[PATCH 1/2] gpio: dwapb: Use human understandable gpio numbering.

On 07/02/2015 04:26 PM, Richard Cochran wrote:

On Thu, Jul 02, 2015 at 09:36:22AM +0200, Sebastian Andrzej Siewior wrote:

quoted

If you are in a specific SoC you could do
	base = of_alias_get_id(np, "gpio") * num_of_gpio_per_chip
and get consistent numbers / sane.

And what about /sys/class/gpio ?

What about it?

quoted

I think this is the one reason why there is no generic binding for the
starting address. The other reason might be that this is simply a user
space problem. To get consistent numbers all you need to do to lookup
each gpio's memory address and decide if this is the one you look for.

The user should be able to simply look up a GPIO in the data sheet,
and then use it from a shell script.  Why not make that easy to do?

(Other gpio controllers are doing that, too, BTW.)

I'm not saying that you should not do so. There is _no_ generic binding
for this and this is what I suggest.

Thanks,
Richard

Sebastian