How to add GPIO outputs to the PXA2xx MFP configuration?

[Paul Parsons]

--- On Fri, 30/3/12, Igor Grinberg <grinberg at compulab.co.il> wrote:
> On 03/28/12 20:12, Paul Parsons
> wrote:
> > On PXA2xx platforms, the MFP API (described in
> Documentation/arm/pxa/mfp.txt)
> > provides values for the following:
> > 
> > 1. GPIO inputs (e.g. GPIO105_GPIO).
> > 2. Alternate function inputs (e.g. GPIO105_CIF_DD_1).
> > 3. Alternate function outputs (e.g.
> GPIO105_KP_MKOUT_2).
> > 
> > It does not provide values for GPIO outputs (i.e. AF0
> outputs).
> > 
> > One cannot use the macro used by the MFP API internally
> - MFP_CFG_OUT() - to
> > define new GPIO output values, since that macro is
> forbidden in platform code.
> > 
> > Without the ability to add GPIO outputs to the MFP
> configuration, it is not
> > possible to drive GPIO outputs high during sleep mode.
> > 
> > This would be useful, for example, on the hx4700
> platform, where driving the
> > infrared powerdown GPIO 105 high during sleep mode
> would save some mA.
> > 
> > So my question is: what method should one use to add
> GPIO outputs to the MFP
> > configuration?
> > 
> > One possible method, namely manually defining values in
> the platform code:
> > 
> >     MFP_PIN_GPIO105 | MFP_AF0 |
> MFP_DIR_OUT | MFP_LPM_DRIVE_HIGH,
> 
> Have you tried:
> GPIO105_GPIO | MFP_LPM_DRIVE_HIGH,
> ?
> 
> This way it works on other boards.

Hello Igor,

GPIO105_GPIO expands to a GPIO input - MFP_CFG_IN(GPIO105, AF0) -
not an output.

Regards,
Paul