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* AT91's Analog to Digital Converter (ADC)
Required properties:
- compatible: Should be "atmel,at91sam9260-adc"
- reg: Should contain ADC registers location and length
- interrupts: Should contain the IRQ line for the ADC
- atmel,adc-channel-base: Offset of the first channel data register
- atmel,adc-channels-used: Bitmask of the channels muxed and enable for this
device
- atmel,adc-drdy-mask: Mask of the DRDY interruption in the ADC
- atmel,adc-num-channels: Number of channels available in the ADC
- atmel,adc-startup-time: Startup Time of the ADC in microseconds as
defined in the datasheet
- atmel,adc-status-register: Offset of the Interrupt Status Register
- atmel,adc-trigger-register: Offset of the Trigger Register
- atmel,adc-vref: Reference voltage in millivolts for the conversions
Optional properties:
- atmel,adc-use-external: Boolean to enable of external triggers
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>;
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>;
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>;
};
};
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