Realtek 8821CS SDIO wireless network adapter

modulename: rtw88_8821cs.ko

configname: CONFIG_RTW88_8821CS

Linux Kernel Configuration
└─>Device Drivers
└─>Network device support
└─>Wireless LAN
└─>Realtek 802.11ac wireless chips support
└─>Realtek 8821CS SDIO wireless network adapter
In linux kernel since version 6.4 (release Date: 2023-06-25)  
Select this option will enable support for 8821CS chipset

802.11ac SDIO wireless network adapter

source code:
drivers/net/wireless/realtek/rtw88/