diff --git a/arch/arm64/configs/tart_defconfig b/arch/arm64/configs/tart_defconfig
index 505dbf5a1..0eff8fb92 100644
--- a/arch/arm64/configs/tart_defconfig
+++ b/arch/arm64/configs/tart_defconfig
@@ -3456,24 +3456,19 @@ CONFIG_B43LEGACY_PIO=n
 CONFIG_B43LEGACY_DMA_AND_PIO_MODE=n
 # CONFIG_B43LEGACY_DMA_MODE is not set
 # CONFIG_B43LEGACY_PIO_MODE is not set
-CONFIG_WLAN_VENDOR_BROADCOM=y
-CONFIG_BRCMUTIL=y
-CONFIG_BRCMSMAC=y
+# Broadcom WLAN disabled entirely. The onboard SYN43711 (AP6611S) SDIO chip is
+# unsupported: mainline brcmfmac lacks a chanspec decoder for its WiFi-6-era
+# firmware (brcmu_d11ac_decchspec WARNs, all channels rejected), and the BSP
+# bcmdhd driver needs a full Rockchip platform port (RFKILL_RK + MMC rescan).
+# WiFi is provided via USB adapters instead (see the MediaTek/Realtek/Ralink/
+# Atheros USB driver sections). Keeping brcmfmac off also guarantees wlan0
+# goes to the USB adapter. Bluetooth (UART/serdev hci_bcm) is unaffected.
+CONFIG_WLAN_VENDOR_BROADCOM=n
+# CONFIG_BRCMUTIL is not set
+# CONFIG_BRCMSMAC is not set
+# CONFIG_BRCMFMAC is not set
 CONFIG_BCMDHD=n
 CONFIG_WL_ROCKCHIP=n
-CONFIG_AP6XXX=y
-#CONFIG_BCMDHD_SDIO=y
-CONFIG_BCMDHD_SDIO=y
-# CONFIG_BCMDHD_FW_PATH is not set
-# CONFIG_BCMDHD_NVRAM_PATH is not set
-CONFIG_BRCMFMAC=y
-CONFIG_BRCMFMAC_PROTO_BCDC=y
-CONFIG_BRCMFMAC_PROTO_MSGBUF=y
-CONFIG_BRCMFMAC_SDIO=y
-CONFIG_BRCMFMAC_USB=y
-CONFIG_BRCMFMAC_PCIE=y
-CONFIG_BRCM_TRACING=y
-CONFIG_BRCMDBG=y
 #CONFIG_WLAN_VENDOR_CISCO=y
 # CONFIG_AIRO is not set
 #CONFIG_WLAN_VENDOR_INTEL=y