Kernel Menu Configuration

Follow the steps below to enter the kernel menu to enable the kernel configuration for WiFi.
  1. Under the root directory of devkits, type the following command to enter the kernel menu configuration GUI. 
    make linux-menuconfig
  2. Enter the Device Drivers menu option.
    Figure 1. Device Drivers
  3. Enter the Network device support menu option.
    Figure 2. Network device support
  4. Enter Wireless LAN menu option.
    Figure 3. Wireless LAN
  5. Choose Broadcom FullMAC wireless cards support option.
    Figure 4. Broadcom FullMAC wireless cards support
    Note: Pressing Y to compile it into kernel while pressing M to compile as module. The following lists are the description of some options in the menu.
    • Firmware path is the firmware storage path while the NVRAM path is the NVRAM configuration file path, which can be selected according to needs.
    • debug message: Choose this option to add debugging information for loading drivers in the kernel.
    • Enable Chip Interface: This is used to select the WiFi interface. In this example, SDIO is used as the WiFi interface. The following figure shows the options under Enable Chip Interface:
      Figure 5. Enable Chip Interface
    • Interrupt type: This is used to choose the wake interrupt.
      Figure 6. Interrupt type
      • Out-of-Band Interrupt: The BCM chip defines an Out of Band (OOB) interrupt, also known as WL_ HOST_ WAKE pin, and you can remap the interrupt signal to this pin.
      • In-Band Interrupt: In the SDIO protocol, the DATA1 line of the SDIO card can be used as an interrupt line, called In-Band Interrupt.
  6. Enable CFG80211 and remove CONFIG_BRCMFMAC: 
    CONFIG_CFG80211=y
# CONFIG_BRCMFMAC is not set
    Figure 7. CFG80211-Wireless configuration API
  7. Save your change before you exit the kernel configuration dialog.