ICP DAS LP-8841 SPI Controller for RTC

modulename: spi-lp8841-rtc.ko

configname: CONFIG_SPI_LP8841_RTC

Linux Kernel Configuration
└─>Device Drivers
└─>SPI support
└─>ICP DAS LP-8841 SPI Controller for RTC
In linux kernel since version 4.1 (release Date: 2015-06-21)  
This driver provides an SPI master device to drive Maxim
DS-1302 real time clock.

Say N here unless you plan to run the kernel on an ICP DAS
LP-8x4x industrial computer.

source code:
depends
CONFIG_SPI
CONFIG_SPI_MASTER
CONFIG_COMPILE_TEST or CONFIG_MACH_PXA27X_DT