On Friday, September 9, 2016 at 1:15:42 PM UTC-7, RobertCNelson wrote:On Fri, Sep 9, 2016 at 2:45 PM, Stephane Charette
<stephane...@gmail.com> wrote:
> When I first plug power into my BBGW, everything works great. But if I
> issue a "reboot" or "shutdown -r now" command, when the device boots back up
> I have no wifi.
>
> Anyone else having problems with wifi not working when doing a "warm"
> reboot? Is this a known problem, or is there a known workaround?
I still don't think we are properly resetting the wl18xx on startup.
(in u-boot is the easiest place)
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./update_kernel.sh --lts-4_4 --ti-channel
and
~/dtb-rebuilder$ make ; sudo make install
both took, I've rebooted and confirmed kernel version has changed:
~$ uname -a
Linux beaglebone 4.4.22-ti-r48 #1 SMP Tue Sep 27 22:40:34 UTC 2016 armv7l GNU/Linux
currently Wifi module is not being recognized, no wlcore statements in dmesg, just one error that seems related:
mmc2: error -5 whilst initialising SDIO card
...
(the old way)
dtb=am335x-bonegreen-wireless.dtb
(the led-on way (this is the method we've been testing this week))
dtb=am335x-bonegreen-wireless-led-hack.dtb
When I first plug power into my BBGW, everything works great. But if I issue a "reboot" or "shutdown -r now" command, when the device boots back up I have no wifi.
I believe we have found the root cause for the BBGW wifi related issues.Bottom line is that BT_AUD_OUT from wl1835 has to be pulled low when WL_EN is activated.in case it isn't, wilink8 ends up in one of the test modes that introduces various issues (elp wakeup timeouts etc.)On the BBGW this pin is routed through the level shifter (U21) that introduces a pullup on the line and wilink8 ends up in a bad state.To work around this, I have used a gpio hog to force this pin low.An alternative may be adding an external pulldown on U21 pin 4 but this would require an ECO.Please see section 10.4 in the following document:You can see that AUD_OUT_BT has to be 0 when BT or WLAN enable bit is set to high.BR,Eyal
--
Stéphane
For more options, visit http://beagleboard.org/discuss
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