Hi All, I am looking for ways to wakeup any devices (from sleep) using any arbitrary gpio wakeup method in a generic way (either from user space or kernel space) that should work on any kernel version (starting from 4.14 onwards). What are the options available right now ? I wanted to experiment with all of them and decide which is best for us. Is /sys/class/gpio/ method still valid with the latest kernel ? Or is there any other method to do it from user space ? One option I know is to use enable/disable_irq_wake() API from kernel driver suspend/resume path. Just like this: https://lwn.net/Articles/569027/ But this requires an additional kernel driver and device-tree changes for each gpio wakeup, which the end-user needs to implement on their own. Is there any other existing generic mechanism? Thanks, Pintu