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    SubjectRe: [PATCH] ata: ahci: Enable enclosure management via LED (resend)
    On Thu, 25 Oct 2007 23:35:11 +0200
    Ingo Oeser <> wrote:

    > Hi Kristen,
    > On Thursday 25 October 2007, Kristen Carlson Accardi wrote:
    > > Enable enclosure management via LED
    > >
    > > As described in the AHCI spec, some AHCI controllers may support
    > > Enclosure management via a variety of protocols. This patch
    > > adds support for the LED message type that is specified in
    > > AHCI 1.1 and higher.
    > Linux has a LED subsystem for that. May I suggest, that you just register
    > these leds and let userspace handle them via that via the LED API?
    > The LED userspace API is described in Documentation/leds-class.txt
    > and the headers for registering LEDs is linux/leds.h under include/
    > Since you explicitly WANT user space to control these, that should
    > be the right API.
    > Richard, what do YOU think?
    > Best Regards
    > Ingo Oeser

    I did look into using the LED class for this, but it didn't appropriate
    as I wanted the leds to be associated with a particular disk, and not
    with the platform as a whole. It seemed to me that the led_class was
    a bit of overkill for what we needed to do here, since we just need
    on/off and nothing else.
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