On Sun, Dec 13, 2020 at 4:00 PM Andy Shevchenko <andy.shevchenko@xxxxxxxxx> wrote: > > On Sun, Dec 13, 2020 at 3:56 PM Linus Walleij <linus.walleij@xxxxxxxxxx> wrote: > > > > We need to make this namespace hierarchical: at least do not > > allow two lines on the same chip to have the same name, this > > is just too much flexibility. If we name a line on a chip, > > name it uniquely on that chip. > > > > I don't know what happens if we just apply this, I *hope* there > > are not a lot of systems out there breaking this simple and > > intuitive rule. > > > > As a side effect, this makes the device tree naming code > > scream a bit if names are not globally unique. > > > > I think there are not super-many device trees out there naming > > their lines so let's fix this before the problem becomes > > widespread. > > I think it is a right direction but the name space should be attached > to the GPIO chip, globally it may be several GPIO chips on some boards > which are doing the same thing semantically. So, the compound of > gpiochipN:name should be unique globally. I too like the idea of having the line names unique per chip. It'll also make things easier for libgpiod. Bartosz > > ... > > > + return -EINVAL; > > > + return -EINVAL; > > A nit: -EEXIST ? > > -- > With Best Regards, > Andy Shevchenko