I2C_REGISTER_BOARD_I - Online Linux Manual Page

Section : 9
Updated : June 2018
Source : Kernel Hackers Manual 2​.6​.
Note : I2C and SMBus Subsystem
NAMEi2c_register_board_info − statically declare I2C devices
SYNOPSISint i2c_register_board_info(int busnum, struct i2c_board_info const * info, unsigned len);
ARGUMENTSbusnum identifies the bus to which these devices belong info vector of i2c device descriptors len how many descriptors in the vector; may be zero to reserve the specified bus number​.
DESCRIPTIONSystems using the Linux I2C driver stack can declare tables of board info while they initialize​. This should be done in board−specific init code near arch_initcall time, or equivalent, before any I2C adapter driver is registered​. For example, mainboard init code could define several devices, as could the init code for each daughtercard in a board stack​. The I2C devices will be created later, after the adapter for the relevant bus has been registered​. After that moment, standard driver model tools are used to bind ‟new style” I2C drivers to the devices​. The bus number for any device declared using this routine is not available for dynamic allocation​. The board info passed can safely be __initdata, but be careful of embedded pointers (for platform_data, functions, etc) since that won´t be copied​.
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