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board/ti/am335x/README: Document NAND programming 

The AM335x GP EVM ships with NAND.  Document programming of the chip
including the redundant locations that the ROM will check.

Signed-off-by: Tom Rini <trini@ti.com>
This commit is contained in:
Tom Rini 2013-07-17 12:24:30 -04:00
parent ea70690d66
commit 97559b5203
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@ -13,6 +13,30 @@ documented in TI's reference designs:
- AM335x EVM SK
- Beaglebone White
- Beaglebone Black
'
NAND
====
The AM335x GP EVM ships with a 256MiB NAND available in most profiles. In
this example to program the NAND we assume that an SD card has been
inserted with the files to write in the first SD slot and that mtdparts
have been configured correctly for the board. As a time saving measure we
load MLO into memory in one location, copy it into the three locatations
that the ROM checks for additional valid copies, then load U-Boot into
memory. We then write that whole section of memory to NAND.
U-Boot # mmc rescan
U-Boot # env default -f -a
U-Boot # nand erase.chip
U-Boot # saveenv
U-Boot # load mmc 0 81000000 MLO
U-Boot # cp.b 81000000 81020000 20000
U-Boot # cp.b 81000000 81040000 20000
U-Boot # cp.b 81000000 81060000 20000
U-Boot # load mmc 0 81080000 u-boot.img
U-Boot # nand write 81000000 0 260000
U-Boot # load mmc 0 ${loadaddr} uImage
U-Boot # nand write ${loadaddr} kernel 500000
Falcon Mode
===========