1I2C_ADD_NUMBERED_ADA(9)     I2C and SMBus Subsystem    I2C_ADD_NUMBERED_ADA(9)
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NAME

6       i2c_add_numbered_adapter - declare i2c adapter, use static bus number
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SYNOPSIS

9       int i2c_add_numbered_adapter(struct i2c_adapter * adap);
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ARGUMENTS

12       adap
13           the adapter to register (with adap->nr initialized)
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CONTEXT

16       can sleep
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DESCRIPTION

19       This routine is used to declare an I2C adapter when its bus number
20       matters. For example, use it for I2C adapters from system-on-chip CPUs,
21       or otherwise built in to the system's mainboard, and where
22       i2c_board_info is used to properly configure I2C devices.
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24       If the requested bus number is set to -1, then this function will
25       behave identically to i2c_add_adapter, and will dynamically assign a
26       bus number.
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28       If no devices have pre-been declared for this bus, then be sure to
29       register the adapter before any dynamically allocated ones. Otherwise
30       the required bus ID may not be available.
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32       When this returns zero, the specified adapter became available for
33       clients using the bus number provided in adap->nr. Also, the table of
34       I2C devices pre-declared using i2c_register_board_info is scanned, and
35       the appropriate driver model device nodes are created. Otherwise, a
36       negative errno value is returned.
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39Kernel Hackers Manual 3.10         June 2019           I2C_ADD_NUMBERED_ADA(9)
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