[RFC 2.6.26-rc9 0/5] am200epd, pxafb, metronomefb changes v6

Hi Eric, arm and fbdev friends,

This is version 6 of this RFC and contains the following updates:
- remove use of clk api for 32k clock and replace with check and set
  in gumstix init code
- avoid exporting am200_device_fb and remove am200epd platform code
- allow am200epd to only be built as a built-in. This allows me to use
  set_pxa_fb_info and removes related issues in other parts of the code.
- change the way we do setup_fb in am200epd so am200epd does not need to
  wait for metronomefb to receive its waveform file from user space.

Thanks to Eric and Russell for feedback.
I will take out DEBUG before final.

This RFC consists of patches intended to improve the condition of the
am200epd devkit support. The am200epd devkit contains a gumstix (pxa255) and
a carrier board (am200epd or Lyre), and a metronome display controller.
Previously, there was a drivers/video/am200epd driver that manipulated pxa
LCDC registers and GPSR/GPLR registers directly. That was clearly wrong and
broken so I have removed it and written a new mach-pxa am200epd support
driver.This driver interfaces with pxafb through a set of callbacks to
share/unshare pxafb's framebuffer and achieves the same functionality without
manipulating any pxa registers directly. The patches are split as follows:

pxafb: add shared framebuffer interface
gumstix: conversion to MFP support and add bluetooth support
am200epd: convert to shared fb and use gpio api
metronomefb: convert printk to dev_dbg/err messages
metronomefb: changes to use separate framebuffer

I would be grateful for any feedback and advice.

Thanks,
jaya



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