Rockchip RK805/RK808/RK818 Power Management Chip

modulename: rk808.ko

configname: CONFIG_MFD_RK808

Linux Kernel Configuration
└─>Device Drivers
└─>Multifunction device drivers
└─>Device Tree and Open Firmware support
└─>Rockchip RK805/RK808/RK818 Power Management Chip
In linux kernel since version 3.10 (release Date: 2013-06-30)  
If you say yes here you get support for the RK805, RK808 and RK818
Power Management chips.
This driver provides common support for accessing the device
through I2C interface. The device supports multiple sub-devices
including interrupts, RTC, LDO & DCDC regulators, and onkey.

source code: