Messages in this thread | | | From | Pintu Agarwal <> | Date | Tue, 9 Jun 2020 23:06:10 +0530 | Subject | Generic way for verifying GPIO wakeup capability |
| |
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
| |