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SubjectRe: [PATCH] uio: pruss: Deprecate use of this driver
From
On 4/5/24 10:39 AM, Robert Nelson wrote:
> On Tue, Mar 26, 2024 at 12:36 PM Andrew Davis <afd@ti.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..
>

Okay, will send that patch.

> 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:
>

Yeah, before we got the remoteproc driver upstream we managed
to break it just about every LTS, it *should* be a bit more
stable now that it is upstream..

> 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 ;)
>

That is one benefit of the microkernel style "just expose raw memory
to userspace as a driver", it sure looks simple :)

Andrew

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

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