Hi Linus, On Fri, Nov 24, 2017 at 10:30:40AM +0100, Linus Walleij wrote: > The goal I'm working toward is to rid the kernel of the global > GPIO numberspace. > > This means GPIO lines should be references by the local offset > on the GPIO chip. > > This patch set starts to move gpio_keys toward using GPIO > look-up tables instead of global GPIO numbers to find their > GPIOs. > > As an example I did (I think) the necessary patches to > convert DaVinci and i.MX to use this. There are several users > also x86 platform devices. > > Strategy: > > - Merge the patch to input/keyboard/gpio_keys* to support > using descriptors from board files. > > - Refactor the whole universe to get proper names on GPIO > chips, and reference the GPIO lines with local offsets using > tables, as in the example patches in this series. These > can trickle in after the first patch is merged in Input. > The work to be done can be seen if you type: > git grep gpio_keys_platform_data > > - When all are refactored, remove the "gpio" and "active low" > members from the platform data and delete the associated > legacy GPIO handling in the input driver for gpio_keys. > > Posting this with the examples to get buy-in from Dmitry > before I go and spend time refactoring the world. I think this is a worthy goal, but I wonder if we could get static GPIO descriptors work with fwnode_get_named_gpiod() so we could retire the platform data parsing altogether. We'd need to extend static device properties to have notion of children though. Thanks. -- Dmitry -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
