mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-01-16 11:01:12 -05:00
2cf7e87fc4
Jacob Keller says: ==================== ptp: convert remaining users of .adjfreq A handful of drivers remain which still use the .adjfreq interface instead of the newer .adjfine interface. The new interface is preferred as it has a more precise adjustment using scaled parts per million. A handful of the remaining drivers are implemented with a common pattern that can be refactored to use the adjust_by_scaled_ppm and diff_by_scaled_ppm helper functions. These include the ptp_phc, ptp_ixp64x, tg3, hclge, stmac, cpts and bnxt drivers. These are each refactored in a separate change. The remaining drivers, bnx2x, liquidio, cxgb4, fec, and qede implement .adjfreq in a way different from the normal pattern expected by adjust_by_scaled_ppm. Fixing these drivers to properly use .adjfine requires specific knowledge of the hardware implementation. Instead I simply refactor them to use .adjfine and convert scaled_ppm into ppb using the scaled_ppm_to_ppb function. Finally, the .adjfreq implementation interface is removed entirely. This simplifies the interface and ensures that new drivers must implement the new interface as they no longer have an alternative. This still leaves parts per billion used as part of the max_adj interface, and the core PTP stack still converts scaled_ppm to ppb to check this. I plan to investigate fixing this in the future. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
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.