On 07/02/2015 04:26 PM, Richard Cochran wrote: > On Thu, Jul 02, 2015 at 09:36:22AM +0200, Sebastian Andrzej Siewior wrote: >> 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? > >> 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 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
