linux-kernel - Re: [PATCH] regmap: remove MDIO support

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Message-ID: <4cdbc8804ad23a24a9aa3bb12667031b5bada3a6.camel@svanheule.net>
Date: Wed, 07 May 2025 22:23:49 +0200
From: Sander Vanheule <sander@...nheule.net>
To: Heiner Kallweit <hkallweit1@...il.com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, "Rafael J. Wysocki"	
 <rafael@...nel.org>, Danilo Krummrich <dakr@...nel.org>, Andrew Lunn	
 <andrew@...n.ch>, "netdev@...r.kernel.org" <netdev@...r.kernel.org>, Linux
 Kernel Mailing List <linux-kernel@...r.kernel.org>, Mark Brown
 <broonie@...nel.org>
Subject: Re: [PATCH] regmap: remove MDIO support

Hi Heiner,

On Wed, 2025-05-07 at 08:49 +0200, Heiner Kallweit wrote:
> On 07.05.2025 08:21, Mark Brown wrote:
> > On Wed, May 07, 2025 at 08:09:27AM +0200, Heiner Kallweit wrote:
> > > On 07.05.2025 02:50, Mark Brown wrote:
> > > > On Tue, May 06, 2025 at 10:06:00PM +0200, Heiner Kallweit wrote:
> > 
> > > > > MDIO regmap support was added with 1f89d2fe1607 as only patch from a
> > > > > series. The rest of the series wasn't applied. Therefore MDIO regmap
> > > > > has never had a user.
> > 
> > > > Is it causing trouble, or is this just a cleanup?
> > 
> > > It's merely a cleanup. The only thing that otherwise would need
> > 
> > If it's not getting in the way I'd rather leave it there in case someone
> > wants it, that way I don't need to get CCed into some other series
> > again.
> > 
> Understood. On the other hand is has been sitting idle for 4 yrs now.

How time flies...

The original series that this was part of was never fully merged. This was (in
part) due to some general regmap changes being required [1]. In the meantime
someone else has submitted (nearly the same) changes that were merged into
regmap [2], so I could try resubmitting my patches. These have now been included
downstream in OpenWrt for a few months too, where they are using the regmap MDIO
support, but I understand that out-of-tree consumers aren't usually up for
consideration.

Best,
Sander

[1] https://lore.kernel.org/linux-gpio/cover.1623532208.git.sander@svanheule.net/
[2] https://lore.kernel.org/lkml/20240408101803.43183-2-rf@opensource.cirrus.com/