[External] Re: [PATCH] arm64: zynqmp: Support converting pm_cfg_obj.c

[Michal Simek]

On 23. 06. 20 23:46, Brandon Maier wrote:
> On Tue, Jun 23, 2020 at 4:33 PM Luca Ceresoli <luca at lucaceresoli.net> wrote:
>>
>> Hi,
>>
>> On 23/06/20 23:23, Luca Ceresoli wrote:
>>> Hi Brandon,
>>>
>>> On 23/06/20 19:08, Brandon Maier wrote:
>>>> On Tue, Jun 23, 2020 at 10:18 AM Luca Ceresoli <luca at lucaceresoli.net> wrote:
>>>>>
>>>> I'm trying to get it to work with Buildroot. Buildroot does have a
>>>> package for uboot-tools, so I could use that to run it. I'd have to
>>>> move the config and build commands into Buildroot's uboot package.
>>>> Since the script belongs to U-Boot anyway, it seemed cleaner to
>>>> integrate it directly into U-Boot so it could be used by other build
>>>> systems too.
>>>
>>> I understand. But I also understand Michal's concern: the U-Boot
>>> makefiles are quite complex already, and this feature is a relatively
>>> minor improvement.
>>>
>>> Probably having the conversion in Buildroot could be even simpler as you
>>> can support _only_ the C format there and do the conversion
>>> unconditionally. Only one workflow, no ifs, simpler code. Don't forget
>>> to Cc: me if you send a patch for that, I'll be glad to review it.
> 
> Either U-Boot or Buildroot is fine by me. If Yocto alreads does it in
> their U-Boot package then I can see that being a precedent for
> patching Buildroot. I'll drop this patch to U-Boot then.


I have never started to use Luca's python script because I use different
methods how to get this fragment.
The first one was taking fsbl and simply extract pmu cfg fragment from
it with using binutils. I have sent that script some time ago.

And the second method is simply take what Xilinx C file and link it with
embeddedSW repository (just for headers) and build it by gcc.

A month ago I was experiment with this fragment and was trying to find
out if we can have generic one which works on all platforms.
As is visible this is fine for boot but not so good for live system.

The fragment itself by spec has feature for exchanging it at run time.
I sent a patch to utilize it based on current code.
https://lists.denx.de/pipermail/u-boot/2020-June/416310.html

It means I would more prefer to go in a way that pmufw will be able to
accept board/platform/configuration specific fragments and have just one
in u-boot which in general enable everything by default.
But I don't have time to go to pmufw and fix it.

Thanks,
Michal