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a5733666c7SPI index mode has hardware limitation of transferring only 64 bytes per transaction due to fixed number of FIFO registers. This constraint leads to performance issues when reading/writing data to/from NAND/NOR flash devices, as the controller must issue multiple requests to read/write 64-byte chunks, even if the slave can transfer up to 2 or 4 KB in a single transaction. The AMD HID2 SPI controller supports DMA mode, allowing for reading/writing up to 4 KB of data in a single transaction. The existing spi_amd driver already supports HID2 DMA read operations. This patch introduces changes to implement HID2 DMA single mode basic write support for the HID2 SPI controller. Co-developed-by: Krishnamoorthi M <krishnamoorthi.m@amd.com> Signed-off-by: Krishnamoorthi M <krishnamoorthi.m@amd.com> Co-developed-by: Akshata MukundShetty <akshata.mukundshetty@amd.com> Signed-off-by: Akshata MukundShetty <akshata.mukundshetty@amd.com> Signed-off-by: Raju Rangoju <Raju.Rangoju@amd.com> Link: https://patch.msgid.link/20250516100658.585654-3-Raju.Rangoju@amd.com Signed-off-by: Mark Brown <broonie@kernel.org> |
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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 reStructuredText 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.