Re: [PARPORT] parport_yield

From: Tim Waugh (
Date: Wed May 10 2000 - 13:07:08 EDT

  • Next message: Tim Waugh: "Re: [PARPORT] writing data to the parallel port"

    On Wed, May 03, 2000 at 03:28:39PM -0400, Nordic Boy wrote:

    > As you may know, I am attempting to write a parport driver for an
    > ATEN AS/2 switch. In order to accomplish some sort of multiplexing, I
    > decided that it would be a good idea to use parport_yield. However, it
    > doesn't seem to exist in the 2.2 kernels.

    Look in include/linux/parport.h.

    > However, if that were the case, why do I see it in lp.c? Is that a
    > special case? I also notice that the other parport drivers tend to
    > use parport_release. Would it be better to use that instead?

    It depends really. parport_yield doesn't always do a release/claim
    sequence, so it might be faster/more efficient -- but it depends how
    your driver works really.


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