linux-kernel - Re: [PATCH 00/13] Analog Devices Inc. Automotive Audio Bus (A2B) support

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Message-ID: <ucrnnveh2n3nhonbhvpxy7sl3ffaj3cdcx7pnb2h4dj5cwsznh@gfssqshjortk>
Date: Fri, 17 May 2024 16:57:57 +0200
From: Wolfram Sang <wsa+renesas@...g-engineering.com>
To: Alvin Šipraga <alvin@...s.dk>
Cc: Mark Brown <broonie@...nel.org>, 
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>, "Rafael J. Wysocki" <rafael@...nel.org>, 
	Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
	Conor Dooley <conor+dt@...nel.org>, Linus Walleij <linus.walleij@...aro.org>, 
	Bartosz Golaszewski <brgl@...ev.pl>, Liam Girdwood <lgirdwood@...il.com>, 
	Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>, 
	Michael Turquette <mturquette@...libre.com>, Stephen Boyd <sboyd@...nel.org>, 
	Andi Shyti <andi.shyti@...nel.org>, Saravana Kannan <saravanak@...gle.com>, 
	Emil Svendsen <emas@...g-olufsen.dk>, linux-kernel@...r.kernel.org, devicetree@...r.kernel.org, 
	linux-gpio@...r.kernel.org, linux-sound@...r.kernel.org, linux-clk@...r.kernel.org, 
	linux-i2c@...r.kernel.org, Alvin Šipraga <alsi@...g-olufsen.dk>
Subject: Re: [PATCH 00/13] Analog Devices Inc. Automotive Audio Bus (A2B)
 support


>   On subordinate nodes the I2C interface functions in controller
>   (master) mode, providing an additional I2C adapter to the host for
>   each subordinate node connected to the A2B bus.

I am not sure I got this right? That would mean for an I2C adapter on a
subordinate node, that there might be targets connected to only that
subordinate node? How do its messages go to the host machine? Is I2C
encapsulated over I2C? I probably missed something.


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