Unable to activate wifi on Linux

[smouton]

Hello everyone
I installed Ubuntu distribution from Pine64 site.
Everything worked fine until I tried to get wifi running: I'm unable to activate it

• ifconfig only displays eth0 and lo
  
• lsmod shows that cfg80211 is there
  

In addition dmesg returns a strange message about power:

Code:

dmesg |grep wlan
[    8.267425] sunxi-wlan wlan.26: wlan_busnum (1)
[    8.272474] sunxi-wlan wlan.26: Missing wlan_power.
[    8.277918] sunxi-wlan wlan.26: wlan_power_name ((null))
[    8.283839] sunxi-wlan wlan.26: io_regulator_name (vcc-wifi-io)
[    8.290464] sunxi-wlan wlan.26: wlan_regon gpio=354  mul-sel=1  pull=-1  drv_level=-1  data=0
[    8.300002] sunxi-wlan wlan.26: wlan_hostwake gpio=355  mul-sel=6  pull=-1  drv_level=-1  data=0
[    8.309821] sunxi-wlan wlan.26: clk not config
[   13.706002] sunxi-wlan wlan.26: bus_index: 1
[   13.716752] sunxi-wlan wlan.26: check wlan io_regulator voltage: 1800000
[   14.103278] RTL871X: rtw_ndev_init(wlan0)
[   14.104519] RTL871X: rtw_ndev_init(wlan1)

Any idea of what I could check (or where I went wrong)?

Best Regards