# Re: \[PATCH RESEND v3\] gpio: lib-sysfs: Add 'wakeup' attribute

- From: Sören Brinkmann \<hidden\>
- Date: 2015-01-09 15:24:17 
- List: linux-api
- Page: https://ratatoskr.run/linux-api/2015/01/4406329
- Thread: https://ratatoskr.run/linux-api/2015/01/4402991/t.md

```text
On Fri, 2015-01-09 at 10:32AM +0100, Linus Walleij wrote:
> On Mon, Jan 5, 2015 at 7:16 PM, Soren Brinkmann
> [ref] wrote:
> 
> > Add an attribute 'wakeup' to the GPIO sysfs interface which allows
> > marking/unmarking a GPIO as wake IRQ.
> > The file 'wakeup' is created in each exported GPIOs directory, if an IRQ
> > is associated with that GPIO and the irqchip implements set_wake().
> > Writing 'enabled' to that file will enable wake for that GPIO, while
> > writing 'disabled' will disable wake.
> > Reading that file will return either 'disabled' or 'enabled' depening on
> > the currently set flag for the GPIO's IRQ.
> >
> > Signed-off-by: Soren Brinkmann <redacted>
> > Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
> > ---
> > v3:
> >  - add documentation
> > v2:
> >  - fix error path to unlock mutex before return
> 
> Finally applied for v3.20.
> 
> Sorry for being a bit conservative and picky at times...

Thank you.

	Sören
```