Unlike the other AD719Xs, AD7194 has configurable differential
channels. The default configuration for these channels can be changed
from the devicetree.
Also add an example for AD7194 devicetree.
Signed-off-by: Alisa-Dariana Roman <alisa.roman@xxxxxxxxxx>
---
.../bindings/iio/adc/adi,ad7192.yaml | 74 +++++++++++++++++++
1 file changed, 74 insertions(+)
diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7192.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad7192.yaml
index 9b59d6eea368..800b396f5993 100644
--- a/Documentation/devicetree/bindings/iio/adc/adi,ad7192.yaml
+++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7192.yaml
@@ -21,6 +21,7 @@ properties:
- adi,ad7190
- adi,ad7192
- adi,ad7193
+ - adi,ad7194
- adi,ad7195
reg:
@@ -108,6 +109,42 @@ required:
allOf:
- $ref: /schemas/spi/spi-peripheral-props.yaml#
+ - if:
+ properties:
+ compatible:
+ const: adi,ad7194
+ then:
+ properties:
+ '#address-cells':
+ const: 1
+
+ '#size-cells':
+ const: 0
+
+ patternProperties:
+ "^channel@([0-7a-f])$":
+ type: object
+ $ref: adc.yaml
+ unevaluatedProperties: false
+
+ properties:
+ reg:
+ description: The channel index.
+ minimum: 0
+ maximum: 7
+
+ diff-channels:
+ description: |
+ The differential channel pair for Ad7194 configurable channels. The
+ first channel is the positive input, the second channel is the
+ negative input.
+ items:
+ minimum: 1
+ maximum: 16
+
+ required:
+ - reg
+ - diff-channels
unevaluatedProperties: false
@@ -137,3 +174,40 @@ examples:
adi,burnout-currents-enable;
};
};
+ - |
+ spi {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ adc@0 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "adi,ad7194";
+ reg = <0>;
+ spi-max-frequency = <1000000>;
+ spi-cpol;
+ spi-cpha;
+ clocks = <&ad7192_mclk>;
+ clock-names = "mclk";
+ interrupts = <25 0x2>;
+ interrupt-parent = <&gpio>;
+ dvdd-supply = <&dvdd>;
+ avdd-supply = <&avdd>;
+ vref-supply = <&vref>;
+
+ adi,refin2-pins-enable;
+ adi,rejection-60-Hz-enable;
+ adi,buffer-enable;
+ adi,burnout-currents-enable;
+
+ channel@0 {
+ reg = <0>;
+ diff-channels = <1 6>;
+ };
+
+ channel@1 {
+ reg = <1>;
+ diff-channels = <2 3>;
+ };
+ };
+ };
--
2.34.1
