[Buildroot] Olimex A20 Micro - freezing during boot up
Kevin Golding
kevin at kgolding.co.uk
Fri Sep 18 11:07:04 UTC 2015
Thank you for the reply. You were right about the hardware, I got a
second board and it boots up without those errors so my first board must
have a fault on it.
Many thanks,
Kevin Golding
On 17/09/2015 23:36, Arnout Vandecappelle wrote:
> On 16-09-15 16:45, Kevin Golding wrote:
>> Hello,
>>
>> I've created a system based on the olimex_a20_olinuxino_micro_defconfig
> When you say "based on", do you mean "equal to"? If not, go back to the
> defconfig and check if that works. Don't hold your breath, though - see below.
>
>
>> and I'm
>> seeing it freeze at around 1.2 seconds during the boot up.
>>
>> I'm a little worried about some of the errors during the boot such as "Failed to
>> set core voltage! Can't set CPU frequency"
> This is potentially harmful.
>
>> "*** Warning - bad CRC, using default environment"
> This is quite harmless: U-Boot tries to read the environment from flash, but
> it's not there (yet) because you never saved it.
>
>> but as a complete newbie I'm not sure how important they are!
>>
>> I've copied the serial capture below, and I would love to get my hands of
>> someone's working equivalent to compare against, or any suggestions/advice?
>>
>> Thanks,
>>
>> Kevin
>>
>> --------------------------- Serial capture below -------------------------------
>>
>> U-Boot SPL 2015.04 (Sep 16 2015 - 09:57:21)
>> DRAM: 1024 MiB
>> Failed to set core voltage! Can't set CPU frequency
>>
>>
> [snip]
>> [ 1.073035] axp20x 0-0034: AXP20x variant AXP209 found
>> [ 1.078689] axp20x 0-0034: Failed to set masks in 0x40: -6
>> [ 1.084264] axp20x 0-0034: failed to add irq chip: -6
> This looks potentially problematic. The AXP is the PMIC, i.e. the thing that
> regulates the voltages to your CPU. If that thing is not working correctly,
> things go very bad.
>
>> [ 1.092777] sunxi-wdt 1c20c90.watchdog: Watchdog enabled (timeout=16 sec,
>> nowayout=0)
>> [ 1.101056] Driver 'mmcblk' needs updating - please use bus_type methods
>> [ 1.108745] sunxi-mmc 1c0f000.mmc: No vqmmc regulator found
>> [ 1.114990] sunxi-mmc 1c0f000.mmc: Got CD GPIO
>> [ 1.150750] sunxi-mmc 1c0f000.mmc: base:0xf00b8000 irq:27
>> [ 1.157146] sunxi-mmc 1c12000.mmc: No vqmmc regulator found
>> [ 1.163483] sunxi-mmc 1c12000.mmc: Got CD GPIO
>> [ 1.200758] sunxi-mmc 1c12000.mmc: base:0xf00bc000 irq:28
>> [ 1.208924] usbcore: registered new interface driver usbhid
>> [ 1.214589] usbhid: USB HID core driver
>> [ 1.220243] TCP: cubic registered
>> [ 1.223677] NET: Registered protocol family 17
>> [ 1.228168] mmc0: host does not support reading read-only switch, assuming
>> write-e
> It's even stopping in the middle of a printk...
>
> Smells to me like a hardware issue: insufficient current or possibly even
> overheating. Do you have another board to test?
>
> Regards,
> Arnout
>
>
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