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

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Message-ID: <1839711.VLH7GnMWUR@ripper>
Date: Tue, 07 Oct 2025 09:56:58 +0200
From: Sven Eckelmann <se@...onwunderlich.de>
To: Rob Herring <robh@...nel.org>, Johannes Berg <johannes@...solutions.net>
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 Monday, 6 October 2025 22:48:15 CEST Johannes Berg wrote:
> 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.

Good point. I would say that 00 is already handled by the "fallback" limit 
code. If it finds neither a country nor a regdomain, it just marks this entry 
as "fallback".

Regards,
	Sven
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