sysfs gpio deprecated?

[Fred Kerr]

Hi, I've started looking at the sysfs gpio interface and saw some notes that it's considered obsolete and deprecated. I'm looking for a good pointer to the ABI (?) character driver interface for gpio. I'll probably find one right after posting this. :)

In case I'm not using the right terminology, the sysfs interface is where you go to /sys/class/gpio and echo ## > export to get gpio pins exported that you can then interact with?

Thanks,

Fred

[Drew Fustini]

The sysfs gpio ABI will be removed from the Linux kernel in 2020.  The new ABI uses a character device to represent each gpiochip.

libgpiod started by Bartosz Golaszewski is a good way for userspace code to use the the new ABI:

https://git.kernel.org/pub/scm/libs/libgpiod/libgpiod.git/about/

Regards,

Drew

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[allsey]

For any one else who finds this thread and wants to know more, there is a presentation discussion the new interface and libgpiod at: https://fosdem.org/2018/schedule/event/new_gpio_interface_for_linux/