Add a driver for generic serial shift register DACs like TI DAC714. Signed-off-by: Mike Looijmans <mike.looijmans@xxxxxxxx> --- .../devicetree/bindings/iio/dac/spidac.yaml | 69 +++++++++++++++++++ 1 file changed, 69 insertions(+) create mode 100644 Documentation/devicetree/bindings/iio/dac/spidac.yaml diff --git a/Documentation/devicetree/bindings/iio/dac/spidac.yaml b/Documentation/devicetree/bindings/iio/dac/spidac.yaml new file mode 100644 index 000000000000..be98da728594 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/dac/spidac.yaml @@ -0,0 +1,69 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/iio/dac/spidac.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Generic "shift register" SPI DAC + +description: + Supports simple SPI "shift register" DACs, like TI's DAC714. These DACs have + no control registers or commands, they just use a clock and serial data to + shift in a raw DAC value. Multiple DACs can be daisy-chained together. + +maintainers: + - Mike Looijmans <mike.looijmans@xxxxxxxx> + +properties: + compatible: + enum: + - spi-dac + - ti,dac714 + + reg: + maxItems: 1 + + ldac-gpios: + description: + LDAC pin to be used as a hardware trigger to update the DAC outputs. Not + needed when the DACs use the chip select to update their output. + maxItems: 1 + + reset-gpios: + description: + Optional reset pin that resets all DACs. + maxItems: 1 + + num-channels: + description: + Number of channels (usually the number of DAC chips in series) + $ref: /schemas/types.yaml#/definitions/uint32 + + bits-per-channel: + description: + Number of bits for each DAC output. + $ref: /schemas/types.yaml#/definitions/uint32 + +required: + - compatible + - reg + +allOf: + - $ref: /schemas/spi/spi-peripheral-props.yaml# + +unevaluatedProperties: false + +examples: + - | + #include <dt-bindings/gpio/gpio.h> + spi { + #address-cells = <1>; + #size-cells = <0>; + + dac@1 { + compatible = "spidac"; + reg = <0x1>; + ldac-gpios = <&gpio 42 GPIO_ACTIVE_LOW>; + }; + }; +... -- 2.34.1 Met vriendelijke groet / kind regards, Mike Looijmans System Expert TOPIC Embedded Products B.V. Materiaalweg 4, 5681 RJ Best The Netherlands T: +31 (0) 499 33 69 69 E: mike.looijmans@xxxxxxxx W: www.topic.nl Please consider the environment before printing this e-mail
