From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 20923C624D0 for ; Mon, 31 Aug 2026 13:46:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Cc:To:MIME-Version:Message-Id:Date: Subject:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=c351SDZ8Il3NG4V4Hg0awLzeOloRf6A3Ar0JNytmp9A=; b=1RxJQezl4Wesq+ KYMhe0Wgl/kiupjwl/yVQrLhtKFl44LrdsfGurHM2n0DCEGwgEJYkFfBh6jbKSDjZyrYYetzSjWTs SrqXTRLAY1CCuQooXdpSF6bAkFyy0cjfYwZ9d+ToCZROEE3Ju1VzXOp67Ti41G0OuH/qWQIVaKw1A fmvxEZ5BewdTJfui7AuoEHC+XfzdI/HDXVM6WoPS9tGj+V3oOZZAScg1xmpd3Sh1etFGPgHFxo9P7 eYOXiLBNe71oCmW97HKCcw26tV80KkmlwsJFoHMBUD56ANjEyIdWrlWvpzlcR3B60gas9ZL4lzN3Z TrOwDHju6SBWsp4grEBg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1x12L8-00000009VeC-0aJA; Mon, 31 Aug 2026 13:46:22 +0000 Received: from out-87.mta0.migadu.com ([2001:41d0:1004:224b::57] helo=mta0.migadu.com) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1x12L4-00000009Va6-3Ejh for linux-riscv@lists.infradead.org; Mon, 31 Aug 2026 13:46:21 +0000 X-Envelope-To: linux-riscv@lists.infradead.org DKIM-Signature: a=rsa-sha256; bh=4sOV2VNRFkq1pHeUz3nNi7RwZiKEAQIRADc2LFEX5Ds=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1788183975; v=1; x=1788788775; b=EqyclMkNvE9Fa7uGT/nt2t5AwVJEHpw8b0z/5USvlcfGljjFtbaUoPxRcXaU0b3Sd9H9s12q lYieZwtGi1/2LVCwFEUIkcTGInIabFd2cvt8x1jWzlDJemuOm8cTFINny4j+hD/iZOXQ/GR/NQ+ KrWZ/IBlqruoKY0EhFIvU1V8= X-Envelope-To: linux-riscv@lists.infradead.org Received: by mta12.migadu.com with ESMTPS id 294f638ff147a52c; Mon, 31 Aug 2026 13:46:14 +0000 X-Mizu-Trace-ID: 294f638ff147a52c X-Migadu-Flow: FLOW_OUT From: Troy Mitchell Subject: [PATCH v4 0/6] hwmon: (lm63) Add Sensylink CTF2301 support Date: Mon, 31 Aug 2026 21:45:34 +0800 Message-Id: <20260831-ctl2301-v4-0-b335d52a0570@linux.dev> MIME-Version: 1.0 X-B4-Tracking: v=1; b=H4sIAAAAAAAC/2XMTQ6CMBCG4auQrq2ZTgutrryHcUH/pAkBU7DBE O5uITEYXX6Ted6ZDC4GN5BzMZPoUhhC3+UhDgUxTd3dHQ02b4KAJZxYRc3YIgdGQbBKg+QGFZD 8/YjOh2krXW95N2EY+/jawomt1/9Gyhl6kk4aJTwaIS9t6J7T0bpE1kbCj6tAItsdZud86TUXq CTWv47vTkG5O56dt0Ir73WpwX67ZVneqfBtoQ4BAAA= 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 , Randy Dunlap 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, Krzysztof Kozlowski , Jean Delvare X-Mailer: b4 0.15.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=6578; i=troy.mitchell@linux.dev; h=from:subject:message-id; bh=4sOV2VNRFkq1pHeUz3nNi7RwZiKEAQIRADc2LFEX5Ds=; b=owGbwMvMwCU2g/N9w09jE33G02pJDFlTW2cYFpzX0tfRznow51Twh5mdVrGms5u4l+i9lw5XW 7jJgHt1RykLgxgXg6yYIkv3A55tBT5RtgUChb4wc1iZQIYwcHEKwETi1zD80987WdjR6uSUAs+Q NocN7y42ntDW+Cj9w6ks6+mjM+zmagz/zHcwSU/ydDa1NM+d+72umOP3PcXt62JfVf7uUI/j9n3 PBAA= X-Developer-Key: i=troy.mitchell@linux.dev; a=openpgp; fpr=3FE5535CF1B0E658E57DB59BAE1C2FBEA7DB42E1 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260831_064619_113301_9852CDBD X-CRM114-Status: GOOD ( 18.53 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org 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. 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 v4: - Rebase onto v7.3-rc1, which includes the SpacemiT I2C timing prerequisite, and remove the obsolete dependency note. - Do not add the SENSORS_LM63 THERMAL dependency suggested on v3 because CONFIG_THERMAL is boolean and v7.3-rc1 removes such tautological expressions. - Preserve the upstream five-bit PWM frequency multiplier mask in the LM63 initialization error-handling path. - Sort the chip type enum and remove redundant CTF2301 8-bit local temperature cache updates. - Serialize CTF2301 12-bit local temperature cache reads. - Keep PWM configuration caches synchronized after partial I2C write failures. - Override the CoM260 I2C6 pin configuration through &i2c6_1_cfg, as suggested by Yixun. - Add Krzysztof's Acked-by and Reviewed-by tags. - Link to v3: https://patch.msgid.link/20260805-ctl2301-v3-0-fd4b8ffb5b0d@linux.dev Changes in v3: - Add the Sensylink website link to the vendor-prefix commit. - Preserve the optional interrupt from the trivial-devices binding. - Explain in the commit message of patch 3/6 why CTF2301 cannot use national,lm63 as a fallback compatible. - Check both bytes of CTF2301 local temperature values before caching them. - Use the schema-valid 25 mA drive strength for the K3 I2C6 pins. - Link to v2: https://patch.msgid.link/20260721-ctl2301-v2-0-ef5fb342872a@linux.dev 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 To: Randy Dunlap 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 | 55 +++ .../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 | 17 + arch/riscv/boot/dts/spacemit/k3-pinctrl.dtsi | 11 + drivers/hwmon/Kconfig | 8 +- drivers/hwmon/lm63.c | 426 +++++++++++++++++---- 8 files changed, 462 insertions(+), 85 deletions(-) --- base-commit: cee9395acd8043be0644b25c34bfa86623f2b935 change-id: 20250916-ctl2301-0416b073c280 Best regards, -- Troy Mitchell _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv