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The ROHM BD79700, BD79701 and BD79702 are subsets of the BD79703 DAC. The main difference is the number of the channels. BD79703 has 6 channels. The BD79702 has 4, BD79701 3 and BD79700 2 channels. Additionally, the BD79700 and BD79701 do not have separate Vfs pin but use the Vcc also for the full-scale voltage. Add properties for the BD79700, BD79701 and BD79702. Signed-off-by: Matti Vaittinen <mazziesaccount@gmail.com> Acked-by: Conor Dooley <conor.dooley@microchip.com> Link: https://patch.msgid.link/0a114565e4de52bf8f98c4f9d17943e5148b0112.1743576022.git.mazziesaccount@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
82 lines
1.9 KiB
YAML
82 lines
1.9 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
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# Copyright 2024 ROHM Semiconductor.
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/iio/dac/rohm,bd79703.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: ROHM BD79700, BD79701, BD79702 and BD79703 DACs
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maintainers:
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- Matti Vaittinen <mazziesaccount@gmail.com>
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description: |
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The ROHM BD7970[0,1,2,3] are 8-bit DACs. The BD79700 has 2 channels,
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BD79701 3 channels, BD79702 4 channels and BD79703 has 6 channels.
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Datasheets for BD79702 and BD79703 can be found from
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https://fscdn.rohm.com/en/products/databook/datasheet/ic/data_converter/dac/bd79702fv-lb_bd79703fv-lb-e.pdf
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and for the BD79700 and the BD79701 from
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https://fscdn.rohm.com/en/products/databook/datasheet/ic/data_converter/dac/bd79700fvm-lb_bd79701fvm-lb-e.pdf
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properties:
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compatible:
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enum:
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- rohm,bd79700
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- rohm,bd79701
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- rohm,bd79702
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- rohm,bd79703
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reg:
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maxItems: 1
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spi-max-frequency:
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maximum: 30000000
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vfs-supply:
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description:
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The regulator to use as a full scale voltage. The voltage should be
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between 2.7V .. VCC. Not present on BD79700 and BD79701.
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vcc-supply:
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description:
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The regulator supplying the operating voltage. Should be between
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2.7V ... 5.5V. Is used also as a Vfs on BD79700 and BD79701.
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required:
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- compatible
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- reg
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- spi-max-frequency
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- vcc-supply
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if:
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properties:
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compatible:
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contains:
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enum:
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- rohm,bd79702
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- rohm,bd79703
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then:
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required:
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- vfs-supply
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allOf:
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- $ref: /schemas/spi/spi-peripheral-props.yaml#
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unevaluatedProperties: 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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dac@0 {
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compatible = "rohm,bd79703";
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reg = <0>;
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spi-max-frequency = <30000000>;
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vcc-supply = <&vcc>;
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vfs-supply = <&vref>;
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};
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};
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...
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