diff --git a/src/mainboard/google/brya/variants/craask/include/variant/ec.h b/src/mainboard/google/brya/variants/craask/include/variant/ec.h
index 7a2a6ff8b7..dac67ca295 100644
--- a/src/mainboard/google/brya/variants/craask/include/variant/ec.h
+++ b/src/mainboard/google/brya/variants/craask/include/variant/ec.h
@@ -5,4 +5,9 @@
 
 #include <baseboard/ec.h>
 
+/* Enable Tablet switch for Windows drivers */
+#if !CONFIG(CHROMEOS)
+#define EC_ENABLE_TBMC_DEVICE
+#endif
+
 #endif
diff --git a/src/mainboard/google/brya/variants/craaskov/include/variant/ec.h b/src/mainboard/google/brya/variants/craaskov/include/variant/ec.h
index 7a2a6ff8b7..dac67ca295 100644
--- a/src/mainboard/google/brya/variants/craaskov/include/variant/ec.h
+++ b/src/mainboard/google/brya/variants/craaskov/include/variant/ec.h
@@ -5,4 +5,9 @@
 
 #include <baseboard/ec.h>
 
+/* Enable Tablet switch for Windows drivers */
+#if !CONFIG(CHROMEOS)
+#define EC_ENABLE_TBMC_DEVICE
+#endif
+
 #endif
diff --git a/src/mainboard/google/brya/variants/crota/include/variant/ec.h b/src/mainboard/google/brya/variants/crota/include/variant/ec.h
index 7a2a6ff8b7..dac67ca295 100644
--- a/src/mainboard/google/brya/variants/crota/include/variant/ec.h
+++ b/src/mainboard/google/brya/variants/crota/include/variant/ec.h
@@ -5,4 +5,9 @@
 
 #include <baseboard/ec.h>
 
+/* Enable Tablet switch for Windows drivers */
+#if !CONFIG(CHROMEOS)
+#define EC_ENABLE_TBMC_DEVICE
+#endif
+
 #endif
diff --git a/src/mainboard/google/brya/variants/dochi/include/variant/ec.h b/src/mainboard/google/brya/variants/dochi/include/variant/ec.h
index 6f104d5da4..74b96179aa 100644
--- a/src/mainboard/google/brya/variants/dochi/include/variant/ec.h
+++ b/src/mainboard/google/brya/variants/dochi/include/variant/ec.h
@@ -8,4 +8,9 @@
 /* Enable EC backed Keyboard Backlight in ACPI */
 #define EC_ENABLE_KEYBOARD_BACKLIGHT
 
+/* Enable Tablet switch for Windows drivers */
+#if !CONFIG(CHROMEOS)
+#define EC_ENABLE_TBMC_DEVICE
+#endif
+
 #endif
diff --git a/src/mainboard/google/brya/variants/felwinter/include/variant/ec.h b/src/mainboard/google/brya/variants/felwinter/include/variant/ec.h
index 7a2a6ff8b7..dac67ca295 100644
--- a/src/mainboard/google/brya/variants/felwinter/include/variant/ec.h
+++ b/src/mainboard/google/brya/variants/felwinter/include/variant/ec.h
@@ -5,4 +5,9 @@
 
 #include <baseboard/ec.h>
 
+/* Enable Tablet switch for Windows drivers */
+#if !CONFIG(CHROMEOS)
+#define EC_ENABLE_TBMC_DEVICE
+#endif
+
 #endif
diff --git a/src/mainboard/google/brya/variants/gimble/include/variant/ec.h b/src/mainboard/google/brya/variants/gimble/include/variant/ec.h
index 7a2a6ff8b7..dac67ca295 100644
--- a/src/mainboard/google/brya/variants/gimble/include/variant/ec.h
+++ b/src/mainboard/google/brya/variants/gimble/include/variant/ec.h
@@ -5,4 +5,9 @@
 
 #include <baseboard/ec.h>
 
+/* Enable Tablet switch for Windows drivers */
+#if !CONFIG(CHROMEOS)
+#define EC_ENABLE_TBMC_DEVICE
+#endif
+
 #endif
diff --git a/src/mainboard/google/brya/variants/gimble4es/include/variant/ec.h b/src/mainboard/google/brya/variants/gimble4es/include/variant/ec.h
index 7a2a6ff8b7..dac67ca295 100644
--- a/src/mainboard/google/brya/variants/gimble4es/include/variant/ec.h
+++ b/src/mainboard/google/brya/variants/gimble4es/include/variant/ec.h
@@ -5,4 +5,9 @@
 
 #include <baseboard/ec.h>
 
+/* Enable Tablet switch for Windows drivers */
+#if !CONFIG(CHROMEOS)
+#define EC_ENABLE_TBMC_DEVICE
+#endif
+
 #endif
diff --git a/src/mainboard/google/brya/variants/gothrax/include/variant/ec.h b/src/mainboard/google/brya/variants/gothrax/include/variant/ec.h
index 7a2a6ff8b7..dac67ca295 100644
--- a/src/mainboard/google/brya/variants/gothrax/include/variant/ec.h
+++ b/src/mainboard/google/brya/variants/gothrax/include/variant/ec.h
@@ -5,4 +5,9 @@
 
 #include <baseboard/ec.h>
 
+/* Enable Tablet switch for Windows drivers */
+#if !CONFIG(CHROMEOS)
+#define EC_ENABLE_TBMC_DEVICE
+#endif
+
 #endif
diff --git a/src/mainboard/google/brya/variants/joxer/include/variant/ec.h b/src/mainboard/google/brya/variants/joxer/include/variant/ec.h
index 7a2a6ff8b7..dac67ca295 100644
--- a/src/mainboard/google/brya/variants/joxer/include/variant/ec.h
+++ b/src/mainboard/google/brya/variants/joxer/include/variant/ec.h
@@ -5,4 +5,9 @@
 
 #include <baseboard/ec.h>
 
+/* Enable Tablet switch for Windows drivers */
+#if !CONFIG(CHROMEOS)
+#define EC_ENABLE_TBMC_DEVICE
+#endif
+
 #endif
diff --git a/src/mainboard/google/brya/variants/kaladin/include/variant/ec.h b/src/mainboard/google/brya/variants/kaladin/include/variant/ec.h
index 6f104d5da4..74b96179aa 100644
--- a/src/mainboard/google/brya/variants/kaladin/include/variant/ec.h
+++ b/src/mainboard/google/brya/variants/kaladin/include/variant/ec.h
@@ -8,4 +8,9 @@
 /* Enable EC backed Keyboard Backlight in ACPI */
 #define EC_ENABLE_KEYBOARD_BACKLIGHT
 
+/* Enable Tablet switch for Windows drivers */
+#if !CONFIG(CHROMEOS)
+#define EC_ENABLE_TBMC_DEVICE
+#endif
+
 #endif
diff --git a/src/mainboard/google/brya/variants/kano/include/variant/ec.h b/src/mainboard/google/brya/variants/kano/include/variant/ec.h
index 6f104d5da4..74b96179aa 100644
--- a/src/mainboard/google/brya/variants/kano/include/variant/ec.h
+++ b/src/mainboard/google/brya/variants/kano/include/variant/ec.h
@@ -8,4 +8,9 @@
 /* Enable EC backed Keyboard Backlight in ACPI */
 #define EC_ENABLE_KEYBOARD_BACKLIGHT
 
+/* Enable Tablet switch for Windows drivers */
+#if !CONFIG(CHROMEOS)
+#define EC_ENABLE_TBMC_DEVICE
+#endif
+
 #endif
diff --git a/src/mainboard/google/brya/variants/mithrax/include/variant/ec.h b/src/mainboard/google/brya/variants/mithrax/include/variant/ec.h
index 7a2a6ff8b7..dac67ca295 100644
--- a/src/mainboard/google/brya/variants/mithrax/include/variant/ec.h
+++ b/src/mainboard/google/brya/variants/mithrax/include/variant/ec.h
@@ -5,4 +5,9 @@
 
 #include <baseboard/ec.h>
 
+/* Enable Tablet switch for Windows drivers */
+#if !CONFIG(CHROMEOS)
+#define EC_ENABLE_TBMC_DEVICE
+#endif
+
 #endif
diff --git a/src/mainboard/google/brya/variants/pujjo/include/variant/ec.h b/src/mainboard/google/brya/variants/pujjo/include/variant/ec.h
index 7a2a6ff8b7..dac67ca295 100644
--- a/src/mainboard/google/brya/variants/pujjo/include/variant/ec.h
+++ b/src/mainboard/google/brya/variants/pujjo/include/variant/ec.h
@@ -5,4 +5,9 @@
 
 #include <baseboard/ec.h>
 
+/* Enable Tablet switch for Windows drivers */
+#if !CONFIG(CHROMEOS)
+#define EC_ENABLE_TBMC_DEVICE
+#endif
+
 #endif
diff --git a/src/mainboard/google/brya/variants/pujjoga/include/variant/ec.h b/src/mainboard/google/brya/variants/pujjoga/include/variant/ec.h
index 7a2a6ff8b7..dac67ca295 100644
--- a/src/mainboard/google/brya/variants/pujjoga/include/variant/ec.h
+++ b/src/mainboard/google/brya/variants/pujjoga/include/variant/ec.h
@@ -5,4 +5,9 @@
 
 #include <baseboard/ec.h>
 
+/* Enable Tablet switch for Windows drivers */
+#if !CONFIG(CHROMEOS)
+#define EC_ENABLE_TBMC_DEVICE
+#endif
+
 #endif
diff --git a/src/mainboard/google/brya/variants/pujjolo/include/variant/ec.h b/src/mainboard/google/brya/variants/pujjolo/include/variant/ec.h
index 7a2a6ff8b7..dac67ca295 100644
--- a/src/mainboard/google/brya/variants/pujjolo/include/variant/ec.h
+++ b/src/mainboard/google/brya/variants/pujjolo/include/variant/ec.h
@@ -5,4 +5,9 @@
 
 #include <baseboard/ec.h>
 
+/* Enable Tablet switch for Windows drivers */
+#if !CONFIG(CHROMEOS)
+#define EC_ENABLE_TBMC_DEVICE
+#endif
+
 #endif
diff --git a/src/mainboard/google/brya/variants/pujjoniru/include/variant/ec.h b/src/mainboard/google/brya/variants/pujjoniru/include/variant/ec.h
index 7a2a6ff8b7..dac67ca295 100644
--- a/src/mainboard/google/brya/variants/pujjoniru/include/variant/ec.h
+++ b/src/mainboard/google/brya/variants/pujjoniru/include/variant/ec.h
@@ -5,4 +5,9 @@
 
 #include <baseboard/ec.h>
 
+/* Enable Tablet switch for Windows drivers */
+#if !CONFIG(CHROMEOS)
+#define EC_ENABLE_TBMC_DEVICE
+#endif
+
 #endif
diff --git a/src/mainboard/google/brya/variants/redrix/include/variant/ec.h b/src/mainboard/google/brya/variants/redrix/include/variant/ec.h
index ea8fb54830..18716e4f50 100644
--- a/src/mainboard/google/brya/variants/redrix/include/variant/ec.h
+++ b/src/mainboard/google/brya/variants/redrix/include/variant/ec.h
@@ -23,4 +23,9 @@
 /* Enable EC backed Keyboard Backlight in ACPI */
 #define EC_ENABLE_KEYBOARD_BACKLIGHT
 
+/* Enable Tablet switch for Windows drivers */
+#if !CONFIG(CHROMEOS)
+#define EC_ENABLE_TBMC_DEVICE
+#endif
+
 #endif
diff --git a/src/mainboard/google/brya/variants/redrix4es/include/variant/ec.h b/src/mainboard/google/brya/variants/redrix4es/include/variant/ec.h
index d390746036..3034eef15a 100644
--- a/src/mainboard/google/brya/variants/redrix4es/include/variant/ec.h
+++ b/src/mainboard/google/brya/variants/redrix4es/include/variant/ec.h
@@ -44,4 +44,9 @@
 /* Enable EC backed Keyboard Backlight in ACPI */
 #define EC_ENABLE_KEYBOARD_BACKLIGHT
 
+/* Enable Tablet switch for Windows drivers */
+#if !CONFIG(CHROMEOS)
+#define EC_ENABLE_TBMC_DEVICE
+#endif
+
 #endif
diff --git a/src/mainboard/google/brya/variants/riven/include/variant/ec.h b/src/mainboard/google/brya/variants/riven/include/variant/ec.h
index 7a2a6ff8b7..dac67ca295 100644
--- a/src/mainboard/google/brya/variants/riven/include/variant/ec.h
+++ b/src/mainboard/google/brya/variants/riven/include/variant/ec.h
@@ -5,4 +5,9 @@
 
 #include <baseboard/ec.h>
 
+/* Enable Tablet switch for Windows drivers */
+#if !CONFIG(CHROMEOS)
+#define EC_ENABLE_TBMC_DEVICE
+#endif
+
 #endif
diff --git a/src/mainboard/google/brya/variants/taeko/include/variant/ec.h b/src/mainboard/google/brya/variants/taeko/include/variant/ec.h
index 7a2a6ff8b7..dac67ca295 100644
--- a/src/mainboard/google/brya/variants/taeko/include/variant/ec.h
+++ b/src/mainboard/google/brya/variants/taeko/include/variant/ec.h
@@ -5,4 +5,9 @@
 
 #include <baseboard/ec.h>
 
+/* Enable Tablet switch for Windows drivers */
+#if !CONFIG(CHROMEOS)
+#define EC_ENABLE_TBMC_DEVICE
+#endif
+
 #endif
diff --git a/src/mainboard/google/brya/variants/taeko4es/include/variant/ec.h b/src/mainboard/google/brya/variants/taeko4es/include/variant/ec.h
index 7a2a6ff8b7..dac67ca295 100644
--- a/src/mainboard/google/brya/variants/taeko4es/include/variant/ec.h
+++ b/src/mainboard/google/brya/variants/taeko4es/include/variant/ec.h
@@ -5,4 +5,9 @@
 
 #include <baseboard/ec.h>
 
+/* Enable Tablet switch for Windows drivers */
+#if !CONFIG(CHROMEOS)
+#define EC_ENABLE_TBMC_DEVICE
+#endif
+
 #endif
diff --git a/src/mainboard/google/brya/variants/xivu/include/variant/ec.h b/src/mainboard/google/brya/variants/xivu/include/variant/ec.h
index 7a2a6ff8b7..dac67ca295 100644
--- a/src/mainboard/google/brya/variants/xivu/include/variant/ec.h
+++ b/src/mainboard/google/brya/variants/xivu/include/variant/ec.h
@@ -5,4 +5,9 @@
 
 #include <baseboard/ec.h>
 
+/* Enable Tablet switch for Windows drivers */
+#if !CONFIG(CHROMEOS)
+#define EC_ENABLE_TBMC_DEVICE
+#endif
+
 #endif