Use the sys-apps/pciutils library for PCI info

Packages describing “pci” as local USE flag

Package “pci” Flag Description
sys-apps/cpu-x Use the sys-apps/pciutils library for PCI info
sys-apps/superiotool Support for PCI-attached "Super I/Os" (e.g. in VIA VT82686A/B).
net-analyzer/net-snmp Use libpci (from sys-apps/pciutils) to look up network interface description. This feature is only available on Linux.
sys-apps/hwloc Enable PCI device discovery using libpci
app-emulation/vice Enable PCI device discovery using sys-apps/pciutils
app-misc/ddccontrol enable direct PCI memory access (the setuid ddcpci util)

All packages providing a “pci” USE flag (2)