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Altera_Forum's avatar
Altera_Forum
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19 years ago

How to add second flash to MTD

I am using a board with 2 16 MB CFI flashes. Flash 1 at 0x0 and Flash at 0x02000000. uClinux detects flash 1 and does not detect flash 2. I am using microtronix map where i see, It sends dat...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
19 years ago

1. You may try concat the two chips into a virtual one. (But I didn't try any of them)

Drivers--> Memory Technology Devices (MTD) -->

[*] MTD concatenating support

search "concat" in dir linux-2.6.x/drivers/mtd/maps, and you can find more examples, cevia.c.

http://www.sysgo.com/fileadmin/user_upload.../mtd-concat.pdf (http://www.sysgo.com/fileadmin/user_upload/appnotes/mtd-concat.pdf)

2. Or use them seperately.

You will may use the second flash chip's address and size, ie, na_cfi_flash_1, to declare the second map_info.

And define the second mtd_partition.

Then add them after the first.