linux-kernel - Re: [PATCH 3/4] regulator: Support the LTM8054 voltage regulator

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Message-ID: <2799517.mvXUDI8C0e@fw-rgant>
Date: Fri, 19 Sep 2025 10:19:26 +0200
From: Romain Gantois <romain.gantois@...tlin.com>
To: Andy Shevchenko <andriy.shevchenko@...el.com>
Cc: Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>,
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>, Jonathan Cameron <jic23@...nel.org>,
 David Lechner <dlechner@...libre.com>,
 Nuno Sá <nuno.sa@...log.com>,
 Andy Shevchenko <andy@...nel.org>,
 Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
 linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
 linux-iio@...r.kernel.org
Subject: Re: [PATCH 3/4] regulator: Support the LTM8054 voltage regulator

On Thursday, 18 September 2025 21:17:59 CEST Andy Shevchenko wrote:
> On Thu, Sep 18, 2025 at 11:31:50AM +0200, Romain Gantois wrote:
> > On Tuesday, 16 September 2025 16:17:56 CEST Romain Gantois wrote:
> > > On Tuesday, 16 September 2025 15:12:37 CEST Andy Shevchenko wrote:
> > > > On Tue, Sep 16, 2025 at 12:24:08PM +0200, Romain Gantois wrote:
...
> > > > I think we have already something agnostic in regulator API to get a
> > > > regulator from a firmware node (rather than from specific OF/etc one).
> > > 
> > > IIRC the "of_match" regulator descriptor property can be used for this,
> > > I'll have a second look and see if I can use that instead.
> > 
> > Looks like I misread your comment sorry, the "of_match" property is pretty
> > much irrelevant to using fwnode_* wrappers, and I didn't find any of those
> > in the regulator subsystem. I'm missing a Kconfig dependency on "OF"
> > though, I'll have to add that.
> 
> Why do we need to add that dependency? Yes, probably it won't function,
> but then it will decrease test coverage at compile time.

Oh I didn't see it that way, in that case I'll just go the LTC3676 way and 
leave the OF dependency out.

Thanks,

-- 
Romain Gantois, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

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