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armv8: ls2085a: Update README file for NAND boot

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Update README file to note LS2088A and LS1088A don't support booting
from NAND flash.

Signed-off-by: York Sun <york.sun@nxp.com>
This commit is contained in:
York Sun 2017-12-07 14:37:40 -08:00
parent 63143a5f92
commit f440aba172
1 changed files with 5 additions and 3 deletions
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8
arch/arm/cpu/armv8/fsl-layerscape/doc/README.lsch3
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@ -154,8 +154,8 @@ Booting from NAND
-------------------
Booting from NAND requires two images, RCW and u-boot-with-spl.bin.
The difference between NAND boot RCW image and NOR boot image is the PBI
command sequence. Below is one example for PBI commands for QDS which uses
NAND device with 2KB/page, block size 128KB.
command sequence. Below is one example for PBI commands for LS2085AQDS which
uses NAND device with 2KB/page, block size 128KB.
1) CCSR 4-byte write to 0x00e00404, data=0x00000000
2) CCSR 4-byte write to 0x00e00400, data=0x1800a000
@ -188,7 +188,7 @@ nand write <u-boot image in memory> 200000 <size of u-boot image>
With these two images in NAND device, the board can boot from NAND.
Another example for RDB boards,
Another example for LS2085ARDB boards,
1) CCSR 4-byte write to 0x00e00404, data=0x00000000
2) CCSR 4-byte write to 0x00e00400, data=0x1800a000
@ -201,6 +201,8 @@ nand write <u-boot image in memory> 80000 <size of u-boot image>
Notice the difference from QDS is SRC, SRC_ADDR and the offset of u-boot image
to match board NAND device with 4KB/page, block size 512KB.
Note, LS2088A and LS1088A don't support booting from NAND.
Booting from SD/eMMC
-------------------
Booting from SD/eMMC requires two images, RCW and u-boot-with-spl.bin.