* [U-Boot] Boot count support on P1020
@ 2011-01-26 20:43 Felix Radensky
2011-01-26 21:32 ` Kumar Gala
0 siblings, 1 reply; 6+ messages in thread
From: Felix Radensky @ 2011-01-26 20:43 UTC (permalink / raw)
To: u-boot
Hi,
I'd like to enable boot count feature on custom P1020 based board.
If my understanding is correct, the implementation requires some
register or memory location that preserves its value across reboots.
Can Freescale folks on the list please point to such location in P1/P2
SoCs.
Thanks a lot.
Felix.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [U-Boot] Boot count support on P1020
2011-01-26 20:43 [U-Boot] Boot count support on P1020 Felix Radensky
@ 2011-01-26 21:32 ` Kumar Gala
2011-01-26 22:00 ` Wolfgang Denk
0 siblings, 1 reply; 6+ messages in thread
From: Kumar Gala @ 2011-01-26 21:32 UTC (permalink / raw)
To: u-boot
On Jan 26, 2011, at 2:43 PM, Felix Radensky wrote:
> Hi,
>
> I'd like to enable boot count feature on custom P1020 based board.
> If my understanding is correct, the implementation requires some
> register or memory location that preserves its value across reboots.
>
> Can Freescale folks on the list please point to such location in P1/P2
> SoCs.
>
> Thanks a lot.
What kinda reset do you expect to occur? Depending on this the answer might be that we dont have any such registers that persist across reboots.
- k
^ permalink raw reply [flat|nested] 6+ messages in thread
* [U-Boot] Boot count support on P1020
2011-01-26 21:32 ` Kumar Gala
@ 2011-01-26 22:00 ` Wolfgang Denk
2011-01-27 3:29 ` Kumar Gala
0 siblings, 1 reply; 6+ messages in thread
From: Wolfgang Denk @ 2011-01-26 22:00 UTC (permalink / raw)
To: u-boot
Dear Kumar Gala,
In message <C2AA15B2-FD90-45EA-A9B1-8B1E6FA4B143@kernel.crashing.org> you wrote:
>
> What kinda reset do you expect to occur? Depending on this the answer might be that we dont have any such registers that persist across reboots.
external hard reset ?
Best regards,
Wolfgang Denk
--
DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
Q: Why do PCs have a reset button on the front?
A: Because they are expected to run Microsoft operating systems.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [U-Boot] Boot count support on P1020
2011-01-26 22:00 ` Wolfgang Denk
@ 2011-01-27 3:29 ` Kumar Gala
2011-01-27 9:30 ` Felix Radensky
2011-01-27 10:52 ` Wolfgang Denk
0 siblings, 2 replies; 6+ messages in thread
From: Kumar Gala @ 2011-01-27 3:29 UTC (permalink / raw)
To: u-boot
On Jan 26, 2011, at 4:00 PM, Wolfgang Denk wrote:
> Dear Kumar Gala,
>
> In message <C2AA15B2-FD90-45EA-A9B1-8B1E6FA4B143@kernel.crashing.org> you wrote:
>>
>> What kinda reset do you expect to occur? Depending on this the answer might be that we dont have any such registers that persist across reboots.
>
> external hard reset ?
If so, there isnt any state saved across such a reset in the SoC
- k
^ permalink raw reply [flat|nested] 6+ messages in thread
* [U-Boot] Boot count support on P1020
2011-01-27 3:29 ` Kumar Gala
@ 2011-01-27 9:30 ` Felix Radensky
2011-01-27 10:52 ` Wolfgang Denk
1 sibling, 0 replies; 6+ messages in thread
From: Felix Radensky @ 2011-01-27 9:30 UTC (permalink / raw)
To: u-boot
Hi Kumar,
On 01/27/2011 05:29 AM, Kumar Gala wrote:
> On Jan 26, 2011, at 4:00 PM, Wolfgang Denk wrote:
>
>> Dear Kumar Gala,
>>
>> In message<C2AA15B2-FD90-45EA-A9B1-8B1E6FA4B143@kernel.crashing.org> you wrote:
>>> What kinda reset do you expect to occur? Depending on this the answer might be that we dont have any such registers that persist across reboots.
>> external hard reset ?
> If so, there isnt any state saved across such a reset in the SoC
>
> - k
Thanks a lot for a prompt reply. Looks like a have to use board I2C EEPROM
to save state across reboots.
Felix.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [U-Boot] Boot count support on P1020
2011-01-27 3:29 ` Kumar Gala
2011-01-27 9:30 ` Felix Radensky
@ 2011-01-27 10:52 ` Wolfgang Denk
1 sibling, 0 replies; 6+ messages in thread
From: Wolfgang Denk @ 2011-01-27 10:52 UTC (permalink / raw)
To: u-boot
Dear Kumar Gala,
In message <087EF8C3-9D3F-4228-8DB8-C8F8EF61BADF@kernel.crashing.org> you wrote:
>
> > external hard reset ?
>
> If so, there isnt any state saved across such a reset in the SoC
Hm, so really all registers are explicitly initialized? What a pitty.
Best regards,
Wolfgang Denk
--
DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
When some people discover the truth, they just can't understand why
everybody isn't eager to hear it.
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2011-01-27 10:52 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
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2011-01-26 20:43 [U-Boot] Boot count support on P1020 Felix Radensky
2011-01-26 21:32 ` Kumar Gala
2011-01-26 22:00 ` Wolfgang Denk
2011-01-27 3:29 ` Kumar Gala
2011-01-27 9:30 ` Felix Radensky
2011-01-27 10:52 ` Wolfgang Denk
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