[PATCH] pxa/hx4700: Add Synaptics NavPoint (PXA27x SSP/SPI) driver

[Eric Miao]

>> Are you implying that the hx4700 is acting as a SPI slave?
>
> Yes.
>
>> My original
>> understanding is hx4700 is communicating with an external
>> touchpad
>> controller through SPI? If hx4700 is acting as a SPI slave,
>> then it's true
>> there is no existing framework for that yet.
>
> That's correct; the NavPoint touchpad controller is the SPI master, Linux is the SPI slave.

That's really interesting. Grant, do you have any idea we have a SPI
slave API, or that we could actually re-use the existing SPI API for
that purpose?