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Some of the gate clocks are described as "just in case" bits in the datasheet. Examples are the ABP, PERIPH, AXI and L2 DRAM clocks on Meson8b. The datasheet suggests that these bits are not touched. The full explanation is: "Set to 1 to manually disable the [...] clock when changing the mux selection. Typically this bit is set to 0 since the clock muxes can switch without glitches.". This adds new read-only ops for gate clocks so we can describe these clocks in our clock controller drivers while ensuring that we can't accidentally modify the registers. Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> Acked-by: Neil Armstrong <narmstrong@baylibre.com> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> Link: https://lkml.kernel.org/r/20181122214017.25643-3-martin.blumenstingl@googlemail.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 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.