AD7191 is a pin-programmable, ultralow noise 24-bit sigma-delta ADC designed for precision bridge sensor measurements. It features two differential analog input channels, selectable output rates, programmable gain, internal temperature sensor and simultaneous 50Hz/60Hz rejection. Signed-off-by: Alisa-Dariana Roman <alisa.roman@xxxxxxxxxx> --- .../bindings/iio/adc/adi,ad7191.yaml | 128 ++++++++++++++++++ MAINTAINERS | 7 + 2 files changed, 135 insertions(+) create mode 100644 Documentation/devicetree/bindings/iio/adc/adi,ad7191.yaml diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7191.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad7191.yaml new file mode 100644 index 000000000000..f3e596918c22 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7191.yaml @@ -0,0 +1,128 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +# Copyright 2025 Analog Devices Inc. +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/iio/adc/adi,ad7191.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Analog Devices AD7191 ADC device driver + +maintainers: + - Alisa-Dariana Roman <alisa.roman@xxxxxxxxxx> + +description: | + Bindings for the Analog Devices AD7191 ADC device. Datasheet can be + found here: + https://www.analog.com/media/en/technical-documentation/data-sheets/AD7191.pdf + +properties: + compatible: + enum: + - adi,ad7191 + + reg: + maxItems: 1 + + spi-cpol: true + + spi-cpha: true + + clocks: + maxItems: 1 + description: + Optionally, either a crystal can be attached externally between MCLK1 and + MCLK2 pins, or an external CMOS-compatible clock can drive the MCLK2 + pin. If absent, internal 4.92MHz clock is used. + + interrupts: + maxItems: 1 + + avdd-supply: + description: AVdd voltage supply + + dvdd-supply: + description: DVdd voltage supply + + vref-supply: + description: Vref voltage supply + + odr1-gpios: + description: GPIO connected to ODR1 pin for output data rate selection + maxItems: 1 + + odr2-gpios: + description: GPIO connected to ODR2 pin for output data rate selection + maxItems: 1 + + pga1-gpios: + description: GPIO connected to PGA1 pin for gain selection + maxItems: 1 + + pga2-gpios: + description: GPIO connected to PGA2 pin for gain selection + maxItems: 1 + + temp-gpios: + description: GPIO connected to TEMP pin for temperature sensor enable + maxItems: 1 + + chan-gpios: + description: GPIO connected to CHAN pin for input channel selection + maxItems: 1 + + clksel-gpios: + description: GPIO connected to CLKSEL pin for clock source selection + maxItems: 1 + +required: + - compatible + - reg + - interrupts + - avdd-supply + - dvdd-supply + - vref-supply + - spi-cpol + - spi-cpha + - odr1-gpios + - odr2-gpios + - pga1-gpios + - pga2-gpios + - temp-gpios + - chan-gpios + - clksel-gpios + +allOf: + - $ref: /schemas/spi/spi-peripheral-props.yaml# + +unevaluatedProperties: false + +examples: + - | + #include <dt-bindings/gpio/gpio.h> + #include <dt-bindings/interrupt-controller/irq.h> + + spi0 { + #address-cells = <1>; + #size-cells = <0>; + + adc@0 { + compatible = "adi,ad7191"; + reg = <0>; + spi-max-frequency = <1000000>; + spi-cpol; + spi-cpha; + clocks = <&ad7191_mclk>; + interrupts = <25 IRQ_TYPE_EDGE_FALLING>; + interrupt-parent = <&gpio>; + avdd-supply = <&avdd>; + dvdd-supply = <&dvdd>; + vref-supply = <&vref>; + odr1-gpios = <&gpio 23 GPIO_ACTIVE_HIGH>; + odr2-gpios = <&gpio 24 GPIO_ACTIVE_HIGH>; + pga1-gpios = <&gpio 5 GPIO_ACTIVE_HIGH>; + pga2-gpios = <&gpio 6 GPIO_ACTIVE_HIGH>; + temp-gpios = <&gpio 22 GPIO_ACTIVE_HIGH>; + chan-gpios = <&gpio 27 GPIO_ACTIVE_HIGH>; + clksel-gpios = <&gpio 13 GPIO_ACTIVE_HIGH>; + }; + }; diff --git a/MAINTAINERS b/MAINTAINERS index 8e5167443cea..254fbfe6144f 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1302,6 +1302,13 @@ W: http://ez.analog.com/community/linux-device-drivers F: Documentation/devicetree/bindings/iio/adc/adi,ad7091r* F: drivers/iio/adc/ad7091r* +ANALOG DEVICES INC AD7191 DRIVER +M: Alisa-Dariana Roman <alisa.roman@xxxxxxxxxx> +L: linux-iio@xxxxxxxxxxxxxxx +S: Supported +W: https://ez.analog.com/linux-software-drivers +F: Documentation/devicetree/bindings/iio/adc/adi,ad7191.yaml + ANALOG DEVICES INC AD7192 DRIVER M: Alisa-Dariana Roman <alisa.roman@xxxxxxxxxx> L: linux-iio@xxxxxxxxxxxxxxx -- 2.43.0
