Re: GPIO on SUNXI H3

[Jared McNeill <jmcneill%invisible.ca@localhost>]

Hi Sascha --

I added support for this yesterday morning. Are you running at least r1.11 
of the SUNXI kernel config?

Also because of some (annoying IMHO) securelevel restrictions you need to 
configure the pins before securelevel is raised to 1.

Put this in /etc/gpio.conf:
  gpio0 15 set out error_led

And in /etc/rc.conf:
  gpio=YES

Then reboot.

Hope this helps!
Jared


On Fri, 7 Jul 2017, wilde%sha-bang.de@localhost wrote:

> Hello Jared,
>
> I see that there is an sunxi_gpio which is build, too with the SUNXI
> kernel, but the gpio seems not to be initialized with the kernel, i see
> nothing matching in the boot messages and gpioctl doesn't work:
>
>    # gpioctl gpio0 15 set out error_led
>    gpioctl: /dev/gpio0: Device not configured
>
> is this a known issue, or a problem with my dtb?
>
> cheers
> sascha