[U-Boot] U-Boot PXA support

[Marek Vasut]

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.

> - 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 ?

-- 
Best regards,
Marek Vasut