linux-kernel - [PATCH 2/3] dt-bindings: iio: adc: ad7192: Add AD7194 support

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Message-Id: <20231105193132.47009-3-alisadariana@gmail.com>
Date:   Sun,  5 Nov 2023 21:31:30 +0200
From:   alisadariana@...il.com
To:     unlisted-recipients:; (no To-header on input)
Cc:     Alisa-Dariana Roman <alisa.roman@...log.com>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Michael Hennerich <Michael.Hennerich@...log.com>,
        Alexandru Tachici <alexandru.tachici@...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>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Maksim Kiselev <bigunclemax@...il.com>,
        Arnd Bergmann <arnd@...db.de>,
        Cosmin Tanislav <demonsingur@...il.com>,
        Hugo Villeneuve <hvilleneuve@...onoff.com>,
        Marius Cristea <marius.cristea@...rochip.com>,
        Marcus Folkesson <marcus.folkesson@...il.com>,
        Ibrahim Tilki <Ibrahim.Tilki@...log.com>,
        ChiaEn Wu <chiaen_wu@...htek.com>,
        Ivan Mikhaylov <fr0st61te@...il.com>,
        Niklas Schnelle <schnelle@...ux.ibm.com>,
        linux-iio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 2/3] dt-bindings: iio: adc: ad7192: Add AD7194 support

From: Alisa-Dariana Roman <alisa.roman@...log.com>

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          | 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