tree e793d4d24faf61ebedeb96280ce4564643d1235b
parent 7bedaa5537604f34d1d63c5ec7891e559d2a61ed
author Russell King <rmk+kernel@arm.linux.org.uk> 1340271455 +0100
committer Russell King <rmk+kernel@arm.linux.org.uk> 1343732781 +0100

dmaengine: omap: add support for returning residue in tx_state method

Add support for returning the residue for a particular descriptor by
reading the current DMA address for the source or destination side of
the transfer as appropriate, and walking the scatterlist until we find
an entry containing the current DMA address.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>