linux-kernel - Re: [PATCH v4 02/10] property: Add device_get_child_node_count

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Message-ID: <Z73M3Ua6u1FpgBEK@smile.fi.intel.com>
Date: Tue, 25 Feb 2025 15:59:57 +0200
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Matti Vaittinen <mazziesaccount@...il.com>
Cc: Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
	Matti Vaittinen <matti.vaittinen@...rohmeurope.com>,
	Jonathan Cameron <jic23@...nel.org>,
	Lars-Peter Clausen <lars@...afoo.de>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Daniel Scally <djrscally@...il.com>,
	Sakari Ailus <sakari.ailus@...ux.intel.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	"Rafael J. Wysocki" <rafael@...nel.org>,
	Danilo Krummrich <dakr@...nel.org>,
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
	Chen-Yu Tsai <wens@...e.org>,
	Jernej Skrabec <jernej.skrabec@...il.com>,
	Samuel Holland <samuel@...lland.org>,
	Hugo Villeneuve <hvilleneuve@...onoff.com>,
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	Javier Carrasco <javier.carrasco.cruz@...il.com>,
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	Olivier Moysan <olivier.moysan@...s.st.com>,
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	Trevor Gamblin <tgamblin@...libre.com>,
	Matteo Martelli <matteomartelli3@...il.com>,
	Alisa-Dariana Roman <alisadariana@...il.com>,
	Ramona Alexandra Nechita <ramona.nechita@...log.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	linux-iio@...r.kernel.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org,
	linux-renesas-soc@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev
Subject: Re: [PATCH v4 02/10] property: Add
 device_get_child_node_count_named()

On Tue, Feb 25, 2025 at 03:29:17PM +0200, Matti Vaittinen wrote:
> On 25/02/2025 12:39, Andy Shevchenko wrote:
> > On Tue, Feb 25, 2025 at 12:29:31PM +0200, Matti Vaittinen wrote:
> > > On 25/02/2025 12:21, Andy Shevchenko wrote:
> > > > On Tue, Feb 25, 2025 at 11:40:16AM +0200, Heikki Krogerus wrote:

...

> > > > > 
> > > > > I did not check how many users are you proposing for this, but if
> > > > > there's only one, then IMO this should not be a global function yet.
> > > > > It just feels to special case to me. But let's see what the others
> > > > > think.
> > > > 
> > > > The problem is that if somebody hides it, we might potentially see
> > > > a duplication in the future. So I _slightly_ prefer to publish and
> > > > then drop that after a few cycles if no users appear.
> > > 
> > > After taking a very quick grep I spotted one other existing place where we
> > > might be able to do direct conversion to use this function.
> > > 
> > > drivers/net/ethernet/freescale/gianfar.c
> > > 
> > > That'd be 2 users.
> > 
> > I haven't checked myself, I believe your judgement,
> 
> I took a better look and you obviously shouldn't believe :) The gianfar used
> of_node instead of the fwnode. So, it'd be a single caller at starters.

...which is the same as dev_of_node(), which means that you can use your
function there.

-- 
With Best Regards,
Andy Shevchenko