[PATCH 1/2] add binding for iio adc driver for TI ADS1018

[Iain Hunter <drhunter95@gmail.com>]

Add a new binding for new IIO ADS1018 driver.

Signed-off-by: Iain Hunter <drhunter95@gmail.com>
---
 .../bindings/iio/adc/ti,ads1018.yaml          | 109 ++++++++++++++++++
 1 file changed, 109 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/adc/ti,ads1018.yaml

diff --git a/Documentation/devicetree/bindings/iio/adc/ti,ads1018.yaml b/Documentation/devicetree/bindings/iio/adc/ti,ads1018.yaml
new file mode 100644
index 000000000000..ba0fdfba2c45
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/ti,ads1018.yaml
@@ -0,0 +1,109 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/adc/ti,ads1018.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: TI ADS1018 4 channel SPI analog to digital converter
+
+maintainers:
+  - Daniel Baluta <daniel.baluta@nxp.com>
+
+description: |
+  Datasheet at: https://www.ti.com/lit/gpn/ads1018
+  Supports both single ended and differential channels.
+
+properties:
+  compatible:
+    const: ti,ads1018
+
+  reg:
+    maxItems: 1
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 0
+
+  "#io-channel-cells":
+    const: 1
+
+required:
+  - compatible
+  - reg
+  - "#address-cells"
+  - "#size-cells"
+
+additionalProperties: false
+
+patternProperties:
+  "^channel@[0-7]+$":
+    type: object
+    description:
+      Child nodes needed for each channel that the platform uses.
+
+    properties:
+      reg:
+        description: |
+          0: Voltage over AIN0 and AIN1.
+          1: Voltage over AIN0 and AIN3.
+          2: Voltage over AIN1 and AIN3.
+          3: Voltage over AIN2 and AIN3.
+          4: Voltage over AIN0 and GND.
+          5: Voltage over AIN1 and GND.
+          6: Voltage over AIN2 and GND.
+          7: Voltage over AIN3 and GND.
+        items:
+          - minimum: 0
+            maximum: 7
+
+      ti,gain:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        minimum: 0
+        maximum: 5
+        description: |
+          pga is the programmable gain amplifier (values are full scale)
+          0: +/- 6.144 V
+          1: +/- 4.096 V
+          2: +/- 2.048 V (default)
+          3: +/- 1.024 V
+          4: +/- 0.512 V
+          5: +/- 0.256 V
+
+      ti,datarate:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        minimum: 0
+        maximum: 6
+        description: |
+          Data acquisition rate in samples per second
+          0: 128
+          1: 250
+          2: 490
+          3: 920
+          4: 1600 (default)
+          5: 2400
+          6: 3300
+
+    required:
+      - reg
+
+examples:
+  - |
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        adc@1 {
+            compatible = "ti,ads1018";
+            reg = <0x1>;
+            #address-cells = <1>;
+            #size-cells = <0>;
+            channel@4 {
+              reg = <4>;
+              ti,gain = <3>;
+              ti,datarate = <5>;
+            };
+        };
+    };
+...
-- 
2.25.1