[U-Boot] U-Boot PXA support

[Marcel Ziswiler]

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.

> > - 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.

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