From: Alisa-Dariana Roman <alisa.roman@xxxxxxxxxx>
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 | 69 +++++++++++++++++++
1 file changed, 69 insertions(+)
diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7192.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad7192.yaml
index 16def2985ab4..b9a9f7b20670 100644
--- a/Documentation/devicetree/bindings/iio/adc/adi,ad7192.yaml
+++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7192.yaml
@@ -21,8 +21,15 @@ properties:
- adi,ad7190
- adi,ad7192
- adi,ad7193
+ - adi,ad7194
- adi,ad7195
+ '#address-cells':
+ const: 1
+
+ '#size-cells':
+ const: 0
+
reg:
maxItems: 1
@@ -96,6 +103,31 @@ required:
- spi-cpol
- spi-cpha
+patternProperties:
+ "^channel@([0-9a-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
+
allOf:
- $ref: /schemas/spi/spi-peripheral-props.yaml#
@@ -127,3 +159,40 @@ 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
