On Tue, Nov 30, 2021 at 06:14:01PM +0200, Andy Shevchenko wrote: > On Tue, Nov 30, 2021 at 04:41:23PM +0100, Bartosz Golaszewski wrote: ... > Not sure I understand the proposal. Can you provide couple of (simplest) > examples? > > And also it sounds like reinventing a wheel. What problem do you have that you > need to solve this way? Have you seen these: drivers/gpio/gpio-dwapb.c drivers/mfd/intel_quark_i2c_gpio.c ? GPIO driver has a main (controller level) node along with children on per bank basis. Currently it works with the provided approach (see second driver). -- With Best Regards, Andy Shevchenko