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Date: Fri, 30 Jan 2015 15:40:12 +0100
From: Arend van Spriel <arend@broadcom.com>
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Subject: Re: "brcmfmac: brcmf_sdio_htclk: HT Avail timeout" on Thinkpad Tablet
 10
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On 01/28/15 08:15, Sébastien Bourdeauducq wrote:
> Hi,
>
> The Lenovo Thinkpad Tablet 10 is a complete disaster under Linux, and
> among many problems the SDIO brcmfmac wifi does not work.
>
> I get the following messages in the kernel log:
> brcmfmac: brcmf_sdio_drivestrengthinit: No SDIO Drive strength init done
> for chip 4324 rev 6 pmurev 17
> brcmfmac: brcmf_sdio_htclk: HT Avail timeout (1000000): clkctl 0x50
> [repeated]
>
> and the network interface is never created.
>
> I'm running kernel 3.18.4, my brcmfmac43241b4-sdio.bin is identical to
> the one in the linux-firmware repository, and I have attached the
> brcmfmac43241b4-sdio.txt that I have extracted from the EFI variables.

When you say your firmware is identical what does that mean. Did you do 
a diff? Can you do 'hexdump -C brcmfmac43241b4-sdio.bin | tail -30'? I 
will be getting a laptop with 43241 integrated soonish (monday?). 
Hopefully it has same chip revision.

Regards,
Arend
> Any help would be appreciated.
>
> Sébastien