Document the LTC2688 devicetree properties. Signed-off-by: Nuno Sá <nuno.sa@xxxxxxxxxx> --- .../bindings/iio/dac/adi,ltc2688.yaml | 146 ++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 147 insertions(+) create mode 100644 Documentation/devicetree/bindings/iio/dac/adi,ltc2688.yaml diff --git a/Documentation/devicetree/bindings/iio/dac/adi,ltc2688.yaml b/Documentation/devicetree/bindings/iio/dac/adi,ltc2688.yaml new file mode 100644 index 000000000000..48f9e7d29423 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/dac/adi,ltc2688.yaml @@ -0,0 +1,146 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/iio/dac/adi,ltc2688.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Analog Devices LTC2688 DAC + +maintainers: + - Nuno Sá <nuno.sa@xxxxxxxxxx> + +description: | + Analog Devices LTC2688 16 channel, 16 bit, +-15V DAC + https://www.analog.com/media/en/technical-documentation/data-sheets/ltc2688.pdf + +properties: + compatible: + enum: + - adi,ltc2688 + + reg: + maxItems: 1 + + vcc-supply: + description: Analog Supply Voltage Input. + + iovcc-supply: + description: Digital Input/Output Supply Voltage. + + vref-supply: + description: + Reference Input/Output. The voltage at the REF pin sets the full-scale + range of all channels. If not provided the internal reference is used and + also provided on the VREF pin". + + clr-gpios: + description: + If specified, it will be asserted during driver probe. As the line is + active low, it should be marked GPIO_ACTIVE_LOW. + maxItems: 1 + + '#address-cells': + const: 1 + + '#size-cells': + const: 0 + +patternProperties: + "^channel@([0-9]|1[0-5])$": + type: object + + properties: + reg: + description: The channel number representing the DAC output channel. + maximum: 15 + + adi,toggle-mode: + description: + Set the channel as a toggle enabled channel. Toggle operation enables + fast switching of a DAC output between two different DAC codes without + any SPI transaction. + type: boolean + + adi,output-range-microvolt: + description: Specify the channel output full scale range. + oneOf: + - items: + - const: 0 + - enum: [5000000, 10000000] + - items: + - const: -5000000 + - const: 5000000 + - items: + - const: -10000000 + - const: 10000000 + - items: + - const: -15000000 + - const: 15000000 + + adi,overrange: + description: Enable 5% overrange over the selected full scale range. + type: boolean + + clocks: + maxItems: 1 + + adi,toggle-dither-input: + description: + Selects the TGPx pin to be associated with this channel. This setting + only makes sense for toggle or dither enabled channels. If + @adi,toggle-mode is not set and this property is given, the channel is + assumed to be a dither capable channel. Note that multiple channels + can be mapped to the same pin. If this setting is given, the + respective @clock must also be provided. Mappings between this and + input pins + 0 - TGP1 + 1 - TGP2 + 2 - TGP3 + $ref: /schemas/types.yaml#/definitions/uint32 + enum: [0, 1, 2] + + dependencies: + adi,toggle-dither-input: [ clocks ] + + required: + - reg + +required: + - compatible + - reg + +additionalProperties: false + +examples: + - | + + spi { + #address-cells = <1>; + #size-cells = <0>; + ltc2688: ltc2688@0 { + compatible = "adi,ltc2688"; + reg = <0>; + + vcc-supply = <&vcc>; + iovcc-supply = <&vcc>; + vref-supply = <&vref>; + + #address-cells = <1>; + #size-cells = <0>; + channel@0 { + reg = <0>; + adi,toggle-mode; + adi,overrange; + }; + + channel@1 { + reg = <1>; + adi,output-range-microvolt = <0 10000000>; + + clocks = <&clock_tgp3>; + adi,toggle-dither-input = <2>; + }; + }; + }; + +... diff --git a/MAINTAINERS b/MAINTAINERS index 1ce4bb5e460a..bc3f8dc8dca2 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -11196,6 +11196,7 @@ L: linux-iio@xxxxxxxxxxxxxxx S: Supported W: http://ez.analog.com/community/linux-device-drivers F: Documentation/ABI/testing/sysfs-bus-iio-dac-ltc2688 +F: Documentation/devicetree/bindings/iio/dac/adi,ltc2688.yaml F: drivers/iio/dac/ltc2688.c LTC2947 HARDWARE MONITOR DRIVER -- 2.34.1
