2005-04-16 16:20:36 -06:00
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#
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# Makefile for the i2c core.
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#
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i2c: Add i2c_board_info and i2c_new_device()
This provides partial support for new-style I2C driver binding. It builds
on "struct i2c_board_info" declarations that identify I2C devices on a given
board. This is needed on systems with I2C devices that can't be fully probed
and/or autoconfigured, such as many embedded Linux configurations where the
way a given I2C device is wired may affect how it must be used.
There are two models for declaring such devices:
* LATE -- using a public function i2c_new_device(). This lets modules
declare I2C devices found *AFTER* a given I2C adapter becomes available.
For example, a PCI card could create adapters giving access to utility
chips on that card, and this would be used to associate those chips with
those adapters.
* EARLY -- from arch_initcall() level code, using a non-exported function
i2c_register_board_info(). This copies the declarations *BEFORE* such
an i2c_adapter becomes available, arranging that i2c_new_device() will
be called later when i2c-core registers the relevant i2c_adapter.
For example, arch/.../.../board-*.c files would declare the I2C devices
along with their platform data, and I2C devices would behave much like
PNPACPI devices. (That is, both enumerate from board-specific tables.)
To match the exported i2c_new_device(), the previously-private function
i2c_unregister_device() is now exported.
Pending later patches using these new APIs, this is effectively a NOP.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2007-05-01 15:26:31 -06:00
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obj-$(CONFIG_I2C_BOARDINFO) += i2c-boardinfo.o
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2010-03-02 04:23:43 -07:00
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obj-$(CONFIG_I2C) += i2c-core.o
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obj-$(CONFIG_I2C_SMBUS) += i2c-smbus.o
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2005-04-16 16:20:36 -06:00
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obj-$(CONFIG_I2C_CHARDEV) += i2c-dev.o
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2010-08-11 10:21:02 -06:00
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obj-$(CONFIG_I2C_MUX) += i2c-mux.o
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2010-08-11 10:21:03 -06:00
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obj-y += algos/ busses/ muxes/
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2005-04-16 16:20:36 -06:00
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2010-10-24 10:16:58 -06:00
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ccflags-$(CONFIG_I2C_DEBUG_CORE) := -DDEBUG
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