xref: /linux/Documentation/devicetree/bindings/iio/adc/atmel,sama9260-adc.yaml (revision be239684b18e1cdcafcf8c7face4a2f562c745ad) 
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
7title: AT91 sama9260 and similar Analog to Digital Converter (ADC)
8
9maintainers:
10  - Alexandre Belloni <alexandre.belloni@bootlin.com>
11
12properties:
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
88additionalProperties: false
89
90required:
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
100examples:
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...
122