Re: gpiolib on at91

[Bill Gatliff <bgat@xxxxxxxxxxxxxxx>]

Joe wrote:
> Hi all!
>
>  From what i've read on the ML, Ryan Mallon ported the gpiolib to AT91 
> platform (many thanks), but could maybe point me someone to an 
> example/appropriate documentation on how to implement the use of the 
> gpiolib into the board support file?
> Grepping and google failed me unfortunately.
> The hardware is nothing fancy, just 4 dip-switches intended to set some 
> configuration options, and therefore i think the cleanest approach would 
> be to be able to see "1" or "0" in somewhere sysfs/gpio.
> Are there any hints maybe?
>   

Echo the number of the gpio pin to /sys/class/gpio/export, and then a
directory should appear under /sys/class/gpio.  Pins default to input,
so you should be able to cat /sys/class/gpio/gpioNNN/value to see the
state of the pin.


b.g.

-- 
Bill Gatliff
bgat@xxxxxxxxxxxxxxx



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