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0c545240ae
According to the BSP source code, both the AR100 and R_APB2 clocks have
PLL_PERIPH0 as mux index 3, not 2 as it was on previous chips. The pre-
divider used for PLL_PERIPH0 should be changed to index 3 to match.
This was verified by running a rough benchmark on the AR100 with various
clock settings:
| mux | pre-divider | iterations/second | clock source |
|=====|=============|===================|==============|
| 0 | 0 | 19033 (stable) | osc24M |
| 2 | 5 | 11466 (unstable) | iosc/osc16M |
| 2 | 17 | 11422 (unstable) | iosc/osc16M |
| 3 | 5 | 85338 (stable) | pll-periph0 |
| 3 | 17 | 27167 (stable) | pll-periph0 |
The relative performance numbers all match up (with pll-periph0 running
at its default 600MHz).
Signed-off-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
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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.