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

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Message-ID: <f4221c9a-751a-4ab2-8544-7d90b2f320fb@lunn.ch>
Date: Wed, 7 May 2025 14:30:42 +0200
From: Andrew Lunn <andrew@...n.ch>
To: Heiner Kallweit <hkallweit1@...il.com>
Cc: Mark Brown <broonie@...nel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	"Rafael J. Wysocki" <rafael@...nel.org>,
	Danilo Krummrich <dakr@...nel.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	Sander Vanheule <sander@...nheule.net>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] regmap: remove MDIO support

On Wed, May 07, 2025 at 08:49:15AM +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.

It is something that a PCS driver could use. They are sometimes memory
mapped rather than being on an MDIO bus. Using a regmap could hide
that difference.

     Andrew