[Letux-kernel] U-Boot Watchdog?

Belisko Marek marek.belisko at gmail.com
Sat Mar 18 08:44:31 CET 2017


Hi Nikolaus,

On Sat, Mar 18, 2017 at 8:25 AM, H. Nikolaus Schaller <hns at goldelico.com> wrote:
>
>> Am 18.03.2017 um 07:28 schrieb Belisko Marek <marek.belisko at gmail.com>:
>>
>> Hi Nikolaus,
>>
>> On Fri, Mar 17, 2017 at 11:27 PM, H. Nikolaus Schaller
>> <hns at goldelico.com> wrote:
>>>
>>>> Am 17.03.2017 um 23:09 schrieb H. Nikolaus Schaller <hns at goldelico.com>:
>>>>
>>>> Have found it :)
>>>>
>>>> The ca. 9 seconds was the hint...
>>>>
>>>> The PCB didn't fit exactly in the case and hence the Power button was
>>>> always pressed. This triggers the 8-seconds emergency power-down - after
>>>> enabling it by MLO which differs a little in timing between NAND and MMC
>>>> boot.
>>>>
>>>> Ok. We have learned something :)
>>>
>>> And I finally have again a completely working GTA04A4 for testing the most recent
>>> hw-test tool. I have two other GTA04A3 where WLAN or Bluetooth is broken...
>> Great.
>>>
>>> There is only one remaining issue with our latest U-Boot and Kernel: the NAND
>>> ECC mode does not match between U-Boot and Kernel (OneNAND has no choice for that).
>> Probably ECC options are different between u-boot and kernel (dts)?
>
> Yes, they disagree.
>
> The question is how to make them agree...
>
> AFAIR, MLO must have some specific ECC enabled while the other partitions are a
> little more configurable.
>
> The main problem seems to be that the kernel does not have ECC specification for
> individual partitions but only for the full chip. This means there is no real
> flexibility if we want to load MLO from NAND.
>
> Maybe we can look into the BeagleBoard setup?
>
> @Marek: if you have a little time, could you help to research the settings?
Yes I'll look on that and get back with findings.
>
> BR,
> Nikolaus
>
>
>>>
>>> Therefore I currently can't read the U-Boot environment (fw_printenv) and flash
>>> kernel/NAND rootfs from the kernel.
>>>
> _______________________________________________
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BR,

marek

-- 
as simple and primitive as possible
-------------------------------------------------
Marek Belisko - OPEN-NANDRA
Freelance Developer

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