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Raspberrypi-gpioshutdown
Jul 20, 2023
Kernel driver to reset GPIO pins on shutdown for Raspberry Pi
GPIO ‘shutdown’ Kernel module for the Raspberry Pi Model 1B and Model 2
The purpose of this module is to shut down all GPIOs prior to powering off or rebooting a Raspberry Pi.
The main reason for this is due to there being no real indicators that the shutdown process has completed. By doing a shutdown of all of the GPIOs such that they act like inputs without pullup resistors, you can detect the ‘high impedence’ state either with an LED or using some kind of exernal board such as an ‘ATX Raspi’ board. An external board could then detect the shutdown, and power off the Raspberry Pi safely, and you won’t have to fix the file system due to problems caused by powering it down before it’s safe to do so.
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