diff --git a/board/rowan/board.c b/board/rowan/board.c
index 046e1e848d..f6ba2147cf 100644
--- a/board/rowan/board.c
+++ b/board/rowan/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"
@@ -17,6 +18,7 @@
 #include "console.h"
 #include "driver/accel_kionix.h"
 #include "driver/accel_kx022.h"
+#include "driver/als_isl29035.h"
 #include "driver/tcpm/anx7688.h"
 #include "driver/tcpm/tcpci.h"
 #include "driver/temp_sensor/tmp432.h"
@@ -474,6 +476,12 @@ static void board_chipset_suspend(void)
 }
 DECLARE_HOOK(HOOK_CHIPSET_SUSPEND, board_chipset_suspend, HOOK_PRIO_DEFAULT);
 
+/* ALS instances. Must be in same order as enum als_id. */
+struct als_t als[] = {
+	{"ISL", isl29035_init, isl29035_read_lux, 5},
+};
+BUILD_ASSERT(ARRAY_SIZE(als) == ALS_COUNT);
+
 #ifdef HAS_TASK_MOTIONSENSE
 /* Motion sensors */
 /* Mutexes */
diff --git a/board/rowan/board.h b/board/rowan/board.h
index b4b688880b..dcd422fc99 100644
--- a/board/rowan/board.h
+++ b/board/rowan/board.h
@@ -16,8 +16,10 @@
 
 /* Accelero meter and gyro sensor */
 #define CONFIG_ACCEL_KX022
+#define CONFIG_ALS_ISL29035
 #define CONFIG_CMD_ACCELS
 #define CONFIG_CMD_ACCEL_INFO
+#define CONFIG_CMD_ALS
 #define CONFIG_LID_ANGLE
 #define CONFIG_LID_ANGLE_SENSOR_BASE 0
 #define CONFIG_LID_ANGLE_SENSOR_LID 1
@@ -135,6 +137,7 @@
 /* 2 I2C master ports, connect to battery, charger, pd and USB switches */
 #define I2C_PORT_MASTER  0
 #define I2C_PORT_ACCEL   0
+#define I2C_PORT_ALS     0
 #define I2C_PORT_BATTERY 0
 #define I2C_PORT_CHARGER 0
 #define I2C_PORT_PERICOM 0
@@ -193,6 +196,13 @@ enum temp_sensor_id {
 	TEMP_SENSOR_COUNT
 };
 
+/* Light sensors attached to the EC. */
+enum als_id {
+	ALS_ISL29035 = 0,
+
+	ALS_COUNT,
+};
+
 /* TODO: determine the following board specific type-C power constants */
 /*
  * delay to turn on the power supply max is ~16ms.
diff --git a/board/rowan/ec.tasklist b/board/rowan/ec.tasklist
index 1f2782dc9d..672efd1a23 100644
--- a/board/rowan/ec.tasklist
+++ b/board/rowan/ec.tasklist
@@ -26,4 +26,5 @@
 	TASK_ALWAYS(HOSTCMD, host_command_task, NULL, LARGER_TASK_STACK_SIZE) \
 	TASK_ALWAYS(CONSOLE, console_task, NULL, LARGER_TASK_STACK_SIZE) \
 	TASK_NOTEST(MOTIONSENSE, motion_sense_task, NULL, TASK_STACK_SIZE) \
-	TASK_ALWAYS(PD_C0, pd_task, NULL, LARGER_TASK_STACK_SIZE)
+	TASK_ALWAYS(PD_C0, pd_task, NULL, LARGER_TASK_STACK_SIZE) \
+	TASK_ALWAYS(ALS, als_task, NULL, TASK_STACK_SIZE)