On Fri, Oct 30, 2015 at 2:55 AM, Alexandre Courbot <[email protected]> wrote: > On Sun, Oct 25, 2015 at 3:42 AM, Markus Pargmann <[email protected]> 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 -- To unsubscribe from this list: send the line "unsubscribe linux-gpio" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
