On Wed, Jul 1, 2015 at 9:34 PM, Richard Cochran <[email protected]> wrote:
> The system-on-chips using this IP core have well defined gpio numbers. > Instead of using random numbers, this patch lets the device tree specify > the correct gpio numbering. > > Signed-off-by: Richard Cochran <[email protected]> (...) > +- snps,base : The base gpio number. NACK. And it has been NACKed before again and again, search the mailinglist for repetitive answers. The GPIO numbers inside the Linux kernel are Linux specific and have nothing to do with the hardware numbers. If they sometimes match it is a lucky coincidence. The same goes for IRQ numbers in the kernel FWIW. So this "binding" has nothing to do with describing the hardware, which device tree is for. If it ever comes to exist it needs to be a "linux-*" property. But I doubt it will. We are working to remove dependency on them by introducing GPIO descriptors and thinking heavily about how to handle the userspace sysfs ABI moving forward. But for the ABI the numbers just need to be stable, not intuitive. 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
