diff --git a/src/mainboard/google/reef/variants/sand/include/variant/ec.h b/src/mainboard/google/reef/variants/sand/include/variant/ec.h
index 94424e1064..80cf80673f 100644
--- a/src/mainboard/google/reef/variants/sand/include/variant/ec.h
+++ b/src/mainboard/google/reef/variants/sand/include/variant/ec.h
@@ -13,5 +13,65 @@
  * GNU General Public License for more details.
  */
 
-/* Use the one from baseboard for now */
-#include <baseboard/ec.h>
+#ifndef BASEBOARD_EC_H
+#define BASEBOARD_EC_H
+
+#include <variant/gpio.h>
+#include <ec/google/chromeec/ec_commands.h>
+
+#define MAINBOARD_EC_SCI_EVENTS \
+	(EC_HOST_EVENT_MASK(EC_HOST_EVENT_LID_CLOSED)        |\
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_LID_OPEN)          |\
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_AC_CONNECTED)      |\
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_AC_DISCONNECTED)   |\
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_BATTERY_LOW)       |\
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_BATTERY_CRITICAL)  |\
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_BATTERY)           |\
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_BATTERY_STATUS)    |\
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_THERMAL_THRESHOLD) |\
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_THERMAL_OVERLOAD)  |\
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_THROTTLE_START)    |\
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_THROTTLE_STOP)     |\
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_USB_CHARGER)       |\
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_MKBP)              |\
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_PD_MCU))
+
+#define MAINBOARD_EC_SMI_EVENTS \
+	(EC_HOST_EVENT_MASK(EC_HOST_EVENT_LID_CLOSED))
+
+/* EC can wake from S5 with lid or power button */
+#define MAINBOARD_EC_S5_WAKE_EVENTS \
+	(EC_HOST_EVENT_MASK(EC_HOST_EVENT_LID_OPEN)     |\
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_POWER_BUTTON))
+
+/* EC can wake from S3 with lid or power button or key press */
+#define MAINBOARD_EC_S3_WAKE_EVENTS \
+	(MAINBOARD_EC_S5_WAKE_EVENTS |\
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_KEY_PRESSED))
+
+/* Log EC wake events plus EC shutdown events */
+#define MAINBOARD_EC_LOG_EVENTS \
+	(EC_HOST_EVENT_MASK(EC_HOST_EVENT_THERMAL_SHUTDOWN) |\
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_BATTERY_SHUTDOWN)|\
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_PANIC))
+
+/*
+ * ACPI related definitions for ASL code.
+ */
+
+/* Enable EC backed ALS device in ACPI */
+#define EC_ENABLE_ALS_DEVICE
+
+/* Enable EC backed PD MCU device in ACPI */
+#define EC_ENABLE_PD_MCU_DEVICE
+
+/* Enable LID switch and provide wake pin for EC */
+#define EC_ENABLE_LID_SWITCH
+#define EC_ENABLE_WAKE_PIN	GPE_EC_WAKE
+
+
+#define SIO_EC_MEMMAP_ENABLE     /* EC Memory Map Resources */
+#define SIO_EC_HOST_ENABLE       /* EC Host Interface Resources */
+#define SIO_EC_ENABLE_PS2K       /* Enable PS/2 Keyboard */
+
+#endif