Re: [PATCH 0/4 v4] pin controller subsystem v4

[Barry Song]

> - Rewrite the interaction with the GPIO subsystem - the pin
> Âcontroller descriptor now handles this by defining an offset
> Âinto the GPIO numberspace for its handled pin range. This is
> Âused to look up the apropriate pin controller for a GPIO pin.
> ÂThen that specific GPIO range is matched 1-1 for the target
> Âcontroller instance.
...
>
> Linus Walleij (4):
> Âdrivers: create a pinmux subsystem v4
> Âpinmux: add a driver for the U300 pinmux
> Âamba: request muxing for PrimeCell devices
> Âmach-u300: activate pinmux driver, delete old padmux driver

it seems there is not an actual example that gpio requests pin from
pinctrl yet. i might give one on SiRFprimaII.

Thanks
Barry
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