On Tue, Nov 6, 2012 at 1:31 AM, Vasily Khoruzhick [off-list ref] wrote:

On Sat, Nov 3, 2012 at 12:29 AM, Vasily Khoruzhick [off-list ref] wrote:

quoted

quoted

I prefer to use pinctrl-single driver instead. I'm updating mmp
pinctrol driver to
pinctrl-single driver framework. You can find them in mailist. I'm submitting
a third round in these days.

Regards
Haojian

OK, one more question:

On PXA2xx GPIO and PINMUX are not separate blocks. Each pin can be
either input or output and have 4 modes (gpio + 3 alternate functions)
== 8 states , so we have: gpio in, gpio out, 3 alt in, 3 alt out.
To control pin mode one should write to GPDR (direction register) and
GAFR (alternate function register). pxa-gpio driver controls both of
those registers, so does pxa2xx-mfp.

I'm not sure what to do in this case. Should I move code controlling
GPDR and GAFR into some pinctrl-pxa2xx driver, and modify pxa-gpio
driver to use it?

Regards
Vasily

Daniel, Haojian, any suggestion?

I'm stuck at the moment, and have no idea how to handle it...
pinmux/gpio are connected in hardware
and I don't see a way to handle them with 2 separate drivers (gpio and
pinmux) in software...

Regards
Vasily

I checked the PXA25x spec. pinmux functions are contained in gpio registers.

It doesn't matter. You can still you pinmux register. You only need to control
GAFP in pinmux driver.