From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out-180.mta0.migadu.com (out-180.mta0.migadu.com [91.218.175.180]) (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 26CD630566C for ; Tue, 21 Jul 2026 09:48:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.218.175.180 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784627330; cv=none; b=GqoL2yPL7tsNdVE62UBHY07vZ/PODn0N9ozaujqoO7ZouA4NHMQTrCHpIKocSbv+g3uCsZXOPej5jcvsDMBKuKfAtG1MNUoGvbJF5YdSuRH6Xuj9mq3fQJgCDmgp68t8ymexrxRA0RgyQIMMxzIvut6JRmMAgv/X64jAeVTy7FE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784627330; c=relaxed/simple; bh=ZuBbGDtILLJc9cljeN2cxK5OUQN09Do0FRqsNBN0hcg=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type:To:Cc; b=ie3A6eHO/nsTxtOTkuLFgwr39MDKpOvkTd2NySjYKmlGix01n/iA97+fe12ODn+BKiSkDITmFa12jzwIi6WfHJ3wfgURX9Ow7AIiik4IQsP0MfYdt6Kep4hfT3hS2VV6aRQUU20D1gncErhUmo5CMdWV9Nzbkemg90G0SqsPVMo= 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=n34G9VU4; arc=none smtp.client-ip=91.218.175.180 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="n34G9VU4" X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1784627326; 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=qItdemN2VjjBBlZQtxInsZBw9ADrmvr0MbevsqcHD1s=; b=n34G9VU4ASHowXrkO6ymj5wOj+Hhz7LPiaXvB2nNIMszIkqTdqaEIdEqRQdFDIwZy2TELB 1B8P2aCnGrmLwmfzmmiy2ejsxcHXyvwgkGRFI91I+UfnaSHtBXAerO/qobiXIuKJLn4ySC ii6P833hl+YUP9JDkrHTOMlsoRjfL8U= From: Troy Mitchell Subject: [PATCH v2 0/6] hwmon: (lm63) Add Sensylink CTF2301 support Date: Tue, 21 Jul 2026 02:48:26 -0700 Message-Id: <20260721-ctl2301-v2-0-ef5fb342872a@linux.dev> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-B4-Tracking: v=1; b=H4sIAAAAAAAC/2XMQQ6CMBCF4auQWVszHSoFV97DsNAyyCQESIsNh vTuVrYu/5eXb4fAXjjAtdjBc5Qg85SDTgW44TG9WEmXGwjpgo2ulFtHKlErNLp6oi0d1Qj5vXj uZTuke5t7kLDO/nPAUf/WfyNmRjWWratNT87Y2yjTezt3HKFNKX0BUHUPFZ4AAAA= X-Change-ID: 20250916-ctl2301-0416b073c280 To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Guenter Roeck , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Yixun Lan , Jonathan Corbet , Shuah Khan Cc: Troy Mitchell , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-riscv@lists.infradead.org, spacemit@lists.linux.dev, linux-doc@vger.kernel.org, Jean Delvare X-Developer-Signature: v=1; a=openpgp-sha256; l=5529; i=troy.mitchell@linux.dev; h=from:subject:message-id; bh=ZuBbGDtILLJc9cljeN2cxK5OUQN09Do0FRqsNBN0hcg=; b=owGbwMvMwCU2g/N9w09jE33G02pJDFnxDnlPzDzTcg1bZky8su906bqlev4H332b6yFzQoa5q HVvmNe3jlIWBjEuBlkxRZbuBzzbCnyibAsECn1h5rAygQxh4OIUgImsusLwv+jXFbtlq7vbTv8+ sFswl8eiv7VaRfjlhr6NOdlnF3m8b2Bk+KvafvfxloTObI0oqa2rk5nXeHNtbau2s3r3cmPR/sU PeQE= X-Developer-Key: i=troy.mitchell@linux.dev; a=openpgp; fpr=3FE5535CF1B0E658E57DB59BAE1C2FBEA7DB42E1 X-Migadu-Flow: FLOW_OUT Sensylink CTF2301 is a system-level thermal management solution chip. The CTF2301 is an I2C/SMBus compatible device featuring: - One local temperature sensor with +/-0.5 degree C accuracy and 0.0625 degree C resolution. - One remote temperature sensor for external diode-connected transistors, offering +/-1 degree C accuracy and 0.125 degree C resolution (temperature range: -40 degree C to +125 degree C). - An integrated PWM fan controller capable of operating in two modes: 1. Direct-DCY: Open-loop direct duty cycle control. 2. Auto-Temp: Closed-loop automatic fan speed control based on measured temperature. - A 1-channel fan speed monitor (TACH input) for RPM measurement. As Guenter pointed out on v1, the CTF2301 register map is a near match for the LM63/LM96163 family (local and remote temperature, tachometer and PWM fan control), so this version drops the standalone ctf2301 driver and instead adds CTF2301 as a new chip type in the existing lm63 driver. This reuses the shared temperature, limit, alarm and PWM handling instead of duplicating it. The CTF2301-specific differences are handled on top of lm63: 12-bit local temperature input and high-limit values, nine conversion rates, 12 fan-control lookup table entries, and optional 22.5 kHz high-resolution PWM. When no IRQ is described, the shared ALERT/TACH pin is configured as a tachometer input. The LM63 family can also register as a thermal cooling device when the device tree provides the #cooling-cells property. The required SpacemiT I2C controller clock series has been merged but is not yet included in an rc release: https://lore.kernel.org/all/20260508-k1-i2c-ilcr-v7-0-8c2dde5c3ed5@linux.spacemit.com/ Apply that series before testing this series on K3. Without it, the I2C controller cannot generate an accurate 400 kHz SCL clock and CTF2301 accesses may fail. Tested on a SpacemiT K3 CoM260 by booting an initramfs and verifying the CTF2301 probe. Temperature, tachometer, PWM, and conversion-rate behavior were checked against direct I2C register accesses and the datasheet. Datasheet: https://www.sensylink.com/upload/1/net.sensylink.portal/1689557281035.pdf Register description: https://github.com/TroyMitchell911/ctf2301-datasheet Signed-off-by: Troy Mitchell --- Changes in v2: - Replace the standalone CTF2301 driver with a new lm63 chip type, as suggested by Guenter, reusing the existing temperature, limit, alarm, tachometer, PWM, and automatic fan-control paths. - Add the temperature thresholds, alarms, and automatic fan-control lookup table support which were missing from the v1 driver. - Handle CTF2301-specific 12-bit local temperature values, nine conversion rates, 12 lookup table entries, shared ALERT/TACH pin, and optional 22.5 kHz high-resolution PWM. - Propagate SMBus failures from lm63 initialization and write paths. - Add optional thermal cooling-device support for the LM63 family using the existing manual PWM control path. - Move the National LM63-family compatibles from trivial-devices.yaml to a dedicated binding which permits #cooling-cells. - Add CTF2301 to the LM63-family binding instead of keeping the standalone schema from v1. Do not declare #cooling-cells on K3 CoM260 yet because the board has no thermal consumer. - Fix the binding errors reported by Rob by using a plain compatible string and wrapping the description. - Document CTF2301 support in the lm63 hwmon documentation and provide the detailed register description used for review. - Add the K3 CoM260 I2C6 pinctrl state and CTF2301 device node for hardware testing. - Link to v1: https://lore.kernel.org/r/20250916-ctl2301-v1-0-97e7c84f2c47@linux.dev To: Rob Herring To: Krzysztof Kozlowski To: Conor Dooley To: Guenter Roeck To: Paul Walmsley To: Palmer Dabbelt To: Albert Ou To: Alexandre Ghiti To: Yixun Lan To: Jonathan Corbet To: Shuah Khan Cc: devicetree@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: linux-hwmon@vger.kernel.org Cc: linux-riscv@lists.infradead.org Cc: spacemit@lists.linux.dev Cc: linux-doc@vger.kernel.org --- Troy Mitchell (6): dt-bindings: vendor-prefixes: Add Sensylink dt-bindings: hwmon: Move LM63 family to a dedicated binding dt-bindings: hwmon: Add Sensylink CTF2301 hwmon: (lm63) Add Sensylink CTF2301 support riscv: dts: spacemit: Add K3 I2C6 pinctrl state riscv: dts: spacemit: Add CTF2301 on K3 CoM260 .../devicetree/bindings/hwmon/national,lm63.yaml | 52 +++ .../devicetree/bindings/trivial-devices.yaml | 6 - .../devicetree/bindings/vendor-prefixes.yaml | 2 + Documentation/hwmon/lm63.rst | 22 ++ arch/riscv/boot/dts/spacemit/k3-com260.dtsi | 19 + arch/riscv/boot/dts/spacemit/k3-pinctrl.dtsi | 11 + drivers/hwmon/Kconfig | 8 +- drivers/hwmon/lm63.c | 393 +++++++++++++++++---- 8 files changed, 433 insertions(+), 80 deletions(-) --- base-commit: a13c140cc289c0b7b3770bce5b3ad42ab35074aa change-id: 20250916-ctl2301-0416b073c280 Best regards, -- Troy Mitchell