Subdirectory for PCMCIA devices when CONFIG_PCMCIA
is set at kernel compilation time.
/proc/bus/pccard/drivers
/proc/bus/pci/
Contains various bus subdirectories and pseudo-files containing
information about PCI buses, installed devices, and device drivers. Some
of these files are not ASCII.
/proc/bus/pci/devices
Information about PCI devices. They may be accessed through
lspci(8) and setpci(8).