--- zzzz-none-000/linux-3.10.107/arch/arm/configs/ixp4xx_defconfig	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/arm/configs/ixp4xx_defconfig	2021-02-04 17:41:59.000000000 +0000
@@ -169,7 +169,6 @@
 CONFIG_WATCHDOG=y
 CONFIG_IXP4XX_WATCHDOG=y
 CONFIG_USB=y
-CONFIG_USB_DEVICEFS=y
 # CONFIG_USB_DEVICE_CLASS is not set
 CONFIG_USB_EHCI_HCD=y
 CONFIG_USB_OHCI_HCD=y
@@ -203,3 +202,4 @@
 CONFIG_DEBUG_KERNEL=y
 CONFIG_DEBUG_ERRORS=y
 CONFIG_DEBUG_LL=y
+CONFIG_DEBUG_LL_UART_8250=y