From: Rodrigo Alencar <rodrigo.alencar@analog.com>

Add device tree binding documentation for amplifiers and digital
attenuators. This covers different device variants with similar
SPI control.

Signed-off-by: Rodrigo Alencar <rodrigo.alencar@analog.com>
---
 .../bindings/iio/amplifiers/adi,ad8366.yaml        | 85 ++++++++++++++++++++++
 MAINTAINERS                                        |  1 +
 2 files changed, 86 insertions(+)

diff --git a/Documentation/devicetree/bindings/iio/amplifiers/adi,ad8366.yaml b/Documentation/devicetree/bindings/iio/amplifiers/adi,ad8366.yaml
new file mode 100644
index 000000000000..7477bb9b5071
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/amplifiers/adi,ad8366.yaml
@@ -0,0 +1,85 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/amplifiers/adi,ad8366.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: AD8366, similar Gain Amplifiers and Digital Attenuators
+
+maintainers:
+  - Michael Hennerich <michael.hennerich@analog.com>
+  - Rodrigo Alencar <rodrigo.alencar@analog.com>
+
+description: |
+  Digital Variable Gain Amplifiers (VGAs) and Digital Attenuators with
+  SPI interface.
+
+properties:
+  compatible:
+    enum:
+      - adi,ad8366
+      - adi,ada4961
+      - adi,adl5240
+      - adi,adrf5720
+      - adi,adrf5730
+      - adi,adrf5731
+      - adi,hmc271a
+      - adi,hmc792a
+      - adi,hmc1018a
+      - adi,hmc1019a
+      - adi,hmc1119
+
+  reg:
+    maxItems: 1
+
+  vcc-supply:
+    description: Regulator that provides power to the device.
+
+  reset-gpios:
+    maxItems: 1
+    description:
+      GPIO pin used to reset the device.
+
+  enable-gpios:
+    maxItems: 1
+    description:
+      GPIO pin used to enable the device.
+
+required:
+  - compatible
+  - reg
+  - vcc-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>;
+
+      amplifier@0 {
+        compatible = "adi,ad8366";
+        reg = <0>;
+        spi-max-frequency = <1000000>;
+        vcc-supply = <&vcc_3v3>;
+      };
+    };
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    spi {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      attenuator@1 {
+        compatible = "adi,adrf5730";
+        reg = <1>;
+        spi-max-frequency = <1000000>;
+        vcc-supply = <&vcc_3v3>;
+      };
+    };
+...
diff --git a/MAINTAINERS b/MAINTAINERS
index 9c8e83470464..0bbeea028cc0 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1589,6 +1589,7 @@ M:	Rodrigo Alencar <rodrigo.alencar@analog.com>
 L:	linux-iio@vger.kernel.org
 S:	Supported
 W:	https://ez.analog.com/linux-software-drivers
+F:	Documentation/devicetree/bindings/iio/amplifiers/adi,ad8366.yaml
 F:	drivers/iio/amplifiers/ad8366.c
 
 ANALOG DEVICES INC AD9467 DRIVER

-- 
2.43.0

On Mon, Jan 19, 2026 at 02:36:56PM +0000, Rodrigo Alencar wrote:
> Add device tree binding documentation for amplifiers and digital
> attenuators. This covers different device variants with similar
> SPI control.
> 
> Signed-off-by: Rodrigo Alencar <rodrigo.alencar@analog.com>
> ---
>  .../bindings/iio/amplifiers/adi,ad8366.yaml        | 85 ++++++++++++++++++++++
>  MAINTAINERS                                        |  1 +
>  2 files changed, 86 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/iio/amplifiers/adi,ad8366.yaml b/Documentation/devicetree/bindings/iio/amplifiers/adi,ad8366.yaml
> new file mode 100644
> index 000000000000..7477bb9b5071
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/iio/amplifiers/adi,ad8366.yaml
> @@ -0,0 +1,85 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/iio/amplifiers/adi,ad8366.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: AD8366, similar Gain Amplifiers and Digital Attenuators

s/,/and/

> +
> +maintainers:
> +  - Michael Hennerich <michael.hennerich@analog.com>
> +  - Rodrigo Alencar <rodrigo.alencar@analog.com>
> +
> +description: |

Do not need '|' unless you need to preserve formatting.

> +  Digital Variable Gain Amplifiers (VGAs) and Digital Attenuators with
> +  SPI interface.
> +
> +properties:
> +  compatible:
> +    enum:
> +      - adi,ad8366
> +      - adi,ada4961
> +      - adi,adl5240
> +      - adi,adrf5720
> +      - adi,adrf5730
> +      - adi,adrf5731
> +      - adi,hmc271a
> +      - adi,hmc792a
> +      - adi,hmc1018a
> +      - adi,hmc1019a
> +      - adi,hmc1119
> +
> +  reg:
> +    maxItems: 1
> +
> +  vcc-supply:
> +    description: Regulator that provides power to the device.
> +
> +  reset-gpios:
> +    maxItems: 1
> +    description:
> +      GPIO pin used to reset the device.

Drop description, redundant, said nothing more other than what property
already said. This cannot be a something else than GPIO and cannot be
used for something else than resetting device.

> +
> +  enable-gpios:
> +    maxItems: 1
> +    description:
> +      GPIO pin used to enable the device.

Drop description.

> +
> +required:
> +  - compatible
> +  - reg
> +  - vcc-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>;
> +
> +      amplifier@0 {
> +        compatible = "adi,ad8366";
> +        reg = <0>;
> +        spi-max-frequency = <1000000>;
> +        vcc-supply = <&vcc_3v3>;
> +      };
> +    };
> +  - |
> +    #include <dt-bindings/gpio/gpio.h>
> +    spi {

Drop second example. It's the same as first.

Best regards,
Krzysztof