From: johan.adolfsson@axis.com
To: "Grant Erickson" <erick205@umn.edu>,
"Linux I2C Mailing List" <linux-i2c@pelican.tk.uni-linz.ac.at>,
"Linux/PPC Embedded Mailing List"
<linuxppc-embedded@lists.linuxppc.org>,
"Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>
Subject: Re: Kernel Real Time Clock (RTC) Support for I2C Devices
Date: Thu, 19 Apr 2001 13:33:35 +0200 [thread overview]
Message-ID: <02cb01c0c8c4$92ee2640$85b270d5@homeip.net> (raw)
In-Reply-To: <Pine.SOL.4.20.0104181408540.10793-100000@garnet.tc.umn.edu>
Support for DS1302 is available in the CRIS port.
A patch for 2.4.3 (and a lot of other stuff you don't need) is available in
http://developer.axis.com/download/devboard_lx/R1_0_0/
/Johan
----- Original Message -----
From: Grant Erickson <erick205@umn.edu>
To: Linux I2C Mailing List <linux-i2c@pelican.tk.uni-linz.ac.at>; Linux/PPC
Embedded Mailing List <linuxppc-embedded@lists.linuxppc.org>; Linux Kernel
Mailing List <linux-kernel@vger.kernel.org>
Sent: Wednesday, April 18, 2001 9:13 PM
Subject: Kernel Real Time Clock (RTC) Support for I2C Devices
> I have been unable to find an answer for this in the LKML archives, so I
> am hoping someone on this list might perhaps have some insight or pointers
> thereto on this question.
>
> I have an embedded board with a PowerPC 405GP on which Linux 2.4.2
> (MontaVista's version thereof) is running swimmingly. Attached to that
> PowerPC's I2C controller is a Dallas DS1307 I2C RTC.
>
> >From the looks of drivers/char/rtc.c it would appear that this kernel
> driver only supports bus-attached RTCs such as the mentioned MC146818. Is
> this correct?
>
> What is the correct access method / kernel tie-in for supporting such an
> I2C-based RTC device using the "standard" interfaces?
>
> My hope is to use 'hwclock' from util-linux w/o modification. Is this
> reasonable?
>
> Thanks,
>
> Grant Erickson
>
>
> --
> Grant Erickson University of Minnesota Alumni
> o mail:erick205@umn.edu 1996 BSEE
> o http://www.umn.edu/~erick205 1998 MSEE
>
>
> -
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> Please read the FAQ at http://www.tux.org/lkml/
>
prev parent reply other threads:[~2001-04-19 11:31 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-04-18 19:13 Grant Erickson
2001-04-18 19:35 ` Gabriel Paubert
2001-04-18 19:40 ` Wolfgang Denk
2001-04-19 11:33 ` johan.adolfsson [this message]
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