* RTC backup on omap3 (overo)
@ 2011-07-05 14:35 ` Gerber Patrick
0 siblings, 0 replies; 4+ messages in thread
From: Gerber Patrick @ 2011-07-05 14:35 UTC (permalink / raw)
To: linux-arm-kernel@lists.infradead.org, linux-omap@vger.kernel.org
Hello every one,
I am using an over Fire with an omap3530. I have added a small Lithium backup battery to the TWL4030 for RTC backup as recommanded by Gumstix.
I have tried to set the time with date command and shutdown the overo and remove power. After restart the date is not the one that I have set but a default one (always the same).
Does anybody have already experienced this ? Do you have any idea ?
Thanks in advance
Patrick
^ permalink raw reply [flat|nested] 4+ messages in thread
* RTC backup on omap3 (overo)
@ 2011-07-05 14:35 ` Gerber Patrick
0 siblings, 0 replies; 4+ messages in thread
From: Gerber Patrick @ 2011-07-05 14:35 UTC (permalink / raw)
To: linux-arm-kernel
Hello every one,
I am using an over Fire with an omap3530. I have added a small Lithium backup battery to the TWL4030 for RTC backup as recommanded by Gumstix.
I have tried to set the time with date command and shutdown the overo and remove power. After restart the date is not the one that I have set but a default one (always the same).
Does anybody have already experienced this ? Do you have any idea ?
Thanks in advance
Patrick
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: RTC backup on omap3 (overo)
2011-07-05 14:35 ` Gerber Patrick
@ 2011-07-05 15:36 ` Baruch Siach
-1 siblings, 0 replies; 4+ messages in thread
From: Baruch Siach @ 2011-07-05 15:36 UTC (permalink / raw)
To: Gerber Patrick
Cc: linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Hi Patrick,
On Tue, Jul 05, 2011 at 02:35:12PM +0000, Gerber Patrick wrote:
> I am using an over Fire with an omap3530. I have added a small Lithium
> backup battery to the TWL4030 for RTC backup as recommanded by Gumstix.
> I have tried to set the time with date command and shutdown the overo and
> remove power. After restart the date is not the one that I have set but a
> default one (always the same).
>
> Does anybody have already experienced this ? Do you have any idea ?
Do 'hwclock -w' to set the RTC clock from the system clock. This should do the
trick, assuming that you have the RTC driver compiled, or loaded as a module.
baruch
--
~. .~ Tk Open Systems
=}------------------------------------------------ooO--U--Ooo------------{=
- baruch@tkos.co.il - tel: +972.2.679.5364, http://www.tkos.co.il -
^ permalink raw reply [flat|nested] 4+ messages in thread* RTC backup on omap3 (overo)
@ 2011-07-05 15:36 ` Baruch Siach
0 siblings, 0 replies; 4+ messages in thread
From: Baruch Siach @ 2011-07-05 15:36 UTC (permalink / raw)
To: linux-arm-kernel
Hi Patrick,
On Tue, Jul 05, 2011 at 02:35:12PM +0000, Gerber Patrick wrote:
> I am using an over Fire with an omap3530. I have added a small Lithium
> backup battery to the TWL4030 for RTC backup as recommanded by Gumstix.
> I have tried to set the time with date command and shutdown the overo and
> remove power. After restart the date is not the one that I have set but a
> default one (always the same).
>
> Does anybody have already experienced this ? Do you have any idea ?
Do 'hwclock -w' to set the RTC clock from the system clock. This should do the
trick, assuming that you have the RTC driver compiled, or loaded as a module.
baruch
--
~. .~ Tk Open Systems
=}------------------------------------------------ooO--U--Ooo------------{=
- baruch at tkos.co.il - tel: +972.2.679.5364, http://www.tkos.co.il -
^ permalink raw reply [flat|nested] 4+ messages in thread
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2011-07-05 14:35 RTC backup on omap3 (overo) Gerber Patrick
2011-07-05 14:35 ` Gerber Patrick
2011-07-05 15:36 ` Baruch Siach
2011-07-05 15:36 ` Baruch Siach
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