Couldn't find reference for i2c_smbus functinos

Couldn't find reference for i2c_smbus functinos

[Sachin Rane]

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Hi,
 
Following text is from "/usr/local/linux/Doumentation/dev-interface":
----------------------------------------------------------------------------------------------------------------------------------
You can do SMBus level transactions (see documentation file smbus-protocol
for details) through the following functions:
  __s32 i2c_smbus_write_quick(int file, __u8 value);
  __s32 i2c_smbus_read_byte(int file);
  __s32 i2c_smbus_write_byte(int file, __u8 value);
  __s32 i2c_smbus_read_byte_data(int file, __u8 command);
  __s32 i2c_smbus_write_byte_data(int file, __u8 command, __u8 value);
  __s32 i2c_smbus_read_word_data(int file, __u8 command);
  __s32 i2c_smbus_write_word_data(int file, __u8 command, __u16 value);
  __s32 i2c_smbus_process_call(int file, __u8 command, __u16 value);
  __s32 i2c_smbus_read_block_data(int file, __u8 command, __u8 *values);
  __s32 i2c_smbus_write_block_data(int file, __u8 command, __u8 length,
                                   __u8 *values);
---------------------------------------------------------------------------------------
 
I searched in the 2.6.13 version of Timesys and Suse linux, but I didn't find definition or declaration in file '/usr/include/linux/i2c-dev.h' and '/usr/include/linux/i2c.h'.
 
Am I missing any information about the location of the above functions?
Do I need to implement the above functions?
 
Thanks and Regards,
Sachin Rane
 

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RE: Couldn't find reference for i2c_smbus functinos

[Jenkins, Clive]

> You can do SMBus level transactions (see documentation file
smbus-protocol
> for details) through the following functions:
>   __s32 i2c_smbus_write_quick(int file, __u8 value);
> ...
> Am I missing any information about the location of the above
functions?

Try reading
http://www.lm-sensors.org/browser/i2c/trunk/doc/dev-interface
and other material on the lm-sensors site

> Do I need to implement the above functions?

No.

Re: Couldn't find reference for i2c_smbus functinos

[Eugene Surovegin]

On Wed, Sep 20, 2006 at 11:07:52AM -0400, Sachin Rane wrote:
> Hi,
>  
> Following text is from "/usr/local/linux/Doumentation/dev-interface":
> ----------------------------------------------------------------------------------------------------------------------------------
> You can do SMBus level transactions (see documentation file smbus-protocol
> for details) through the following functions:
>   __s32 i2c_smbus_write_quick(int file, __u8 value);
>   __s32 i2c_smbus_read_byte(int file);
>   __s32 i2c_smbus_write_byte(int file, __u8 value);
>   __s32 i2c_smbus_read_byte_data(int file, __u8 command);
>   __s32 i2c_smbus_write_byte_data(int file, __u8 command, __u8 value);
>   __s32 i2c_smbus_read_word_data(int file, __u8 command);
>   __s32 i2c_smbus_write_word_data(int file, __u8 command, __u16 value);
>   __s32 i2c_smbus_process_call(int file, __u8 command, __u16 value);
>   __s32 i2c_smbus_read_block_data(int file, __u8 command, __u8 *values);
>   __s32 i2c_smbus_write_block_data(int file, __u8 command, __u8 length,
>                                    __u8 *values);
> ---------------------------------------------------------------------------------------
>  
> I searched in the 2.6.13 version of Timesys and Suse linux, but I 
> didn't find definition or declaration in file 
> '/usr/include/linux/i2c-dev.h' and '/usr/include/linux/i2c.h'.

Please, look for this functions in the kernel source tree, not in 
user-space headers.

-- 
Eugene