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Some modules may need to change its clock rate before turn on it. So changing PLL's rate when it is off should be allowed. This patch removes PLL enabled check before set rate, so that PLLs can set new frequency even if they are off. On MT8173 for example, ARMPLL's enable bit can be controlled by other HW. That means ARMPLL may be turned on even if we (CPU / SW) set ARMPLL's enable bit as 0. In this case, SW may want and can still change ARMPLL's rate by changing its pcw and postdiv settings. But without this patch, new pcw setting will not be applied because its enable bit is 0. Signed-off-by: James Liao <jamesjj.liao@mediatek.com> Acked-by: Michael Turquette <mturuqette@baylibre.com> Signed-off-by: Weiyi Lu <weiyi.lu@mediatek.com> Reviewed-by: James Liao <jamesjj.liao@mediatek.com> Signed-off-by: Stephen Boyd <sboyd@kernel.org> |
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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 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.