the above is on Dell Latitude 5490 with RTS525A card reader.
xubuntu@xubuntu:~$ lspci -v
[..]
01:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS525A PCI
Express Card Reader (rev 01)
Subsystem: Dell RTS525A PCI Express Card Reader
Flags: bus master, fast devsel, latency 0, IRQ 125
Memory at ef100000 (32-bit, non-prefetchable) [size=4K]
Capabilities: <access denied>
Kernel driver in use: rtsx_pci
Kernel modules: rtsx_pci
and the relevant "lshw" section:
*-generic
description: Unassigned class
product: RTS525A PCI Express Card Reader
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:01:00.0
version: 01
width: 32 bits
clock: 33MHz
capabilities: bus_master cap_list
configuration: driver=rtsx_pci latency=0
resources: irq:125 memory:ef100000-ef100fff
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https://bugs.launchpad.net/bugs/1810416
Title:
SD card error mmc0: error -110 whilst initialising SD card
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