SPI slave handler reporting boot up time

modulename: spi-slave-time.ko

configname: CONFIG_SPI_SLAVE_TIME

Linux Kernel Configuration
└─>Device Drivers
└─>SPI support
└─>SPI slave handler reporting boot up time
In linux kernel since version 4.2 (release Date: 2015-08-30)  
SPI slave handler responding with the time of reception of the last
SPI message.

source code:
drivers/spi/spi-slave-time.c