From: Yi Li <yi.li@analog.com>
Date: Wed, 3 Jun 2009 09:46:22 +0000 (+0000)
Subject: spi/bfin_spi: utilize the SPI interrupt in PIO mode
X-Git-Tag: v2.6.37-rc1~187^2~2^2~25
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f6a6d96685be6e784849d067b44acb831f595417;p=pandora-kernel.git

spi/bfin_spi: utilize the SPI interrupt in PIO mode

The current behavior in PIO mode is to poll the SPI status registers which
can obviously lead to higher latencies when doing a lot of SPI traffic.
There is a SPI interrupt which can be used instead to signal individual
completion of transactions.

Signed-off-by: Yi Li <yi.li@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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