@@ -6,11 +6,29 @@ Required properties:
* "adi,ad7682"
* "adi,ad7689"
- reg: spi chip select number for the device
- - vref-supply: The regulator supply for ADC reference voltage
-Example:
+Optional properties:
+ - adi,reference-select: Select the reference voltage source to use
+ when converting the input voltages. Valid values are:
+ 0: Internal 2.5V reference; temperature sensor enabled
+ 1: Internal 4.096V reference; temperature sensor enabled
+ 2: External reference, temperature sensor enabled, no buffer
+ 3: External reference, temperature sensor enabled, buffer enabled
+ 6: External reference, temperature sensor disabled, no buffer
+ 7: External reference, temperature sensor disabled, buffer enabled
+ - vref-supply: The regulator supply for ADC reference voltage. Required
+ if external reference selected by 'adi,reference-select'.
+
+Examples:
adc@0 {
compatible = "adi,ad7949";
reg = <0>;
+ adi,reference-select = <2>;
vref-supply = <&vdd_supply>;
};
+
+adc@0 {
+ compatible = "adi,ad7949";
+ reg = <0>;
+ adi,reference-select = <0>;
+};
Adding optional parameter to AD7949 to specify the source for the reference voltage signal. Default value is maintaned with option '6' to match previous version of driver. Signed-off-by: Adam Michaelis <adam.michaelis@rockwellcollins.com> --- V2: Add some defines to reduce use of magic numbers. --- .../devicetree/bindings/iio/adc/ad7949.txt | 22 ++++++++++++++++++++-- 1 file changed, 20 insertions(+), 2 deletions(-)