperties: false |
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...
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