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1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)2%YAML 1.23---4$id: http://devicetree.org/schemas/iio/adc/maxim,max34408.yaml#5$schema: http://devicetree.org/meta-schemas/core.yaml#6 7title: Maxim MAX34408/MAX34409 current monitors with overcurrent control8 9maintainers:10 - Ivan Mikhaylov <fr0st61te@gmail.com>11 12description: |13 The MAX34408/MAX34409 are two- and four-channel current monitors that are14 configured and monitored with a standard I2C/SMBus serial interface. Each15 unidirectional current sensor offers precision high-side operation with a16 low full-scale sense voltage. The devices automatically sequence through17 two or four channels and collect the current-sense samples and average them18 to reduce the effect of impulse noise. The raw ADC samples are compared to19 user-programmable digital thresholds to indicate overcurrent conditions.20 Overcurrent conditions trigger a hardware output to provide an immediate21 indication to shut down any necessary external circuitry.22 23 Specifications about the devices can be found at:24 https://www.analog.com/media/en/technical-documentation/data-sheets/MAX34408-MAX34409.pdf25 26properties:27 compatible:28 enum:29 - maxim,max3440830 - maxim,max3440931 32 "#address-cells":33 const: 134 35 "#size-cells":36 const: 037 38 reg:39 maxItems: 140 41 interrupts:42 maxItems: 143 44 powerdown-gpios:45 description:46 Shutdown Output. Open-drain output. This output transitions to high impedance47 when any of the digital comparator thresholds are exceeded as long as the ENA48 pin is high.49 maxItems: 150 51 powerdown-status-gpios:52 description:53 SHTDN Enable Input. CMOS digital input. Connect to GND to clear the latch and54 unconditionally deassert (force low) the SHTDN output and reset the shutdown55 delay. Connect to VDD to enable normal latch operation of the SHTDN output.56 maxItems: 157 58 vdd-supply: true59 60patternProperties:61 "^channel@[0-3]$":62 $ref: adc.yaml63 type: object64 description:65 Represents the internal channels of the ADC.66 67 properties:68 reg:69 items:70 - minimum: 071 maximum: 372 73 maxim,rsense-val-micro-ohms:74 description:75 Adjust the Rsense value to monitor higher or lower current levels for76 input.77 enum: [250, 500, 1000, 5000, 10000, 50000, 100000, 200000, 500000]78 default: 100079 80 required:81 - reg82 - maxim,rsense-val-micro-ohms83 84 unevaluatedProperties: false85 86required:87 - compatible88 - reg89 90allOf:91 - if:92 properties:93 compatible:94 contains:95 const: maxim,max3440896 then:97 patternProperties:98 "^channel@[2-3]$": false99 "^channel@[0-1]$":100 properties:101 reg:102 maximum: 1103 else:104 patternProperties:105 "^channel@[0-3]$":106 properties:107 reg:108 maximum: 3109 110additionalProperties: false111 112examples:113 - |114 #include <dt-bindings/gpio/gpio.h>115 116 i2c {117 #address-cells = <1>;118 #size-cells = <0>;119 120 adc@1e {121 compatible = "maxim,max34409";122 reg = <0x1e>;123 powerdown-gpios = <&gpio0 1 GPIO_ACTIVE_LOW>;124 powerdown-status-gpios = <&gpio0 2 GPIO_ACTIVE_HIGH>;125 126 #address-cells = <1>;127 #size-cells = <0>;128 129 channel@0 {130 reg = <0x0>;131 maxim,rsense-val-micro-ohms = <5000>;132 };133 134 channel@1 {135 reg = <0x1>;136 maxim,rsense-val-micro-ohms = <10000>;137 };138 };139 };140