From: Matthew Garrett <mjg59@srcf.ucam.org>
To: linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org
Cc: david-b@pacbell.net
Subject: Re: RTC_DRV_CMOS can break userspace interface
Date: Mon, 28 May 2007 00:39:11 +0100 [thread overview]
Message-ID: <20070527233911.GA23491@srcf.ucam.org> (raw)
In-Reply-To: <20070527190351.GA21387@srcf.ucam.org>
On Sun, May 27, 2007 at 08:03:51PM +0100, Matthew Garrett wrote:
> (It doesn't really help that rtc-cmos doesn't load on this machine, but
> I'll try to track that down later - right now I suspect some sort of PNP
> issue)
Ah, no, it's because the ioports for the rtc-cmos driver are already
claimed by the old driver from CONFIG_RTC. The following configuration
is valid in Kconfig:
CONFIG_RTC=y
CONFIG_RTC_CMOS=m
but will disable /proc/acpi/wakeup. It'll also be impossible to load
CONFIG_RTC_CMOS because CONFIG_RTC has grabbed the io ports, so it's not
possible to use the new interface. This situation doesn't appear to be
documented, which is less than ideal...
--
Matthew Garrett | mjg59@srcf.ucam.org
next prev parent reply other threads:[~2007-05-27 23:39 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-27 19:03 RTC_DRV_CMOS can break userspace interface Matthew Garrett
2007-05-27 23:39 ` Matthew Garrett [this message]
2007-05-28 0:38 ` Matthew Garrett
2007-05-28 1:44 ` David Brownell
2007-05-28 2:16 ` Matthew Garrett
2007-05-28 17:24 ` [PATCH] RTC: Use fallback IRQ if PNP tables don't provide one Matthew Garrett
2007-05-28 18:50 ` Matthieu CASTET
2007-05-30 0:30 ` Andrew Morton
2007-05-30 1:02 ` Matthew Garrett
2007-05-28 21:06 ` David Brownell
2007-05-28 1:36 ` RTC_DRV_CMOS can break userspace interface David Brownell
[not found] <8pwhX-46n-3@gated-at.bofh.it>
[not found] ` <8pCQo-5QL-7@gated-at.bofh.it>
[not found] ` <87abvogbdp.fsf@buer.dfakt.de>
2007-05-28 21:06 ` David Brownell
2007-05-31 4:32 ` Tino Keitel
2007-05-31 10:26 ` Matthew Garrett
2007-06-01 7:46 ` Tino Keitel
2007-06-01 12:54 ` Matthew Garrett
2007-06-01 17:11 ` David Brownell
2007-06-04 9:35 ` Tino Keitel
2007-06-04 12:14 ` Matthew Garrett
2007-06-12 18:17 ` Tino Keitel
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