imx53-QSRB VFS: Cannot open root device "(null)" or unknown-block(0,0): error -6

[nabilb]

Hello guys,

I am trying to boot my imx53-qsrb. I'm using a 4.0 kernel. I built u-boot, my kernel put the binaries on a fat16 partition of my Micro SD card. I downloaded a debian rootfs that I put it on the ext4 partition of my sd card. After booting my board here is the output :

U-Boot 2015.04-dirty (May 11 2015 - 15:58:04)
Board: MX53 LOCO
I2C:   ready
DRAM:  1 GiB
MMC:   FSL_SDHC: 0, FSL_SDHC: 1
In:	serial
Out:   serial
Err:   serial
Net:   FEC
Hit any key to stop autoboot:  0
switch to partitions #0, OK
mmc0 is current device
SD/MMC found on device 0
Checking for: /uEnv.txt ...
reading /uEnv.txt
570 bytes read in 11 ms (49.8 KiB/s)
Loaded environment from /uEnv.txt
Checking if uenvcmd is set ...
Running uenvcmd ...
reading zImage
5679310 bytes read in 115 ms (47.1 MiB/s)
** No boot file defined **
Kernel image @ 0x70010000 [ 0x000000 - 0x5653c0 ]

Starting kernel ...

...

...

...

...

VFS: Cannot open root device "(null)" or unknown-block(0,0): error -6

Please append a correct "root=" boot option; here are the available partitions:

...

...

b302	3837952 mmcblk0p2 b984de4c-02

[	2.044505] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
[	2.052784] drm_kms_helper: panic occurred, switching back to text console
[	2.060619] ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)

[   25.153014] random: nonblocking pool is initialized

Thanks

[igorpadykov]

Hi Nabil

had you tried to add to kernel boot line

rootfstype=ext4

Best regards

igor

[nabilb]

Hi Igor,

Yes, I did that, here is my uEnv.txt :

#u-boot mmc (SDcard) boot

kernel_file= zImage

#mmc (SDcard for bbb) parameters

mmcdev=0

mmcpart=1

loadzimage=load mmc ${mmcdev}:${mmcpart} ${loadaddr} ${kernel_file}

loadfdt=load mmc ${mmcdev}:${mmcpart} ${fdtaddr} ${fdtfile}

#systemd boot

optargs=quiet init=/hello_s.out

console=ttyO0,115200n8

mmcroot=/dev/mmcblk0p2 rw

mmcrootfstype=ext4 rootwait fixrtc

mmcargs=setenv bootargs console=${console} root=${mmcroot} rootfstype=${mmcrootfstype} ${optargs}

#boot commands for compressed image kernel

uenvcmd=run loadzimage; run loadfdt; run mmcargs; bootz ${loadaddr} - ${fdtaddr}

In the first partition mmcblk0p1 I have my uEnv.txt and my zImage (I used a zImage combined with th fdt). In the second partition mmcblk0p2 I have the my rootfs. I tried with both, debian and a hello_s.out file which is a hello_world statically compiled. I always got he same error.

Nabil