In message 000201c34149$a33d7dc0$a865a8c0@ThinkPadX31 you wrote:
How could I turn on the MTD support in u-boot? I don¡¦t know how to do that?
There is no MTD support in U-Boot. MTD is a software layer whcih is used in Linux. U-Boot does not use anything like that.
I want to use the setenv command to set (assume I used 32MB Flash) mtd0 0x00000000,0x00040000 ¡÷ u-boot mtd1 0x00040000,0x000E0000 ¡÷ kernel mtd2 0x000E0000,0x01F00000 ¡÷ filesystem mtd3 0x01F00000,0x01FF0000 ¡÷ reserved the left space 0x01FF0000,0x02000000 ¡÷ for env Then the kernel will get those parameters to set MTD. Can I do that and not need to modify u-boot ?
There are several ways to do that, and none of them require to modify U-Boot.
Option 1 is to use a static "partition" map; to do so you will have to provide a MTD map file for your board in the Linux kernel tree (directory drivers/mtd/maps/).
Option 2 is to use command line partition table parsing (option CONFIG_MTD_CMDLINE_PARTS) and provide the required boot arguments on the Linux command line.
Best regards,
Wolfgang Denk