On 05/12/14 10:54, bruce bushby wrote: > Hi > > I've been using the Olimex A20-SOM and having a lot of success using the > mainline kernel....so far everything just works so a big thank you to all > the contributors!! > > One area I'm struggling with is "gpio" I see there are various patches > about:
mainline != 3.4.x don't confuse them for mainline see: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/drivers/pinctrl/sunxi/pinctrl-sunxi.c and for how to use them from userspace https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/Documentation/gpio/sysfs.txt try something like root@lime2-2:~# cat /sys/class/gpio/gpiochip0/ngpio 288 if that works and gives you a number, then gpios are working fine and you can use them. since pinctrl and the gpio susbystem are used for lots of purposes by many different parts of the kernel and drivers, I think it's unlikely your kernel would boot without it being functional -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
