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dt-bindings: hwmon: temperature: add support for EMC1812
This is the devicetree schema for Microchip EMC1812/13/14/15/33 Multichannel Low-Voltage Remote Diode Sensor Family. It also updates the MAINTAINERS file to include the new driver. EMC1812 has one external remote temperature monitoring channel. EMC1813 has two external remote temperature monitoring channels. EMC1814 has three external remote temperature monitoring channels and channels 2 and 3 support anti parallel diode. EMC1815 has four external remote temperature monitoring channels and channels 1/2 and 3/4 support anti parallel diode. EMC1833 has two external remote temperature monitoring channels and channels 1 and 2 support anti parallel diode. Resistance Error Correction is supported on channels 1/2 and 3/4. Signed-off-by: Marius Cristea <marius.cristea@microchip.com> Reviewed-by: Rob Herring (Arm) <robh@kernel.org> Link: https://lore.kernel.org/r/20260610-hw_mon-emc1812-v11-1-cef809af5c19@microchip.com Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Marius Cristea
Guenter Roeck
parent
1fb4397509
commit
1df240f323
193
Documentation/devicetree/bindings/hwmon/microchip,emc1812.yaml
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193
Documentation/devicetree/bindings/hwmon/microchip,emc1812.yaml
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# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/hwmon/microchip,emc1812.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Microchip EMC1812/13/14/15/33 multichannel temperature sensor
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maintainers:
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- Marius Cristea <marius.cristea@microchip.com>
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description: |
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The Microchip EMC1812/13/14/15/33 is a high-accuracy 2-wire multichannel
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low-voltage remote diode temperature monitor.
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The datasheet can be found here:
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https://ww1.microchip.com/downloads/aemDocuments/documents/MSLD/ProductDocuments/DataSheets/EMC1812-3-4-5-33-Data-Sheet-DS20005751.pdf
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EMC1812 has one external remote temperature monitoring channel
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EMC1813 has two external remote temperature monitoring channels
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EMC1814 has three external remote temperature monitoring channels and
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channels 2 and 3 support anti parallel diode
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EMC1815 has four external remote temperature monitoring channels and
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channels 1/2 and 3/4 support anti parallel diode
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EMC1833 has two external remote temperature monitoring channels and
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channels 1 and 2 support anti parallel diode
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properties:
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compatible:
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enum:
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- microchip,emc1812
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- microchip,emc1813
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- microchip,emc1814
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- microchip,emc1815
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- microchip,emc1833
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reg:
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maxItems: 1
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interrupts:
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items:
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- description: alert-therm2 asserts when the ALERT limit is exceeded.
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- description: therm-addr asserts when the THERM limit is exceeded.
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minItems: 1
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interrupt-names:
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items:
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- const: alert-therm2
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- const: therm-addr
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minItems: 1
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"#address-cells":
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const: 1
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"#size-cells":
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const: 0
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microchip,enable-anti-parallel:
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description:
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Enable anti-parallel diode mode operation. EMC1814, EMC1815 and EMC1833
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support reading two external diodes in anti-parallel connection on the
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same set of pins. Disabling APD functionality to implement substrate
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diodes on devices that support APD eliminates the benefit of APD
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(two diodes on one channel).
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type: boolean
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microchip,parasitic-res-on-channel1-2:
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description:
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Indicates that the chip and the diodes/transistors are sufficiently
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far apart that a parasitic resistance is added to the wires, which can
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affect the measurements. Due to the availability of only a single
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configuration bit in hardware, channels 1 and 2 are affected together.
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If channel 2 is not available in hardware, this setting affects only
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channel 1.
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type: boolean
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microchip,parasitic-res-on-channel3-4:
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description:
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Indicates that the chip and the diodes/transistors are sufficiently
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far apart that a parasitic resistance is added to the wires, which can
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affect the measurements. Due to the availability of only a single
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configuration bit in hardware, channels 3 and 4 are affected together.
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If channel 4 is not available in hardware, this setting affects only
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channel 3.
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type: boolean
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vdd-supply: true
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patternProperties:
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"^channel@[0-4]$":
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description: |
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Represents the temperature channels.
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0: Internal sensor
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1-4: External remote diodes
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type: object
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properties:
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reg:
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maxItems: 1
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label:
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description: Unique name to identify which channel this is.
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required:
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- reg
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additionalProperties: false
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required:
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- compatible
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- reg
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- vdd-supply
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allOf:
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# EMC1812: 1 Internal, 1 External Channels, No APD,
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# parasitic-res-on-channel1-2: for channel 1
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- if:
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properties:
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compatible:
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const: microchip,emc1812
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then:
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properties:
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microchip,enable-anti-parallel: false
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microchip,parasitic-res-on-channel3-4: false
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patternProperties:
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"^channel@[2-4]$": false
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# EMC1813: 1 Internal, 2 External Channels, No APD,
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# parasitic-res-on-channel1-2: on both channel 1 & 2
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- if:
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properties:
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compatible:
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const: microchip,emc1813
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then:
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properties:
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microchip,enable-anti-parallel: false
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microchip,parasitic-res-on-channel3-4: false
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patternProperties:
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"^channel@[3-4]$": false
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# EMC1833: 1 Internal, 2 External Channels, Supports APD,
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# parasitic-res-on-channel1-2: on both channel 1 & 2
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- if:
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properties:
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compatible:
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const: microchip,emc1833
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then:
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properties:
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microchip,parasitic-res-on-channel3-4: false
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patternProperties:
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"^channel@[3-4]$": false
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# EMC1814: 1 Internal, 3 External Channels, Supports APD,
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# parasitic-res-on-channel1-2: on both channel 1 & 2
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# parasitic-res-on-channel3-4: for channel 3
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- if:
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properties:
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compatible:
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const: microchip,emc1814
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then:
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properties:
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channel@4: false
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unevaluatedProperties: false
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examples:
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- |
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i2c {
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#address-cells = <1>;
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#size-cells = <0>;
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temperature-sensor@4c {
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compatible = "microchip,emc1813";
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reg = <0x4c>;
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#address-cells = <1>;
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#size-cells = <0>;
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microchip,parasitic-res-on-channel1-2;
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vdd-supply = <&vdd>;
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channel@1 {
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reg = <1>;
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label = "External CH1 Temperature";
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};
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channel@2 {
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reg = <2>;
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label = "External CH2 Temperature";
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};
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};
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};
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@ -17397,6 +17397,12 @@ S: Supported
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F: Documentation/devicetree/bindings/interrupt-controller/microchip,sama7g5-eic.yaml
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F: drivers/irqchip/irq-mchp-eic.c
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MICROCHIP EMC1812 DRIVER
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M: Marius Cristea <marius.cristea@microchip.com>
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L: linux-hwmon@vger.kernel.org
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S: Supported
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F: Documentation/devicetree/bindings/hwmon/microchip,emc1812.yaml
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MICROCHIP I2C DRIVER
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M: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
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L: linux-i2c@vger.kernel.org
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