config MTK_CAM_CAL bool "MTK camera cal driver" default n help CONFIG_MTK_CAM_CAL define if the camera cal driver should be built in or not. If you want to use EEPROM for sensor. You have enable CONFIG_MTK_CAM_CAL on ProjectConfig. The kernel space for EEPROM will be build. It may be like as "/dev/CAM_CAL_DRV". Use space code will control the driver by open and ioctrl this one.