diff --git a/board/oak/board.c b/board/oak/board.c
index f9166b7b15..33a7bec316 100644
--- a/board/oak/board.c
+++ b/board/oak/board.c
@@ -7,6 +7,7 @@
 
 #include "adc.h"
 #include "adc_chip.h"
+#include "als.h"
 #include "atomic.h"
 #include "battery.h"
 #include "charge_manager.h"
@@ -15,6 +16,7 @@
 #include "chipset.h"
 #include "common.h"
 #include "console.h"
+#include "driver/als_opt3001.h"
 #include "driver/temp_sensor/tmp432.h"
 #include "extpower.h"
 #include "gpio.h"
@@ -134,6 +136,12 @@ const struct temp_sensor_t temp_sensors[] = {
 };
 BUILD_ASSERT(ARRAY_SIZE(temp_sensors) == TEMP_SENSOR_COUNT);
 
+/* ALS instances. Must be in same order as enum als_id. */
+struct als_t als[] = {
+	{"TI", opt3001_init, opt3001_read_lux, 5},
+};
+BUILD_ASSERT(ARRAY_SIZE(als) == ALS_COUNT);
+
 /* Thermal limits for each temp sensor. All temps are in degrees K. Must be in
  * same order as enum temp_sensor_id. To always ignore any temp, use 0.
  */
diff --git a/board/oak/board.h b/board/oak/board.h
index 6b366d96c1..6336ba16ad 100644
--- a/board/oak/board.h
+++ b/board/oak/board.h
@@ -13,6 +13,12 @@
 
 #define CONFIG_ADC
 #undef  CONFIG_ADC_WATCHDOG
+
+/* Add for Ambient Light Sensor */
+#define CONFIG_ALS
+#define CONFIG_ALS_OPT3001
+#define CONFIG_CMD_ALS
+
 /* Add for AC adaptor, charger, battery */
 #define CONFIG_BATTERY_CUT_OFF
 #define CONFIG_BATTERY_PRESENT_GPIO GPIO_BAT_PRESENT_L
@@ -134,6 +140,10 @@
 #define I2C_PORT_PD_MCU 1
 #define I2C_PORT_USB_MUX 1
 #define I2C_PORT_TCPC 1
+#define I2C_PORT_ALS   I2C_PORT_MASTER
+
+/* Ambient Light Sensor address */
+#define OPT3001_I2C_ADDR OPT3001_I2C_ADDR1
 
 /* Timer selection */
 #define TIM_CLOCK32 2
@@ -182,6 +192,13 @@ enum temp_sensor_id {
 	TEMP_SENSOR_COUNT
 };
 
+/* Light sensors */
+enum als_id {
+	ALS_OPT3001 = 0,
+
+	ALS_COUNT
+};
+
 /* start as a sink in case we have no other power supply/battery */
 #define PD_DEFAULT_STATE PD_STATE_SNK_DISCONNECTED
 
diff --git a/board/oak/ec.tasklist b/board/oak/ec.tasklist
index 3bf87257bf..45cb276099 100644
--- a/board/oak/ec.tasklist
+++ b/board/oak/ec.tasklist
@@ -26,6 +26,7 @@
 #define CONFIG_TASK_LIST \
 	TASK_ALWAYS(HOOKS, hook_task, NULL, LARGER_TASK_STACK_SIZE) \
 	TASK_VBUS(VBUS, vbus_task, NULL, TASK_STACK_SIZE) \
+	TASK_ALWAYS(ALS, als_task, NULL, TASK_STACK_SIZE) \
 	TASK_ALWAYS(USB_CHG_P0, usb_charger_task, NULL, TASK_STACK_SIZE) \
 	TASK_ALWAYS(USB_CHG_P1, usb_charger_task, NULL, TASK_STACK_SIZE) \
 	TASK_ALWAYS(CHARGER, charger_task, NULL, LARGER_TASK_STACK_SIZE) \