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From: Martin Lucina <mato@kotelna.sk>
To: Len Brown <lenb@kernel.org>
Cc: Harald Welte <laforge@gnumonks.org>, linux-acpi@vger.kernel.org
Subject: Re: [PATCH] panasonic-laptop.c: add support for optical drive power control
Date: Mon, 6 Apr 2009 18:22:44 +0200	[thread overview]
Message-ID: <20090406162243.GA24791@nodbug.moloch.sk> (raw)
In-Reply-To: <alpine.LFD.2.00.0904050051330.4821@localhost.localdomain>

Harald, Len,

> Harald,
> It's your driver.  What do you what to do with this patch.
> 
> I'd delegate http://patchwork.kernel.org/patch/2372/
> to you, but you don't seem to have a patchwork account yet.

Please don't apply this just yet.  I've recently managed to get hold of
some DSDT dumps from a Panasonic CF-W5 and they've changed the CD power
management methods so as it stands the patch will only work on a CF-W4 (and
possibly older models).

I'm currently trying to get a contact at Panasonic in Japan to see if they
can provide some documentation.  If not, at the very least a more generic
approach that would work would be to call _EJ0 on the OPTD device for power
off, but I've not been able to figure out from the ACPICA documentation how
I can search the device tree for an OPTD device.

Thanks,

-mato

  reply	other threads:[~2009-04-06 16:43 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-01-13 16:32 [RFC] [PATCH] panasonic-laptop.c: add support for CD power management Martin Lucina
2009-01-13 17:16 ` Karthik Gopalakrishnan
2009-01-13 19:14   ` Martin Lucina
2009-01-14  6:08 ` Harald Welte
2009-01-14 18:42   ` [PATCH] panasonic-laptop.c: add support for optical drive power control Martin Lucina
2009-04-05  4:53     ` Len Brown
2009-04-06 16:22       ` Martin Lucina [this message]
2009-04-07  5:59         ` Len Brown
2009-04-07 23:07       ` Harald Welte

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