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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/Documentation/devicetree/bindings/iio/dac/st,stm32-dac.yaml
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# SPDX-License-Identifier: (GPL-2.0 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/st,stm32-dac.yaml#

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$schema: http://devicetree.org/meta-schemas/core.yaml#

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title: STMicroelectronics STM32 DAC

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description: |

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  The STM32 DAC is a 12-bit voltage output digital-to-analog converter. The DAC

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  may be configured in 8 or 12-bit mode. It has two output channels, each with

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  its own converter.

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  It has built-in noise and triangle waveform generator and supports external

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  triggers for conversions. The DAC's output buffer allows a high drive output

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  current.

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maintainers:

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  - Fabrice Gasnier <fabrice.gasnier@foss.st.com>

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properties:

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  compatible:

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    enum:

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      - st,stm32f4-dac-core

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      - st,stm32h7-dac-core

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  reg:

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    maxItems: 1

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  resets:

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    maxItems: 1

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  clocks:

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    maxItems: 1

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  clock-names:

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    items:

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      - const: pclk

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  vref-supply:

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    description: Phandle to the vref input analog reference voltage.

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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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  access-controllers:

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    minItems: 1

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    maxItems: 2

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additionalProperties: false

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required:

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  - compatible

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  - reg

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  - clocks

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  - clock-names

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  - vref-supply

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  - '#address-cells'

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  - '#size-cells'

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patternProperties:

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  "^dac@[1-2]+$":

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    type: object

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    description:

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      A DAC block node should contain at least one subnode, representing an

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      DAC instance/channel available on the machine.

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    properties:

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      compatible:

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        const: st,stm32-dac

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      reg:

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        description: Must be either 1 or 2, to define (single) channel in use

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        enum: [1, 2]

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      '#io-channel-cells':

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        const: 1

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    additionalProperties: false

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    required:

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      - compatible

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      - reg

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      - '#io-channel-cells'

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examples:

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  - |

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    // Example on stm32mp157c

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    #include <dt-bindings/clock/stm32mp1-clks.h>

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    dac: dac@40017000 {

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      compatible = "st,stm32h7-dac-core";

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      reg = <0x40017000 0x400>;

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      clocks = <&rcc DAC12>;

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      clock-names = "pclk";

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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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      dac@1 {

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        compatible = "st,stm32-dac";

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        #io-channel-cells = <1>;

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        reg = <1>;

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      };

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      dac@2 {

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        compatible = "st,stm32-dac";

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        #io-channel-cells = <1>;

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        reg = <2>;

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      };

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    };

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...

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