Re: Broadcom 43340

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

On 03/15/15 21:38, Jürgen Bausa wrote:
> Arend van Spriel<arend@...>  writes:
>
>>
>> On 03/14/15 23:13, Ochal Christophe wrote:
>>> All,
>>>
>>> On 03/14/2015 09:39 PM, Stefan Lippers-Hollmann wrote:
>>>> You don't need to run windows for that, the nvram (calibration data,
>>>> probably the MAC address and related device specific data) is stored
>>>> in your mainboard's firmware - and exposed to userspace (under linux)
>>>> via /sys/firmware/efi/efivars/. You just need to identify the correct
>>>> file and copy it to a place where linux expects to find it
>>>> (/lib/firmware/brcm/brcmfmac43340-sdio.txt). Regards Stefan
>>>> Lippers-Hollmann
>>>
>>> Thanks for the hint, that did it, I'm online!
>>
>> Apparently my hint was not clear enough. Good to hear it works for you.
>>
>
> Dear Arend,
>
> would be nice, if you could make it clear.
>
> I am in the exact some position (asus x205 with linux 4.0 rc3) but my
> /sys/firmware/efi/efivars/ is empty. I am running debian jessie with a
> kernel taken from ubuntu. Am I missing something? Even loading efivars via
> modprobe doesnt change a thing.

Maybe you need to mount it. This is what I found [1]:

$ sudo mount -t efivarfs none /sys/firmware/efi/efivars

Regards,
Arend

[1] http://firmware.intel.com/blog/accessing-uefi-variables-linux

> Juergen
>
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