Add support for specifying BOARD in info.json (#11492)

* add support for specifying BOARD in info.json

* move BOARD from rules.mk to info.json for clueboard

* fix keyboards that do not require board

* remove out of compliance values

2 files changed, 10 insertions, 2 deletions

diff --git a/lib/python/qmk/cli/generate/rules_mk.py b/lib/python/qmk/cli/generate/rules_mk.py
index 0fdccb4048..b262e3c666 100755
--- a/lib/python/qmk/cli/generate/rules_mk.py
+++ b/lib/python/qmk/cli/generate/rules_mk.py
@@ -7,6 +7,7 @@ from qmk.info import info_json
 from qmk.path import is_keyboard, normpath
 
 info_to_rules = {
+    'board': 'BOARD',
     'bootloader': 'BOOTLOADER',
     'processor': 'MCU',
 }
@@ -37,7 +38,8 @@ def generate_rules_mk(cli):
 
     # Bring in settings
     for info_key, rule_key in info_to_rules.items():
-        rules_mk_lines.append(f'{rule_key} ?= {kb_info_json[info_key]}')
+        if info_key in kb_info_json:
+            rules_mk_lines.append(f'{rule_key} ?= {kb_info_json[info_key]}')
 
     # Find features that should be enabled
     if 'features' in kb_info_json:
diff --git a/lib/python/qmk/info.py b/lib/python/qmk/info.py
index 0ea5136a97..cc81f7a086 100644
--- a/lib/python/qmk/info.py
+++ b/lib/python/qmk/info.py
@@ -462,7 +462,7 @@ def _extract_rules_mk(info_data):
     """Pull some keyboard information from existing rules.mk files
     """
     rules = rules_mk(info_data['keyboard_folder'])
-    mcu = rules.get('MCU')
+    mcu = rules.get('MCU', info_data.get('processor'))
 
     if mcu in CHIBIOS_PROCESSORS:
         arm_processor_rules(info_data, rules)
@@ -594,6 +594,12 @@ def arm_processor_rules(info_data, rules):
     elif 'ARM_ATSAM' in rules:
         info_data['platform'] = 'ARM_ATSAM'
 
+    if 'BOARD' in rules:
+        if 'board' in info_data:
+            _log_warning(info_data, 'Board is specified in both info.json and rules.mk, the rules.mk value wins.')
+
+        info_data['board'] = rules['BOARD']
+
     return info_data