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This is a preparation patch before adding the DW DMA support into the DW SPI MMIO driver. We need to unpin the Non-DMA-specific code from the intended to be generic DW APB SSI DMA code. This isn't that hard, since the most part of the spi-dw-mid.c driver in fact implements a generic DMA interface for the DW SPI controller driver. The only Intel MID specifics concern getting the max frequency from the MRST Clock Control Unit and fetching the DMA controller channels from corresponding PCIe DMA controller. Since first one is related with the SPI interface configuration we moved it' implementation into the DW PCIe-SPI driver module. After that former spi-dw-mid.c file can be just renamed to be the DW SPI DMA module optionally compiled in to the DW APB SSI core driver. Co-developed-by: Georgy Vlasov <Georgy.Vlasov@baikalelectronics.ru> Co-developed-by: Ramil Zaripov <Ramil.Zaripov@baikalelectronics.ru> Signed-off-by: Georgy Vlasov <Georgy.Vlasov@baikalelectronics.ru> Signed-off-by: Ramil Zaripov <Ramil.Zaripov@baikalelectronics.ru> Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Alexey Malahov <Alexey.Malahov@baikalelectronics.ru> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Feng Tang <feng.tang@intel.com> Cc: Rob Herring <robh+dt@kernel.org> Cc: linux-mips@vger.kernel.org Cc: devicetree@vger.kernel.org Link: https://lore.kernel.org/r/20200529131205.31838-11-Sergey.Semin@baikalelectronics.ru 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.