platform: re-enable HAS_BUILTIN_HRM capability

platform/platform_capabilities.py

@@ -184,7 +184,7 @@
         {
             'HAS_ACCESSORY_CONNECTOR',
             'HAS_APP_GLANCES',
-            # 'HAS_BUILTIN_HRM', -- TODO: disabled because driver was removed
+            # 'HAS_BUILTIN_HRM', -- disabled by default
             'HAS_CORE_NAVIGATION4',
             'HAS_HEALTH_TRACKING',
             'HAS_JAVASCRIPT',
@@ -209,7 +209,7 @@
             'COMPOSITOR_USES_DMA',
             'HAS_ACCESSORY_CONNECTOR',
             'HAS_APP_GLANCES',
-            # 'HAS_BUILTIN_HRM', -- TODO: disabled because driver was removed
+            # 'HAS_BUILTIN_HRM', -- disabled by default
             'HAS_CORE_NAVIGATION4',
             'HAS_GLYPH_BITMAP_CACHING',
             'HAS_HEALTH_TRACKING',
@@ -323,6 +323,10 @@ def get_capability_dict(ctx, board):
     if ctx.env.NOJS:
         capabilities_of_board.discard('HAS_JAVASCRIPT')
 
+    if ctx.env.SILK_HR:
+        # Enable builtin HRM for Silk
+        capabilities_of_board.add('HAS_BUILTIN_HRM')
+
     # End overrides section
 
     false_capabilities = master_capability_set - capabilities_of_board

platform/wscript

@@ -149,7 +149,12 @@ def has_touch(ctx):
 
 @conf
 def get_hrm(ctx):
-    return None
+    if is_robert(ctx):
+        return "AS7000"
+    elif is_silk(ctx):
+        return "AS7000"
+    else:
+        return None
 
 
 @conf