linux-kernel - [PATCH 1/2] dt-bindings: iio: dac: add MCP4821

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Date:   Fri, 17 Nov 2023 13:00:37 +0530
From:   Anshul Dalal <anshulusr@...il.com>
To:     linux-kernel@...r.kernel.org, linux-iio@...r.kernel.org,
        devicetree@...r.kernel.org
Cc:     Anshul Dalal <anshulusr@...il.com>,
        Conor Dooley <conor+dt@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        linux-kernel-mentees@...ts.linuxfoundation.org,
        Jonathan Cameron <jic23@...nel.org>,
        Shuah Khan <skhan@...uxfoundation.org>
Subject: [PATCH 1/2] dt-bindings: iio: dac: add MCP4821

Adds support for MCP48xx series of DACs.

Datasheet:
  [MCP48x1] https://ww1.microchip.com/downloads/en/DeviceDoc/22244B.pdf
  [MCP48x2] https://ww1.microchip.com/downloads/en/DeviceDoc/20002249B.pdf

Signed-off-by: Anshul Dalal <anshulusr@...il.com>
---
 .../bindings/iio/dac/microchip,mcp4821.yaml   | 63 +++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/dac/microchip,mcp4821.yaml

diff --git a/Documentation/devicetree/bindings/iio/dac/microchip,mcp4821.yaml b/Documentation/devicetree/bindings/iio/dac/microchip,mcp4821.yaml
new file mode 100644
index 000000000000..904de15300bd
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/dac/microchip,mcp4821.yaml
@@ -0,0 +1,63 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/dac/microchip,mcp4821.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Microchip MCP4821 and similar DACs
+
+description: |
+  Supports MCP48x1 (single channel) and MCP48x2 (dual channel) series of DACs.
+  Device supports simplex communication over SPI in Mode 0,1 and Mode 1,1.
+
+  +---------+--------------+-------------+
+  | Device  |  Resolution  |   Channels  |
+  |---------|--------------|-------------|
+  | MCP4801 |     8-bit    |      1      |
+  | MCP4811 |    10-bit    |      1      |
+  | MCP4821 |    12-bit    |      1      |
+  | MCP4802 |     8-bit    |      2      |
+  | MCP4812 |    10-bit    |      2      |
+  | MCP4822 |    12-bit    |      2      |
+  +---------+--------------+-------------+
+
+  Datasheet:
+    MCP48x1: https://ww1.microchip.com/downloads/en/DeviceDoc/22244B.pdf
+    MCP48x2: https://ww1.microchip.com/downloads/en/DeviceDoc/20002249B.pdf
+
+maintainers:
+  - Anshul Dalal <anshulusr@...il.com>
+
+properties:
+  compatible:
+    enum:
+      - microchip,mcp4801
+      - microchip,mcp4811
+      - microchip,mcp4821
+      - microchip,mcp4802
+      - microchip,mcp4812
+      - microchip,mcp4822
+
+  reg:
+    maxItems: 1
+
+  vdd-supply: true
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        dac@0 {
+            compatible = "microchip,mcp4821";
+            reg = <0>;
+            vdd-supply = <&vdd_regulator>;
+        };
+    };
-- 
2.42.1