Dear John Tobias,
In message BANLkTinn5oA711EuOELQeNRk2uYQ1N4+nw@mail.gmail.com you wrote:
I am going to use the OTP register to put a unique ID of the board. In order to do that, I don't have to boot the OS if I need to read/write the unique ID of the board.
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On Mon, Jun 6, 2011 at 2:12 PM, Wolfgang Denk wd@denx.de wrote:
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Could you please explain why this cannot be done in the OS driver initialization code as well?
Well, this is obviously nowhere needed for U-Boot operation, and you also don't need this in U-Boot to boot your OS.
See bullet # 2 at http://www.denx.de/wiki/view/U-Boot/DesignPrinciples#2_Keep_it_Fast : We don't initialize things in U-Boot, that are not needed here, unless there is a very good reason for it.
In your case, such initialization should be done in the OS device driver. Leave it out of U-Boot.
Best regards,
Wolfgang Denk