linux-kernel - Re: [PATCH v3 4/5] dt-bindings: usb/ti,am62-usb.yaml: Add PHY2 register space

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Date: Fri, 2 Feb 2024 09:53:11 +0000
From: Conor Dooley <conor.dooley@...rochip.com>
To: Roger Quadros <rogerq@...nel.org>
CC: Conor Dooley <conor@...nel.org>, Bin Liu <b-liu@...com>, <nm@...com>,
	<vigneshr@...com>, <afd@...com>, <kristo@...nel.org>, <robh+dt@...nel.org>,
	<krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>, <srk@...com>,
	<r-gunasekaran@...com>, <linux-arm-kernel@...ts.infradead.org>,
	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 4/5] dt-bindings: usb/ti,am62-usb.yaml: Add PHY2
 register space

On Fri, Feb 02, 2024 at 11:36:55AM +0200, Roger Quadros wrote:
> 
> 
> On 01/02/2024 21:13, Conor Dooley wrote:
> > On Thu, Feb 01, 2024 at 12:35:22PM -0600, Bin Liu wrote:
> >> On Thu, Feb 01, 2024 at 06:18:05PM +0000, Conor Dooley wrote:
> >>> On Thu, Feb 01, 2024 at 06:15:20PM +0000, Conor Dooley wrote:
> >>>> On Thu, Feb 01, 2024 at 02:03:31PM +0200, Roger Quadros wrote:
> >>>>> So far this was not required but due to the newly identified
> >>>>> Errata i2409 [1] we need to poke this register space.
> >>>>>
> >>>>> [1] https://www.ti.com/lit/er/sprz487d/sprz487d.pdf
> >>>>>
> >>>>> Signed-off-by: Roger Quadros <rogerq@...nel.org>
> >>>>
> >>>> Acked-by: Conor Dooley <conor.dooley@...rochip.com>
> >>>
> >>> Actually, where is the user for this that actually pokes the register
> >>> space?
> 
> https://lore.kernel.org/all/20240201121220.5523-5-rogerq@kernel.org/
> 
> >>> You're adding another register region, so I went to check how you were
> >>> handling that in drivers, but there's no driver patch.
> >>
> >> See Roger's another patch set 'Add workaround for Errata i2409' posted
> >> on 16th.
> > 
> > This patch should be with that series, not with these dts patches.
> > 
> 
> Why not? There should be no dependency between DTS and driver implementation.
> 
> As DTS and driver will be merged by separate maintainers I thought it
> would be easier for maintainers this way.

dts and driver might be merged by different people, but dt-bindings and
drivers are merged by the same people. This is a bindings patch, not a
dts patch. Look at what get_maintainer says for this file:
	Greg Kroah-Hartman <gregkh@...uxfoundation.org> (supporter:USB SUBSYSTEM)
	Rob Herring <robh+dt@...nel.org> (maintainer:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS)
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org> (maintainer:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS)
	Conor Dooley <conor+dt@...nel.org> (maintainer:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS)
	Aswath Govindraju <a-govindraju@...com> (in file)
	linux-usb@...r.kernel.org (open list:USB SUBSYSTEM)
	devicetree@...r.kernel.org (open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS)
	linux-kernel@...r.kernel.org (open list)
Greg and linux-usb are on there, but you have not CCed them.

Being with the driver also allows bindings maintainers to check that you
don't break backwards compatibility. It also prevents me having to ask
for the driver patch, then be given just a subject line that I have to
go and look up myself!

Thanks,
Conor.


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