e364185f3e
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
65 lines
1.9 KiB
Text
65 lines
1.9 KiB
Text
* AT91's Analog to Digital Converter (ADC)
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Required properties:
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- compatible: Should be "atmel,at91sam9260-adc"
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- reg: Should contain ADC registers location and length
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- interrupts: Should contain the IRQ line for the ADC
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- atmel,adc-channel-base: Offset of the first channel data register
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- atmel,adc-channels-used: Bitmask of the channels muxed and enable for this
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device
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- atmel,adc-drdy-mask: Mask of the DRDY interruption in the ADC
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- atmel,adc-num-channels: Number of channels available in the ADC
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- atmel,adc-startup-time: Startup Time of the ADC in microseconds as
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defined in the datasheet
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- atmel,adc-status-register: Offset of the Interrupt Status Register
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- atmel,adc-trigger-register: Offset of the Trigger Register
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- atmel,adc-vref: Reference voltage in millivolts for the conversions
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Optional properties:
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- atmel,adc-use-external: Boolean to enable of external triggers
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Optional trigger Nodes:
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- Required properties:
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* trigger-name: Name of the trigger exposed to the user
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* trigger-value: Value to put in the Trigger register
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to activate this trigger
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- Optional properties:
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* trigger-external: Is the trigger an external trigger?
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Examples:
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adc0: adc@fffb0000 {
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compatible = "atmel,at91sam9260-adc";
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reg = <0xfffb0000 0x100>;
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interrupts = <20 4>;
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atmel,adc-channel-base = <0x30>;
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atmel,adc-channels-used = <0xff>;
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atmel,adc-drdy-mask = <0x10000>;
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atmel,adc-num-channels = <8>;
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atmel,adc-startup-time = <40>;
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atmel,adc-status-register = <0x1c>;
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atmel,adc-trigger-register = <0x08>;
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atmel,adc-use-external;
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atmel,adc-vref = <3300>;
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trigger@0 {
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trigger-name = "external-rising";
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trigger-value = <0x1>;
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trigger-external;
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};
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trigger@1 {
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trigger-name = "external-falling";
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trigger-value = <0x2>;
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trigger-external;
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};
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trigger@2 {
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trigger-name = "external-any";
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trigger-value = <0x3>;
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trigger-external;
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};
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trigger@3 {
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trigger-name = "continuous";
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trigger-value = <0x6>;
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};
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};
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