From nobody Sun Apr 5 13:07:05 2026 Received: from esa.microchip.iphmx.com (esa.microchip.iphmx.com [68.232.154.123]) (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 6F6BF36165D; Tue, 17 Feb 2026 14:07:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=68.232.154.123 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771337264; cv=none; b=UkNfcS0UTMyh4iETps0j3I56vFTyQDnQODkLsVizWV0npYB5DIVlcVVP8f2wRNA/ISrbpVTmxszlhjie2ntQHPrxkNXiMEOTB3ImwiKtttEty0VTDWibtBaqdQXHZzV54TTtWwtr8455Y1ZxzWl7zGvnuiNMpZTJLx9dTBb9OHY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771337264; c=relaxed/simple; bh=S9OUibKHbi69i0rxDsGt3stdu3AkJ8WpagkUyVkNc1s=; h=From:Date:Subject:MIME-Version:Content-Type:Message-ID:References: In-Reply-To:To:CC; b=cJgUpLyypUe4n07s8VMF1zyf5IX046qmIvgSLhxZWkI5X1Xv9qBydu6MBcJdD2Hd7+tS186WasOAb9nNdXs9P9uaIsBargHsglLYVAaHWXZ9GX6eFr4J5RuQbu7LzfhIeukMLOros1RkbFVI/YldczYBcgtUcz5qEK3NSd+GhJk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=microchip.com; spf=pass smtp.mailfrom=microchip.com; dkim=pass (2048-bit key) header.d=microchip.com header.i=@microchip.com header.b=LeMAF7AH; arc=none smtp.client-ip=68.232.154.123 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=microchip.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=microchip.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=microchip.com header.i=@microchip.com header.b="LeMAF7AH" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1771337262; x=1802873262; h=from:date:subject:mime-version:content-transfer-encoding: message-id:references:in-reply-to:to:cc; bh=S9OUibKHbi69i0rxDsGt3stdu3AkJ8WpagkUyVkNc1s=; b=LeMAF7AHFRh0qi7WVn4l0ALXnGqj2GqWkztHfI3q6xSmrpHYBrIVYtAl BadmpF5g8ntxHwtCoggNk0a0feME7QF8YdtsX8/spq3ueC99FakpOQdiU J81E/1JD3MxJ+vjKZxCj9Cvh0ZV5WG2sRqOCys6wWkw3w9A1j/GHW3ebe e+y+LEv+hvZ9aeEuX+vv4lae+/b7Knj/3nuA+sQdqhGh8VxcKGIYRjg1C UekuKmptRyUs19KvuShH5n3qk/BzHOr/K5FqxjpdhzqyYQ+9tFZSAYNe+ TE06/EkoZKEMpJHOqYIb/o4KnuVQ9J20sOEIRVqCEjYWmnnmWhfuGnEng Q==; X-CSE-ConnectionGUID: NsNq/mm8SHKghX7/+9wqEA== X-CSE-MsgGUID: c7/PFTOSRGe9Meo9MH2Stw== X-IronPort-AV: E=Sophos;i="6.21,296,1763449200"; d="scan'208";a="53912587" X-Amp-Result: SKIPPED(no attachment in message) Received: from unknown (HELO email.microchip.com) ([170.129.1.10]) by esa2.microchip.iphmx.com with ESMTP/TLS/ECDHE-RSA-AES128-GCM-SHA256; 17 Feb 2026 07:07:34 -0700 Received: from chn-vm-ex01.mchp-main.com (10.10.85.143) by chn-vm-ex04.mchp-main.com (10.10.85.152) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.58; Tue, 17 Feb 2026 07:07:24 -0700 Received: from [127.0.1.1] (10.10.85.11) by chn-vm-ex01.mchp-main.com (10.10.85.143) with Microsoft SMTP Server id 15.1.2507.58 via Frontend Transport; Tue, 17 Feb 2026 07:07:22 -0700 From: Victor Duicu Date: Tue, 17 Feb 2026 16:06:13 +0200 Subject: [PATCH v10 1/2] dt-bindings: hwmon: add support for MCP998X 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-Transfer-Encoding: quoted-printable Message-ID: <20260217-add-mcp9982-hwmon-v10-1-5e0aaae6f289@microchip.com> References: <20260217-add-mcp9982-hwmon-v10-0-5e0aaae6f289@microchip.com> In-Reply-To: <20260217-add-mcp9982-hwmon-v10-0-5e0aaae6f289@microchip.com> To: Guenter Roeck , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Jonathan Corbet CC: , , , , , X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1771337236; l=7280; i=victor.duicu@microchip.com; s=20260213; h=from:subject:message-id; bh=S9OUibKHbi69i0rxDsGt3stdu3AkJ8WpagkUyVkNc1s=; b=pzkwLtbuG8xgwLuNu7KX4mnVRyE5tuCCfwP10t6N+yH8pJb5Xl3ZvVpx/DHXmDYqVXD1rdJp3 nRoBC8LKGM+BoNyGbEgnIDIUSy+RURg2fJntaYFIfe+ec/Oc8pwqFwc X-Developer-Key: i=victor.duicu@microchip.com; a=ed25519; pk=/o+aE26HN3Piv9T5t+efqb0aeJw9ErwMPeSC8lYXQsA= This is the devicetree schema for Microchip MCP998X/33 and MCP998XD/33D Multichannel Automotive Temperature Monitor Family. Signed-off-by: Victor Duicu --- .../bindings/hwmon/microchip,mcp9982.yaml | 223 +++++++++++++++++= ++++ MAINTAINERS | 6 + 2 files changed, 229 insertions(+) diff --git a/Documentation/devicetree/bindings/hwmon/microchip,mcp9982.yaml= b/Documentation/devicetree/bindings/hwmon/microchip,mcp9982.yaml new file mode 100644 index 000000000000..b59c64e9886d --- /dev/null +++ b/Documentation/devicetree/bindings/hwmon/microchip,mcp9982.yaml @@ -0,0 +1,223 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/hwmon/microchip,mcp9982.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Microchip MCP998X/33 and MCP998XD/33D Temperature Monitor + +maintainers: + - Victor Duicu + +description: | + The MCP998X/33 and MCP998XD/33D family is a high-accuracy 2-wire + multichannel automotive temperature monitor. + The datasheet can be found here: + https://ww1.microchip.com/downloads/aemDocuments/documents/MSLD/Produc= tDocuments/DataSheets/MCP998X-Family-Data-Sheet-DS20006827.pdf + +properties: + compatible: + enum: + - microchip,mcp9933 + - microchip,mcp9933d + - microchip,mcp9982 + - microchip,mcp9982d + - microchip,mcp9983 + - microchip,mcp9983d + - microchip,mcp9984 + - microchip,mcp9984d + - microchip,mcp9985 + - microchip,mcp9985d + + reg: + maxItems: 1 + + interrupts: + maxItems: 2 + + interrupt-names: + description: + The chip family has three different interrupt pins divided among the= m. + The chips without "D" have alert-therm and therm-addr. + The chips with "D" have alert-therm and sys-shtdwn. + minItems: 1 + maxItems: 2 + items: + enum: [alert-therm, therm-addr, sys-shtdwn] + + "#address-cells": + const: 1 + + "#size-cells": + const: 0 + + microchip,enable-anti-parallel: + description: + Enable anti-parallel diode mode operation. + MCP9984/84D/85/85D and MCP9933/33D support reading two external diod= es + in anti-parallel connection on the same set of pins. + type: boolean + + microchip,parasitic-res-on-channel1-2: + description: + Indicates that the chip and the diodes/transistors are sufficiently = far + apart that a parasitic resistance is added to the wires, which can a= ffect + the measurements. Due to the anti-parallel diode connections, channe= ls + 1 and 2 are affected together. + type: boolean + + microchip,parasitic-res-on-channel3-4: + description: + Indicates that the chip and the diodes/transistors are sufficiently = far + apart that a parasitic resistance is added to the wires, which can a= ffect + the measurements. Due to the anti-parallel diode connections, channe= ls + 3 and 4 are affected together. + type: boolean + + microchip,power-state: + description: + The chip can be set in Run state or Standby state. In Run state the = ADC + is converting on all channels at the programmed conversion rate. + In Standby state the host must initiate a conversion cycle by writing + to the One-Shot register. + True value sets Run state. + Chips with "D" in the name can only be set in Run mode. + type: boolean + + vdd-supply: true + +patternProperties: + "^channel@[1-4]$": + description: + Represents the external temperature channels to which + a remote diode is connected. + type: object + + properties: + reg: + items: + maxItems: 1 + + label: + description: Unique name to identify which channel this is. + + required: + - reg + + additionalProperties: false + +required: + - compatible + - reg + - vdd-supply + +allOf: + - if: + properties: + compatible: + contains: + enum: + - microchip,mcp9982d + - microchip,mcp9983d + - microchip,mcp9984d + - microchip,mcp9985d + - microchip,mcp9933d + then: + properties: + interrupt-names: + not: + contains: + const: therm-addr + required: + - microchip,power-state + - microchip,parasitic-res-on-channel1-2 + - microchip,parasitic-res-on-channel3-4 + else: + properties: + microchip,power-state: true + interrupt-names: + not: + contains: + const: sys-shtdwn + + - if: + properties: + compatible: + contains: + enum: + - microchip,mcp9982 + - microchip,mcp9982d + then: + properties: + microchip,enable-anti-parallel: false + patternProperties: + "^channel@[2-4]$": false + + - if: + properties: + compatible: + contains: + enum: + - microchip,mcp9983 + - microchip,mcp9983d + then: + properties: + microchip,enable-anti-parallel: false + patternProperties: + "^channel@[3-4]$": false + + - if: + properties: + compatible: + contains: + enum: + - microchip,mcp9933 + - microchip,mcp9933d + then: + patternProperties: + "^channel@[3-4]$": false + + - if: + properties: + compatible: + contains: + enum: + - microchip,mcp9984 + - microchip,mcp9984d + then: + properties: + channel@4: false + +additionalProperties: false + +examples: + - | + i2c { + #address-cells =3D <1>; + #size-cells =3D <0>; + + temperature-sensor@4c { + compatible =3D "microchip,mcp9985"; + reg =3D <0x4c>; + + #address-cells =3D <1>; + #size-cells =3D <0>; + + microchip,enable-anti-parallel; + microchip,parasitic-res-on-channel1-2; + microchip,parasitic-res-on-channel3-4; + vdd-supply =3D <&vdd>; + + channel@1 { + reg =3D <1>; + label =3D "Room Temperature"; + }; + + channel@2 { + reg =3D <2>; + label =3D "GPU Temperature"; + }; + }; + }; + +... diff --git a/MAINTAINERS b/MAINTAINERS index e08767323763..026510a4129c 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -17160,6 +17160,12 @@ S: Maintained F: Documentation/devicetree/bindings/iio/adc/microchip,mcp3911.yaml F: drivers/iio/adc/mcp3911.c =20 +MICROCHIP MCP9982 TEMPERATURE DRIVER +M: Victor Duicu +L: linux-hwmon@vger.kernel.org +S: Supported +F: Documentation/devicetree/bindings/hwmon/microchip,mcp9982.yaml + MICROCHIP MMC/SD/SDIO MCI DRIVER M: Aubin Constans S: Maintained --=20 2.51.0