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gpio

README.md

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---
title: Plugin: GPIO
---

Introduction

This plugin sets GPIO outputs either high or low before and/or after an update has been deployed.

GUID Generation

These device use GPIO gpiochip_info.label values, e.g.

  • GPIO\ID_INT3450:00

Quirk Use

This plugin uses the following plugin-specific quirks:

GpioForUpdate

The GPIO bit to set before the update is deployed e.g. INT3450:00,SPI_MUX,high. After the update has finished, the bits are returned to the default state.

For example, to set GPIO pin 2 low for the duration of the ColorHug device update this could be added to the quirk file:

[USB\VID_273F&PID_1001]
GpioForUpdate=fake-gpio-chip,2,low

Since: 1.7.6

External Interface Access

This plugin requires ioctl GPIO_GET_CHIPINFO_IOCTL and GPIO_V2_GET_LINE_IOCTL access on /dev/gpiochip* devices.

Version Considerations

This plugin has been available since fwupd version 1.7.6.