[U-Boot] [PATCH v3] Add support for MINI2440 (s3c2440). Documentation about the product can be found on: http://www.friendlyarm.net/products/mini2440

[Ilya Averyanov]

2012/4/20 Marek Vasut <marex at denx.de>

> Dear Ilya Averyanov,
>
> [...]
>
> > > > > > > > .word 0x32
> > > > > > > > +    .word 0x30
> > > > > > > > +    .word 0x30
> > > > > > >
> > > > > > > What this undocumented stuff?
> > > > > >
> > > > > > SoC specific, I pasted it from smdk2410, it's for initialize the
> > >
> > > DRAM.
> > >
> > > > > Can't you init DRAM in some more fitting place? Also document this?
> > > >
> > > > I don't know, this part is a bit difficult for me, but I'm going to
> try
> > > > to document it with the help of the SoC documentation.
> > > >
> > > > For the place, should I move it to mini2440.c in arch_cpu_init() or
> > > > board_early_init_f() ? I don't really know the difference.
> > >
> > > dram_init() maybe ?
> >
> > You propose to initialize the SDRAM controller in dram_init ()?
>
> Well yes, ain't it more fitting ?
>
> Best regards,
> Marek Vasut
>
No. We have to two reasons why this is not the case.
1) Open u-boot/arch/arm/cpu/arm920t/start.S:328
cpu_init_crit
......
line 346
    /*
     * before relocating, we have to setup RAM timing
     * because memory timing is board-dependend, you will
     * find a lowlevel_init.S in your board directory.
     */
2) NAND controller must be initialized before C code run.