Re: best way to handle LEDs

From: Pavel Machek (pavel_at_suse.cz)
Date: 11/02/05

  • Next message: Lennart Sorensen: "Re: No sharing IRQ broken board problem" 
    Date:	Wed, 2 Nov 2005 22:11:46 +0100
To: Richard Purdie <rpurdie@rpsys.net>

    Hi!

    > > Perhaps I'd keep it simple and leave it at
    > >
    > > * do hardcoded kernel action for this led
    > >
    > > or
    > >
    > > * do whatever userspace tells you.
    > >
    > > That way you will not be able to remap charger LED onto hard disk
    > > indicator, but we can support that on ibm-acpi too. (Where hw controls
    > > LEDs like "sleep", but lets you control them. You can't remap,
    > > though).
    >
    > Then the arguments start about which function should be hardcoded to
    > which leds and why can't userspace access these triggers?

    Because there are some machines (IBM thinkpad) where LEDs are either
    driven by userspace, or driven by hardware. I'd like to export that
    functionality using same interface.

    > I'd prefer a totally flexible system and it doesn't really add much
    > complexity once you have a trigger framework which we're going to need
    > to handle mutiple led trigger sources sanely anyway.

    Unfortunately hardware can not do that, at least for IBM
    thinkpad. Plus, remapping harddisk indicator on battery led is not
    something I'd like to support :-).

                                                                    Pavel 

    -- 
Thanks, Sharp!
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  • Next message: Lennart Sorensen: "Re: No sharing IRQ broken board problem"

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