On 05/23/2017 10:18 AM, Linus Walleij wrote: > On Thu, May 11, 2017 at 10:23 PM, Jacek Anaszewski > <jacek.anaszewski@xxxxxxxxx> wrote: > >>> +Optional properties: >>> +- gpio-controller: allows pins to be used as GPIOs. > > Are these output-only? Then write something about that. no. input is also supported. >>> +- #gpio-cells: if present, must not be 0. > > Must be present and must be <2> > >>> +- gpio-base : base number of the pins used as GPIOs. If there are more >>> + than one, they should be contiguous. See 'type' property >>> + below. > > NACK. Not in my life. yes, indeed. this is useless. > Provide -1 in the Linux driver and use the ioctl() from userspace > to look up your gpios. Add .names array to the gpiochip if necessary, > define line names in the device tree for the board. > > Consult tools/gpio/* for the modern way of using GPIOs. OK. I wasn't aware of these. Thanks, C.
