scripts: add script to generate the comparator silabs-acmp bindings header

The script added will combine all possible ACMP positive and negative
input values and define helper macros to make it easier for applications
to select ACMP inputs for their comparator driver. The script also
verifies that the integer input values are consistent between the parts
that this header is generated for. However, it must be noted that some
of the input defines may not be available as positive and/or negative
inputs for some devices. It's recommended to always reference your
part's design book before selecting any of the inputs in this generated
header.

Signed-off-by: Christian Galante <[email protected]>

Author: silabs-chgalant

scripts/gen_acmp.py

@@ -0,0 +1,97 @@
+"""
+Copyright (c) 2025 Silicon Laboratories Inc.
+
+SPDX-License-Identifier: Apache-2.0
+"""
+import argparse
+import re
+import datetime
+from pathlib import Path
+
+devices = {
+	"xg21": {
+		"bits": "platform/Device/SiliconLabs/EFR32MG21/Include/efr32mg21_acmp.h",
+  },
+	"xg23": {
+		"bits": "platform/Device/SiliconLabs/EFR32FG23/Include/efr32fg23_acmp.h",
+  },
+	"xg24": {
+		"bits": "platform/Device/SiliconLabs/EFR32MG24/Include/efr32mg24_acmp.h",
+  },
+	"xg27": {
+		"bits": "platform/Device/SiliconLabs/EFR32BG27/Include/efr32bg27_acmp.h",
+  },
+	"xg29": {
+		"bits": "platform/Device/SiliconLabs/EFR32MG29/Include/efr32mg29_acmp.h",
+  },
+}
+
+if __name__ == "__main__":
+  parser = argparse.ArgumentParser(description="Generate headers for Comparator for Series 2 "
+                                   "devices. The headers are used from DeviceTree, and represent "
+                                   "every ACMP input selection as a DT compatible macro.")
+  parser.add_argument("--out", "-o", type=Path, default=Path(__file__).parent / "out",
+                      help="Output directory. Defaults to the directory ./out/ relative to the "
+                      "script. Set to $ZEPHYR_BASE/include/zephyr/dt-bindings/comparator/ "
+                      "to directly generate output into the expected location within the Zephyr "
+                      "main tree.")
+  parser.add_argument("--sdk", "-s", type=Path, default=Path(__file__).parent.parent / "simplicity_sdk",
+                      help="Path to Simplicity SDK to extract data from. Defaults to the directory "
+                       "../simplicity_sdk relative to the script.")
+  args = parser.parse_args()
+
+  args.out.mkdir(exist_ok=True)
+
+  defines = {} 
+  for device, data_sources in devices.items():
+    bits_file = (args.sdk / data_sources["bits"]).resolve()
+    with bits_file.open() as f:
+      for line in f:
+
+        if m := re.match(r"#define (_ACMP_INPUTCTRL_POSSEL_(?!SHIFT)(?!MASK)(?!DEFAULT).*)\s+(\dx[\dABCDEF]+)", line):
+          input_value = hex(int(m.group(2),16))
+          input_name = f"#define ACMP_INPUT_{m.group(1).split('_')[-1]}"
+          # Detect any input definition collisions
+          if (input_value in defines):
+              if ( input_name == defines[input_value] ):
+                  print(f"Inputs {input_name} and {defines[input_value]} share the same value {input_value}.")
+          defines.update({input_value : f"{input_name} {input_value}"})
+
+        if m := re.match(r"#define (_ACMP_INPUTCTRL_NEGSEL_(?!SHIFT)(?!MASK)(?!DEFAULT).*)\s+(\dx[\dABCDEF]+)", line):
+          input_value = hex(int(m.group(2),16))
+          input_name = f"#define ACMP_INPUT_{m.group(1).split('_')[-1]}"
+          # Detect any input definition collisions
+          if (input_value in defines):
+              if ( input_name == defines[input_value] ):
+                  print(f"Inputs {input_name} and {defines[input_value]} share the same value {input_value}.")
+          defines.update({input_value : f"{input_name} {input_value}"})
+
+  # Sort defines by key
+  defines = dict(sorted(defines.items()))
+
+  file = [
+    "/*",
+    f" * Copyright (c) {datetime.date.today().year} Silicon Laboratories Inc.",
+    " *",
+    " * SPDX-License-Identifier: Apache-2.0",
+    " *",
+    f" * This file was generated by the script {Path(__file__).name} in the hal_silabs module.",
+    " * Do not manually edit.",
+    " */",
+    "",
+    f"#ifndef ZEPHYR_INCLUDE_DT_BINDINGS_COMPARATOR_SILABS_ACMP_H_",
+    f"#define ZEPHYR_INCLUDE_DT_BINDINGS_COMPARATOR_SILABS_ACMP_H_",
+    "",
+    f"/* ACMP Input Aliases */",
+    f"#define ACMP_INPUT_VDACOUT0 ACMP_INPUT_VDAC0OUT0",
+    f"#define ACMP_INPUT_VDACOUT1 ACMP_INPUT_VDAC0OUT1",
+    "",
+    f"/* ACMP Input Definitions */",
+  ] + list(defines.values()) + [
+    "",
+    f"#endif /* ZEPHYR_INCLUDE_DT_BINDINGS_COMPARATOR_SILABS_ACMP_H_ */",
+    "",
+  ]
+
+  outfile = args.out / f"silabs-acmp.h"
+  outfile.write_text("\n".join(file))