Re: [PATCH v2] extcon: otg_gpio: add driver for USB OTG port controlled by GPIO(s)

[David Cohen <david.a.cohen@linux.intel.com>]

Hi,

[snip]

> Felipe suggested to "divide to conquer" instead of having a single
> extcon driver to handle all these functions:
> 
> - The mux functions would be controlled by a possible new pinctrl-gpio
> driver (Linus, your input here would be nice :)
> - The VBUS would be a fixed regulator
> - The USB ID would make usage of existent extcon-gpio
> 
> But the on fw side, this is a single ACPI device representing a virtual
> device for USB OTG port, which is nothing but a bunch of independent
> GPIOs.
> 
> I could make a mfd driver to register devices for those simpler and more
> generic drivers, but according to [1] community recognized it as a hack
> with ACPI since I'd need to give them the GPIO without requesting on
> mfd.

I believe this case could be resumed in:

Would be [1] acceptable for mfd drivers?
- If yes, I can split this driver into more generic ones
- If no, I see no other option but having this driver fully controlling
  the USB OTG port.

BR, David

[1] https://lkml.org/lkml/2014/12/18/82