linux-kernel - Re: [PATCH] uio: pruss: Deprecate use of this driver

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Date: Fri, 5 Apr 2024 10:39:49 -0500
From: Robert Nelson <robertcnelson@...il.com>
To: Andrew Davis <afd@...com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Jason Kridner <jkridner@...gleboard.org>, 
	Drew Fustini <drew@...gleboard.org>, Tony Lindgren <tony@...mide.com>, linux-omap@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] uio: pruss: Deprecate use of this driver

On Tue, Mar 26, 2024 at 12:36 PM Andrew Davis <afd@...com> wrote:
>
> On 3/26/24 12:24 PM, Matthijs van Duin wrote:
> > I'll write a more in-depth reply when I have a moment, but right now I'd
> > like to point out that the uio-pruss driver in mainline linux is for the
> > pru subsystem on the freon/primus family of ARM9-based SoCs (OMAP-L1xx /
> > AM17xx / AM18xx / TMS320C674x / DA8xx), which is not currently supported
> > by remoteproc-pru.
> >
>
> I'll wait for your full reply, but a quick note, for those devices listed
> this driver isn't usable either after they all moved to DT. As this driver
> never got a DT port and relies on platform data (which is gone for those
> couple devices).
>
> Andrew

Andrew, I think we are okay with nuking the whole uio driver in
mainline, I'll ack it..

 I figured we'd have more community response..  We gave them a chance..

The only issue I personally have with supporting remoteproc-pruss

We have a few users on 4.19.x-ti, 5.10.x-ti (remoteproc_pruss) can we
please make sure this project:

https://git.ti.com/gitweb?p=pru-software-support-package/pru-software-support-package.git;a=summary

actually works on mainline remoteproc_pruss ?

Watching the shortlog, it must break on every single TI LTS release:

https://git.ti.com/gitweb?p=pru-software-support-package/pru-software-support-package.git;a=shortlog

Whereas uio... well same firmware from 3.8.x ;)

(i will keep our uio fork alive, but we just use an overlay to switch
to between remoteproc_pruss and uio)

Regards,

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