dt: add clock binding doc to primecell bindings

Add clock binding information for primecell peripherals. For most, a
clock input name of "apb_pclk" is required. Any primecell peripherals
which are different will need to be documented separately.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
This commit is contained in:
Rob Herring 2012-04-14 20:30:29 -05:00 • committed by Mike Turquette
commit 260b6aa03e