Add dt-bindings for ltc2991 octal i2c voltage, current and temperature monitor. Signed-off-by: Antoniu Miclaus <antoniu.miclaus@xxxxxxxxxx> --- changes in v3: - expand description for differential channels and temperature channels by mentioning the pin configuration that is set via these properties. - add `additionalProperties: false` for the channel properties - make `reg` required for channel properties - make `adi,temperature-enable` and `shunt-resistor-micro-ohms` mutually exclusive following the approach suggested in review. .../bindings/hwmon/adi,ltc2991.yaml | 128 ++++++++++++++++++ 1 file changed, 128 insertions(+) create mode 100644 Documentation/devicetree/bindings/hwmon/adi,ltc2991.yaml diff --git a/Documentation/devicetree/bindings/hwmon/adi,ltc2991.yaml b/Documentation/devicetree/bindings/hwmon/adi,ltc2991.yaml new file mode 100644 index 000000000000..011e5b65c79c --- /dev/null +++ b/Documentation/devicetree/bindings/hwmon/adi,ltc2991.yaml @@ -0,0 +1,128 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- + +$id: http://devicetree.org/schemas/hwmon/adi,ltc2991.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Analog Devices LTC2991 Octal I2C Voltage, Current and Temperature Monitor + +maintainers: + - Antoniu Miclaus <antoniu.miclaus@xxxxxxxxxx> + +description: | + The LTC2991 is used to monitor system temperatures, voltages and currents. + Through the I2C serial interface, the eight monitors can individually measure + supply voltages and can be paired for differential measurements of current + sense resistors or temperature sensing transistors. + + Datasheet: + https://www.analog.com/en/products/ltc2991.html + +properties: + compatible: + const: adi,ltc2991 + + reg: + maxItems: 1 + + '#address-cells': + const: 1 + + '#size-cells': + const: 0 + + vcc-supply: true + +patternProperties: + "^channel@[0-3]$": + type: object + description: + Represents the differential/temperature channels. + + properties: + reg: + description: + The channel number. LTC2991 can monitor 4 currents/temperatures. + items: + minimum: 0 + maximum: 3 + + shunt-resistor-micro-ohms: + description: + The value of curent sense resistor in micro ohms. Pin configuration is + set for differential input pair. + + adi,temperature-enable: + description: + Enables temperature readings. Pin configuration is set for remote + diode temperature measurement. + type: boolean + + required: + - reg + + allOf: + - if: + required: + - shunt-resistor-micro-ohms + then: + properties: + adi,temperature-enable: false + + additionalProperties: false + +required: + - compatible + - reg + - vcc-supply + +additionalProperties: false + +examples: + - | + i2c { + #address-cells = <1>; + #size-cells = <0>; + + hwmon@48 { + compatible = "adi,ltc2991"; + reg = <0x48>; + vcc-supply = <&vcc>; + }; + }; + - | + i2c { + #address-cells = <1>; + #size-cells = <0>; + + hwmon@48 { + #address-cells = <1>; + #size-cells = <0>; + + compatible = "adi,ltc2991"; + reg = <0x48>; + vcc-supply = <&vcc>; + + channel@0 { + reg = <0x0>; + shunt-resistor-micro-ohms = <100000>; + }; + + channel@1 { + reg = <0x1>; + shunt-resistor-micro-ohms = <100000>; + }; + + channel@2 { + reg = <0x2>; + adi,temperature-enable; + }; + + channel@3 { + reg = <0x3>; + adi,temperature-enable; + }; + }; + }; +... -- 2.42.0
