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Wed, 5 Aug 2026 03:18:09 -0400 From: Janani Sunil Date: Wed, 5 Aug 2026 09:17:42 +0200 Subject: [PATCH v8 2/3] dt-bindings: iio: dac: Add AD5529R Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Message-ID: <20260805-ad5529r-driver-v8-2-b41781f5632a@analog.com> References: <20260805-ad5529r-driver-v8-0-b41781f5632a@analog.com> In-Reply-To: <20260805-ad5529r-driver-v8-0-b41781f5632a@analog.com> To: Lars-Peter Clausen , Michael Hennerich , Jonathan Cameron , "David Lechner" , =?utf-8?q?Nuno_S=C3=A1?= , Andy Shevchenko , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Philipp Zabel , "Jonathan Corbet" , Shuah Khan , Mark Brown , Marius Cristea , "Marcus Folkesson" , Kent Gustavsson , Conor Dooley , Daire McNamara , Paul Walmsley , "Palmer Dabbelt" , Albert Ou , "Alexandre Ghiti" CC: , , , , Janani Sunil , , Kent Gustavsson , , Janani Sunil X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; 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Signed-off-by: Janani Sunil --- .../devicetree/bindings/iio/dac/adi,ad5529r.yaml | 254 +++++++++++++++++++++ MAINTAINERS | 7 + 2 files changed, 261 insertions(+) diff --git a/Documentation/devicetree/bindings/iio/dac/adi,ad5529r.yaml b/Documentation/devicetree/bindings/iio/dac/adi,ad5529r.yaml new file mode 100644 index 000000000000..9c390d460e5f --- /dev/null +++ b/Documentation/devicetree/bindings/iio/dac/adi,ad5529r.yaml @@ -0,0 +1,254 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/iio/dac/adi,ad5529r.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Analog Devices AD5529R 16-Channel 12/16-bit High Voltage DAC + +maintainers: + - Janani Sunil + +description: | + The AD5529R is a 16-channel, 12-bit or 16-bit, high voltage, buffered voltage + output digital-to-analog converter (DAC) with an integrated precision reference. + The device operates from unipolar and bipolar supplies. It is guaranteed + monotonic and has built-in rail-to-rail output buffers that can source or + sink up to 25mA. + + Specifications: + * 16 independent 12-bit or 16-bit DAC channels + * Independently programmable output ranges: 0V to 5V, 0V to 10V, 0V to 20V, + 0V to 40V, ±5V, ±10V, ±15V, and ±20V + * The device supports SPI communication with Mode 0 and Mode 3. + * 4.096V precision reference, 12ppm/°C maximum + * Built-in function generation: Toggle, Sinusoidal Dither, and Ramp waveforms + * Multiplexer for output voltage, load current sense and die temperature + + Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ad5529r.pdf + +properties: + compatible: + enum: + - adi,ad5529r-16 # 16-bit variant + - adi,ad5529r-12 # 12-bit variant + + reg: + maxItems: 1 + + spi-max-frequency: + maximum: 25000000 + description: + Maximum SPI frequency. The device supports SPI Mode 0 and Mode 3. + Read operations are limited to 25MHz maximum. + + reset-gpios: + maxItems: 1 + description: + GPIO connected to the RESET pin. Active low. When asserted low, + performs a power-on reset and initializes the device to its default state. + + clear-gpios: + maxItems: 1 + description: + GPIO connected to the CLEAR pin. Active low. When asserted low, + clears all DAC data registers without affecting configuration settings. + + interrupts: + maxItems: 1 + description: + Interrupt connected to the ALARM pin. Active low interrupt output + for overtemperature conditions, SPI CRC errors, and function completion. + + pwms: + minItems: 1 + maxItems: 4 + description: + PWM signals connected to the TG0-TG3 toggle pins. Pulsing these pins + based on trigger edge settings allows selected DACs to be updated + synchronously for digital function generation. + + pwm-names: + minItems: 1 + maxItems: 4 + items: + enum: [ tg0, tg1, tg2, tg3 ] + + io-channels: + maxItems: 1 + description: + ADC channel connected to the MUXOUT pin for monitoring output voltage, + load current sense, and die temperature. + + io-channel-names: + const: muxout + + vdd-io-supply: + description: Digital power supply (1.08V to 1.98V) + + vdd-5v-supply: + description: Analog power supply (4.75V to 5.25V) + + vdd-hv0-supply: + description: + High voltage positive supply (7V to 45V) for channels 0 to 3. + + vdd-hv1-supply: + description: + High voltage positive supply (7V to 45V) for channels 4 to 7. + + vdd-hv2-supply: + description: + High voltage positive supply (7V to 45V) for channels 8 to 11. + + vdd-hv3-supply: + description: + High voltage positive supply (7V to 45V) for channels 12 to 15. + + vss-hv0-supply: + description: + High voltage negative supply (-22.5V to 0V) for channels 0 to 3. + + vss-hv1-supply: + description: + High voltage negative supply (-22.5V to 0V) for channels 4 to 7. + + vss-hv2-supply: + description: + High voltage negative supply (-22.5V to 0V) for channels 8 to 11. + + vss-hv3-supply: + description: + High voltage negative supply (-22.5V to 0V) for channels 12 to 15. + + vref-supply: + description: + External voltage reference supply (4.056V to 4.136V, typically 4.096V). + When specified, the device uses external reference mode and the VREF pin + becomes an input. The device uses the internal 4.096V precision reference + otherwise. + + spi-device-addr: + minItems: 1 + maxItems: 4 + items: + enum: [0, 1, 2, 3] + default: 0 + description: + Hardware address of each device, selected by the ID0 and ID1 pins. + Up to four AD5529R devices can share a single SPI chip select. + + "#address-cells": + const: 1 + + "#size-cells": + const: 0 + +patternProperties: + "^channel@([0-9a-f]{1,2})$": + $ref: dac.yaml + type: object + description: Child nodes for individual channel configuration + + properties: + reg: + description: + Flattened channel number across all AD5529R devices sharing the chip + select. Within each 16-channel block, the physical channel number is reg % 16. + minimum: 0 + maximum: 63 + + output-range-microvolt: + description: + Output voltage range for this channel as [min, max] in + microvolts. + oneOf: + - items: + - const: 0 + default: 0 + - enum: [5000000, 10000000, 20000000, 40000000] + default: 5000000 + - items: + - const: -5000000 + - const: 5000000 + - items: + - const: -10000000 + - const: 10000000 + - items: + - const: -15000000 + - const: 15000000 + - items: + - const: -20000000 + - const: 20000000 + + required: + - reg + + additionalProperties: false + +required: + - compatible + - reg + - vdd-io-supply + - vdd-5v-supply + - vdd-hv0-supply + - vdd-hv1-supply + - vdd-hv2-supply + - vdd-hv3-supply + +dependencies: + spi-cpha: [ spi-cpol ] + spi-cpol: [ spi-cpha ] + +allOf: + - $ref: /schemas/spi/spi-peripheral-props.yaml# + +unevaluatedProperties: false + +examples: + - | + #include + + spi { + #address-cells = <1>; + #size-cells = <0>; + + dac@0 { + compatible = "adi,ad5529r-16"; + reg = <0>; + spi-max-frequency = <25000000>; + spi-device-addr = <0>; + + vdd-io-supply = <&vdd_io_regulator>; + vdd-5v-supply = <&vdd_5v_regulator>; + vdd-hv0-supply = <&vdd_hv0_regulator>; + vdd-hv1-supply = <&vdd_hv1_regulator>; + vdd-hv2-supply = <&vdd_hv2_regulator>; + vdd-hv3-supply = <&vdd_hv3_regulator>; + vss-hv0-supply = <&vss_hv0_regulator>; + vss-hv1-supply = <&vss_hv1_regulator>; + vss-hv2-supply = <&vss_hv2_regulator>; + vss-hv3-supply = <&vss_hv3_regulator>; + + reset-gpios = <&gpio0 87 GPIO_ACTIVE_LOW>; + + #address-cells = <1>; + #size-cells = <0>; + + channel@0 { + reg = <0>; + output-range-microvolt = <0 5000000>; + }; + + channel@1 { + reg = <1>; + output-range-microvolt = <(-10000000) 10000000>; + }; + + channel@2 { + reg = <2>; + output-range-microvolt = <0 40000000>; + }; + }; + }; +... diff --git a/MAINTAINERS b/MAINTAINERS index d6c3c7d22403..320e84765ce6 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1507,6 +1507,13 @@ W: https://ez.analog.com/linux-software-drivers F: Documentation/devicetree/bindings/iio/adc/adi,ad4851.yaml F: drivers/iio/adc/ad4851.c +ANALOG DEVICES INC AD5529R DRIVER +M: Janani Sunil +L: linux-iio@vger.kernel.org +S: Supported +W: https://ez.analog.com/linux-software-drivers +F: Documentation/devicetree/bindings/iio/dac/adi,ad5529r.yaml + ANALOG DEVICES INC AD5706R DRIVER M: Alexis Czezar Torreno L: linux-iio@vger.kernel.org -- 2.43.0