linux-kernel - [PATCH v2 3/4] dt-bindings: iio: adc: ad7192: Add AD7194 support

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Date:   Tue, 14 Nov 2023 22:05:32 +0200
From:   Alisa-Dariana Roman <alisadariana@...il.com>
To:     Alisa-Dariana Roman <alisa.roman@...log.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Michael Hennerich <michael.hennerich@...log.com>
Cc:     linux-iio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Alexandru Tachici <alexandru.tachici@...log.com>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Michael Hennerich <Michael.Hennerich@...log.com>,
        Jonathan Cameron <jic23@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>
Subject: [PATCH v2 3/4] dt-bindings: iio: adc: ad7192: Add AD7194 support

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@...log.com>
---
 .../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