linux-kernel - Re: [PATCH] ARM: dts: omap4-panda-a4: Add missing model and compatible properties

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Message-ID: <CAOCHtYi_AKq3Y5BxzTs9GL8UuU6SkS6hpankGK60SVXzCGkDMw@mail.gmail.com>
Date: Wed, 22 Jan 2025 16:25:04 -0600
From: Robert Nelson <robertcnelson@...il.com>
To: Tom Rini <trini@...sulko.com>
Cc: Andreas Kemnade <andreas@...nade.info>, Kevin Hilman <khilman@...nel.org>, 
	linux-kernel@...r.kernel.org, Nishanth Menon <nm@...com>, Tony Lindgren <tony@...mide.com>, 
	Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	linux-omap@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH] ARM: dts: omap4-panda-a4: Add missing model and
 compatible properties

On Wed, Jan 22, 2025 at 4:18 PM Tom Rini <trini@...sulko.com> wrote:
>
> On Wed, Jan 22, 2025 at 03:52:47PM -0600, Robert Nelson wrote:
> > On Wed, Jan 22, 2025 at 3:10 PM Tom Rini <trini@...sulko.com> wrote:
> > >
> > > On Wed, Jan 22, 2025 at 02:56:19PM -0600, Robert Nelson wrote:
> > > > On Wed, Jan 22, 2025 at 2:46 PM Andreas Kemnade <andreas@...nade.info> wrote:
> > > > >
> > > > > Hi,
> > > > >
> > > > > Am Tue, 21 Jan 2025 18:08:24 -0600
> > > > > schrieb Tom Rini <trini@...sulko.com>:
> > > > >
> > > > > > > If keeping it is just this binding update, then I'd say we keep it, but
> > > > > > > if it gets any more paninful to maintain, I'm also not going to argue
> > > > > > > very hard to keep it.
> > > > > >
> > > > > > I'm not in the position to see if any of the Pandaboards work at this
> > > > > > point, so I don't know if they're otherwise functional or a huge pile of
> > > > > > problems.
> > > > >
> > > > > I am still testing stuff with pandaboards. But I do not have the a4
> > > > > one. So yes they are functional. Compared with other devices still in
> > > > > use using the same SoC, here you can play around with everything, know
> > > > > the device. so it is a reference for keeping the really interesting
> > > > > devices working.
> > > > >
> > > > > Regarding the a4: I think it is better to keep that one in, just that
> > > > > nobody gets confused if he/she digs out his panda board for some
> > > > > comparison test and uses a wrong board revision.
> > > >
> > > > Do you want an a4? I could dig one or two out! ;)
> > >
> > > Unless I'm missing something, the a4 hasn't been bootable by upstream in
> > > about 10 years now... There's no top-level compatible, so there's no
> > > match in the generic board code. I can't recall if the A4 versions were
> > > available to anyone other than maintainers and beagleboard.org folks
> > > themselves as part of bring-up/testing. I know I had one and ewasted it
> > > a while ago.
> >
> > PandaBoard EA1->A3  = omap4-panda.dtb
> > PandaBoard A4->+ (non ES) = omap4-panda-a4.dtb
> >
> > A4 was the final production version of the non ES Panda..
>
> Oh! My memory sucks here, sorry for the confusion. But it's also still
> the case that omap4-panda-a4.dtb hasn't had a top-level compatible
> string, so can it even be functionally used?

Looking back, I moved from PandaBoard -> WandBoard for
BeagleBoard.org's build infacature..  Dual A9/USB vs Quad A9/SATA...
yeah.. sata was more stable then USB..  I think it was around v5.4 lts
I gave up on Panda's...  SO 5.4.x would have been the last time I
personally used the panda's on mainline..

Digging more, yay for omappedia! ;)
https://omappedia.com/wiki/PandaBoard_Revisions

I never personally saw the A5 or A6 rev's in my hand..

What's scary, teh A4's changed the hdmi pins:
https://git.ti.com/gitweb?p=ti-linux-kernel/ti-linux-kernel.git;a=blob;f=arch/arm/boot/dts/omap4-panda-a4.dts;h=f1a6476af3716489007c12141d06f208ec2ebc94;hb=refs/heads/ti-linux-4.14.y

Yet no gpio id change..


Regards,

--
Robert Nelson
https://rcn-ee.com/