From: Kim Phillips <kim.phillips@freescale.com>
To: Andrew Liu <shengping.liu@windriver.com>
Cc: linuxppc-embedded@ozlabs.org
Subject: Re: The ds1337 chip on fsl_mp8313E RDB REVA 3 doesn't work properly
Date: Thu, 20 Sep 2007 12:19:12 -0500 [thread overview]
Message-ID: <20070920121912.672c7ed2.kim.phillips@freescale.com> (raw)
In-Reply-To: <46F238BB.4040007@windriver.com>
On Thu, 20 Sep 2007 17:09:15 +0800
Andrew Liu <shengping.liu@windriver.com> wrote:
> Hello All,
> The same u-boot/kernel/rootfs on fsl_mp8313E RDB REVA 2, DS1337 RTC
> chip can work,
> but on sl_mp8313E RDB REVA 3, it doesn't work, its time don't change.
>
> This RTC chip specific bad behavior on sl_mp8313E RDB REVA 3 as follows:
> (1) On U-Boot (from Freescale), run command:
> => i2c md 0x68 0x0
> 0000: 32 33 10 04 20 89 08 84 00 20 53 00 42 16 18 80 23.. .... S.B...
looks like your oscillator is turned off (80 in status reg).
There are many reasons this can happen - google for 'dallas 1337 rtc'
for the chip's documentation to help you diagnose.
Kim
prev parent reply other threads:[~2007-09-20 17:19 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-20 9:09 The ds1337 chip on fsl_mp8313E RDB REVA 3 doesn't work properly Andrew Liu
2007-09-20 17:19 ` Kim Phillips [this message]
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