Re: Broadcom 43340

[Arend van Spriel <arend@broadcom.com>]

On 03/21/15 21:38, Jürgen Bausa wrote:
> Arend van Spriel<arend@...>  writes:
>
>>
>>
>> CONFIG_BRCM_TRACING is another way to get debug output, but I guess that
>> is not enabled either.
>>
>
> Just found this via google to enable wlan:
>
> 1. the nvram file under /sys/firmware/efi/efivars/ has a wrong MAC address.
> I changed it to the correct one. However, I am not sure if this is really
> necassary.

That MAC address is only used for device that do have mac address in the 
device so you can ignore that one.

> 2. Found the following on the web:
>
>> rmmod brcmfmac
>> rmmod brcmutil
>> echo on>  /sys/bus/platform/drivers/sdhci-acpi/INT33BB\:00/power/control
>> modprobe brcmfmac
>
> After this, I can connect to wlan!

Ah, I was wondering what type of sdio host controller was used. When 
sdio host controller uses runtime-pm it affect communication with wlan 
device. I recently posted a patch for that [1].

> Does this give you enough information to find out, what the problem is? Or
> do you still need DBG output from the driver? if so, just tell me and I will
> try to compile and install the kernel with DBG turnded on. Its not a big
> deal but I stopped working on it as I found this workaround.
>
> At the momment I am trying to put these commands to rc,local. With limited
> success until now, But this may be caused by the fact, that they are
> executed too early. Will add some sleep.

Might be the driver is already loaded before root file system is loaded 
(from initramfs).

> Another thing I found out is, that the system sometimes comes up without
> wlan0. It seems I have it only on every second boot. However, this could be
> just by incident and it is not exactly every second boot but about 50 % of
> all boots.

Is that after reboot or really after powerup. Curious whether there is a 
difference between the two regarding this issue.

Regards,
Arend

[1] https://patchwork.kernel.org/patch/6038511/

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