Add support for ADAQ42xx

AD4630 and ADAQ42xx designs are very similar, differing mainly on the
availability (or not) of PGIA gain.
Add input scale properties to handle ADAQ42xx PGIA control and add
ADAQ4216, ADAQ4220, and ADAQ4224 to the list of supported devices.

Signed-off-by: Marcelo Schmitt <[email protected]>

adi/ad4630.py

@@ -2,6 +2,7 @@
 #
 # SPDX short identifier: ADIBSD
 
+from decimal import Decimal
 
 import numpy as np
 from adi.attribute import attribute
@@ -25,25 +26,27 @@ class ad4630(rx, context_manager, attribute):
 
     """ AD4630 is low power 24-bit precision SAR ADC """
 
+    _compatible_parts = ["ad4630-24", "ad4030-24", "ad4630-16"]
     _complex_data = False
     _data_type = np.uint32
     _device_name = ""
     _rx_channel_names = []
 
     """ Default part to initialize is ad4630-24. If you don't hardware test fails"""
 
+    def __compat_parts__(self):
+        return ad4630._compatible_parts
+
     def __init__(self, uri="", device_name="ad4630-24"):
 
         context_manager.__init__(self, uri, self._device_name)
 
-        compatible_parts = ["ad4630-24", "ad4030-24", "ad4630-16"]
-
-        if device_name not in compatible_parts:
+        if device_name not in self.__compat_parts__(self):
             raise Exception(
                 "Not a compatible device: "
                 + str(device_name)
                 + ". Please select from "
-                + str(compatible_parts)
+                + str(self.__compat_parts__(self))
             )
         else:
             self._ctrl = self._ctx.find_device(device_name)
@@ -166,3 +169,33 @@ def calibscale(self):
         def calibscale(self, calibscale):
             """Set calibration scale value."""
             self._set_iio_attr(self.name, "calibscale", False, calibscale, self._ctrl)
+
+
+class adaq42xx(ad4630):
+
+    """ ADAQ4224 is a 24-bit precision SAR ADC data acquisition module """
+
+    _compatible_parts = ["adaq4224", "adaq4216", "adaq4220"]
+
+    def __compat_parts__(self):
+        return adaq42xx._compatible_parts
+
+    def __init__(self, uri="", device_name="adaq4224"):
+        super().__init__(self, uri="", device_name="adaq4224")
+
+    class _channel(ad4630._channel):
+        """ADAQ42xx differential channel."""
+
+        @property
+        def scale_available(self):
+            """Provides all available scale(gain) settings for the ADAQ42xx channel"""
+            return self._get_iio_attr(self.channel[0].name, "scale_available", False)
+
+        @property
+        def scale(self):
+            """ADAQ42xx channel scale"""
+            return float(self._get_iio_attr_str(self.name, "scale", False))
+
+        @scale.setter
+        def scale(self, value):
+            self._set_iio_attr(self.name, "scale", False, str(Decimal(value).real))

supported_parts.md

@@ -99,6 +99,9 @@
 - AD4858
 - AD9739A
 - ADA4961
+- ADAQ4216
+- ADAQ4220
+- ADAQ4224
 - ADAQ8092
 - ADAR1000
 - ADF4159