On Wed, Oct 08, 2014 at 10:34:38AM +0200, Loic Poulain wrote:
> Some GPIO based rfkill devices can wake their host up from suspend by
> toggling an input (from the host perspective) GPIO.
> This patch adds a generic support for that feature by registering a
> threaded interrupt routine and thus setting the corresponding GPIO as a
> wake up source.
>
> Signed-off-by: Loic Poulain <loic.poulain@xxxxxxxxx>
> ---
> net/rfkill/rfkill-gpio.c | 49 ++++++++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 49 insertions(+)
To continue my previous answer, for this you could have the following
_DSD..
Name (_DSD, Package ()
{
ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
Package () {
Package () {"host_wake-gpio", Package () {^BTH1, 0, 0, 0}},
Package () {"reset-gpio", Package () {^BTH1, 1, 0, 0}},
Package () {"shutdown-gpio", Package () {^BTH1, 2, 0, 0}},
}
})
And in the driver you can then request it without caring about the
index..
...
gpio = devm_gpiod_get_index(dev, "host_wake", 3);
if (!IS_ERR(gpio)) {
ret = gpiod_direction_input(gpio);
if (ret)
return ret;
rfkill->irq = gpiod_to_irq(gpio);
...
Actually, we could just use devm_gpiod_get instead of
devm_gpiod_get_index in this case.
Cheers,
--
heikki
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