[U-Boot] NAND on mpc8360erdk

[Anatolij Gustschin]

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