> ./bt_info -p BT_INFO_TRACE
Device to open: /dev/btp96
Value of BT_INFO_TRACE is 28676 (0x7004)

> ./bt_info -p BT_INFO_TRACE -v 24580
Device to open: /dev/btp96
BT_INFO_TRACE was set to 0x6004.

> ./bt_info -p BT_INFO_TRACE
Device to open: /dev/btp96
Value of BT_INFO_TRACE is 24580 (0x6004)