From: Pintu Agarwal <pintu.ping@gmail.com>
To: Kernelnewbies <kernelnewbies@kernelnewbies.org>,
open list <linux-kernel@vger.kernel.org>,
linux-pm@vger.kernel.org,
"moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE"
<linux-arm-kernel@lists.infradead.org>,
linux-gpio@vger.kernel.org, zonque@gmail.com
Subject: Generic way for verifying GPIO wakeup capability
Date: Tue, 9 Jun 2020 23:06:10 +0530 [thread overview]
Message-ID: <CAOuPNLj4m_jvs90YpAq5r4gAP9o8Y1Uck3HN+MbsTPb3zP=4eA@mail.gmail.com> (raw)
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
next reply other threads:[~2020-06-09 17:36 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-09 17:36 Pintu Agarwal [this message]
2020-06-10 17:58 ` Generic way for verifying GPIO wakeup capability Pintu Agarwal
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