linux-kernel - Re: [PATCH] spi: spidev: Add compatible for external SPI ports on Kontron boards

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Date:   Thu, 2 Jul 2020 16:46:09 +0200
From:   Frieder Schrempf <frieder.schrempf@...tron.de>
To:     Mark Brown <broonie@...nel.org>
Cc:     linux-kernel@...r.kernel.org, linux-spi@...r.kernel.org
Subject: Re: [PATCH] spi: spidev: Add compatible for external SPI ports on
 Kontron boards

On 02.07.20 16:25, Mark Brown wrote:
> On Thu, Jul 02, 2020 at 04:18:46PM +0200, Schrempf Frieder wrote:
>> From: Frieder Schrempf <frieder.schrempf@...tron.de>
>>
>> Allow external SPI ports on Kontron boards to use the spidev driver.
> 
> I'd have expected this to require loading a DT overlay for whatever's
> attached?

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.

See https://patchwork.kernel.org/patch/11639075/ for the boards DT.