doc: Add companion SPI message protocol doc
authorKeith Packard <keithp@keithp.com>
Fri, 13 Jan 2012 18:40:30 +0000 (10:40 -0800)
committerKeith Packard <keithp@keithp.com>
Sun, 3 Jun 2012 02:38:29 +0000 (19:38 -0700)
commit091affece185dcd0832a55b0befeacaa182a57bb
treea8ce02870c3f5109c9b1ba301b10d0caf600dea9
parentbb5b5312a0c6102b12f3d4710ef213f0f6c67412
doc: Add companion SPI message protocol doc

Signed-off-by: Keith Packard <keithp@keithp.com>