[U-Boot] U-Boot PXA support

[Marek Vasut]

On 5/30/19 1:47 PM, Marcel Ziswiler wrote:
> On Thu, 2019-05-30 at 11:29 +0200, Marek Vasut wrote:
>> On 5/30/19 11:14 AM, Marcel Ziswiler wrote:
>>> Hi Tom
>>>
>>> On Wed, 2019-05-29 at 10:12 -0400, Tom Rini wrote:
>>>> On Thu, May 16, 2019 at 02:53:55PM +0000, Marcel Ziswiler wrote:
>>>>> Hi Tom
>>>>>
>>>>> On Mon, 2019-05-06 at 09:26 -0400, Tom Rini wrote:
>>>>>> Hey folks,
>>>>>>
>>>>>> I'm attempting, again, to see what we need to do in order to
>>>>>> use
>>>>>> gcc-
>>>>>> 8.x
>>>>>> for U-Boot and ran into, again:
>>>>>> https://patchwork.ozlabs.org/patch/920329/ which in short is
>>>>>> that
>>>>>> when
>>>>>> using -mcpu=xscale gcc-8.x throws an odd error:
>>>>>> cc1: error: switch -mcpu=xscale conflicts with -march=armv5te
>>>>>> switch
>>>>>> [-Werror]
>>>>>>
>>>>>> Now note, U-Boot isn't passing -march= at all, just
>>>>>> -mcpu=xscale
>>>>>> which
>>>>>> suggests perhaps something broke in upstream gcc.  Looking at
>>>>>> the
>>>>>> kernel, it's not used -mcpu=xscale ever, just -mtune=xscale
>>>>>> but
>>>>>> that
>>>>>> leads to different failures (seen here with gcc-7.3):
>>>>>>   CC      drivers/usb/gadget/pxa25x_udc.o
>>>>>> {standard input}: Assembler messages:
>>>>>> {standard input}:779: Error: selected processor does not
>>>>>> support
>>>>>> `pld
>>>>>> [lr]' in ARM mode
>>>>>> {standard input}:1201: Error: selected processor does not
>>>>>> support
>>>>>> `pld [r7]' in ARM mode
>>>>>> {standard input}:2519: Error: selected processor does not
>>>>>> support
>>>>>> `pld [r3]' in ARM mode
>>>>>> {standard input}:2796: Error: selected processor does not
>>>>>> support
>>>>>> `pld [r3]' in ARM mode
>>>>>>
>>>>>> So, what should we do about this?  Is there still active
>>>>>> interest
>>>>>> in
>>>>>> supporting the PXA platforms?  Thanks folks!
>>>>>
>>>>> We are actually still shipping Colibri PXA270 modules for
>>>>> another
>>>>> one
>>>>> or two years I believe after which Marvell stops selling us
>>>>> chips.
>>>>>
>>>>> The strange thing is that I build U-Boot master more or less
>>>>> daily
>>>>> without any known issues currently using the regular gcc 8.2
>>>>> 2019.01
>>>>> tool chain from ARM.
>>>>>
>>>>> The only issue is the missing DM_MMC and/or DM_USB conversion
>>>>> which
>>>>> I
>>>>> started working on a long time ago but never came around
>>>>> properly
>>>>> debugging. I may pick that one up tomorrow again.
>>>>
>>>> I want to circle back to this.  Thanks again for confirming that
>>>> other
>>>> toolchains are happy here (and figuring out a path forward for
>>>> everyone
>>>> is on my TODO list still).  And I agree we need to figure out
>>>> something
>>>> about the size growth.  But this still leaves one question
>>>> open.  There
>>>> are, after dropping zipitz2, 2 PXA platforms.
>>>
>>> Let me name those two:
>>>
>>> - Colibri PXA270
>>>
>>> Our customers already had to commit to a last-time-buy and we will
>>> phasing out shipments next year. I don't think anybody is doing any
>>> new
>>> designs with them since quite a while.
>>
>> I still have one , I am really fond of the devkit design.
> 
> Thanks, you could keep using it with e.g. the latest Colibri iMX8QXP
> (;-p). Should I send you one? I believe we also sent Stefano a full kit
> with a Colibri iMX6DL.

Which ES ? ;-)

>>> - HP iPAQ Pocket PC h2200
>>>
>>> A consumer device with PXA255 from back in 2002. There has not been
>>> any
>>> activity on h2200 from its maintainer Lukasz Dalek for almost 5
>>> years
>>> now. Without anybody actually owning such hardware stepping up it
>>> will
>>> be quite impossible to maintain.
>>
>> Let's remove this one.
>>
>>>> Do you want to take over
>>>> the MAINTAINER role from Marek for them?
>>>
>>> While I would love to do so I really don't think that makes too
>>> much
>>> sense at all. We probably should just drop PXA support entirely,
>>> move
>>> on and concentrate our resources on newer stuff like e.g. my patch
>>> sets
>>> for Apalis iMX8 and Colibri iMX8X which did not get any more
>>> attention
>>> since more resp. almost a month now.
>>
>> When did you say the Colibri PXA270 goes away ?
> 
> Well, the original PXA270 went end-of-life more than 5 years ago. We
> re-designed for the die-shrinked PXA270M which will now end-of-life
> next year. Anyway, it is no longer orderable but customers having put
> in their last-time-buy quantities will still get them shipped next
> year.

With latest greatest U-Boot ? :)

> https://developer.toradex.com/products/colibri-pxa270#revision-history
> 


-- 
Best regards,
Marek Vasut