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[solved] modprobe: unknown symbol i2c_bit_add_bus
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Rudolf Polzer
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PostPosted: Fri Jan 24, 2014 11:56 am    Post subject: [solved] modprobe: unknown symbol i2c_bit_add_bus Reply with quote

I am trying to use the driver for TBS6982. Modprobe causes the following error message in dmesg:
saa716x_tbs_dvb: Unknown symbol i2c_bit_add_bus (err 0)
Now I am searching for a kernel config setting to include this symbol, but can't find any appropriate.
My kernel version is 3.10.17.


Last edited by Rudolf Polzer on Sun Jan 26, 2014 9:47 pm; edited 1 time in total
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massimo
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PostPosted: Fri Jan 24, 2014 12:04 pm    Post subject: Reply with quote

Look for I2C_ALGOBIT.
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Rudolf Polzer
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PostPosted: Fri Jan 24, 2014 12:08 pm    Post subject: Reply with quote

I2C_ALGOBIT is not in my .config file.
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massimo
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PostPosted: Fri Jan 24, 2014 12:11 pm    Post subject: Reply with quote

Code:

Symbol: I2C_ALGOBIT [=m]                                                                                                   
Type  : tristate                                                                                                           
Prompt: I2C bit-banging interfaces                                                                                         
  Defined at drivers/i2c/algos/Kconfig:8                                                                                   
  Depends on: I2C [=m] && !I2C_HELPER_AUTO [=n]                                                                           
  Location:                                                                                                               
    -> Device Drivers                                                                                                     
      -> I2C support (I2C [=m])                                                                                           
(1)     -> I2C Algorithms                                                                                                 
  Selected by: CAN_PEAK_PCIEC [=n] && NET [=y] && CAN [=n] && CAN_SJA1000 [=n] && CAN_PEAK_PCI [=n] || SFC [=n] && NETDEVIC

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Rudolf Polzer
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PostPosted: Fri Jan 24, 2014 12:15 pm    Post subject: Reply with quote

Within "I2C support", the entry "I2C Algorithms" does not exist, only "I2C Algorithm debugging messages", which I have already selected, but without success.
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massimo
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PostPosted: Fri Jan 24, 2014 12:19 pm    Post subject: Reply with quote

There deselect Autoselect pertinent helper modules.
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Rudolf Polzer
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PostPosted: Fri Jan 24, 2014 12:34 pm    Post subject: Reply with quote

I was now able to select "I2C Algorithms".
But after compiling the kernel and booting, there is no change - still the same error message.
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Rudolf Polzer
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PostPosted: Fri Jan 24, 2014 2:02 pm    Post subject: Reply with quote

I solved it:
I2C Algorithms has to be a module and must not be built into the kernel.
No idea why...

Thank you, massimo!
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