Describe the second debug serial port (CN9800) on the Gray Hawk Single board, as provided by HSCIF2, including the SCIF_CLK2 external clock source, and all related pin control. Based on a patch for Gray Hawk in the BSP by Nghia Nguyen. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Link: https://lore.kernel.org/r/6e1faff6a717cb8344661bafcae5db5dcfb53a90.1709741303.git.geert+renesas@glider.be
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.
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