GPIO interrupts on Carambola2

[Luiz Otavio O Souza]

On 7 May 2014 16:48, Sebastian Zietz wrote:
> Hi all,
>
> since I am not much into device driver programming jet I hope you can help me with my problem. I have a hardware button on GPIO pin 22 and can’t generate interrupts on it. In sys/mips/atheros/ar71xx_gpio.c I’d like to do something like:
>
> 331 static void
> 332 ar71xx_gpio_intr(void *arg)
> 333 {
> 334         struct ar71xx_gpio_softc *sc = arg;
> 335         GPIO_LOCK(sc);
> 336         /* TODO: something useful */
> 337         devctl_notify("GPIO", "pin22", "notify", NULL);
> 338         GPIO_UNLOCK(sc);
> 339 }
>
>
> To get it working I tried this without success:
>
> 410         /* Configure all pins as input */
> 411         /* disable interrupts for all pins */
> 412         GPIO_WRITE(sc, AR71XX_GPIO_INT_MASK, 0);
> 413         GPIO_WRITE(sc, AR71XX_GPIO_INT_MASK, (1 << 22));
>
>
> I didn’t managed to come up with pin 22 as input either. I am thankful for any help!

Sebastian,

I'm adding GPIO interrupt support and ar71xx is one of my reference
platforms so this should be working soon.

I'm using kqueue to delivery the interrupt notification to userland,
but eventually i'll also support devctl_notify().

The patch(es) should be posted soon now.

Luiz