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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/Documentation/devicetree/bindings/iio/adc/atmel,sama9260-adc.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/adc/atmel,sama9260-adc.yaml#

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

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title: AT91 sama9260 and similar Analog to Digital Converter (ADC)

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maintainers:

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  - Alexandre Belloni <alexandre.belloni@bootlin.com>

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properties:

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  compatible:

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    enum:

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      - atmel,at91sam9260-adc

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      - atmel,at91sam9rl-adc

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      - atmel,at91sam9g45-adc

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      - atmel,at91sam9x5-adc

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      - atmel,at91sama5d3-adc

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  reg:

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    maxItems: 1

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  interrupts:

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    maxItems: 1

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  clocks:

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    minItems: 2

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    maxItems: 2

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  clock-names:

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    items:

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      - const: adc_clk

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      - const: adc_op_clk

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  atmel,adc-channels-used:

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    $ref: /schemas/types.yaml#/definitions/uint32

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    description: Bitmask of the channels muxed and enabled for this device

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  atmel,adc-startup-time:

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    $ref: /schemas/types.yaml#/definitions/uint32

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    description:

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      Startup Time of the ADC in microseconds as defined in the datasheet

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  atmel,adc-vref:

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    $ref: /schemas/types.yaml#/definitions/uint32

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    description: Reference voltage in millivolts for the conversions

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  atmel,adc-use-external-triggers:

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    $ref: /schemas/types.yaml#/definitions/flag

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    description: Enable the external triggers

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  atmel,adc-use-res:

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    $ref: /schemas/types.yaml#/definitions/string

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    description:

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      String corresponding to an identifier from atmel,adc-res-names property.

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      If not specified, the highest resolution will be used.

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    enum:

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      - lowres

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      - highres

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  atmel,adc-sleep-mode:

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    $ref: /schemas/types.yaml#/definitions/flag

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    description: Enable sleep mode when no conversion

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  atmel,adc-sample-hold-time:

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    $ref: /schemas/types.yaml#/definitions/uint32

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    description: Sample and Hold Time in microseconds

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  atmel,adc-ts-wires:

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    $ref: /schemas/types.yaml#/definitions/uint32

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    description: |

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      Number of touchscreen wires. Must be set to enable touchscreen.

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      NOTE: when adc touchscreen is enabled, the adc hardware trigger will be

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      disabled. Since touchscreen will occupy the trigger register.

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    enum:

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      - 4

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      - 5

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  atmel,adc-ts-pressure-threshold:

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    $ref: /schemas/types.yaml#/definitions/uint32

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    description:

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      Pressure threshold for touchscreen.

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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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  - interrupts

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  - clocks

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  - clock-names

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  - atmel,adc-channels-used

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  - atmel,adc-startup-time

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  - atmel,adc-vref

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examples:

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  - |

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    #include <dt-bindings/dma/at91.h>

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    #include <dt-bindings/interrupt-controller/irq.h>

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    soc {

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        #address-cells = <1>;

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        #size-cells = <1>;

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        adc@fffb0000 {

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            compatible = "atmel,at91sam9260-adc";

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            reg = <0xfffb0000 0x100>;

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            interrupts = <20 IRQ_TYPE_LEVEL_HIGH 0>;

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            clocks = <&adc_clk>, <&adc_op_clk>;

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            clock-names = "adc_clk", "adc_op_clk";

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            atmel,adc-channels-used = <0xff>;

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            atmel,adc-startup-time = <40>;

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            atmel,adc-use-external-triggers;

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            atmel,adc-vref = <3300>;

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            atmel,adc-use-res = "lowres";

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        };

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    };

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...

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