tree 6c31c5333a8f0bb2b1e36b2321da29619b6e471f
parent 547cea19b875ce83cc7c14ae750eca4973dab555
author Simon Glass <sjg@chromium.org> 1413265312 -0600
committer Simon Glass <sjg@chromium.org> 1413995806 -0600

dm: spi: Add a uclass for SPI

Add a uclass which provides access to SPI buses and includes operations
required by SPI.

For a time driver model will need to co-exist with the legacy SPI interface
so some parts of the header file are changed depending on which is in use.
The exports are adjusted also since some functions are not available with
driver model.

Boards must define CONFIG_DM_SPI to use driver model for SPI.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
(Discussed some follow-up comments which will address in future add-ons)