From mboxrd@z Thu Jan  1 00:00:00 1970
From: Anatolij Gustschin <agust@denx.de>
Date: Wed, 22 Apr 2009 20:17:55 +0200
Subject: [U-Boot] NAND on mpc8360erdk
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To: u-boot@lists.denx.de

Hi,

Renaud barbier wrote:
> I am in the middle of NAND debugging on a MPC8544 based system.
>  
> In the following code for the mpc8360erdk, why is there
> the instruction "out_8(upm->io_addr, 0x0);" in the for loop.

it is a dummy write transaction step of the UPM RAM array
programming algorithm to hit the relevant chip select.
Take a look at section '10.4.4.2 Programming the UPMs' of the
MPC8360E Reference Manual, the steps to write the UPM RAM
array are described there.

> Is that board specific?

No.

Anatolij