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Diffstat (limited to 'Documentation/devicetree/bindings/iio/adc/at91-sama5d2_adc.txt')
| -rw-r--r-- | Documentation/devicetree/bindings/iio/adc/at91-sama5d2_adc.txt | 50 |
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diff --git a/Documentation/devicetree/bindings/iio/adc/at91-sama5d2_adc.txt b/Documentation/devicetree/bindings/iio/adc/at91-sama5d2_adc.txt new file mode 100644 index 000000000..4a3c1d496 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/adc/at91-sama5d2_adc.txt @@ -0,0 +1,50 @@ +* AT91 SAMA5D2 Analog to Digital Converter (ADC) + +Required properties: + - compatible: Should be "atmel,sama5d2-adc". + - reg: Should contain ADC registers location and length. + - interrupts: Should contain the IRQ line for the ADC. + - clocks: phandle to device clock. + - clock-names: Must be "adc_clk". + - vref-supply: Supply used as reference for conversions. + - vddana-supply: Supply for the adc device. + - atmel,min-sample-rate-hz: Minimum sampling rate, it depends on SoC. + - atmel,max-sample-rate-hz: Maximum sampling rate, it depends on SoC. + - atmel,startup-time-ms: Startup time expressed in ms, it depends on SoC. + - atmel,trigger-edge-type: One of possible edge types for the ADTRG hardware + trigger pin. When the specific edge type is detected, the conversion will + start. Possible values are rising, falling, or both. + This property uses the IRQ edge types values: IRQ_TYPE_EDGE_RISING , + IRQ_TYPE_EDGE_FALLING or IRQ_TYPE_EDGE_BOTH + +Optional properties: + - dmas: Phandle to dma channel for the ADC. + - dma-names: Must be "rx" when dmas property is being used. + See ../../dma/dma.txt for details. + - #io-channel-cells: in case consumer drivers are attached, this must be 1. + See <Documentation/devicetree/bindings/iio/iio-bindings.txt> for details. + +Properties for consumer drivers: + - Consumer drivers can be connected to this producer device, as specified + in <Documentation/devicetree/bindings/iio/iio-bindings.txt> + - Channels exposed are specified in: + <dt-bindings/iio/adc/at91-sama5d2_adc.txt> + +Example: + +adc: adc@fc030000 { + compatible = "atmel,sama5d2-adc"; + reg = <0xfc030000 0x100>; + interrupts = <40 IRQ_TYPE_LEVEL_HIGH 7>; + clocks = <&adc_clk>; + clock-names = "adc_clk"; + atmel,min-sample-rate-hz = <200000>; + atmel,max-sample-rate-hz = <20000000>; + atmel,startup-time-ms = <4>; + vddana-supply = <&vdd_3v3_lp_reg>; + vref-supply = <&vdd_3v3_lp_reg>; + atmel,trigger-edge-type = <IRQ_TYPE_EDGE_BOTH>; + dmas = <&dma0 (AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1) | AT91_XDMAC_DT_PERID(25))>; + dma-names = "rx"; + #io-channel-cells = <1>; +} |