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582ac13496
Pull the external clock frequency validation into a separate function, to avoid conflating it with external clock DT property decoding and clock mux register configuration. This should make the code easier to read and understand. This does change the code behavior slightly. The clock mux PMCR register setting now depends solely on the DT properties which configure the clock mux between external clock and internal RCC generated clock. The mux PMCR register settings no longer depend on the supplied clock frequency, that supplied clock frequency is now only validated, and if the clock frequency is invalid for a mode, it is rejected. Previously, the code would switch the PMCR register clock mux to internal RCC generated clock if external clock couldn't provide suitable frequency, without checking whether the RCC generated clock frequency is correct. Such behavior is risky at best, user should have configured their clock correctly in the first place, so this behavior is removed here. Signed-off-by: Marek Vasut <marex@denx.de> Signed-off-by: Christophe Roullier <christophe.roullier@foss.st.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com> |
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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.