linux-kernel - Re: [PATCH mt76 v2 1/3] dt-bindings: net: wireless: mt76: Document power-limits country property

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Message-ID: <1697b64e2b64682dbf83186f17f42c50ecf88fa8.camel@sipsolutions.net>
Date: Mon, 06 Oct 2025 22:48:15 +0200
From: Johannes Berg <johannes@...solutions.net>
To: Rob Herring <robh@...nel.org>, "Sven Eckelmann (Plasma Cloud)"
	 <se@...onwunderlich.de>
Cc: Felix Fietkau <nbd@....name>, Lorenzo Bianconi <lorenzo@...nel.org>, 
 Ryder Lee <ryder.lee@...iatek.com>, Shayne Chen <shayne.chen@...iatek.com>,
 Sean Wang	 <sean.wang@...iatek.com>, Matthias Brugger
 <matthias.bgg@...il.com>,  AngeloGioacchino Del Regno
 <angelogioacchino.delregno@...labora.com>, Maxime Coquelin
 <mcoquelin.stm32@...il.com>, Alexandre Torgue	
 <alexandre.torgue@...s.st.com>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, linux-wireless@...r.kernel.org,
 linux-kernel@...r.kernel.org, 	linux-arm-kernel@...ts.infradead.org,
 linux-mediatek@...ts.infradead.org, 
	linux-stm32@...md-mailman.stormreply.com, devicetree@...r.kernel.org
Subject: Re: [PATCH mt76 v2 1/3] dt-bindings: net: wireless: mt76: Document
 power-limits country property

On Mon, 2025-10-06 at 15:45 -0500, Rob Herring wrote:
> 
> > +          country:
> > +            $ref: /schemas/types.yaml#/definitions/string
> > +            description:
> > +              ISO 3166-1 alpha-2 country code for power limits
> 
> This would be constrained to something like this?:
> 
> pattern: '^[A-Z]{2}$'

There's a "00" special case for "world roaming", so maybe that would
have to be '^([A-Z]{2}|00)$'? Not sure you'd ever want to specify that
though. We also use '99' internally for even more special cases, but I'm
pretty sure that shouldn't be specified externally.

johannes