default or selected kernelversion does not have config value CONFIG_CARDBUS.
Result is shown for kernelversion 6.9.9
32-bit CardBus support
configname: CONFIG_CARDBUS
Linux Kernel Configuration
└─>Device Drivers
└─>PCCard (PCMCIA/CardBus) support
└─>PCI support
└─>32-bit CardBus support
In linux kernel since version 3.10 (release Date: 2013-06-30)
CardBus is a bus mastering architecture for PC-cards, which allows
for 32 bit PC-cards (the original PCMCIA standard specifies only
a 16 bit wide bus). Many newer PC-cards are actually CardBus cards.
To use 32 bit PC-cards, you also need a CardBus compatible host
bridge. Virtually all modern PCMCIA bridges do this, and most of
them are "yenta-compatible", so say Y or M there, too.
If unsure, say Y.
for 32 bit PC-cards (the original PCMCIA standard specifies only
a 16 bit wide bus). Many newer PC-cards are actually CardBus cards.
To use 32 bit PC-cards, you also need a CardBus compatible host
bridge. Virtually all modern PCMCIA bridges do this, and most of
them are "yenta-compatible", so say Y or M there, too.
If unsure, say Y.