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    SubjectRe: [RFC PATCH 0/5] CPU Jitter RNG
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    On Tue, Feb 4, 2014 at 8:23 PM,  <tytso@mit.edu> wrote:
    > However, where a decade ago the ethernet card probably had its own
    > independent clock crystal/oscillator, I'm going to guess that these
    > days with SOC's and even on laptops, with ethernet device part of the
    > chipset, it is probably being driven off the same master oscillator.

    USB typically still has its own crystal.

    > I wonder if there's anyway we can either figure out manually, or
    > preferably, automatically at boot time, which devices actually have
    > independent clock oscillators.

    You may find this information in the DT on some platforms (if you're
    lucky).

    Gr{oetje,eeting}s,

    Geert

    --
    Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

    In personal conversations with technical people, I call myself a hacker. But
    when I'm talking to journalists I just say "programmer" or something like that.
    -- Linus Torvalds


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