RFC: Attempt To Recognize Raspberry Pi Running Non-Raspbian OS

adafruit_platformdetect/board.py

@@ -1,5 +1,6 @@
 """Detect boards."""
 import os
+import re
 import adafruit_platformdetect.chip as ap_chip
 
 # Allow for aligned constant definitions:
@@ -367,6 +368,30 @@ def _pi_id(self):
             for model, codes in _PI_REV_CODES.items():
                 if pi_rev_code in codes:
                     return model
+
+        # We may be on a non-Raspbian OS, so try to lazily determine
+        # the version based on `get_device_model`
+        else:
+            pi_model = self.detector.get_device_model()
+            if pi_model:
+                pi_model = pi_model.upper().replace(' ', '_')
+                if "PLUS" in pi_model:
+                    re_model = re.search(r'(RASPBERRY_PI_\d).*([AB]_*)(PLUS)',
+                                         pi_model)
+                elif "CM" in pi_model: # untested for Compute Module
+                    re_model = re.search(r'(RASPBERRY_PI_CM)(\d)',
+                                         pi_model)
+                else: # untested for non-plus models
+                    re_model = re.search(r'(RASPBERRY_PI_\d).*([AB]_*)',
+                                         pi_model)
+
+                if re_model:
+                    pi_model = "".join(re_model.groups())
+                    available_models = _PI_REV_CODES.keys()
+                    for model in available_models:
+                        if model == pi_model:
+                            return model
+
         return None
 
     def _pi_rev_code(self):

adafruit_platformdetect/chip.py

@@ -25,6 +25,9 @@
 MIPS24KC = "MIPS24KC"
 MIPS24KEC = "MIPS24KEC"
 
+BCM_RANGE = {'BCM2708', 'BCM2709', 'BCM2835', 'BCM2837', 'bcm2708', 'bcm2709',
+             'bcm2835', 'bcm2837'}
+
 class Chip:
     """Attempt detection of current chip / CPU."""
     def __init__(self, detector):
@@ -61,13 +64,13 @@ def id(self): # pylint: disable=invalid-name,too-many-branches,too-many-return-s
             return BINHO
 
         platform = sys.platform
-        if platform == "linux" or platform == "linux2":
+        if platform in ('linux', 'linux2'):
             return self._linux_id()
-        if platform == "esp8266":
+        if platform == 'esp8266':
             return ESP8266
-        if platform == "samd21":
+        if platform == 'samd21':
             return SAMD21
-        if platform == "pyboard":
+        if platform == 'pyboard':
             return STM32
         # nothing found!
         return None
@@ -76,18 +79,18 @@ def id(self): # pylint: disable=invalid-name,too-many-branches,too-many-return-s
     def _linux_id(self): # pylint: disable=too-many-branches
         """Attempt to detect the CPU on a computer running the Linux kernel."""
 
-        if self.detector.check_dt_compatible_value("qcom,apq8016"):
+        if self.detector.check_dt_compatible_value('qcom,apq8016'):
             return APQ8016
 
-        if self.detector.check_dt_compatible_value("fu500"):
+        if self.detector.check_dt_compatible_value('fu500'):
             return HFU540
 
         linux_id = None
-        hardware = self.detector.get_cpuinfo_field("Hardware")
+        hardware = self.detector.get_cpuinfo_field('Hardware')
 
         if hardware is None:
-            vendor_id = self.detector.get_cpuinfo_field("vendor_id")
-            if vendor_id in ("GenuineIntel", "AuthenticAMD"):
+            vendor_id = self.detector.get_cpuinfo_field('vendor_id')
+            if vendor_id in ('GenuineIntel', 'AuthenticAMD'):
                 linux_id = GENERIC_X86
 
             compatible = self.detector.get_device_compatible()
@@ -112,20 +115,34 @@ def _linux_id(self): # pylint: disable=too-many-branches
                 elif "MIPS 24KEc" in cpu_model:
                     linux_id = MIPS24KEC
 
-        elif hardware in ("BCM2708", "BCM2709", "BCM2835"):
-            linux_id = BCM2XXX
-        elif "AM33XX" in hardware:
-            linux_id = AM33XX
-        elif "sun8i" in hardware:
-            linux_id = SUN8I
-        elif "ODROIDC" in hardware:
-            linux_id = S805
-        elif "ODROID-C2" in hardware:
-            linux_id = S905
-        elif "ODROID-N2" in hardware:
-            linux_id = S922X
-        elif "SAMA5" in hardware:
-            linux_id = SAMA5
+            # we still haven't identified the hardware, so
+            # convert it to a list and let the remaining
+            # conditions attempt.
+            if not linux_id:
+                hardware = [
+                    entry.replace('\x00', '') for entry in compatible.split(',')
+                ]
+
+        if not linux_id:
+            if 'AM33XX' in hardware:
+                linux_id = AM33XX
+            elif 'sun8i' in hardware:
+                linux_id = SUN8I
+            elif 'ODROIDC' in hardware:
+                linux_id = S805
+            elif 'ODROID-C2' in hardware:
+                linux_id = S905
+            elif 'ODROID-N2' in hardware:
+                linux_id = S922X
+            elif 'SAMA5' in hardware:
+                linux_id = SAMA5
+            else:
+                if isinstance(hardware, str):
+                    if hardware in BCM_RANGE:
+                        linux_id = BCM2XXX
+                elif isinstance(hardware, list):
+                    if set(hardware) & BCM_RANGE:
+                        linux_id = BCM2XXX
 
         return linux_id