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我加载WIFI模块成功后，
用 wpa_supplicant -B -i wlan0 -c /etc/wpa_supplicant.conf -D nl80211
输出日志后
nl80211: use P2P_DEVICE support
nl80211: interface wlan0 in phy phy1
nl80211: Set mode ifindex 3 iftype 2 (STATION)
nl80211: Subscribe to mgmt frames with non-AP handle 0x90bf8
nl80211: Register frame type=0xd0 (WLAN_FC_STYPE_ACTION) nl_handle=0x90bf8 match=06
nl80211: Register frame type=0xd0 (WLAN_FC_STYPE_ACTION) nl_handle=0x90bf8 match=0a07
nl80211: Register frame type=0xd0 (WLAN_FC_STYPE_ACTION) nl_handle=0x90bf8 match=0a11
nl80211: Register frame type=0xd0 (WLAN_FC_STYPE_ACTION) nl_handle=0x90bf8 match=1101
nl80211: Register frame type=0xd0 (WLAN_FC_STYPE_ACTION) nl_handle=0x90bf8 match=1102
nl80211: Register frame type=0xd0 (WLAN_FC_STYPE_ACTION) nl_handle=0x90bf8 match=0505
nl80211: Register frame type=0xd0 (WLAN_FC_STYPE_ACTION) nl_handle=0x90bf8 match=0500
rfkill: Cannot open RFKILL control device
nl80211: RFKILL status not available
netlink: Operstate: ifindex=3 linkmode=1 (userspace-control), operstate=5 (IF_OPER_DORMANT)
Add interface wlan0 to a new radio phy1
nl80211: Regulatory information - country=00
这里会有一个 RFKILL ，这个是什么来的

rfkill 是管理无线设备的框架，一般需要在设备树添加控制设备使能引脚的GPIO后才能使用，我们对其了解有限且该部分不属于技术支持范围，建议查看更权威的资料进一步了解