linux-kernel - [PATCH 1/2] dt-bindings: iio: adc: Add microchip MCP3561/2/4R devices

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Message-ID: <20230523124354.24294-1-mike.looijmans@topic.nl>
Date:   Tue, 23 May 2023 14:43:53 +0200
From:   Mike Looijmans <mike.looijmans@...ic.nl>
To:     devicetree@...r.kernel.org, linux-iio@...r.kernel.org
CC:     Mike Looijmans <mike.looijmans@...ic.nl>,
        Conor Dooley <conor+dt@...nel.org>,
        Jonathan Cameron <jic23@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Marcus Folkesson <marcus.folkesson@...il.com>,
        Puranjay Mohan <puranjay12@...il.com>,
        Rob Herring <robh+dt@...nel.org>, linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] dt-bindings: iio: adc: Add microchip MCP3561/2/4R devices

The MCP3564R is a 24-bit ADC with 8 multiplexed inputs. The MCP3561R is
the same device with 2 inputs, the MCP3562R has 4 inputs. The device
contains one ADC and a multiplexer to select the inputs to the ADC.

Signed-off-by: Mike Looijmans <mike.looijmans@...ic.nl>

---

 .../bindings/iio/adc/microchip,mcp356xr.yaml  | 84 +++++++++++++++++++
 1 file changed, 84 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/adc/microchip,mcp356xr.yaml

diff --git a/Documentation/devicetree/bindings/iio/adc/microchip,mcp356xr.yaml b/Documentation/devicetree/bindings/iio/adc/microchip,mcp356xr.yaml
new file mode 100644
index 000000000000..4aef166894c8
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/microchip,mcp356xr.yaml
@@ -0,0 +1,84 @@
+# SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
+# Copyright 2023 Topic Embedded Systems
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/adc/microchip,mcp356xr.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Microchip MCP3561R/MCP3562R/MCP3564R ADC
+
+maintainers:
+  - Mike Looijmans <mike.looijmans@...ic.nl>
+
+description: |
+  Bindings for the Microchip MCP356xR 8-channel ADC devices. Datasheet and info
+  can be found at: https://www.microchip.com/en-us/product/MCP3564R
+
+properties:
+  compatible:
+    enum:
+      - microchip,mcp3561r
+      - microchip,mcp3562r
+      - microchip,mcp3564r
+
+  reg:
+    maxItems: 1
+
+  spi-max-frequency:
+    maximum: 20000000
+
+  clocks:
+    description:
+      Phandle and clock identifier for external sampling clock.
+      If not specified, the internal crystal oscillator will be used.
+    maxItems: 1
+
+  interrupts:
+    description: IRQ line of the ADC
+    maxItems: 1
+
+  drive-open-drain:
+    description:
+      Whether to drive the IRQ signal as push-pull (default) or open-drain. Note
+      that the device requires this pin to become "high", otherwise it will stop
+      converting.
+    type: boolean
+
+  microchip,device-addr:
+    description: Device address when multiple chips are present on the same bus.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [0, 1, 2, 3]
+    default: 1
+
+  vref-supply:
+    description:
+      Phandle to the external reference voltage supply.
+      If not specified, the internal voltage reference (2.4V) will be used.
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+allOf:
+  - $ref: /schemas/spi/spi-peripheral-props.yaml#
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    spi {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      adc@0 {
+        compatible = "microchip,mcp3564r";
+        reg = <0>;
+        interrupt-parent = <&gpio5>;
+        interrupts = <15 2>;
+        spi-max-frequency = <20000000>;
+        microchip,device-addr = <1>;
+        vref-supply = <&vref_reg>;
+        clocks = <&xtal>;
+      };
+    };
-- 
2.17.1


Met vriendelijke groet / kind regards,

Mike Looijmans
System Expert


TOPIC Embedded Products B.V.
Materiaalweg 4, 5681 RJ Best
The Netherlands

T: +31 (0) 499 33 69 69
E: mike.looijmans@...icproducts.com
W: www.topic.nl

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