diff options
author | Maxime Ripard <maxime.ripard@free-electrons.com> | 2012-05-11 15:35:37 +0200 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-05-14 13:25:33 -0700 |
commit | e364185f3ed2ecc0a4dbfe2507f20fd5db76c966 (patch) | |
tree | 4fbeca090abfdc6b3c8605323606c395c8589916 /Documentation/devicetree | |
parent | 5d449e4b2f4cd4c3f1fcf26b79222e6f5758df70 (diff) |
IIO: AT91: Add DT support to at91_adc driver
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>
Diffstat (limited to 'Documentation/devicetree')
-rw-r--r-- | Documentation/devicetree/bindings/arm/atmel-adc.txt | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/arm/atmel-adc.txt b/Documentation/devicetree/bindings/arm/atmel-adc.txt new file mode 100644 index 00000000000..c63097d6afe --- /dev/null +++ b/Documentation/devicetree/bindings/arm/atmel-adc.txt @@ -0,0 +1,65 @@ +* 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>; + }; +}; |