/sys/bus/nvmem/devices/*/nvmem (sysfs interface)

configname: CONFIG_NVMEM_SYSFS

Linux Kernel Configuration
└─>Device Drivers
└─>NVMEM Support
└─>/sys/bus/nvmem/devices/*/nvmem (sysfs interface)
In linux kernel since version 4.14.326 (release Date: 2023-09-23)  
Say Y here to add a sysfs interface for NVMEM.

This interface is mostly used by userspace applications to
read/write directly into nvmem.