From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.zeus03.de (zeus03.de [194.117.254.33]) (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 144DD3093BB for ; Fri, 29 Aug 2025 10:58:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=194.117.254.33 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756465096; cv=none; b=bGXNi6tcGwGc4R3kuqsIOg/0ygdYfC/szitZ5NqkUX04NnEQt8jDrO5pVOMavHRUF8Tx1cviIIlA63wZ4LHm6PAinuE5eruME6dwqD1Yiy+3Q2smryuVhA19GGcePclvIJ32miT2DW3tau8f9+z+UtQIwdX0Izi6VVRC0L2U96Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756465096; c=relaxed/simple; bh=q/08LL+SXzR6//jDK7WpI8nzQaBvjLSRUy0vX6WfhxQ=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=GthBRrbhMJO4PTetvCqfVwPl8yosSZ+Y0i+KuPwJt38jfnEqS4EP/KxKvwbZ6VrbsWtGWwO3+mDm6GYMPoCdzepsnVhIDV3XhgpWEXFgjdey+komn9TbpY2i0jHNO47YhPIgNIkSu4lUdDDMSC8eQHk+z1g5E2ya+6dPwyU9JCc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=sang-engineering.com; spf=pass smtp.mailfrom=sang-engineering.com; dkim=pass (2048-bit key) header.d=sang-engineering.com header.i=@sang-engineering.com header.b=bmlWzEjv; arc=none smtp.client-ip=194.117.254.33 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=sang-engineering.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=sang-engineering.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=sang-engineering.com header.i=@sang-engineering.com header.b="bmlWzEjv" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= sang-engineering.com; h=date:from:to:cc:subject:message-id :references:mime-version:content-type:content-transfer-encoding :in-reply-to; s=k1; bh=JvYspSjJqIX13ORpeSK/3a180T+CNY8WXnLqQrGrl NI=; b=bmlWzEjvdgk7JZx4qCDrT6KNbhqYchZLcyd/jIISoPHqgIo4UfnakMSQv +9vM7+7726uXmSg13Ji+Cb6l//0FoABIY80IUxjmcmHHBJOSGAGN4wupWQu0/DF4 6mVvR6G0+jxz680FggV2yFj7fJ2aK1qFPcjHFzBwHfTzWYLnpd9YJwOfrMR/kj3e ukexWVHzePOPeJuzcQ7Ba10SyT4Uaq/2Pseaq7aS9DYNclr3q5WtakvySIbN4FUC YyTJy2N7qdijDaq6IxNIwtYXVazT2t51omfIJZJzx3B40Uct4slKCzEaCW/qayu4 fLiTYvWm1xuiTM9+Fh9sJ5zl0IyIQ== Received: (qmail 1426363 invoked from network); 29 Aug 2025 12:58:06 +0200 Received: by mail.zeus03.de with UTF8SMTPSA (TLS_AES_256_GCM_SHA384 encrypted, authenticated); 29 Aug 2025 12:58:06 +0200 X-UD-Smtp-Session: l3s3148p1@OgmJ5X49Jq0gAwDPXwOZADQgI+b4m0Li Date: Fri, 29 Aug 2025 12:58:06 +0200 From: Wolfram Sang To: Herve Codina Cc: Rob Herring , Luca Ceresoli , Ayush Singh , Andi Shyti , Krzysztof Kozlowski , Conor Dooley , linux-i2c@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree-spec@vger.kernel.org, Thomas Petazzoni Subject: Re: [PATCH v3 1/1] schemas: i2c: Introduce I2C bus extensions Message-ID: References: <20250618082313.549140-1-herve.codina@bootlin.com> <20250618082313.549140-2-herve.codina@bootlin.com> <20250808180746.6fa6a6f9@booty> <20250829125238.4117947f@bootlin.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20250829125238.4117947f@bootlin.com> Hi Hervé, > the only solution I see is to parse the full DT in order to find extension > nodes when we need to register adapter children (adapter probe() step). > > A matching extension node will be a node where: > 1) compatible = "i2c-bus-extension" > 2) "i2c-parent" phandle points to the expected adapter. Would that be so bad? It will not be done often, or? All the best, Wolfram