NAND Size

mike A

Genius 3490 points

Hi,

I have a micron nand flash on custom dm8148 board, which is 4gb but when uboot comes up it detects NAND aswell

but the size detected is 512Mib, how to configure the uboot and linux to say that the NAND flash is 4Gb ?

Thanks & Regards,

Mike

over 10 years ago

0 Muhammad Ali3 over 10 years ago

Expert 1695 points

Hi,

what version of you u-boot are you using. I had the same problem with mine on custom board. I was using u-boot 2014.10. The issue was to do with get_board_mem_timings

you need to add the case for correct manufacturer and id which can be obtained from include/linux/mtd/nand.h and drivers/mtd/nand/nand_id.c

0 mike A over 10 years ago in reply to Muhammad Ali3

Genius 3490 points

Hi,

I am using the ezsdk release from TI. I see that manufacturer and device id is getting detected correctly (2c and dc repsectively {"NAND 512MiB 3,3V 8-bit", 0xDC, 0, 512, 0, LP_OPTIONS}), but when I do nand erase which erases entire chip ,

NAND erase: device 0 whole chip
Erasing at 0x1ffe0000 -- 100% complete.
OK

But it erases only 512Mib, but it should erase 4Gb ?

Am I a missing something ?

Thanks & Regards,

Mike

0 Titusrathinaraj Stalin over 10 years ago

TI__Guru** 116100 points

Hi Mike,

4Gb or 4GB ?

1Gbit = 128MB

So, 4Gbit (4Gb) is equal to 512MB (mega byte) only.

Please refer to the NAND data sheet to know about your size of flash.

0 mike A over 10 years ago in reply to Titusrathinaraj Stalin

Genius 3490 points

Thanks Titusthinaraj!

it is a 4Gb Nand flash.

Thanks & Regards,

Mike

0 mike A over 10 years ago in reply to mike A

Genius 3490 points

Hi Titusthinaraj,

It is a 4Gb flash size and uboot is detecting as 512Mib is that correct ?

Thanks & Regards,

Mike

0 Titusrathinaraj Stalin over 10 years ago in reply to mike A

TI__Guru** 116100 points

Yes you are right.

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NAND Size