Re: [PATCH v9] gpio: add a driver for Synopsys DesignWare APB GPIO

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Hi!

On Thu, Jan 30, 2014 at 01:40:04PM -0600, delicious quinoa wrote:
> On Thu, Dec 12, 2013 at 3:08 AM, Steffen Trumtrar
> <s.trumtrar@xxxxxxxxxxxxxx> wrote:
> 
> > Second: The interrupt is registered as "GIC 37", which is a real interrupt on
> > the Socfpga. I would expect it to be marked as "GPIO 2xx" (or something in that
> > range). The interrupt from the gpiochip itself isn't registered at all ?!
> 
> Hi Stephen,
> 
> Did you export the gpio lines and set the edge in sysfs?  Because the
> interrupts aren't allocated otherwise.
> 
> For instance:
> 
> root@socfpga_cyclone5:~# echo 195 > /sys/class/gpio/export
> root@socfpga_cyclone5:~# echo rising > /sys/class/gpio/gpio195/edge
> 
> Now I can see a pretty nicely named interrupt in /proc/interrupts:
> 
> 256:          0          0  gpio-dwapb  24  gpiolib
> 

I didn't try that and I think this behaviour is pretty uncommon.
This should be fixed in the driver. I never wrote a gpiochip-driver,
so I don't know what is missing, but maybe just some functioncall ?!
All other drivers I came across have that entry from probing without
any fiddling.

Thanks,
Steffen

-- 
Pengutronix e.K.                           |                             |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |
--
To unsubscribe from this list: send the line "unsubscribe linux-doc" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [Kernel Newbies]     [Security]     [Netfilter]     [Bugtraq]     [Linux FS]     [Yosemite Forum]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Samba]     [Video 4 Linux]     [Device Mapper]     [Linux Resources]

  Powered by Linux