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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