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    SubjectRe: [ACPI] PATCH-ACPI based CPU hotplug[2/6]-ACPI Eject interface support
    Date
    On Monday 20 September 2004 07:52 pm, Alex Williamson wrote:
    > On Mon, 2004-09-20 at 18:12 -0500, Dmitry Torokhov wrote:
    > >
    > > Hi Anil,
    > >
    > > I obviously failed to deliver my idea :) I meant that I would like add eject
    > > attribute (along with maybe status, hid and some others) to kobjects in
    > > /sys/firmware/acpi tree.
    > >
    >
    > Dmitry,
    >
    > See the patch I just posted to acpi-devel and lkml (Subject:
    > [PATCH/RFC] exposing ACPI objects in sysfs). It exposes acpi objects as
    > you describe. Something simple like:
    >
    > # cat /sys/firmware/acpi/namespace/ACPI/_SB/LSB0/_EJ0
    >
    > Will call the _EJ0 method on the ACPI device. You can evaluate eject
    > dependencies using the _EJD method.
    >
    > Alex
    >

    Alex,

    While I think that your patch is very important and should be included (maybe
    if not as is if somebody has some objections but in some other form) I see it
    more like developer's tool. I imagined status, HID, eject etc. attributes to
    be sanitized interface to kernel's data, not necessarily causing re-evaluation.

    So it could be like this:

    /sys/firmware/acpi/namespace/ACPI/_SB/LSB0/status
    /sys/firmware/acpi/namespace/ACPI/_SB/LSB0/removable
    /sys/firmware/acpi/namespace/ACPI/_SB/LSB0/lockable
    ..
    /sys/firmware/acpi/namespace/ACPI/_SB/LSB0/eject

    And your raw access to the ACPI methods could reside under raw:

    /sys/firmware/acpi/namespace/ACPI/_SB/LSB0/raw/_STA
    /sys/firmware/acpi/namespace/ACPI/_SB/LSB0/raw/_RNV
    /sys/firmware/acpi/namespace/ACPI/_SB/LSB0/raw/_LCK
    ..
    /sys/firmware/acpi/namespace/ACPI/_SB/LSB0/raw/_EJ0

    --
    Dmitry
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