148 lines
3.6 KiB
YAML
148 lines
3.6 KiB
YAML
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/iio/dac/adi,ltc2688.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Analog Devices LTC2688 DAC
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maintainers:
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- Nuno Sá <nuno.sa@analog.com>
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description: |
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Analog Devices LTC2688 16 channel, 16 bit, +-15V DAC
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https://www.analog.com/media/en/technical-documentation/data-sheets/ltc2688.pdf
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properties:
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compatible:
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enum:
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- adi,ltc2688
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reg:
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maxItems: 1
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vcc-supply:
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description: Analog Supply Voltage Input.
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iovcc-supply:
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description: Digital Input/Output Supply Voltage.
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vref-supply:
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description:
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Reference Input/Output. The voltage at the REF pin sets the full-scale
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range of all channels. If not provided the internal reference is used and
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also provided on the VREF pin".
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clr-gpios:
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description:
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If specified, it will be asserted during driver probe. As the line is
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active low, it should be marked GPIO_ACTIVE_LOW.
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maxItems: 1
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'#address-cells':
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const: 1
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'#size-cells':
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const: 0
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patternProperties:
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"^channel@([0-9]|1[0-5])$":
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type: object
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additionalProperties: false
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properties:
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reg:
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description: The channel number representing the DAC output channel.
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maximum: 15
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adi,toggle-mode:
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description:
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Set the channel as a toggle enabled channel. Toggle operation enables
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fast switching of a DAC output between two different DAC codes without
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any SPI transaction.
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type: boolean
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adi,output-range-microvolt:
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description: Specify the channel output full scale range.
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oneOf:
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- items:
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- const: 0
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- enum: [5000000, 10000000]
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- items:
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- const: -5000000
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- const: 5000000
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- items:
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- const: -10000000
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- const: 10000000
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- items:
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- const: -15000000
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- const: 15000000
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adi,overrange:
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description: Enable 5% overrange over the selected full scale range.
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type: boolean
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clocks:
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maxItems: 1
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adi,toggle-dither-input:
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description:
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Selects the TGPx pin to be associated with this channel. This setting
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only makes sense for toggle or dither enabled channels. If
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@adi,toggle-mode is not set and this property is given, the channel is
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assumed to be a dither capable channel. Note that multiple channels
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can be mapped to the same pin. If this setting is given, the
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respective @clock must also be provided. Mappings between this and
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input pins
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0 - TGP1
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1 - TGP2
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2 - TGP3
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$ref: /schemas/types.yaml#/definitions/uint32
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enum: [0, 1, 2]
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dependencies:
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adi,toggle-dither-input: [ clocks ]
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required:
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- reg
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required:
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- compatible
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- reg
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additionalProperties: false
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examples:
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- |
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spi {
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#address-cells = <1>;
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#size-cells = <0>;
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ltc2688: ltc2688@0 {
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compatible = "adi,ltc2688";
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reg = <0>;
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vcc-supply = <&vcc>;
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iovcc-supply = <&vcc>;
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vref-supply = <&vref>;
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#address-cells = <1>;
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#size-cells = <0>;
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channel@0 {
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reg = <0>;
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adi,toggle-mode;
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adi,overrange;
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};
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channel@1 {
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reg = <1>;
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adi,output-range-microvolt = <0 10000000>;
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clocks = <&clock_tgp3>;
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adi,toggle-dither-input = <2>;
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};
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};
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};
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...
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