[PATCH v6 4/5] dt-bindings: iio: adc: ad7949: update voltage reference bindings
From: Liam Beguin <hidden>
Date: 2021-08-15 21:34:52
Also in:
linux-iio, lkml
Subsystem:
analog devices inc iio drivers, iio subsystem and drivers, open firmware and flattened device tree bindings, the rest · Maintainers:
Nuno Sá, Michael Hennerich, Jonathan Cameron, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
From: Liam Beguin <redacted> Update bindings to describe support for buffered and unbuffered external voltage references selection, and add adi,internal-ref-microvolt for internal voltage reference selection. Signed-off-by: Liam Beguin <redacted> --- .../bindings/iio/adc/adi,ad7949.yaml | 51 +++++++++++++++++-- 1 file changed, 48 insertions(+), 3 deletions(-)
diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7949.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad7949.yaml
index 9b56bd4d5510..0b10ed5f74ae 100644
--- a/Documentation/devicetree/bindings/iio/adc/adi,ad7949.yaml
+++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7949.yaml@@ -26,19 +26,43 @@ properties: reg: maxItems: 1 + vrefin-supply: + description: + Buffered ADC reference voltage supply. + vref-supply: description: - ADC reference voltage supply + Unbuffered ADC reference voltage supply. + + adi,internal-ref-microvolt: + description: | + Internal reference voltage selection in microvolts. + + If no internal reference is specified, the channel will default to the + external reference defined by vrefin-supply (or vref-supply). + vrefin-supply will take precedence over vref-supply if both are defined. + + If no supplies are defined, the reference selection will default to + 4096mV internal reference. + + enum: [2500000, 4096000] + default: 4096000 + spi-max-frequency: true - "#io-channel-cells": + '#io-channel-cells': const: 1 + '#address-cells': + const: 1 + + '#size-cells': + const: 0 + required: - compatible - reg - - vref-supply additionalProperties: false
@@ -49,9 +73,30 @@ examples: #size-cells = <0>; adc@0 { + #address-cells = <1>; + #size-cells = <0>; + compatible = "adi,ad7949"; reg = <0>; vref-supply = <&vdd_supply>; }; + + adc@1 { + #address-cells = <1>; + #size-cells = <0>; + + compatible = "adi,ad7949"; + reg = <1>; + vrefin-supply = <&vdd_supply>; + }; + + adc@2 { + #address-cells = <1>; + #size-cells = <0>; + + compatible = "adi,ad7949"; + reg = <2>; + adi,internal-ref-microvolt = <4096000>; + }; }; ...
--
2.32.0.452.g940fe202adcb