nandsim configuration question

Hi

I'm trying to use the nandsim but unfortunately encountered some difficulties in configuring it. I need to simulate mtd device with the following parameters:

Eraseblock size:                131072 bytes, 128.0 KiB
Minimum input/output unit size: 2048 bytes
Sub-page size:                  2048 bytes
OOB size:                       64 bytes
Bad blocks are allowed:         true
Device is writable:             true
Default UBI VID header offset:  2048
Default UBI data offset:        4096
Default UBI LEB size:           126976 bytes, 124.0 KiB
Maximum UBI volumes count:      128

I can't figure out how to set sub-page size to 2048. Or basically - how to disable sub-page support?

I found only usage examples so I'm using the following command:
modprobe nandsim first_id_byte=0x20 second_id_byte=0xaa third_id_byte=0x00 fourth_id_byte=0x15 overridesize=12 cache_file=cashe_file.txt

the mtd device created is:

Name:                           NAND simulator partition 0
Type:                           nand
Eraseblock size:                131072 bytes, 128.0 KiB
Amount of eraseblocks:          4096 (536870912 bytes, 512.0 MiB)
Minimum input/output unit size: 2048 bytes
Sub-page size:                  512 bytes
OOB size:                       64 bytes
Bad blocks are allowed:         true
Device is writable:             true
Default UBI VID header offset:  512
Default UBI data offset:        2048
Default UBI LEB size:           129024 bytes, 126.0 KiB
Maximum UBI volumes count:      128

How do I set sub-page size to 2048?

Thanks!
Tanya Brokhman

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