From patchwork Tue Apr 1 08:10:38 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Herve Codina X-Patchwork-Id: 877549 Received: from relay8-d.mail.gandi.net (relay8-d.mail.gandi.net [217.70.183.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9E32B132103; Tue, 1 Apr 2025 08:10:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.70.183.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743495062; cv=none; b=esyUqqXdhkzZBGH71ng4PWQTt8P3UNIVx9XzYz5FbpTgRYVp+m10CLyBesqHeGOg1pe+pNiwOfPMK9mgc8BSvGRkvPpxdZAo91wqbpdFsQw0Ty7ir86QpzEnX7vpfn3V+j5mT9/wywdBilF1LM73vy+2PAieHg/9XTvVPbm9HnQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743495062; c=relaxed/simple; bh=BAOOCyDh7128Gf6xKr/E8pz3C5wmnjftErUM/zHUJPA=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version:Content-Type; b=eG1Jh4Rua3AR3GFMpkn7GRKztkOLsbz8STskyPXtbPWGyyJyWOCNysdh9sWHzmG/6A2Wou1ibD0HGOThG05Fo08k27MQnOsoPEplxTqLlcA1vrnJIOsB/kOESkuLMvKDn4pFjEatE0iAncQFfTOw/B2msuHIcq5oGW/W+09zMiE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=JhwsZLh8; arc=none smtp.client-ip=217.70.183.201 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="JhwsZLh8" Received: by mail.gandi.net (Postfix) with ESMTPA id 16BE5433F1; Tue, 1 Apr 2025 08:10:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1743495052; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=PRCHZq5QRln/HfzZm2RI8VZaUdthL6BYmvZIMg3bZ7g=; b=JhwsZLh8tjVeKmy4hx5iZ52Irb+c2Nd9NamhkJOEDXHP1BURrGqObazEOHDROMbqxzbOJI lnLTdv2RyzBop3+VRtcGJ9azkuL3/nOxnXZBmxaSxuhvqCBIp7bVEArriosOTR8tBMMTO0 LsY+seS/Cgml2RLiMXVTby8YsSKmh8r82tDrvU2dCCTvP48f7FB+r+GOUHHF/VwLSIpeo4 hoOH9v6KKX2v73SCNJ1uxEYEOvmYML81+7O5XhwkD79p4Ns+08vbXjvRuNp0gwWdZLreX9 zRP0aV8f9n30ZjmQMdJyP4sFsx/dOnY54l32mQFkNtac9T3VmWAa+FH1MMBPvQ== From: Herve Codina To: Wolfram Sang , Andi Shyti , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: linux-i2c@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree-spec@vger.kernel.org, Luca Ceresoli , Thomas Petazzoni , Herve Codina Subject: [PATCH 0/2] i2c: Introduce I2C bus extensions Date: Tue, 1 Apr 2025 10:10:38 +0200 Message-ID: <20250401081041.114333-1-herve.codina@bootlin.com> X-Mailer: git-send-email 2.49.0 Precedence: bulk X-Mailing-List: linux-i2c@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-GND-State: clean X-GND-Score: -100 X-GND-Cause: gggruggvucftvghtrhhoucdtuddrgeefvddrtddtgddukedvvdelucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecuifetpfffkfdpucggtfgfnhhsuhgsshgtrhhisggvnecuuegrihhlohhuthemuceftddunecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenucfjughrpefhvfevufffkffogggtgfesthekredtredtjeenucfhrhhomhepjfgvrhhvvgcuvehoughinhgruceohhgvrhhvvgdrtghoughinhgrsegsohhothhlihhnrdgtohhmqeenucggtffrrghtthgvrhhnpeelteduffeltddvtdffgedugfejffeggeekheejiefggfeivefhkeffheehheeiueenucffohhmrghinhepkhgvrhhnvghlrdhorhhgnecukfhppedvrgdtudemvgdtrgemvdegieemjeejledtmedviegtgeemvgdvvdemiedtfegumeehkegrnecuvehluhhsthgvrhfuihiivgeptdenucfrrghrrghmpehinhgvthepvdgrtddumegvtdgrmedvgeeimeejjeeltdemvdeitgegmegvvddvmeeitdefugemheekrgdphhgvlhhopehlohgtrghlhhhoshhtrdhlohgtrghlughomhgrihhnpdhmrghilhhfrhhomhephhgvrhhvvgdrtghoughinhgrsegsohhothhlihhnrdgtohhmpdhnsggprhgtphhtthhopeduvddprhgtphhtthhopeifshgrodhrvghnvghsrghssehsrghnghdqvghnghhinhgvvghrihhnghdrtghomhdprhgtphhtthhopegrnhguihdrshhhhihtiheskhgvrhhnvghlrdhorhhgpdhrtghpthhtoheprhhos ghhsehkvghrnhgvlhdrohhrghdprhgtphhtthhopehkrhiikhdoughtsehkvghrnhgvlhdrohhrghdprhgtphhtthhopegtohhnohhrodgutheskhgvrhhnvghlrdhorhhgpdhrtghpthhtoheplhhinhhugidqihdvtgesvhhgvghrrdhkvghrnhgvlhdrohhrghdprhgtphhtthhopeguvghvihgtvghtrhgvvgesvhhgvghrrdhkvghrnhgvlhdrohhrghdprhgtphhtthhopehlihhnuhigqdhkvghrnhgvlhesvhhgvghrrdhkvghrnhgvlhdrohhrgh X-GND-Sasl: herve.codina@bootlin.com Hi, An I2C bus can be wired to the connector and allows an add-on board to connect additional I2C devices to this bus. Those additional I2C devices could be described as sub-nodes of the I2C bus controller node however for hotplug connectors described via device tree overlays there is additional level of indirection, which is needed to decouple the overlay and the base tree. This decoupling is performed thanks to the I2C bus extension feature which is introduced and detailed in patch 2 of this series. The implementation related to I2C bus extension has been already proposed as an RFC in Linux [0]. The missing part in this RFC was the binding. This binding related to I2C controller is not available in the Linux repository but in dt-schema repository and so, this series update the I2C controller binding to introduce the feature: - Patch 1 is a fix avoid a wrong matching I2C bus node name. - Patch 2 is the I2C bus extension itself. [0] https://lore.kernel.org/all/20250205173918.600037-1-herve.codina@bootlin.com/ Best regards, Hervé Codina Herve Codina (2): schemas: i2c: Avoid extra characters in i2c nodename pattern schemas: i2c: Introduce I2C bus extensions dtschema/schemas/i2c/i2c-controller.yaml | 69 +++++++++++++++++++++++- 1 file changed, 68 insertions(+), 1 deletion(-)