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2cd757e629The module omap2-mcspi does not support the interword delay parameter present in the spi transfer. On one side, if the module is instructed to use the dma, this parameter is correctly ignored. However, without the usage of the dma, that parameter should be used. The patch introduce the handling of such delay in the omap2-mcspi module, using standard spi_delay struct. The patch has been tested using as benchmark a DM3730. The delay function used (spi_delay_exec) is already present in the kernel and it checks on its own the validity of the input, as such, no additional checks are present. The range of usage of the udelay function is incremented to 200 us, as the change from udelay to usleep_range introduces not neglectible delays. Signed-off-by: Andrea Zanotti <andreazanottifo@gmail.com> Link: https://lore.kernel.org/r/20220502111300.24754-1-andreazanottifo@gmail.com Signed-off-by: Mark Brown <broonie@kernel.org> |
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| README | ||
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.