what's the difference bewteen using /sys/class/gpio and gpio_key driver

henryyao · 08-22-2013, 03:27 PM

I'm wondering why do we need the gpio_key driver when everything about gpio can be done by accessing /sys/class/gpio?

smallpond · 08-23-2013, 08:23 AM

The driver calls won't change but /sys/class is not guaranteed to stay the same for different kernel revs.

henryyao · 08-23-2013, 08:27 AM

Quote:

Originally Posted by smallpond

The driver calls won't change but /sys/class is not guaranteed to stay the same for different kernel revs.

That make sense, thanks.