linux-kernel - [PATCH] dt-bindings: iio: adc: ti,adc081c: Document the binding

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Message-Id: <20221125220903.8632-1-samuel@sholland.org>
Date:   Fri, 25 Nov 2022 16:09:03 -0600
From:   Samuel Holland <samuel@...lland.org>
To:     Jonathan Cameron <jic23@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc:     Samuel Holland <samuel@...lland.org>, devicetree@...r.kernel.org,
        linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] dt-bindings: iio: adc: ti,adc081c: Document the binding

Linux has a driver for these ADCs at drivers/iio/adc/ti-adc081c.c, but
the compatible strings were undocumented. Add a binding for them. The
hardware has an alert interrupt output, but existing ti,adc081c users
do not provide the 'interrupts' property, so leave it as optional.

Signed-off-by: Samuel Holland <samuel@...lland.org>
---

 .../bindings/iio/adc/ti,adc081c.yaml          | 55 +++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/adc/ti,adc081c.yaml

diff --git a/Documentation/devicetree/bindings/iio/adc/ti,adc081c.yaml b/Documentation/devicetree/bindings/iio/adc/ti,adc081c.yaml
new file mode 100644
index 000000000000..caaad777580c
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/ti,adc081c.yaml
@@ -0,0 +1,55 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/adc/ti,adc081c.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: TI Single-channel I2C ADCs
+
+maintainers:
+  - Jonathan Cameron <jic23@...nel.org>
+  - Lars-Peter Clausen <lars@...afoo.de>
+
+description: |
+  Single-channel ADC supporting 8, 10, or 12-bit samples and high/low alerts.
+
+properties:
+  compatible:
+    enum:
+      - ti,adc081c
+      - ti,adc101c
+      - ti,adc121c
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  vref-supply:
+    description:
+      Regulator for the combined power supply and voltage reference
+
+  "#io-channel-cells":
+    const: 1
+
+required:
+  - compatible
+  - reg
+  - vref-supply
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        adc@52 {
+            compatible = "ti,adc081c";
+            reg = <0x52>;
+            vref-supply = <&reg_2p5v>;
+        };
+    };
+...
-- 
2.37.4