[PATCH v3 1/2] dt-bindings: iio: frequency: add admfm2000

[Kim Seer Paller <kimseer.paller@analog.com>]

Dual microwave down converter module with input RF and LO frequency
ranges from 0.5 to 32 GHz and an output IF frequency range from 0.1 to
8 GHz. It consists of a LNA, mixer, IF filter, DSA, and IF amplifier
for each down conversion path.

Signed-off-by: Kim Seer Paller <kimseer.paller@analog.com>
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202311220624.J7Nqg5h1-lkp@intel.com/
---
V2 -> V3: Adjusted indentation to resolve wrong indentation warning. 
          Changed node name to converter. Updated the descriptions to clarify
          the properties.
V1 -> V2: Removed '|' after description. Specified the pins connected to
          the GPIOs. Added additionalProperties: false. Changed node name to gpio.
          Aligned < syntax with the previous syntax in the examples.

 .../bindings/iio/frequency/adi,admfm2000.yaml | 140 ++++++++++++++++++
 MAINTAINERS                                   |   7 +
 2 files changed, 147 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/frequency/adi,admfm2000.yaml

diff --git a/Documentation/devicetree/bindings/iio/frequency/adi,admfm2000.yaml b/Documentation/devicetree/bindings/iio/frequency/adi,admfm2000.yaml
new file mode 100644
index 000000000..57844c8b7
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/frequency/adi,admfm2000.yaml
@@ -0,0 +1,140 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright 2023 Analog Devices Inc.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/frequency/adi,admfm2000.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ADMFM2000 Dual Microwave Down Converter
+
+maintainers:
+  - Kim Seer Paller <kimseer.paller@analog.com>
+
+description:
+  Dual microwave down converter module with input RF and LO frequency ranges
+  from 0.5 to 32 GHz and an output IF frequency range from 0.1 to 8 GHz.
+  It consists of a LNA, mixer, IF filter, DSA, and IF amplifier for each down
+  conversion path.
+
+properties:
+  compatible:
+    enum:
+      - adi,admfm2000
+
+  switch1-gpios:
+    items:
+      - description:
+          Setting B15 GPIO to high and B16 GPIO to low will result in channel 1
+          being in Direct IF mode.
+      - description:
+          Setting B15 GPIO to low and B16 GPIO to high will result in channel 1
+          being in Mixer mode.
+
+  switch2-gpios:
+    items:
+      - description:
+          Setting K14 GPIO to high and L14 GPIO to low will result in channel 2
+          being in Mixer mode.
+      - description:
+          Setting K14 GPIO to low and L14 GPIO to high will result in channel 2
+          being in Direct IF mode.
+
+  attenuation1-gpios:
+    description:
+      Must contain an array of 5 GPIO specifiers, referring to the GPIO pins
+      connected to the C14, C15, C16, D14, and D15. The DSA attenuation control
+      is by the logic level of the GPIO pins. All high at the logic level on
+      the GPIO pins give the minimum attenuation, 0 dB and all low for the
+      maximum attenuation, at 31 dB.
+    minItems: 5
+    maxItems: 5
+
+  attenuation2-gpios:
+    description:
+      Must contain an array of 5 GPIO specifiers, referring to the GPIO pins
+      connected to the L15, L16, M14, M15, and M16. The DSA attenuation control
+      is by the logic level of the GPIO pins. All high at the logic level on
+      the GPIO pins give the minimum attenuation, 0 dB and all low for the
+      maximum attenuation, at 31 dB.
+    minItems: 5
+    maxItems: 5
+
+  '#address-cells':
+    const: 1
+
+  '#size-cells':
+    const: 0
+
+patternProperties:
+  "^channel@[0-1]$":
+    type: object
+    description: Represents a channel of the device.
+
+    additionalProperties: false
+
+    properties:
+      reg:
+        description:
+          The channel number.
+        minimum: 0
+        maximum: 1
+
+      adi,mode:
+        description:
+          RF path selected for the channel.
+            0 - Direct IF mode
+            1 - Mixer mode
+        $ref: /schemas/types.yaml#/definitions/uint32
+        enum: [0, 1]
+
+    required:
+      - reg
+      - adi,mode
+
+required:
+  - compatible
+  - switch1-gpios
+  - switch2-gpios
+  - attenuation1-gpios
+  - attenuation2-gpios
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    converter {
+      compatible = "adi,admfm2000";
+
+      switch1-gpios = <&gpio 1 GPIO_ACTIVE_LOW>,
+                      <&gpio 2 GPIO_ACTIVE_HIGH>;
+
+      switch2-gpios = <&gpio 3 GPIO_ACTIVE_LOW>,
+                      <&gpio 4 GPIO_ACTIVE_HIGH>;
+
+      attenuation1-gpios = <&gpio 17 GPIO_ACTIVE_LOW>,
+                           <&gpio 22 GPIO_ACTIVE_LOW>,
+                           <&gpio 23 GPIO_ACTIVE_LOW>,
+                           <&gpio 24 GPIO_ACTIVE_LOW>,
+                           <&gpio 25 GPIO_ACTIVE_LOW>;
+
+      attenuation2-gpios = <&gpio 0 GPIO_ACTIVE_LOW>,
+                           <&gpio 5 GPIO_ACTIVE_LOW>,
+                           <&gpio 6 GPIO_ACTIVE_LOW>,
+                           <&gpio 16 GPIO_ACTIVE_LOW>,
+                           <&gpio 26 GPIO_ACTIVE_LOW>;
+
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      channel@0 {
+        reg = <0>;
+        adi,mode = <1>;
+      };
+
+      channel@1 {
+        reg = <1>;
+        adi,mode = <1>;
+      };
+    };
+...
diff --git a/MAINTAINERS b/MAINTAINERS
index 0e79e24b6..f1692ec68 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1247,6 +1247,13 @@ W:	https://ez.analog.com/linux-software-drivers
 F:	Documentation/devicetree/bindings/hwmon/adi,adm1177.yaml
 F:	drivers/hwmon/adm1177.c
 
+ANALOG DEVICES INC ADMFM2000 DRIVER
+M:	Kim Seer Paller <kimseer.paller@analog.com>
+L:	linux-iio@vger.kernel.org
+S:	Supported
+W:	https://ez.analog.com/linux-software-drivers
+F:	Documentation/devicetree/bindings/iio/frequency/adi,admfm2000.yaml
+
 ANALOG DEVICES INC ADMV1013 DRIVER
 M:	Antoniu Miclaus <antoniu.miclaus@analog.com>
 L:	linux-iio@vger.kernel.org

base-commit: c2d5304e6c648ebcf653bace7e51e0e6742e46c8
-- 
2.34.1