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35 lines
825 B
Markdown
35 lines
825 B
Markdown
# GPIO
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## Introduction
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This plugin sets GPIO outputs either high or low before and/or after an
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update has been deployed.
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## GUID Generation
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These device use GPIO `gpiochip_info.label` values, e.g.
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* `GPIO\ID_INT3450:00`
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## Quirk Use
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This plugin uses the following plugin-specific quirks:
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### GpioForUpdate
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The GPIO bit to set before the update is deployed e.g. `INT3450:00,SPI_MUX,high`.
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After the update has finished, the bits are returned to the default state.
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For example, to set GPIO pin 2 low for the duration of the ColorHug device update
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this could be added to the quirk file:
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[USB\VID_273F&PID_1001]
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GpioForUpdate=fake-gpio-chip,2,low
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Since: 1.7.6
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## External Interface Access
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This plugin requires ioctl `GPIO_GET_CHIPINFO_IOCTL` and `GPIO_V2_GET_LINE_IOCTL`
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access on `/dev/gpiochip*` devices.
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