Lenovo L420 has builtin SD card reader Realtek 5209. There is a driver for it made by Realtek.com available at:
Device is identified by:
none1@pci0:4:0:0: class=0xff0000 card=0x21dd17aa chip=0x520910ec rev=0x01 hdr=0x00
vendor = 'Realtek Semiconductor Co., Ltd.'
Mark suspended awaiting someone to do the porting work.
OpenBSD now has a driver for this chip:
See bug #204521 for a porting request for OpenBSD's rtsx(4).
For bugs matching the following conditions:
- Status == In Progress
- Assignee == "bugs@FreeBSD.org"
- Last Modified Year <= 2017
- Set Status to "Open"
*** This bug has been marked as a duplicate of bug 204521 ***