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Documentation / devicetree / bindings / arm / atmel-adc.txt




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Based on kernel version 3.9. Page generated on 2013-05-02 22:56 EST.

1	* AT91's Analog to Digital Converter (ADC)
2	
3	Required properties:
4	  - compatible: Should be "atmel,at91sam9260-adc"
5	  - reg: Should contain ADC registers location and length
6	  - interrupts: Should contain the IRQ line for the ADC
7	  - atmel,adc-channel-base: Offset of the first channel data register
8	  - atmel,adc-channels-used: Bitmask of the channels muxed and enable for this
9	    device
10	  - atmel,adc-drdy-mask: Mask of the DRDY interruption in the ADC
11	  - atmel,adc-num-channels: Number of channels available in the ADC
12	  - atmel,adc-startup-time: Startup Time of the ADC in microseconds as
13	    defined in the datasheet
14	  - atmel,adc-status-register: Offset of the Interrupt Status Register
15	  - atmel,adc-trigger-register: Offset of the Trigger Register
16	  - atmel,adc-vref: Reference voltage in millivolts for the conversions
17	
18	Optional properties:
19	  - atmel,adc-use-external: Boolean to enable of external triggers
20	 
21	Optional trigger Nodes:
22	  - Required properties:
23	    * trigger-name: Name of the trigger exposed to the user
24	    * trigger-value: Value to put in the Trigger register
25	      to activate this trigger
26	  - Optional properties:
27	    * trigger-external: Is the trigger an external trigger?
28	
29	Examples:
30	adc0: adc@fffb0000 {
31		compatible = "atmel,at91sam9260-adc";
32		reg = <0xfffb0000 0x100>;
33		interrupts = <20 4>;
34		atmel,adc-channel-base = <0x30>;
35		atmel,adc-channels-used = <0xff>;
36		atmel,adc-drdy-mask = <0x10000>;
37		atmel,adc-num-channels = <8>;
38		atmel,adc-startup-time = <40>;
39		atmel,adc-status-register = <0x1c>;
40		atmel,adc-trigger-register = <0x08>;
41		atmel,adc-use-external;
42		atmel,adc-vref = <3300>;
43	
44		trigger@0 {
45			trigger-name = "external-rising";
46			trigger-value = <0x1>;
47			trigger-external;
48		};
49		trigger@1 {
50			trigger-name = "external-falling";
51			trigger-value = <0x2>;
52			trigger-external;
53		};
54	
55		trigger@2 {
56			trigger-name = "external-any";
57			trigger-value = <0x3>;
58			trigger-external;
59		};
60	
61		trigger@3 {
62			trigger-name = "continuous";
63			trigger-value = <0x6>;
64		};
65	};
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