Realtek PCI-E card reader

modulename: rtsx_pci.ko

configname: CONFIG_MFD_RTSX_PCI

Linux Kernel Configuration
└─>Device Drivers
└─>Multifunction device drivers
└─>Realtek PCI-E card reader
In linux kernel since version 3.1 (release Date: 2011-10-24)  
This supports for Realtek PCI-Express card reader including rts5209,
rts5229, rtl8411, etc. Realtek card reader supports access to many
types of memory cards, such as Memory Stick, Memory Stick Pro,
Secure Digital and MultiMediaCard.

source code: