From mboxrd@z Thu Jan  1 00:00:00 1970
From: <bogus@does.not.exist.com>
Date: Mon, 05 Dec 2011 12:53:56 -0000
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"IGNORE_CRC bit: In SPI/SSI modes: When set to 1, deassert the chip
select (SSn) pin after the command is executed."

Then I tought that mxs_spi_end_xfer should be also called in the case
where bitlen==0. In current code this does not happen.

> It seems that the mainline linux only implements a GPIO based SPI driver.
> So we cannot take it for reference.

There is no mxs spi driver in the mainline kernel yet.