[PATCH 1/2] dt-bindings: iio: adc: adding MCP3564 ADC

[<marius.cristea@microchip.com>]

From: Marius Cristea <marius.cristea@microchip.com>

This is the device tree schema for iio driver for
Microchip family of 153.6 ksps, Low-Noise 16/24-Bit
Delta-Sigma ADCs with an SPI interface.

Signed-off-by: Marius Cristea <marius.cristea@microchip.com>
---
 .../bindings/iio/adc/microchip,mcp3564.yaml   | 88 +++++++++++++++++++
 1 file changed, 88 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/adc/microchip,mcp3564.yaml

diff --git a/Documentation/devicetree/bindings/iio/adc/microchip,mcp3564.yaml b/Documentation/devicetree/bindings/iio/adc/microchip,mcp3564.yaml
new file mode 100644
index 000000000000..407a125e3776
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/microchip,mcp3564.yaml
@@ -0,0 +1,88 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/adc/microchip,mcp3564.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Microchip MCP346X and MCP356X ADC Family
+
+maintainers:
+  - Marius Cristea <marius.cristea@microchip.com>
+
+description: |
+   Bindings for the Microchip family of 153.6 ksps, Low-Noise 16/24-Bit
+   Delta-Sigma ADCs with an SPI interface.
+
+properties:
+  compatible:
+    enum:
+      - microchip,mcp3461
+      - microchip,mcp3462
+      - microchip,mcp3464
+      - microchip,mcp3461r
+      - microchip,mcp3462r
+      - microchip,mcp3464r
+      - microchip,mcp3561
+      - microchip,mcp3562
+      - microchip,mcp3564
+      - microchip,mcp3561r
+      - microchip,mcp3562r
+      - microchip,mcp3564r
+
+  reg:
+    maxItems: 1
+
+  spi-max-frequency: true
+
+  spi-cpha: true
+
+  spi-cpol: true
+
+  vref-supply:
+    description:
+      Some devices have a specific reference voltage supplied on a different
+      pin to the other supplies. Needed to be able to establish channel scaling
+      unless there is also an internal reference available (e.g. mcp3564r)
+
+  microchip,hw-device-address:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    minimum: 0
+    maximum: 3
+    description:
+      The address is set on a per-device basis by fuses in the factory,
+      configured on request. If not requested, the fuses are set for 0x1.
+      The device address is part of the device markings to avoid
+      potential confusion. This address is coded on two bits, so four possible
+      addresses are available when multiple devices are present on the same
+      SPI bus with only one Chip Select line for all devices.
+
+  "#io-channel-cells":
+    const: 1
+
+dependencies:
+  spi-cpol: [ spi-cpha ]
+  spi-cpha: [ spi-cpol ]
+
+required:
+  - compatible
+  - microchip,hw-device-address
+
+additionalProperties: false
+
+examples:
+  - |
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        adc@0 {
+            compatible = "microchip,mcp3564r";
+            reg = <0>;
+            vref-supply = <&vref_reg>;
+            spi-cpha;
+            spi-cpol;
+            spi-max-frequency = <10000000>;
+            microchip,hw-device-address = <1>;
+        };
+    };
+...
-- 
2.34.1