Driver I2C problems-general Linux technology-Linux technology and application information, the following is a detailed description. I recently learned the i2c device driver. When registering the driver, I need to match the registered device. If the matching succeeds, I will jump to the probe function defined by the driver;
Later, I checked that i2c devices put them in a linked list through the i2c_register_board_info function and register these devices during bus initialization;
What I don't understand here is that I didn't see the connection between the device and the adaper (adapter). How is the connection? Besides, I registered many adaper in the kernel, how do we tell the adapter that our device is connected? I have read the i2c_register_board_info function. There is a parameter that indicates the bus number. Does this bus number correspond to an adaper? When is the I2C device file generated?
In the driver, sometimes a miscellaneous device is registered through the misc_register () function. What is the role of this function?
Also, when looking at drivers written by others, there are two statements: client-> driver = & i2c_ts_driver; i2c_set_clientdata (client, ts); the i2c device has been registered, I don't understand what these two commands mean?
I am a newbie. Could you please give me some advice?
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