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From: Chen-Yu Tsai <wens@kernel.org>
Date: Thu, 4 Jan 2024 13:58:35 +0800
Message-ID: <CAGb2v66xVLqr+tUSD_6uzguGXtj04WfbpT0z9M28r8z-g62Z=A@mail.gmail.com>
Subject: WiF Transmit Power Control (TPC) Regulatory Requirements?
To: Seth Forshee <sforshee@kernel.org>, Kalle Valo <kvalo@codeaurora.org>, 
	Johannes Berg <johannes@sipsolutions.net>
Cc: wireless-regdb <wireless-regdb@lists.infradead.org>, 
	linux-wireless <linux-wireless@vger.kernel.org>
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Hi folks,

I wanted to clarify the current state of things.

As far as I know the kernel doesn't have facilities to support TPC or
transmit power control, nor does the wireless-regdb database. And so
in the database we would either omit rules that require TPC, or include
alternative rules (as specified by local regulations) not requiring TPC.
Am I right?

This came up recently with regulatory changes for Singapore and Armenia.

For Singapore [1], the 5.250 =E2=80=93 5.350 GHz range has provisions that =
allow
usage without TPC at a lower power, but the 5.470 =E2=80=93 5.725 GHz does =
not.

For Armenia [2], the updated text (translated by Google Translate) as I
read it requires TPC for all 5 GHz channels.


Thanks
ChenYu

[1] https://www.imda.gov.sg/-/media/imda/files/regulation-licensing-and-con=
sultations/ict-standards/telecommunication-standards/radio-comms/imdatssrd.=
pdf
[2] https://www.arlis.am/DocumentView.aspx?DocID=3D181829