NXP PCF2127

modulename: rtc-pcf2127.ko

configname: CONFIG_RTC_DRV_PCF2127

Linux Kernel Configuration
└─>Device Drivers
└─>Real Time Clock
└─>NXP PCF2127
In linux kernel since version 3.10 (release Date: 2013-06-30)  
If you say yes here you get support for the NXP PCF2127/29/31 RTC
chips with integrated quartz crystal for industrial applications.
These chips also have watchdog timer and tamper switch detection
features.

PCF2127 has an additional feature of 512 bytes battery backed
memory that's accessible using nvmem interface.

This driver can also be built as a module. If so, the module
will be called rtc-pcf2127.

source code: