(In reply to A. Chaud from comment #15)
> Regarding the 0x535.  It's a workaround for bug 31120.  The lower half of
> the register gets set to 0x7fff upon waking from suspend which disables the
> backlight. This changes it back to a working value.

There should be a way to save a value on suspend and restore that saved value
on resume.

BTW, I didn't check whether you're still doing this in the latest patch, but a
few things I remember noticing:

(a) foo | 0x80000000, not +
(b) use ARRAY_SIZE, although I think you got rid of that array anyways