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From: Frieder Schrempf <frieder.schrempf@kontron.de>
To: Mark Brown <broonie@kernel.org>
Cc: linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org
Subject: Re: [PATCH] spi: spidev: Add compatible for external SPI ports on Kontron boards
Date: Thu, 2 Jul 2020 18:24:49 +0200	[thread overview]
Message-ID: <479d566a-213f-4e33-8ac7-7637ae88e31c@kontron.de> (raw)
In-Reply-To: <20200702150725.GI4483@sirena.org.uk>

On 02.07.20 17:07, Mark Brown wrote:
> On Thu, Jul 02, 2020 at 04:46:09PM +0200, Frieder Schrempf wrote:
> 
>> My intention is to use the spidev driver in the default board DT for an
>> interface that is routed to an extension connector and has no dedicated
>> slave device attached onboard. So users can attach sensors, etc. with
>> userspace drivers without touching the kernel or DT.
> 
> The expected way of doing this is to describe whatever was attached via
> DT when it's attached - the device is what has the compatible, not some
> connector in the middle of the connection.  The way you've got things
> set up if the device has a driver then they won't be able to instantiate
> the driver.

Ok thanks, got it. I will remove the spi device from the board DT and 
use an overlay if required. Now I got a reason to learn writing DT 
overlays ;)

  reply	other threads:[~2020-07-02 16:24 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-02 14:18 [PATCH] spi: spidev: Add compatible for external SPI ports on Kontron boards Schrempf Frieder
2020-07-02 14:25 ` Mark Brown
2020-07-02 14:46   ` Frieder Schrempf
2020-07-02 14:57     ` Geert Uytterhoeven
2020-07-02 16:04       ` Frieder Schrempf
2020-07-02 15:07     ` Mark Brown
2020-07-02 16:24       ` Frieder Schrempf [this message]
2020-07-13 13:19         ` Frieder Schrempf
2020-07-13 15:11           ` Mark Brown
2020-07-14  8:54             ` Frieder Schrempf
2020-07-14 19:29               ` Mark Brown
2020-07-15  7:26                 ` Frieder Schrempf
2020-07-15 11:36                   ` Mark Brown
2020-07-15 11:45                     ` Frieder Schrempf
2020-07-15 13:10                       ` Mark Brown
2020-07-15 13:48                         ` Frieder Schrempf
2020-07-15 13:51                           ` Mark Brown
2020-07-15 19:06             ` Geert Uytterhoeven
2020-07-16  7:53               ` Frieder Schrempf

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