From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out-179.mta1.migadu.com (out-179.mta1.migadu.com [95.215.58.179]) (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 F0B0912CDBE for ; Mon, 27 Jul 2026 07:26:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=95.215.58.179 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785137200; cv=none; b=MYI6N9iaJQ0w/5bXZEYKBYpE3fciiUgH1kYNjC79NKtxxl/oU7MkDdULnUYDpXwg91ebn0d4+WZRLc+MYTxVLnsYb3WGRcmP+pgaqOvlDXTPTUn4y1VChOo0HMpafsnxR87yZbCV5GJudWKEjz1PDPyOoDVi6WBm5bHD37nO9VM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785137200; c=relaxed/simple; bh=OSMOMMdhr3sgJudgtPi3Zf5hGhHVJV2Gi7WpSc6PQUc=; h=Mime-Version:Content-Type:Date:Message-Id:Cc:Subject:From:To: In-Reply-To:References; b=kcGePcx8yk3AiJdO6asGhlDhuQlOeQaHo0nT0fJ1JMTKbRhSNwZhmd3x4ZvK0uPdFXIvobsDihKRPFJG279LYdg3it81ABRpLzj/FPgePZfoerjpS5Rh2U92JP49dQLzsQbwtYV4DV1iYuWFDI/WhB0pCX7bKFlK+htCMieOHXw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=To1h0LPG; arc=none smtp.client-ip=95.215.58.179 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="To1h0LPG" Precedence: bulk X-Mailing-List: spacemit@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1785137197; 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: in-reply-to:in-reply-to:references:references; bh=UmJ8uGmDc0hqwz3dbUX6RW8a5ofURnJwzsVN39eibdM=; b=To1h0LPGWVHT/8VQA8oTLB+BbCw2hm9pD82X8CxV1puWY/GYeNwhPv9NBXOvSyjgPNlvcr ou9uK0WGT+tiVM9nOTEfuw69UitfFjB50ncPBaNf2MIwXe/bYRuQ31dRkXP9CKQQPd97HU qJHuPjMtDX74mnUjSu4Q4n1ROcbQ0Gk= Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=UTF-8 Date: Mon, 27 Jul 2026 00:26:29 -0700 Message-Id: Cc: , , , , , Subject: Re: [PATCH v2 3/6] dt-bindings: hwmon: Add Sensylink CTF2301 X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: "Troy Mitchell" To: "Troy Mitchell" , "Rob Herring" , "Krzysztof Kozlowski" , "Conor Dooley" , "Guenter Roeck" , "Paul Walmsley" , "Palmer Dabbelt" , "Albert Ou" , "Alexandre Ghiti" , "Yixun Lan" , "Jonathan Corbet" , "Shuah Khan" In-Reply-To: <20260721-handbook-dancing-0c6805fbc94e@spud> References: <20260721-ctl2301-v2-0-ef5fb342872a@linux.dev> <20260721-ctl2301-v2-3-ef5fb342872a@linux.dev> <20260721-handbook-dancing-0c6805fbc94e@spud> X-Migadu-Flow: FLOW_OUT > On Tue, Jul 21, 2026 at 02:48:29AM -0700, Troy Mitchell wrote: >> Add the Sensylink CTF2301 temperature sensor and fan controller to the >> LM63 family binding. The chip follows the LM63 register model and can >> provide a thermal cooling device when #cooling-cells is present. > > Commit message should explain why a fallback compatible is not suitable. The CTF2301 shares the overall register layout with LM63, but it is not fully compatible. In particular, it uses different conversion-rate encodings, extended local-temperature registers, additional fan lookup table entries, and device-specific PWM and ALERT/TACH configuration. An older driver matching the "national,lm63" fallback would therefore not operate the device correctly. I will explain why a fallback compatible is not suitable in the commit message in the next version. - Troy