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From:   Alexander Dahl <ada@thorsis.com>
To:     linux-rt-users@vger.kernel.org
Cc:     Gene Heskett <gheskett@shentel.net>,
        LKML <linux-kernel@vger.kernel.org>
Subject: Re: [ANNOUNCE] 4.19.72-rt25
Date:   Wed, 09 Oct 2019 09:23:49 +0200
Message-ID: <74795460.9uHKpU0Xat@ada>
In-Reply-To: <201910071516.04269.gheskett@shentel.net>
References: <20190916173921.6368cd62@gandalf.local.home> <201910071510.05101.gheskett@shentel.net> <201910071516.04269.gheskett@shentel.net>
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Hello Gene,

Am Montag, 7. Oktober 2019, 15:16:04 CEST schrieb Gene Heskett:
> On Monday 07 October 2019 15:10:05 Gene Heskett wrote:
> > Unfortunately, this does not work for the pi3-4 family. When its all
> > pulled in and patched, there is no arch/arm/configs bcm2709_defconfig
> > or bcm2711_defconfig for either a pi3b or the new pi4b.
> > 
> > I'll go find the 5.2.14 announce and see if its any more complete.
> 
> Its disappeared.

Not quite. Those were never (?) there. ;-)

You'll find those files in the raspberrypi tree [1], but not in mainline. 

It is possible to run a vanilla kernel on RPi 1 to 3, I guess the 
'multi_v7_defconfig' is a good start for 2 and 3. (This works, I have a 
running RPi 3 with unpatched mainline kernel on my desk, without RT however.)

IIRC from linux-arm-kernel list, basic support for RPi 4 is still under review 
and not yet present in mainline?

So you could try a RPi 2 or 3 with mainline + RT or you try to apply the RT 
patches to the vendor/raspberry tree, but I would not count on anyone 
supporting the latter.

HTH & Greets
Alex

[1] https://github.com/raspberrypi/linux