linux-kernel - Re: [PATCH v3 03/24] dt-bindings: ufs: mediatek,ufs: Add mt8196 variant

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Message-ID: <20251026-these-wise-9b5e63c78907@spud>
Date: Sun, 26 Oct 2025 22:25:44 +0000
From: Conor Dooley <conor@...nel.org>
To: Nicolas Frattaroli <nicolas.frattaroli@...labora.com>
Cc: Alim Akhtar <alim.akhtar@...sung.com>,
	Avri Altman <avri.altman@....com>,
	Bart Van Assche <bvanassche@....org>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	Chunfeng Yun <chunfeng.yun@...iatek.com>,
	Vinod Koul <vkoul@...nel.org>,
	Kishon Vijay Abraham I <kishon@...nel.org>,
	Peter Wang <peter.wang@...iatek.com>,
	Stanley Jhu <chu.stanley@...il.com>,
	"James E.J. Bottomley" <James.Bottomley@...senpartnership.com>,
	"Martin K. Petersen" <martin.petersen@...cle.com>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>,
	Louis-Alexis Eyraud <louisalexis.eyraud@...labora.com>,
	kernel@...labora.com, linux-scsi@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org, linux-phy@...ts.infradead.org
Subject: Re: [PATCH v3 03/24] dt-bindings: ufs: mediatek,ufs: Add mt8196
 variant

On Fri, Oct 24, 2025 at 07:51:11PM +0200, Nicolas Frattaroli wrote:
> On Friday, 24 October 2025 19:13:36 Central European Summer Time Conor Dooley wrote:
> > On Thu, Oct 23, 2025 at 09:49:21PM +0200, Nicolas Frattaroli wrote:
> > 
> > >      };
> > > +  - |
> > > +    #include <dt-bindings/reset/mediatek,mt8196-resets.h>
> > > +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> > > +
> > > +    ufshci@...10000 {
> > > +        compatible = "mediatek,mt8196-ufshci";
> > > +        reg = <0x16810000 0x2a00>;
> > > +        interrupts = <GIC_SPI 320 IRQ_TYPE_LEVEL_HIGH>;
> > > +
> > > +        clocks = <&ufs_ao_clk 6>,
> > > +                 <&ufs_ao_clk 7>,
> > > +                 <&clk26m>,
> > > +                 <&ufs_ao_clk 3>,
> > > +                 <&clk26m>,
> > > +                 <&ufs_ao_clk 4>,
> > > +                 <&ufs_ao_clk 0>,
> > > +                 <&topckgen 7>,
> > > +                 <&topckgen 41>,
> > > +                 <&topckgen 105>,
> > > +                 <&topckgen 83>,
> > > +                 <&ufs_ao_clk 1>,
> > > +                 <&ufs_ao_clk 2>,
> > > +                 <&topckgen 42>,
> > > +                 <&topckgen 84>,
> > > +                 <&topckgen 102>;
> > 
> > This is absolutely a nitpick thing, but if you end up resubmitting, can
> > you pick a consistent format between the two examples your series adds
> > for the clocks/clock names?
> 
> No problem, will do. IIRC I kept them as a list like this so I could
> easily reorder things, but now that I'm fairly sure this order is the
> correct one, it's probably best to make this more compact.
> 
> Also sorry for the numbers as clock IDs, but MediaTek clock headers
> have conflicting symbols and the dt schema example extractor dumps
> all examples into one dts file. :(

Numbers is fine, dw about that.

> Since this has bugged me in the past, and many schemas may rely on
> the concat behaviour now: would a patch in the distant future that
> prefixes all MediaTek clock binding headers with the SoC name be
> acceptable if it keeps the old names intact as aliases to them with
> a #ifndef guard?

Honestly, I don't think it's that big of a deal to use the numbers,
they're only examples after all (even if for soc-peripherals they're
almost always exactly what is used in reality).

What you do with aliases is really up to the mediatek platform
maintainers, but I think if it were my platform I would just not bother.

> I should also think about some way we can avoid similar bindings
> symbol naming mishaps in the future.
> 
> Thank you for pointing me in the right direction with regards to
> the binding!
> 
> Kind regards,
> Nicolas Frattaroli
> 
> > Reviewed-by: Conor Dooley <conor.dooley@...rochip.com>
> > pw-bot: not-applicable

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