IMX28 using ubifs(ubi Filesystem)

[sung-ukjang]

i did testing for "mem mode" on NAND Flash imx28 EVM.

normal case, i'm successed mem mode test. But.after mount Ubifs not getting action mem mode. 

This is system log.

rootfs on / type rootfs (rw)

/dev/root on / type ext2 (rw,relatime)

proc on /proc type proc (rw,relatime)

sys on /sys type sysfs (rw,relatime)

tmpfs on /dev type tmpfs (rw,relatime,mode=755)

devpts on /dev/pts type devpts (rw,relatime,mode=600)

tmpfs on /dev/shm type tmpfs (rw,relatime,mode=777)

ubi0_0 on /system/var type ubifs (rw,relatime)

root@freescale /$ echo mem > /sys/power/state.

[  443.290000] Freezing remaining freezable tasks
... (elapsed 0.01 seconds) done.

[  443.310000] Suspending console(s) (use
no_console_suspend to debug) <mem mode entry>

<PSWITCH  wake up>

HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFLC

PowerPrep start initialize power...

Battery Voltage = 4.20V

boot from battery. 5v input not detected

LLLCMay 27 201417:45:47

FRAC 0x92925552

memory type is DDR2

            
Wait for ddr ready 1power 0x00820710

Frac 0x92925552

start change cpu freq

hbus 0x00000003

cpu 0x00010001

LLLLLLLFLC   <- holding,  wating

please help to using Unifs for mem mode.

Thanks.

[GraceH]

Hi Sung-Uk,

Please get the patch in post MX28 resume with NAND after suspend to ram

Grace

[igorpadykov]

Hi Sung-Uk,

issue may be caused by DDR errors please recheck

memory

https://community.freescale.com/message/321913#321913

https://community.freescale.com/docs/DOC-1455

also recheck power supplies: if they are good: filtering,

spikes, current capability.

Best regards

chip

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[sung-ukjang]

Tansk you for your help.

i have question, What is point for DDR errors?

[igorpadykov]

Hi Sung-Uk,

point your comment:

"But.after mount Ubifs not getting action mem mode."

Best regards

chip

[sung-ukjang]

Hi.

After the customer has tested, it has worked well MEM mode in the SD card, however it doesnt work in NAND flash when UBI FS used and it was phenomenon such as power down is OK and power up do not work in NAND flash.

So do you have any data or file when you test file system in NAND flash and have you any test results or data?

If you have tested, what kind of file system you has used?

It is quite urgent for customer development schedule so that please kindly reply to us ASAP to resolve this issues.

Thank you for your help in advance.

[igorpadykov]

Hi

SAMSUNG K9LBG08U0D was tested (ubifs),

as noted in Release Notes document below

L2.6.35_1.1.0_LINUX_DOCS

i.MX28 Linux Documentation Bundle

Best regards

chip

[sung-ukjang]

We are still failed wake up from mem mode.

Can you provide mem-mode enabled kernel Image?

[igorpadykov]

Hi,

L2.6.35_1.1.0_DEMO_IMAGE : i.MX28 Linux Binary Demo Files.

Best regards

chip