From: Oliver Rutsch <orutsch@sympatec•com>
To: Linuxppc-dev@ozlabs•org
Subject: Re: MPC5200 I2C and 2.6 kernel
Date: Thu, 29 Nov 2007 12:00:16 +0100 [thread overview]
Message-ID: <474E9BC0.5010806@sympatec.com> (raw)
In-Reply-To: <20071128202245.90051247C1@gemini.denx.de>
Hi,
>> hwclock --debug tells me:
>
>> hwclock: Open of /dev/rtc failed, errno=19: No such device.
>
> Well... did you check how your /dev/rtc is set up? It used to be a
> misc device with MAJ=10 MIN=135 in old kernel versions, but now it's
> MAJ=254 MIN=4, i. e. it should look like this:
>
> crw-r--r-- 1 root root 254, 0 Jun 22 18:30 /dev/rtc
>
Yes this was not correct in my filesystem. But in your filesystem
it looks like MAJ=254 MIN=0. I set MIN to 0 and applied Jon's
suggestions and now it works! So many thanks to Wolfgang and Jon,
this was really a hard problem for me!
But I should mention that I modified my dts for the M41T00 RTC
in the following way:
rtc@68 {
compatible = "stm,m41t00";
reg = <68>;
};
In some piece of an older driver I found the I2C Address for this RTC
(0x68), although the data sheet tells me that the slave address is 0xD0.
However, now it's up and running!
Thanks and bye,
--
Dipl. Ing. Oliver Rutsch
EMail: orutsch@sympatec•com
prev parent reply other threads:[~2007-11-29 11:00 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-27 10:07 MPC5200 I2C and 2.6 kernel Oliver Rutsch
2007-11-28 20:22 ` Wolfgang Denk
2007-11-28 23:54 ` Jon Smirl
2007-11-29 11:00 ` Oliver Rutsch [this message]
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