The ds1337 chip on fsl_mp8313E RDB REVA 3 doesn't work properly
Kim Phillips
kim.phillips at freescale.com
Fri Sep 21 03:19:12 EST 2007
On Thu, 20 Sep 2007 17:09:15 +0800
Andrew Liu <shengping.liu at 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
More information about the Linuxppc-embedded
mailing list