linux-kernel - Re: [PATCH] gpio: remove the gpio-tn48m driver

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Message-ID: <CA+HBbNFKyOFfhRu=XAE891dREPatFRD9VJ5=upz6xPBb8khGjQ@mail.gmail.com>
Date: Mon, 12 Jan 2026 13:24:32 +0100
From: Robert Marko <robert.marko@...tura.hr>
To: Linus Walleij <linusw@...nel.org>
Cc: Randy Dunlap <rdunlap@...radead.org>, Lee Jones <lee@...nel.org>, 
	Robert Marko <robimarko@...il.com>, linux-kernel@...r.kernel.org, 
	Bartosz Golaszewski <brgl@...nel.org>, linux-gpio@...r.kernel.org, 
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, devicetree@...r.kernel.org
Subject: Re: [PATCH] gpio: remove the gpio-tn48m driver

On Mon, Jan 12, 2026 at 11:30 AM Linus Walleij <linusw@...nel.org> wrote:
>
> On Mon, Jan 12, 2026 at 7:49 AM Randy Dunlap <rdunlap@...radead.org> wrote:
>
> > The gpio-tn48m driver is useless without the simple-mfd parent, which is
> > not present in the kernel tree, so delete it and all references to it.
> > Also delete references to the (missing) mfd driver.
> >
> > Fixes: b3dcb5de6209 ("gpio: Add Delta TN48M CPLD GPIO driver")
> > Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
>
> Is an equally fine solution to get a rebased version of this patch:
> https://lore.kernel.org/all/20220131133049.77780-2-robert.marko@sartura.hr/
>
> to Lee, given that Robert indicates the driver has users?
>
> AFAICT it was just reverted out because of process, not
> because of any problem wit the driver/subdrivers themselves.

It would be awesome to see it in the tree again, as the drivers
themselves work just fine
and allow SFP-s to work on the TN48M and I have patches for TN4810M
(Which is a SFP only version).

I still have both switches and there are some in the wild being
actually used as L3 switches so
it would be great to have the required CPLD drivers be compileable.

Regards,
Robert
>
> Lee might have something to add though.
>
> Yours,
> Linus Walleij



-- 
Robert Marko
Staff Embedded Linux Engineer
Sartura d.d.
Lendavska ulica 16a
10000 Zagreb, Croatia
Email: robert.marko@...tura.hr
Web: www.sartura.hr