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-* AT91's Analog to Digital Converter (ADC)
-
-Required properties:
-  - compatible: Should be "atmel,<chip>-adc"
-    <chip> can be "at91sam9260", "at91sam9g45" or "at91sam9x5"
-  - reg: Should contain ADC registers location and length
-  - interrupts: Should contain the IRQ line for the ADC
-  - clock-names: tuple listing input clock names.
-	Required elements: "adc_clk", "adc_op_clk".
-  - clocks: phandles to input clocks.
-  - atmel,adc-channels-used: Bitmask of the channels muxed and enable for this
-    device
-  - atmel,adc-startup-time: Startup Time of the ADC in microseconds as
-    defined in the datasheet
-  - atmel,adc-vref: Reference voltage in millivolts for the conversions
-  - atmel,adc-res: List of resolution in bits supported by the ADC. List size
-		   must be two at least.
-  - atmel,adc-res-names: Contains one identifier string for each resolution
-			 in atmel,adc-res property. "lowres" and "highres"
-			 identifiers are required.
-
-Optional properties:
-  - atmel,adc-use-external: Boolean to enable of external triggers
-  - atmel,adc-use-res: String corresponding to an identifier from
-		       atmel,adc-res-names property. If not specified, the highest
-		       resolution will be used.
-  - atmel,adc-sleep-mode: Boolean to enable sleep mode when no conversion
-  - atmel,adc-sample-hold-time: Sample and Hold Time in microseconds
-  - atmel,adc-ts-wires: Number of touch screen wires. Should be 4 or 5. If this
-                        value is set, then adc driver will enable touch screen
-                        support.
-    NOTE: when adc touch screen enabled, the adc hardware trigger will be
-          disabled. Since touch screen will occupied the trigger register.
-  - atmel,adc-ts-pressure-threshold: a pressure threshold for touchscreen. It
-                                     make touch detect more precision.
- 
-Optional trigger Nodes:
-  - Required properties:
-    * trigger-name: Name of the trigger exposed to the user
-    * trigger-value: Value to put in the Trigger register
-      to activate this trigger
-  - Optional properties:
-    * trigger-external: Is the trigger an external trigger?
-
-Examples:
-adc0: adc@fffb0000 {
-	compatible = "atmel,at91sam9260-adc";
-	reg = <0xfffb0000 0x100>;
-	interrupts = <20 4>;
-	clocks = <&adc_clk>, <&adc_op_clk>;
-	clock-names = "adc_clk", "adc_op_clk";
-	atmel,adc-channel-base = <0x30>;
-	atmel,adc-channels-used = <0xff>;
-	atmel,adc-drdy-mask = <0x10000>;
-	atmel,adc-num-channels = <8>;
-	atmel,adc-startup-time = <40>;
-	atmel,adc-status-register = <0x1c>;
-	atmel,adc-trigger-register = <0x08>;
-	atmel,adc-use-external;
-	atmel,adc-vref = <3300>;
-	atmel,adc-res = <8 10>;
-	atmel,adc-res-names = "lowres", "highres";
-	atmel,adc-use-res = "lowres";
-
-	trigger@0 {
-		trigger-name = "external-rising";
-		trigger-value = <0x1>;
-		trigger-external;
-	};
-	trigger@1 {
-		trigger-name = "external-falling";
-		trigger-value = <0x2>;
-		trigger-external;
-	};
-
-	trigger@2 {
-		trigger-name = "external-any";
-		trigger-value = <0x3>;
-		trigger-external;
-	};
-
-	trigger@3 {
-		trigger-name = "continuous";
-		trigger-value = <0x6>;
-	};
-};