tree 01b2274734a04752e2d0fc139de7f3a726721e4b
parent 0c0faefcbd2d9541aec22a6e7552f0d3c054582c
author Rajeshwari Shinde <rajeshwari.s@samsung.com> 1381229406 +0530
committer Jagannadha Sutradharudu Teki <jaganna@xilinx.com> 1381236492 +0530

spi: exynos: Support word transfers

Since SPI register access is so expensive, it is worth transferring data
a word at a time if we can. This complicates the driver unfortunately.

Use the byte-swapping feature to avoid having to convert to/from big
endian in software.

This change increases speed from about 2MB/s to about 4.5MB/s.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Rajeshwari S Shinde <rajeshwari.s@samsung.com>
Reviewed-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>