Re: [PATCH] gpio/serial: revert "linux,first-pin" property handling

[Linus Walleij <linus.walleij@xxxxxxxxxx>]

On Tue, Jul 11, 2017 at 5:42 PM, Jan Kiszka <jan.kiszka@xxxxxxxxxxx> wrote:
> On 2017-07-10 16:23, Jan Kiszka wrote:
>> On 2017-07-10 16:09, Linus Walleij wrote:
>>> This is not a legal device tree property, because its binding has
>>> not been reviewed and approved, nor does it exist in any device
>>> tree binding document.
>>>
>>> It is further wrong, because it is added to the GPIO offset which
>>> is by definition controller-local.
>
> BTW, I don't get this second statement. The parameter passed in is
> controlling which pin of the GPIO device can be controlled by the driver
> at all. And that's also a very private interface between 8250_exar and
> gpio-exar: the former tells the latter which pins are physically
> available to drive, because the former operates the others already.

Then it seems like the big confusion here is the "linux,*" prefix in
the DT binding.

We only use that for information which is necessary evil Linux-specific
stuff.

What you are talking about should be hardware-and-vendor specific
info and prefixed "exar,*".

Can you propose a patch simply changing the binding and try to get
the DT maintainers ACK on it?

Yours,
Linus Walleij
--
To unsubscribe from this list: send the line "unsubscribe linux-gpio" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html