Realtek PCI-E card reader

modulename: rtsx_pci.ko

configname: CONFIG_MISC_RTSX_PCI

Linux Kernel Configuration
└─>Device Drivers
└─>Misc devices
└─>Realtek PCI-E card reader
In linux kernel since version 3.10 (release Date: 2013-06-30)  
This supports for Realtek PCI-Express card reader including rts5209,
rts5227, rts522A, rts5229, rts5249, rts524A, rts525A, rtl8411, rts5260.
Realtek card readers support access to many types of memory cards,
such as Memory Stick, Memory Stick Pro, Secure Digital and
MultiMediaCard.

source code:
selects
CONFIG_MFD_CORE

depends
CONFIG_PCI