[PATCH v1 1/2] dt-bindings: iio: adc: add ti,ads1119

[Francesco Dolcini <francesco@dolcini.it>]

From: João Paulo Gonçalves <joao.goncalves@toradex.com>

Add devicetree bindings for Texas Instruments ADS1119 16-bit ADC
with I2C interface.

Datasheet: https://www.ti.com/lit/gpn/ads1119
Signed-off-by: João Paulo Gonçalves <joao.goncalves@toradex.com>
Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
---
 .../bindings/iio/adc/ti,ads1119.yaml          | 122 ++++++++++++++++++
 MAINTAINERS                                   |   7 +
 2 files changed, 129 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/adc/ti,ads1119.yaml

diff --git a/Documentation/devicetree/bindings/iio/adc/ti,ads1119.yaml b/Documentation/devicetree/bindings/iio/adc/ti,ads1119.yaml
new file mode 100644
index 000000000000..ab4f01199dbe
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/ti,ads1119.yaml
@@ -0,0 +1,122 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/adc/ti,ads1119.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments ADS1119 ADC
+
+maintainers:
+  - João Paulo Gonçalves <jpaulo.silvagoncalves@gmail.com>
+
+description: |
+  The TI ADS1119 is a precision 16-bit ADC over I2C that offers single-ended and
+  differential measurements using a multiplexed input. It features a programmable
+  gain, a programmable sample rate, an internal oscillator and voltage reference,
+  and a 50/60Hz rejection filter.
+
+properties:
+  compatible:
+    const: ti,ads1119
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  reset-gpios:
+    maxItems: 1
+
+  vref-supply:
+    description:
+      ADC external reference voltage (VREF).
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 0
+
+  "#io-channel-cells":
+    const: 1
+
+required:
+  - compatible
+  - reg
+  - "#address-cells"
+  - "#size-cells"
+
+patternProperties:
+  "^channel@([0-6])$":
+    $ref: adc.yaml
+    type: object
+    description: |
+      ADC channels.
+
+    properties:
+      reg:
+        description: |
+          0: Voltage over AIN0 and AIN1.
+          1: Voltage over AIN2 and AIN3.
+          2: Voltage over AIN1 and AIN2.
+          3: Voltage over AIN0 and GND.
+          4: Voltage over AIN1 and GND.
+          5: Voltage over AIN2 and GND.
+          6: Voltage over AIN3 and GND.
+        items:
+          - minimum: 0
+            maximum: 6
+
+      ti,gain:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description: |
+          PGA gain value.
+        enum: [1, 4]
+        default: 1
+
+      ti,datarate:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description: |
+          Data acquisition rate in samples per second.
+        enum: [20, 90, 330, 1000]
+        default: 20
+
+    required:
+      - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/gpio/gpio.h>
+
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        adc@40 {
+            compatible = "ti,ads1119";
+            reg = <0x40>;
+            #address-cells = <1>;
+            #size-cells = <0>;
+            #io-channel-cells = <1>;
+
+            channel@0 {
+                reg = <0>;
+                ti,gain = <4>;
+                ti,datarate = <330>;
+            };
+
+            channel@4 {
+                reg = <4>;
+                ti,datarate = <1000>;
+            };
+
+            channel@5 {
+                reg = <5>;
+                ti,gain = <4>;
+            };
+        };
+    };
diff --git a/MAINTAINERS b/MAINTAINERS
index d6c90161c7bf..f1b2c4b815e2 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -22380,6 +22380,13 @@ M:	Robert Richter <rric@kernel.org>
 S:	Odd Fixes
 F:	drivers/gpio/gpio-thunderx.c
 
+TI ADS1119 ADC DRIVER
+M:	Francesco Dolcini <francesco@dolcini.it>
+M:	João Paulo Gonçalves <jpaulo.silvagoncalves@gmail.com>
+L:	linux-iio@vger.kernel.org
+S:	Maintained
+F:	Documentation/devicetree/bindings/iio/adc/ti,ads1119.yaml
+
 TI ADS7924 ADC DRIVER
 M:	Hugo Villeneuve <hvilleneuve@dimonoff.com>
 L:	linux-iio@vger.kernel.org
-- 
2.39.2