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    SubjectRe: [PATCH v4 0/7] Implement get_multiple for ACCES and PC/104 drivers
    On Thu, Mar 22, 2018 at 1:59 PM, William Breathitt Gray
    <vilhelm.gray@gmail.com> wrote:

    > Changes in v4:

    I applied the v4 patch set so we get some rotation in linux-next before
    the merge window.

    If reviewers still find smallish issues they can certainly be fixed in follow-up
    patches.

    > This patchset implements get_multiple callbacks for the PC104 GPIO
    > drivers as well as the PCI-IDIO-16 and PCIe-IDIO-24 GPIO drivers. These
    > devices all acquire the multiple input lines with a single read, so
    > utilizing the get_multiple callback can provide improvement for those
    > users who regularly access multiple input lines.

    Did you use the userspace chardev for some interesting experiments
    with your set-ups?

    I tend to think of your applications as pretty interesting for industry
    peers, and a good proof-of-concept for the userspace API.

    > While developing this patchset I noticed many of these devices make use
    > of Intel 8255 compatible interfaces for their I/O. I may write a generic
    > 8255 GPIO driver in the future to reduce some of the redundant code I
    > see pop among the drivers for these devices.

    Oh!
    This guy?
    https://en.wikipedia.org/wiki/Intel_8255

    Yeah that makes all kind of sense. We are living with the legacy
    of the first PCs every day when it comes own to EISA & friends...

    Yours,
    Linus Walleij

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