CONFIG_MMA9551_CORE (not configurable)

modulename: mma9551_core.ko

configname: CONFIG_MMA9551_CORE

Linux Kernel Configuration
└─>Device Drivers
└─>Industrial I/O support
└─>Accelerometers
└─>MMA9551_CORE
In linux kernel since version 4 (release Date: 2015-04-12)  
source code:
drivers/iio/accel/mma9551_core.c
depends
CONFIG_IIO