[PATCH v8 0/3] add the GPMI controller driver for IMX23/IMX28

[Huang Shijie]

hi:
>
>> The following is my test environment:
>> [0] Hardware:
>>        MX23EVK PCB REV C
> I have the same hardware. But also on our own hardware (mx23, but
> different dram and different nand) it's failing with the same output
> as on the evk (see log file in previous mail).
I will check the schematic of mx23 tomorrow, and find what will cause 
conflict with GPMI.
>> [1] SW:
>>     kernel:git://git.linaro.org/people/shawnguo/linux-2.6.git mxs-gpmi
>>     .config: my_config , you can find it in my previous email.
>>     cmdline: console=ttyAMA0,115200 root=/dev/mmcblk0p1 rw rootwait
>> gpmi_debug_init mtdparts=gpmi-nand:20m(boot),-(user)
> I use that git and your config file. Only thing i have changed to the
> config is to integrate the initramfs rootfs.
> Would it be possible for you to test using rootfs in initramfs? Now
could you tell me how can i test the rootfs in initramfs?
I have no idea about how to test it.


> you are using the mmc card as rootfs which is on the dma engine and
> bus.
>
>
>> [2] test shell script:
>> ================================
>>
>> echo 0x20>  /sys/module/gpmi_nand/parameters/gpmi_debug
> As said, don't have that gpmi_debug sysfs entry. Sure you don't have
> any other modification done which are not in that git branch?
The sysfs entry does exit.
Please check carefully.
The code in gpmi-nand.c defines it.


>> flash_eraseall /dev/mtd1
>> ubiformat /dev/mtd1
>> flash_eraseall /dev/mtd1
>> ubiattach /dev/ubi_ctrl -m 1
>> ubimkvol /dev/ubi0 -N test -m
>> mount -t ubifs ubi0:test tmp
>> bonnie++ -d tmp -u 0 -s 2 -r 1
>> bonnie++ -d tmp -u 0 -s 2 -r 1
>> bonnie++ -d tmp -u 0 -s 2 -r 1
>> umount tmp
>> ubidetach /dev/ubi_ctrl -m 1
>>
>> ================================
>>
>> [3] conclusion
>>    It runs well in my mx23 board, and no DMA-TIMEOUT occur.
>> I think there is some conflict in your board.
> Don't know what conflict I would have with my board. I just use the
> board without anything (mmc, lcd, ...) attached to it.
>
>> BTW:
>>    I split the MTD to 20M and (the rest size).
> So do I.
>
>> The flash_eraseall works well.
>> If i do not split the MTD, the flash_eraseall will not work.
> That's strange because I use flash_eraseall on my mtd1 which is 108 MB.
> I don't know how you boot but my uboot is in mtd0, so don't use that
I boot the kernel by the USB with sb_loader.

Best Regards
Huang Shijie