From: Geert Uytterhoeven <geert+renesas@linux-m68k.org>
Date: Fri, 21 Feb 2014 16:29:18 +0000 (+0100)
Subject: spi: rspi: Fix loopback mode for Dual/Quad SPI Transfers
X-Git-Tag: v3.15-rc1~147^2~3^8~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ba824d4971691a7f1f66429e378a08a95fbb5b79;p=pandora-kernel.git

spi: rspi: Fix loopback mode for Dual/Quad SPI Transfers

While normal Dual and Quad SPI Transfers are unidirectional, we must do
a bidirectional transfer if loopback mode is enabled, else rx_buf is not
filled.

With spidev it seemed to work, as spidev uses the same buffer for
tranmission and reception.

Signed-off-by: Geert Uytterhoeven <geert+renesas@linux-m68k.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
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