I2C_NEW_DEVICE(9) I2C and SMBus Subsystem I2C_NEW_DEVICE(9)NAME
i2c_new_device - instantiate an i2c device
struct i2c_client * i2c_new_device(struct i2c_adapter * adap, struct i2c_board_info const * info);
the adapter managing the device
describes one I2C device; bus_num is ignored
Create an i2c device. Binding is handled through driver model probe/remove methods. A driver may be bound to this device when we return
from this function, or any later moment (e.g. maybe hotplugging will load the driver module). This call is not appropriate for use by
mainboard initialization logic, which usually runs during an arch_initcall long before any i2c_adapter could exist.
This returns the new i2c client, which may be saved for later use with i2c_unregister_device; or NULL to indicate an error.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 I2C_NEW_DEVICE(9)
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I2C_REGISTER_BOARD_I(9) I2C and SMBus Subsystem I2C_REGISTER_BOARD_I(9)NAME
i2c_register_board_info - statically declare I2C devices
int i2c_register_board_info(int busnum, struct i2c_board_info const * info, unsigned len);
identifies the bus to which these devices belong
vector of i2c device descriptors
how many descriptors in the vector; may be zero to reserve the specified bus number.
Systems 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
COPYRIGHT Kernel Hackers Manual 2.6. July 2010 I2C_REGISTER_BOARD_I(9)
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