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If the channel selection or deselection times out, it indicates a failure in the mux's I2C subsystem. Without sending a reset pulse, a power-on-reset of the entire device would be required to restore communication. The datasheet specifies a minimum hold time of 4 ns for the reset pulse, but due to the path's capacitance and themux having its own clock, it is recommended to extend this to approximately 1 us. Since reset controller is used, there is no need to take care of other devices sharing the same reset line. Signed-off-by: Wojciech Siudy <wojciech.siudy@nokia.com> [wsa: removed superfluous prinout, unneeded braces and fixed indent] Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
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.