[PATCH v7 1/2] dt-bindings: iio: dac: Add ADI AD5706R

[Alexis Czezar Torreno <alexisczezar.torreno@analog.com>]

Add device tree binding documentation for the Analog Devices
AD5706R 4-channel 16-bit current output digital-to-analog converter.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Alexis Czezar Torreno <alexisczezar.torreno@analog.com>
---
Changes in v5:
  - Changed out-en-gpios to enable-gpios.

Changes in v4:
  - Reverted pwm and gpio entries
  - Added missing power supply properties
  - Clocks not added back as they were driver specific

Changes in v3:
  - Added allOf and ref to spi-peripheral-props.yaml
  - Changed additionalProperties to unevaluatedProperties
  - Added avdd-supply property and added it to required

Changes in v1:
  - Removed clocks, clock-names, pwms, pwm-names, gpio properties
  - Simplified example to use plain SPI bus
---
---
 .../devicetree/bindings/iio/dac/adi,ad5706r.yaml   | 105 +++++++++++++++++++++
 MAINTAINERS                                        |   7 ++
 2 files changed, 112 insertions(+)

diff --git a/Documentation/devicetree/bindings/iio/dac/adi,ad5706r.yaml b/Documentation/devicetree/bindings/iio/dac/adi,ad5706r.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..19cc744a9f0fc35907de8b8bdd9f088676620b54
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/dac/adi,ad5706r.yaml
@@ -0,0 +1,105 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/dac/adi,ad5706r.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Analog Devices AD5706R 4-Channel Current Output DAC
+
+maintainers:
+  - Alexis Czezar Torreno <alexisczezar.torreno@analog.com>
+
+description: |
+  The AD5706R is a 4-channel, 16-bit resolution, current output
+  digital-to-analog converter (DAC) with programmable output current
+  ranges (50mA, 150mA, 200mA, 300mA), an integrated 2.5V voltage
+  reference, and load DAC, A/B toggle, and dither functions.
+
+  Datasheet:
+    https://www.analog.com/en/products/ad5706r.html
+
+properties:
+  compatible:
+    enum:
+      - adi,ad5706r
+
+  reg:
+    maxItems: 1
+
+  avdd-supply:
+    description: Analog power supply (2.9V to 3.6V).
+
+  iovdd-supply:
+    description: Logic power supply (1.14V to 1.89V).
+
+  pvdd0-supply:
+    description: Power supply for IDAC0 channel (1.65V to AVDD).
+
+  pvdd1-supply:
+    description: Power supply for IDAC1 channel (1.65V to AVDD).
+
+  pvdd2-supply:
+    description: Power supply for IDAC2 channel (1.65V to AVDD).
+
+  pvdd3-supply:
+    description: Power supply for IDAC3 channel (1.65V to AVDD).
+
+  vref-supply:
+    description:
+      Optional external 2.5V voltage reference. If not provided, the
+      internal 2.5V reference is used.
+
+  pwms:
+    maxItems: 1
+    description:
+      Optional PWM connected to the LDAC/TGP/DCK pin for hardware
+      triggered DAC updates, toggle, or dither clock generation.
+
+  reset-gpios:
+    maxItems: 1
+    description:
+      GPIO connected to the active low RESET pin. If not provided,
+      software reset is used.
+
+  enable-gpios:
+    maxItems: 1
+    description:
+      GPIO connected to the active low OUT_EN pin. Controls whether
+      the current outputs are enabled or in high-Z/ground state.
+
+required:
+  - compatible
+  - reg
+  - avdd-supply
+  - iovdd-supply
+
+allOf:
+  - $ref: /schemas/spi/spi-peripheral-props.yaml#
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        dac@0 {
+            compatible = "adi,ad5706r";
+            reg = <0>;
+            avdd-supply = <&avdd>;
+            iovdd-supply = <&iovdd>;
+            pvdd0-supply = <&pvdd>;
+            pvdd1-supply = <&pvdd>;
+            pvdd2-supply = <&pvdd>;
+            pvdd3-supply = <&pvdd>;
+            vref-supply = <&vref>;
+            spi-max-frequency = <50000000>;
+            pwms = <&pwm0 0 1000000 0>;
+            reset-gpios = <&gpio0 10 GPIO_ACTIVE_LOW>;
+            enable-gpios = <&gpio0 12 GPIO_ACTIVE_LOW>;
+        };
+    };
+...
diff --git a/MAINTAINERS b/MAINTAINERS
index 1251965d70bdfa990c66966cd77f7ab52ae3385f..17a3d2d45fccb9cd3c93fd35666fb85d17d53cde 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1496,6 +1496,13 @@ W:	https://ez.analog.com/linux-software-drivers
 F:	Documentation/devicetree/bindings/iio/adc/adi,ad4851.yaml
 F:	drivers/iio/adc/ad4851.c
 
+ANALOG DEVICES INC AD5706R DRIVER
+M:	Alexis Czezar Torreno <alexisczezar.torreno@analog.com>
+L:	linux-iio@vger.kernel.org
+S:	Supported
+W:	https://ez.analog.com/linux-software-drivers
+F:	Documentation/devicetree/bindings/iio/dac/adi,ad5706r.yaml
+
 ANALOG DEVICES INC AD7091R DRIVER
 M:	Marcelo Schmitt <marcelo.schmitt@analog.com>
 L:	linux-iio@vger.kernel.org

-- 
2.34.1