tree 7f6e037e0065193fcda7b4d3305110f5159f92f6
parent 805a6af8dba5dfdd35ec35dc52ec0122400b2610
author Mark Brown <broonie@opensource.wolfsonmicro.com> 1320922652 +0000
committer Mark Brown <broonie@opensource.wolfsonmicro.com> 1327151377 +0000

spi/s3c64xx: Log error interrupts

Although the hardware supports interrupts we're not currently using them
at all since for small transfers the overhead is greater than that for
busy waiting and for large transfers we have interrupts from the DMA.
This means that if the hardware reports an error (especially one which
might not stall transfer) we might miss it.

Take a first pass at dealing with such errors by enabling the interrupt
if we can and logging the errors if they happen. Ideally we'd report the
error via the affected transfer but since we're in master mode it's very
difficult to trigger errors at present and this code is much simpler.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>