diff --git a/src/mainboard/google/drallion/variants/drallion/gpio.c b/src/mainboard/google/drallion/variants/drallion/gpio.c
index 5657eeaae1..086dca0265 100644
--- a/src/mainboard/google/drallion/variants/drallion/gpio.c
+++ b/src/mainboard/google/drallion/variants/drallion/gpio.c
@@ -14,6 +14,7 @@
  */
 
 #include <variant/gpio.h>
+#include <variant/variant.h>
 #include <vendorcode/google/chromeos/chromeos.h>
 #include <gpio.h>
 #include <soc/romstage.h>
@@ -274,17 +275,11 @@ const struct cros_gpio *variant_cros_gpios(size_t *num)
 	return cros_gpios;
 }
 
-static int is_ish_device_enabled(void)
-{
-	gpio_input(SENSOR_DET_360);
-	return gpio_get(SENSOR_DET_360) == 0;
-}
-
 void variant_mainboard_post_init_params(FSPM_UPD *mupd)
 {
 	FSP_M_CONFIG *fsp_m_cfg = &mupd->FspmConfig;
 	if (fsp_m_cfg->PchIshEnable)
-		fsp_m_cfg->PchIshEnable = is_ish_device_enabled();
+		fsp_m_cfg->PchIshEnable = has_360_sensor_board();
 
 	/*
 	 * Disable memory channel by HW strap pin, HW default is enable
diff --git a/src/mainboard/google/drallion/variants/drallion/include/variant/variant.h b/src/mainboard/google/drallion/variants/drallion/include/variant/variant.h
index 508654faa5..bf08ec30dc 100644
--- a/src/mainboard/google/drallion/variants/drallion/include/variant/variant.h
+++ b/src/mainboard/google/drallion/variants/drallion/include/variant/variant.h
@@ -16,6 +16,9 @@
 #ifndef VARIANT_H
 #define VARIANT_H
 
+#include <gpio.h>
+#include <variant/gpio.h>
+
 /* Need to update for Drallion with right SKU IDs*/
 typedef struct {
 	int id;
@@ -36,4 +39,10 @@ const static sku_info skus[] = {
 /* Return memory SKU for the variant */
 int variant_memory_sku(void);
 
+/* Check if the device has a 360 sensor board present */
+static inline int has_360_sensor_board(void)
+{
+	return gpio_get(SENSOR_DET_360) == 0;
+}
+
 #endif
diff --git a/src/mainboard/google/drallion/variants/drallion/sku.c b/src/mainboard/google/drallion/variants/drallion/sku.c
index 72776299b0..736a14579a 100644
--- a/src/mainboard/google/drallion/variants/drallion/sku.c
+++ b/src/mainboard/google/drallion/variants/drallion/sku.c
@@ -14,15 +14,13 @@
  */
 
 #include <boardid.h>
-#include <ec/google/wilco/commands.h>
 #include <smbios.h>
+#include <ec/google/wilco/commands.h>
 #include <variant/variant.h>
-#include <gpio.h>
-#include <variant/gpio.h>
 
 static const uint32_t get_sku_index(void)
 {
-	return (gpio_get(SENSOR_DET_360) | (wilco_ec_signed_fw() << 1));
+	return ((!has_360_sensor_board()) | (wilco_ec_signed_fw() << 1));
 }
 
 uint32_t sku_id(void)