From: Greg KH <gregkh@linuxfoundation.org>
To: Radisson97@web.de
Cc: linux-serial@vger.kernel.org
Subject: Re: possible regression with rs485 usage
Date: Thu, 5 Sep 2024 10:25:58 +0200 [thread overview]
Message-ID: <2024090555-dispatch-recent-b3ad@gregkh> (raw)
In-Reply-To: <trinity-385b45db-ce89-419e-a226-4e10351f0c0d-1725524112044@msvc-mesg-web108>
On Thu, Sep 05, 2024 at 10:15:12AM +0200, Radisson97@web.de wrote:
> Hi, i am new to this list because i have a strange problem.
>
> We have an embedded board based on the omap3-design with a rs485.
> With kernel 3.5 it works fine. Since 3.5 is ancient we are noe trying
> to get a new kernel up an running what is 5.8.
Any specific reason why 5.8? That too is ancient and obsolete and not
supported by anyone.
> I turns out that the rs485 has issues (it seems a lot of ppl have
> the same issue also with other boards). We enable the rs485 via ioctl()
> and nothing seems to work. Several restarts, playing with Marcin Niestroyj's
> rs485config it suddenly works. (yes hardware is ok, works with older kernel).
So it does work?
What exact hardware and drivers are you using?
And can you try a modern and supported kernel version please? We can't
do anything with 5.8 :(
thanks,
greg k-h
next prev parent reply other threads:[~2024-09-05 8:26 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-09-05 8:15 possible regression with rs485 usage Radisson97
2024-09-05 8:25 ` Greg KH [this message]
2024-09-08 20:18 ` Peter Radisson
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