linux-kernel - Re: [PATCH v1 03/25] arm64: dts: colibri-imx8x: Sort properties

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Date:   Tue, 14 Mar 2023 16:17:35 +0800
From:   Shawn Guo <shawnguo@...nel.org>
To:     Francesco Dolcini <francesco@...cini.it>
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Philippe Schenker <dev@...henker.ch>,
        devicetree@...r.kernel.org, Sascha Hauer <s.hauer@...gutronix.de>,
        NXP Linux Team <linux-imx@....com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Frank Rowand <frowand.list@...il.com>,
        linux-arm-kernel@...ts.infradead.org,
        Fabio Estevam <festevam@...il.com>,
        Philippe Schenker <philippe.schenker@...adex.com>,
        linux-kernel@...r.kernel.org,
        Marcel Ziswiler <marcel.ziswiler@...adex.com>
Subject: Re: [PATCH v1 03/25] arm64: dts: colibri-imx8x: Sort properties

On Thu, Mar 09, 2023 at 01:19:13PM +0100, Francesco Dolcini wrote:
> Hello Krzysztof, first thanks for your review.
> 
> Let's try to get some clarity on this with the help of Shawn.
> 
> On Wed, Mar 08, 2023 at 01:57:38PM +0100, Krzysztof Kozlowski wrote:
> > On 08/03/2023 13:52, Philippe Schenker wrote:
> > > From: Philippe Schenker <philippe.schenker@...adex.com>
> > > 
> > > Sort properties according to the following order and inside these
> > > alphabetically.
> > > 
> > > 1. compatible
> > > 2. reg
> > > 3. standard properties
> > > 4. specific properties
> > > 5. status
> > 
> > Is this approved coding style for IMX DTS?
> 
> I 100% understand your concerns here.
> 
> With that said let me try to briefly explain the reasoning here, in
> various threads we were asked in the past to move node around based on
> some not 100% defined rules [0][1].
> 
> On Sun, 2023-01-29 at 11:19 +0800, Shawn Guo wrote:
> >> +&usbotg1 {
> >> +	adp-disable;
> >> +	ci-disable-lpm;
> >> +	hnp-disable;
> >> +	over-current-active-low;
> >> +	pinctrl-names = "default";
> >> +	pinctrl-0 = <&pinctrl_usbotg1>;
> >
> >We generally want to put such generic properties before device specific
> >ones.
> 
> In addition to that we find convenient to have properties sorted
> alphabetically when no other rule is available, it just prevents any
> kind of discussion, minimize merge conflicts and make comparing files
> easier.
> 
> I also agree that the difference between "generic"/"specific" is fuzzy
> at best.
> 
> With all that said ...
> 
> Shawn: What should we do? We can of course avoid any kind of re-ordering
> from now on.

We are practically asking for 1, 2 and 5 for i.MX DTS files, but pretty
flexible for the rest.

> I am fine to be very pragmatic here, no-reordering on existing DTS
> files, newly added DTS files we discuss whatever is the reasoning of the
> reviewer/maintainer on a case-by-case basis.

Sounds good to me!  While I personally like your ordering, I do not want
it to churn the existing DTS files.

I'm happy to take this patch as a special case though :)

Shawn