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Hardware does not support having the same RTS level during RX and TX when RS485 mode is on (URA in Fintek terminology). The manufacturer has also confirmed that the delays are not enabled if the RS485 mode is not enabled. Therefore we should return -EINVAL if the user wants to have the same value for RTS_ON_SEND and RTS_AFTER_SEND. Cc: "Ji-Ze Hong (Peter Hong)" <hpeter@gmail.com> Cc: Lukas Wunner <lukas@wunner.de> Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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| README | ||
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.