diff --git a/src/mainboard/google/brya/variants/baseboard/nissa/include/baseboard/dirks/ec.h b/src/mainboard/google/brya/variants/baseboard/nissa/include/baseboard/dirks/ec.h
new file mode 100644
index 0000000000..d9697d7c3c
--- /dev/null
+++ b/src/mainboard/google/brya/variants/baseboard/nissa/include/baseboard/dirks/ec.h
@@ -0,0 +1,44 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#ifndef __BASEBOARD_EC_H__
+#define __BASEBOARD_EC_H__
+
+#include <ec/ec.h>
+#include <ec/google/chromeec/ec_commands.h>
+#include <baseboard/gpio.h>
+
+#define MAINBOARD_EC_SCI_EVENTS \
+	(EC_HOST_EVENT_MASK(EC_HOST_EVENT_THERMAL_THRESHOLD) |\
+	 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_MKBP)              |\
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_PD_MCU)            |\
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_USB_MUX))
+#define MAINBOARD_EC_SMI_EVENTS 0
+/* EC can wake from S5 with power button */
+#define MAINBOARD_EC_S5_WAKE_EVENTS \
+	(EC_HOST_EVENT_MASK(EC_HOST_EVENT_POWER_BUTTON))
+/* EC can wake from S3 with power button */
+#define MAINBOARD_EC_S3_WAKE_EVENTS (MAINBOARD_EC_S5_WAKE_EVENTS)
+#define MAINBOARD_EC_S0IX_WAKE_EVENTS \
+	(MAINBOARD_EC_S3_WAKE_EVENTS |\
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_USB_MUX)          |\
+	 EC_HOST_EVENT_MASK(EC_HOST_EVENT_HANG_DETECT))
+/* 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_PANIC))
+/*
+ * ACPI related definitions for ASL code.
+ */
+/* Enable cros_ec_keyb device */
+#define EC_ENABLE_MKBP_DEVICE
+#define EC_ENABLE_WAKE_PIN      GPE_EC_WAKE
+/* Enable EC backed PD MCU device in ACPI */
+#define EC_ENABLE_PD_MCU_DEVICE
+#define SIO_EC_MEMMAP_ENABLE     /* EC Memory Map Resources */
+#define SIO_EC_HOST_ENABLE       /* EC Host Interface Resources */
+
+#define EC_ENABLE_SYNC_IRQ       /* Enable tight timestamp support */
+
+#endif /* __BASEBOARD_EC_H__ */
diff --git a/src/mainboard/google/brya/variants/dirks/include/variant/ec.h b/src/mainboard/google/brya/variants/dirks/include/variant/ec.h
index 7a2a6ff8b7..469e75c834 100644
--- a/src/mainboard/google/brya/variants/dirks/include/variant/ec.h
+++ b/src/mainboard/google/brya/variants/dirks/include/variant/ec.h
@@ -3,6 +3,6 @@
 #ifndef __VARIANT_EC_H__
 #define __VARIANT_EC_H__
 
-#include <baseboard/ec.h>
+#include <baseboard/dirks/ec.h>
 
 #endif