> > Anyway it is a bit complicated, could I use this version of GPIO implementation if > > it's really tough? > > It's possible but from GPIO subsystem point of view it's discouraged > as long as there is no technical impediment to go the regmap way. After these days of trying, I guess there are still some bugs on gpio - regmap - irq. It looks like an compatibility issue with gpio_irq_chip and regmap_irq_chip (My rough fixes seems to work). Other than that, it seems to be no way to add interrupt trigger in regmap_irq_thread(), to solve the both-edge problem for my hardware. I'd be willing to use gpio-regmap if above issues worked out, I learned IRQ controller, IRQ domain, etc. , after all. But if not, I'd like to implement GPIO in the original way, it was tested to work. May I? Thanks for all your suggestions.
