Integrated in a Lenovo X230 laptop.
Output of lspci -knn:
02:00.0 System peripheral [0880]: Ricoh Co Ltd PCIe SDXC/MMC Host Controller [1180:e823] (rev 07)
Subsystem: Lenovo Device [17aa:21fa]
Kernel driver in use: sdhci-pci
Kernel modules: sdhci-pci
lspci -nnpk
01:00.0 System peripheral [0880]: Ricoh Co Ltd Device [1180:e823] (rev 07)
lspci -vmmnn
Slot: 01:00.0
Class: System peripheral [0880]
Vendor: Ricoh Co Ltd [1180]
Device: Device [e823]
SVendor: Toshiba America Info Systems [1179]
SDevice: Device [0001]
Rev: 07
ProgIf: 01