Rockchip RK806 Power Management Chip

modulename: rk8xx-spi.ko

configname: CONFIG_MFD_RK8XX_SPI

Linux Kernel Configuration
└─>Device Drivers
└─>Multifunction device drivers
└─>SPI support
└─>Device Tree and Open Firmware support
└─>Rockchip RK806 Power Management Chip
In linux kernel since version 6.5 (release Date: 2023-08-27)  
If you say yes here you get support for the RK806 Power Management
chip.
This driver provides common support for accessing the device
through an SPI interface. The device supports multiple sub-devices
including interrupts, LDO & DCDC regulators, and power on-key.

source code: