[U-Boot] [Patch v2] fsl-layerscape: fdt: add IFC fixup if no IFC is avaliable in U-Boot

[Calvin Johnson]

> -----Original Message-----
> From: U-Boot [mailto:u-boot-bounces at lists.denx.de] On Behalf Of Scott Wood
> Sent: Tuesday, May 03, 2016 10:02 AM
> To: Qianyu Gong <qianyu.gong at nxp.com>; u-boot at lists.denx.de; york sun
> <york.sun at nxp.com>
> Cc: Mingkai Hu <mingkai.hu at nxp.com>
> Subject: Re: [U-Boot] [Patch v2] fsl-layerscape: fdt: add IFC fixup if no IFC is
> avaliable in U-Boot
> 
> On Thu, 2016-04-28 at 14:04 +0800, Gong Qianyu wrote:
> > IFC is considered as a required component in Layerscape platforms' Linux.
> 

I don't think IFC is considered as a required component on all SoCs. The LS1012A does not have IFC.

> What does this mean?
> 
> > But if IFC is not enabled in U-Boot on some boards, accessing IFC
> > memory space would cause kernel call trace. So disable IFC node in such
> cases.
> 
> That's the symptom, not the problem.  The problem is that the kernel is
> assuming that U-Boot has done certain initialization, such as the chipselect
> registers, and clearing SRAM (though Linux really should be doing the latter).
>  Why is U-Boot being configured without this?
> 
> -Scott
> 
> _______________________________________________
> U-Boot mailing list
> U-Boot at lists.denx.de
> http://lists.denx.de/mailman/listinfo/u-boot
Calvin