[U-Boot] [PATCH] arm: socfpga: dm: Fix DM initialization failure after warm reset

[Marek Vasut]

On Saturday, August 29, 2015 at 06:54:54 PM, Simon Glass wrote:
> Hi Marek,

Hi Simon,

[...]

> >> >> Does that mean it skips crt0.S? How come global_data is not zeroed
> >> >> there?
> >> > 
> >> > No, it does not mean it skips crt0.S . After the warm reset, the
> >> > bootrom jumps onto the reset vector, so crt0.S (_main) must be
> >> > executed.
> >> 
> >> Then I don't understand the need for this patch.
> > 
> > Apparently, the gd->dm_root is set to a non-NULL address for some
> > (unknown) reason. I don't quite understand this myself.
> > 
> > The only possibility which can lead to gd->dm_root being set to non-NULL
> > address is that crt0.S _main is not executed, is that correct ?
> 
> I think so, unless driver model was already inited by a call to
> spl_init(). But I don't see where your board might do that.

That's correct.

Best regards,
Marek Vasut