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The STM32 SDMMC peripheral (at least for the STM32F429, STM32F469 and STM32F746, which are all the currently supported devices using periphid 0x00880180) requires DMA to be performed in peripheral flow controller mode. From the STM32F74/5 reference manual, section 35.3.2: "SDMMC host allows only to use the DMA in peripheral flow controller mode. DMA stream used to serve SDMMC must be configured in peripheral flow controller mode" This patch adds a variant option to control peripheral flow control and enables it for the STM32 variant. Signed-off-by: Ben Wolsieffer <Ben.Wolsieffer@hefring.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Link: https://lore.kernel.org/r/20230928135644.1489691-1-ben.wolsieffer@hefring.com Signed-off-by: Ulf Hansson <ulf.hansson@linaro.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 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.