linux-kernel - Re: RTC_DRV_CMOS can break userspace interface

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Date:	Tue, 12 Jun 2007 20:17:32 +0200
From:	Tino Keitel <tino.keitel@....de>
To:	Matthew Garrett <mjg59@...f.ucam.org>
Cc:	Linux Kernel list <linux-kernel@...r.kernel.org>
Subject: Re: RTC_DRV_CMOS can break userspace interface

On Mon, Jun 04, 2007 at 13:14:58 +0100, Matthew Garrett wrote:
> On Mon, Jun 04, 2007 at 11:35:18AM +0200, Tino Keitel wrote:
>
> (By the way, it helps if you Cc: me - it's easy to lose track of
> things
> in the LKML noise)
>
> > Here it is:
> >
> > state = active
> > io 0x70-0x77
> > options
>
> Yes, there's no IRQ listed. Can you try current git?

OK, it works with git 99f9f3d49cbc7d944476f6fde53a77ec789ab2aa
(something after -rc4). I can echo something into
/sys/class/rtc/rtc0/wakealarm and the machine will wake up from suspend
to RAM.

However, a minor glitch remains:

$ echo 1181672013 > /sys/class/rtc/rtc0/wakealarm

- suspend

- wait for wakeup

After wakeup:

$ cat /sys/class/rtc/rtc0/wakealarm
2051656909

Regards,
Tino
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