Re: [PATCH 0/6] GPIO character device skeleton

[Linus Walleij <linus.walleij@xxxxxxxxxx>]

On Fri, Oct 30, 2015 at 2:55 AM, Alexandre Courbot <gnurou@xxxxxxxxx> wrote:
> On Sun, Oct 25, 2015 at 3:42 AM, Markus Pargmann <mpa@xxxxxxxxxxxxxx> wrote:

>> What happens if we have two I2C gpio expanders with the same I2C
>> addresses connected to different I2C busses? If I see this correctly
>> they would both show up with the same name. Is there an easy and
>> race-free way to see which GPIO chip is connected to which I2C bus?
>
> I suppose the bus path could be part of the GPIO chip name to avoid
> this ambiguity, something like: 7000c000.i2c/0-001c.gpio

For DT that is the simple solution.

Right now it used gpiochip->label if that is set, else the name of
the gpiochip device like gpiochip0, gpiochip1 etc.

Yours,
Linus Walleij
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