How to identify a gpio-keys-polled input device from userspace?

Christian Gmeiner <christian.gmeiner@xxxxxxxxx> · Wed, 2 Jan 2013 11:43:55 +0100

Hi all...

I am running in a small problem right now. I need to identify the
reset button from userspace on different boards.

I thought that I could iterate over all /dev/input/eventX devices and
use some ioctl magic to get the correct one.

        char name[256] = "Unknown";
        ioctl(inputdev->handle(), EVIOCGNAME(sizeof(name)), name);

Returns gpio-keys-polled... looks fine, but I have more then 1 button.

In my out-of-tree platform-glue-driver I have this:

static struct gpio_keys_button bpc600_gpio_keys[] = {
        {
                .code = BTN_EXTRA, /* See include/linux/input.h */
                .gpio = 12,
                .active_low = 1,
                .desc = "reset",
                .wakeup = 0,
        },
};

Is there a way to get desc value from userspace?

thanks
--
Christian Gmeiner, MSc
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