linux-kernel - Re: Removal of MSC-5000/5080 touchscreen/touchkey drivers?

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Message-ID: <cf02eb9b-2304-4db5-96f9-cfe89037faad@kernel.org>
Date: Fri, 12 Jul 2024 11:52:08 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Dmitry Torokhov <dmitry.torokhov@...il.com>,
 Sangwon Jee <jeesw@...fas.com>, Joonyoung Shim <jy0922.shim@...sung.com>,
 Sylwester Nawrocki <s.nawrocki@...sung.com>
Cc: linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-samsung-soc@...r.kernel.org
Subject: Re: Removal of MSC-5000/5080 touchscreen/touchkey drivers?

On 12/07/2024 07:11, Dmitry Torokhov wrote:
> Hi,
> 
> Sorry for a somewhat wide and random distribution, but I was wondering
> if anyone knows if drivers/input/touchscreen/mcs5000_ts.c and
> drivers/input/keyboard/mcs_touchkey.c are still relevant these days?
> 
> Looking at Melfas web-site it looks like these were the 1st generation
> of their chips, manufactured 2000-2007. The drivers were contributed by
> Samsung long time ago, they rely on custom platform data (no DT support)
> and as far as I can see we never had a user of them in mainline.
> 
> Should I simply remove them? Does anyone know?

Digging in history, commit claims this was for S3C6410 NCP board (with
Samsung S3C6410 SoC), which had a board-file:
arch/arm/mach-s3c64xx/mach-ncp.c
But the touchscreen was never added to the board file, thus mainline
kernel never had it fully working.

The NCP board file was finally removed in v6.3 in commit:
743c8fbb90ca4c02bdf4087fa9f1885ddd85041b

I say drop the driver.

Best regards,
Krzysztof