From mboxrd@z Thu Jan  1 00:00:00 1970
From: Anatolij Gustschin <agust@denx.de>
Date: Thu, 25 May 2017 10:57:54 +0200
Subject: [U-Boot] i.Mx6q u-boot stuck
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On Wed, 24 May 2017 18:29:50 +0200
Fausto Sessego fausto.sessego at infomob.it wrote:
...
> The Kernel doesn't start.
> 
> U-Boot 2016.07 (May 24 2017 - 17:11:18 +0200)
> 
> CPU:   Freescale i.MX6Q rev1.2 at 792MHz
> CPU:   Industrial temperature grade (-40C to 105C) at 20C
> Reset cause: POR
> Board: i.MX6Q TIBIDABO
> Support: http://www.infomob.it/
> I2C:   ready
> DRAM:  gd->ram_size: 2147483648
> DRAM test not implemented!
> 2 GiB
> MMC:   FSL_SDHC: 0, FSL_SDHC: 1
> *** Warning - bad CRC, using default environment

you didn't save the environment, so the default environment is
used.

> In:    serial
> Out:   serial
> Err:   serial
> Net:   FEC [PRIME]
> Error: FEC address not set.
> 
> Hit any key to stop autoboot:  0
> reading imx6q-tibidabo.dtb
> 29640 bytes read in 22 ms (1.3 MiB/s)
> reading uImage
> 6621928 bytes read in 324 ms (19.5 MiB/s)
> ## Booting kernel from Legacy Image at 12000000 ...
>    Image Name:   Linux-4.1.38
>    Image Type:   ARM Linux Kernel Image (uncompressed)
>    Data Size:    6621864 Bytes = 6.3 MiB
>    Load Address: 10008000
>    Entry Point:  10008000
>    Verifying Checksum ... OK
>    Loading Kernel Image ... OK
> 
> Starting kernel ...

Please check 'bootargs' environment variable (print bootargs).
It should contain "console=ttymxc0,115200" among other values.
Probably this is not set in the default environment and is missing.
Ensure that you are passing the correct console string for your
board in bootargs. I'm not sure if ttymxc0 is correct, please
test it first.

--
Anatolij