Messages in this thread Patch in this message | | | From | Adam Michaelis <> | Date | Wed, 1 May 2019 14:30:16 -0500 | Subject | [PATCH 2/6] dt-bindings: iio: ad7949: Add adi,reference-select |
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From d228a1a119e33aff91f481fb8ab301a027b5a4ac Mon Sep 17 00:00:00 2001 From: Adam Michaelis <adam.michaelis@rockwellcollins.com> Date: Thu, 25 Apr 2019 15:22:00 -0500 Subject: [PATCH 2/6] dt-bindings: iio: ad7949: Add adi,reference-select
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> --- Sorry about the re-sends - GMail inserted HTML on me and it bounced from vger. --- .../devicetree/bindings/iio/adc/ad7949.txt | 22 ++++++++++++++++++++-- 1 file changed, 20 insertions(+), 2 deletions(-)
diff --git a/Documentation/devicetree/bindings/iio/adc/ad7949.txt b/Documentation/devicetree/bindings/iio/adc/ad7949.txt index c7f5057356b1..14ee9a2cb2a5 100644 --- a/Documentation/devicetree/bindings/iio/adc/ad7949.txt +++ b/Documentation/devicetree/bindings/iio/adc/ad7949.txt @@ -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>; +}; -- 1.9.1
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