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d8fae2504e
The 82576 PTP implementation still uses .adjfreq instead of using the newer .adjfine. This implementation uses a pre-simplified calculation since the base increment value for the 82576 is just 16 * 2^19. Converting this into scaled_ppm is tricky, and makes the intent a bit less clear. Simply convert to the normal flow of multiplying the base increment value by the scaled_ppm and then dividing by 1000000ULL << 16. This can be implemented using mul_u64_u64_div_u64 which can avoid the possible overflow that might occur for large adjustments. Use of .adjfine can improve the precision of small adjustments and gets us one driver closer to removing the old implementation from the kernel entirely. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Gurucharan <gurucharanx.g@intel.com> (A Contingent worker at Intel) Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.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 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.