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Currently the PLLs are modeled as fixed factor clocks, based on initial settings. However, enabling CPU boost clock rates requires increasing the PLL clock rates. Add a custom clock driver to model the PLL clocks on R-Car Gen4, and use it for PLL2 on R-Car V4H. This allows the Z clock (Cortex-A76 core clock) to request PLL rate changes, and enable boost mode for the High Performance mode. For now this is limited to integer multiplication modes. Note that the definition for CPG_PLLxCR0_NI uses the value for R-Car V4H. On R-Car S4-8, the integer and fractional multiplication fields are one bit larger resp. smaller, but R-Car S4-8 does not support High Performance mode. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Link: https://lore.kernel.org/r/76a5952900a6e15604c640bc8a27762e0e936677.1670492384.git.geert+renesas@glider.be |
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| README | ||
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.