1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 2%YAML 1.2 3--- 4$id: http://devicetree.org/schemas/iio/amplifiers/adi,hmc425a.yaml# 5$schema: http://devicetree.org/meta-schemas/core.yaml# 6 7title: Analog Devices HMC425A and similar Digital Step Attenuators 8 9maintainers: 10 - Michael Hennerich <michael.hennerich@analog.com> 11 12description: | 13 Digital Step Attenuator IIO devices with gpio interface. 14 Offer various frequency and attenuation ranges. 15 ADRF5750 2 dB LSB, 4-Bit, Silicon Digital Attenuator, 10 MHz to 60 GHz 16 https://www.analog.com/media/en/technical-documentation/data-sheets/adrf5740.pdf 17 18 HMC425A 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, 2.2 - 8.0 GHz 19 https://www.analog.com/media/en/technical-documentation/data-sheets/hmc425A.pdf 20 21 HMC540S 1 dB LSB Silicon MMIC 4-Bit Digital Positive Control Attenuator, 0.1 - 8 GHz 22 https://www.analog.com/media/en/technical-documentation/data-sheets/hmc540s.pdf 23 24 25properties: 26 compatible: 27 enum: 28 - adi,adrf5740 29 - adi,hmc425a 30 - adi,hmc540s 31 32 vcc-supply: true 33 34 ctrl-gpios: 35 description: 36 Must contain an array of 6 GPIO specifiers, referring to the GPIO pins 37 connected to the control pins V1-V6. 38 minItems: 6 39 maxItems: 6 40 41required: 42 - compatible 43 - ctrl-gpios 44 45additionalProperties: false 46 47examples: 48 - | 49 #include <dt-bindings/gpio/gpio.h> 50 gpio_hmc425a: hmc425a { 51 compatible = "adi,hmc425a"; 52 ctrl-gpios = <&gpio 40 GPIO_ACTIVE_HIGH>, 53 <&gpio 39 GPIO_ACTIVE_HIGH>, 54 <&gpio 38 GPIO_ACTIVE_HIGH>, 55 <&gpio 37 GPIO_ACTIVE_HIGH>, 56 <&gpio 36 GPIO_ACTIVE_HIGH>, 57 <&gpio 35 GPIO_ACTIVE_HIGH>; 58 vcc-supply = <&foo>; 59 }; 60... 61