1*384cc80fSJohnson TsaiWhat: /sys/class/ieee80211/phyX/rtw89_usb/serial_number 2*384cc80fSJohnson TsaiDate: May 2026 3*384cc80fSJohnson TsaiContact: Johnson Tsai <wenjie.tsai@realtek.com>, linux-wireless@vger.kernel.org 4*384cc80fSJohnson TsaiDescription: (Read) Serial number burned into EFUSE of the RTL8852CU-based 5*384cc80fSJohnson Tsai USB Wi-Fi adapter. Only present on devices that set the 6*384cc80fSJohnson Tsai RTW89_QUIRK_HW_INFO_SYSFS quirk (currently VID 0x28de / 7*384cc80fSJohnson Tsai PID 0x2432). 8*384cc80fSJohnson Tsai 9*384cc80fSJohnson Tsai Format: %10phN (5 raw bytes printed as 10 lowercase hex 10*384cc80fSJohnson Tsai digits, no separators). 11*384cc80fSJohnson Tsai 12*384cc80fSJohnson Tsai Example: 3642000123 13*384cc80fSJohnson Tsai 14*384cc80fSJohnson TsaiWhat: /sys/class/ieee80211/phyX/rtw89_usb/uuid 15*384cc80fSJohnson TsaiDate: May 2026 16*384cc80fSJohnson TsaiContact: Johnson Tsai <wenjie.tsai@realtek.com>, linux-wireless@vger.kernel.org 17*384cc80fSJohnson TsaiDescription: (Read) UUID burned into EFUSE of the RTL8852CU-based USB Wi-Fi 18*384cc80fSJohnson Tsai adapter. Only present on devices that set the 19*384cc80fSJohnson Tsai RTW89_QUIRK_HW_INFO_SYSFS quirk (currently VID 0x28de / 20*384cc80fSJohnson Tsai PID 0x2432). 21*384cc80fSJohnson Tsai 22*384cc80fSJohnson Tsai Format: %pUb (RFC 4122 UUID in lowercase with hyphens). 23*384cc80fSJohnson Tsai 24*384cc80fSJohnson Tsai Example: aaec2b7c-0a55-4727-8de0-b30febccbbaa 25