Promisuous mode

[lrf8682004]

Dr sir,
Does the driver support promisuous mode？And How can i replace the default wlan driver in nexus4？
I run tcpdump in nexus with default driver. Although dmesg shows that wlan0 enter promisuous mode，no packet between other client in Ap can be capture. I guess it is the driver does not support the modr. SO How about yours?thx