69c8a9bcb0
If we don't use CONT to keep SS activated or use DMA mode without cs-gpio, SS will be inactivated between every words. The word here means the data sent once which length can be set as 1/2/4 bytes. In the isr function, we read the FSR_RXCOUNT just behind the fsl_lpspi_read_rx_fifo. This causes the value of FSR_RXCOUNT cannot reflect whether there is still data not sent timely. So do this judgement by FSR_TXCOUNT. Signed-off-by: Clark Wang <xiaoning.wang@nxp.com> Signed-off-by: Mark Brown <broonie@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.