BeagleBone GPIO

[Damjan Marion]

Hi David,

GPIO driver works for 1st 32 GPIOs, and gpioctl is right tool but you 
cannot list GPIOs, you can just toggle them.
You can see list of gpios in sys/arm/ti/am335x/am335x_scm_padconf.c
and might be that you will need to change settings in sys/boot/fdt/dts/beaglebone.dts.

For a proper support gpioctl tool needs complete rewrite, as it currently 
assumes that there is no more that 32 gpios available.

Cheers,

Damjan

On Jul 19, 2012, at 6:29 PM, David Kalliecharan <davidkallie at gmail.com> wrote:

> Hi Damjan,
> 
> I am attempting to do some work on the BeagleBone and am curious about
> the GPIO driver, I was directed to you by Tim Kientzle, who has helped
> me get a working system and am going to attempt to help him in any way
> I can. I attempted to list off the available pins using the gpioctl
> command and got the error:
> 
> # gpioctl -f /dev/gpioc0 -l
> ioctl(GPIOGET): Invalid argument
> 
> Not sure if I am using the correct userland tool, as Tim informed me
> that there was a tool to use and a driver you were working on and had
> assumed it to be 'gpioctl'. If I can help with testing or anything let
> me know (I am trying to get my feet wet with this stuff), again thanks
> for taking the time to help, I really appreciate it!
> 
> Cheers,
> 
> Dave