atmel,sama9260-adc.yaml

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    1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
    2 %YAML 1.2
    3 ---
    4 $id: http://devicetree.org/schemas/iio/adc/atmel,sama9260-adc.yaml#
    5 $schema: http://devicetree.org/meta-schemas/core.yaml#
    6 
    7 title: AT91 sama9260 and similar Analog to Digital Converter (ADC)
    8 
    9 maintainers:
   10   - Alexandre Belloni <alexandre.belloni@bootlin.com>
   11 
   12 properties:
   13   compatible:
   14     enum:
   15       - atmel,at91sam9260-adc
   16       - atmel,at91sam9rl-adc
   17       - atmel,at91sam9g45-adc
   18       - atmel,at91sam9x5-adc
   19       - atmel,at91sama5d3-adc
   20 
   21   reg:
   22     maxItems: 1
   23 
   24   interrupts:
   25     maxItems: 1
   26 
   27   clocks:
   28     minItems: 2
   29     maxItems: 2
   30 
   31   clock-names:
   32     items:
   33       - const: adc_clk
   34       - const: adc_op_clk
   35 
   36   atmel,adc-channels-used:
   37     $ref: /schemas/types.yaml#/definitions/uint32
   38     description: Bitmask of the channels muxed and enabled for this device
   39 
   40   atmel,adc-startup-time:
   41     $ref: /schemas/types.yaml#/definitions/uint32
   42     description:
   43       Startup Time of the ADC in microseconds as defined in the datasheet
   44 
   45   atmel,adc-vref:
   46     $ref: /schemas/types.yaml#/definitions/uint32
   47     description: Reference voltage in millivolts for the conversions
   48 
   49   atmel,adc-use-external-triggers:
   50     $ref: /schemas/types.yaml#/definitions/flag
   51     description: Enable the external triggers
   52 
   53   atmel,adc-use-res:
   54     $ref: /schemas/types.yaml#/definitions/string
   55     description:
   56       String corresponding to an identifier from atmel,adc-res-names property.
   57       If not specified, the highest resolution will be used.
   58     enum:
   59       - "lowres"
   60       - "highres"
   61 
   62   atmel,adc-sleep-mode:
   63     $ref: /schemas/types.yaml#/definitions/flag
   64     description: Enable sleep mode when no conversion
   65 
   66   atmel,adc-sample-hold-time:
   67     $ref: /schemas/types.yaml#/definitions/uint32
   68     description: Sample and Hold Time in microseconds
   69 
   70   atmel,adc-ts-wires:
   71     $ref: /schemas/types.yaml#/definitions/uint32
   72     description: |
   73       Number of touchscreen wires. Must be set to enable touchscreen.
   74       NOTE: when adc touchscreen is enabled, the adc hardware trigger will be
   75       disabled. Since touchscreen will occupy the trigger register.
   76     enum:
   77       - 4
   78       - 5
   79 
   80   atmel,adc-ts-pressure-threshold:
   81     $ref: /schemas/types.yaml#/definitions/uint32
   82     description:
   83       Pressure threshold for touchscreen.
   84 
   85   "#io-channel-cells":
   86     const: 1
   87 
   88 additionalProperties: false
   89 
   90 required:
   91   - compatible
   92   - reg
   93   - interrupts
   94   - clocks
   95   - clock-names
   96   - atmel,adc-channels-used
   97   - atmel,adc-startup-time
   98   - atmel,adc-vref
   99 
  100 examples:
  101   - |
  102     #include <dt-bindings/dma/at91.h>
  103     #include <dt-bindings/interrupt-controller/irq.h>
  104     soc {
  105         #address-cells = <1>;
  106         #size-cells = <1>;
  107 
  108         adc@fffb0000 {
  109             compatible = "atmel,at91sam9260-adc";
  110             reg = <0xfffb0000 0x100>;
  111             interrupts = <20 IRQ_TYPE_LEVEL_HIGH 0>;
  112             clocks = <&adc_clk>, <&adc_op_clk>;
  113             clock-names = "adc_clk", "adc_op_clk";
  114             atmel,adc-channels-used = <0xff>;
  115             atmel,adc-startup-time = <40>;
  116             atmel,adc-use-external-triggers;
  117             atmel,adc-vref = <3300>;
  118             atmel,adc-use-res = "lowres";
  119         };
  120     };
  121 ...

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