spi: davinci: do not use temporary buffer if no transmit data provided

Browse source

Remove usage of temporary buffer when no transmit data is provided.
Instead, use the transmit register itself as the source of data.

By choosing the transmit register itself as the source of data, this
patch helps remove unnecessary accesses to memory when no real data
is being transmitted.

Signed-off-by: Brian Niebuhr <bniebuhr@efjohnson.com>
Tested-By: Michael Williamson <michael.williamson@criticallink.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

...

This commit is contained in:

Brian Niebuhr 2010-09-29 12:31:54 +05:30 • committed by Sekhar Nori

parent c29e3c60e7

commit d3f7141cbf

1 changed files with 21 additions and 31 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

52

drivers/spi/davinci_spi.c

View file