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    SubjectRe: [RFC][PATCH] new timeofday core subsystem (v.A0)
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    On Fri, 2004-09-03 at 00:43, George Anzinger wrote:
    > john stultz wrote:
    > > On Thu, 2004-09-02 at 17:47, Christoph Lameter wrote:
    > >
    > >>On Thu, 2 Sep 2004, john stultz wrote:
    > > read(): Rather then just giving the address of the register, the read
    > > call allows for timesource specific logic. This lets us use jiffies as a
    > > timesource, or in cases like the ACPI PM timesource, where the register
    > > must be read 3 times in order to ensure a correct value is latched, we
    > > can avoid having to include that logic into the generic code, so it does
    > > not affect systems that do not use or have that timesource.
    >
    > I am not convince that 3 reads are in fact needed. In fact, I am amost certain
    > that two is more than enough. In fact, it takes so long to read it that I just
    > use one read and a sanity check in the HRT code. Here is the code I use:

    [snip]

    I'd have to defer to Dominik (acpi-pm author) for that. But the case
    remains, to get a "good" value, you have to do more then just give
    access to the raw register.

    thanks
    -john

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