[meta-fsl-ppc]: Enable gpio expander for p2041?

["Nora Björklund" <Nora.Bjorklund@enea.com>]

Hi all,

I was working on a p2041rdb target not so long ago and needed to use
the gpio pins (described in detail in the p2041 reference manual),
these are visible on the p2041 fact sheet [1]. The pins are connected
to a gpio expander, PCA9672 [2], which is connected to an i2c-bus. 

The expander was not available in the device-tree for p2041rdb so I
patched it locally to include it. The gpio-expander does not seem to be
available in any upstream repository either (at this time I was working
on a version of the 3.12 kernel).

Would this patch be of any interest for meta-fsl-ppc?

The gpio pins are there on all p2041rdb targets (at least since they
are mentioned as such in the reference guide), so I could not come up
with a reason to why it is excluded from the device tree.

Best Regards,
Nora Björklund 

-----------------------------
[1] http://cache.nxp.com/files/32bit/doc/fact_sheet/P2041RDBFS.pdf?fpsp
=1&WT_TYPE=Fact%20Sheets&WT_VENDOR=FREESCALE&WT_FILE_FORMAT=pdf&WT_ASSE
T=Documentation&fileExt=.pdf (login might be required)
[2] http://www.nxp.com/products/interface-and-connectivity/interface-an
d-system-management/i2c/i2c-general-purpose-i-o/remote-8-bit-i-o-
expander-for-fm-plus-ic-bus-with-interrupt-and-reset:PCA9672