Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / Documentation / devicetree / bindings / staging / iio / adc / spear-adc.txt

diff --git a/kernel/Documentation/devicetree/bindings/staging/iio/adc/spear-adc.txt b/kernel/Documentation/devicetree/bindings/staging/iio/adc/spear-adc.txt
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+* ST SPEAr ADC device driver
+
+Required properties:
+- compatible: Should be "st,spear600-adc"
+- reg: Address and length of the register set for the device
+- interrupt-parent: Should be the phandle for the interrupt controller
+  that services interrupts for this device
+- interrupts: Should contain the ADC interrupt
+- sampling-frequency: Default sampling frequency
+
+Optional properties:
+- vref-external: External voltage reference in milli-volts. If omitted
+  the internal voltage reference will be used.
+- average-samples: Number of samples to generate an average value. If
+  omitted, single data conversion will be used.
+
+Examples:
+
+       adc: adc@d8200000 {
+               compatible = "st,spear600-adc";
+               reg = <0xd8200000 0x1000>;
+               interrupt-parent = <&vic1>;
+               interrupts = <6>;
+               sampling-frequency = <5000000>;
+               vref-external = <2500>; /* 2.5V VRef */
+       };