Hi Mark,

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CS can also be controlled automatically by setting AUTO_N_MANUAL to 1
in CS_CFG. When it is auto CS automatically toggles between packet to
packet. NCS_TIME_COUNT in CS_CFG controls the inactive period. The
driver by default uses manual mode. But on exynos7 the manual mode is
removed.

OK, but what's a packet here?

Packet is either 1 byte or 4 bytes size depends on width of the SPI
channel.

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I tested the driver with wm5110 codec.

Did you try firmware downloads or something else that generates multiple
transfers in a message?  Normal register writes will use a single
transfer so I'd expect them to just work.

OK. I don't have provision to test on this board. I will try to test
on older boards by disabling manual mode.

I tested on exynos5420 peach-pit by enabling auto mode. I used dd
command to read 1MB data from spi flash and I compared the result with
manual mode. Both are same.

I also tested this patch with Javier Martinez Canillas patches for
enabling spidev nodes from
http://www.spinics.net/lists/linux-samsung-soc/msg39057.html.

I read 4MB flashdata from spi by enabling auto mode and compared the
result. They look same.

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Thanks
padma