[U-Boot] powerpc 4xx support

[Stefan Roese]

Hi Ivan,

On 15.11.2017 04:42, Tom Rini wrote:
> On Tue, Nov 14, 2017 at 06:21:17PM +0000, Ivan Mikhaylov1 wrote:
> 
>> hi everyone, I saw that powerpc 4xx cpus were removed from powerpc
>> cpu tree with this commit
>> 98f705c9cefdfdba62c069821bbba10273a0a8ed
>> powerpc: remove 4xx support
>>
>> I can help to maintain this tree with further support and needs.

I would very much welcome to see ppc4xx actively maintained in
U-Boot again. :)

>> As I understood reason of this
>> removal was change to Kconfig. Anything else should be done? In
>> this case what process should be?
>> 1. get cpu 4xx before removal
>> 2. do the migration to kconfig
>> 3. send patches via uboot mail list
>> something like this?
> 
> So, we need active testing and maintenance.  To bring 4xx support back,
> introduce patches that bring in core support and migrate the code to
> using Kconfig only.  There must be no new entries to
> scripts/config_whitelist.txt

Additionally to this, some (all?) device drivers would need to be
converted to DM (driver model).

Thanks,
Stefan