i2c: create builtin_i2c_driver to avoid registration boilerplate (c698d639) · Commits · 戴 / test

In commit ("platform_device: better support builtin boilerplate avoidance") we introduced the builtin_driver macro. Here we use that support and extend it to I2C driver registration, so where a driver is clearly non-modular and builtin-only, we can register it in a similar fashion. And existing code that is clearly non-modular can be updated with the simple mapping of module_i2c_driver(...) ---> builtin_i2c_driver(...) We've essentially cloned the former to make the latter, and taken out the remove/module_exit parts since those never get used in a non-modular build of the code. A similar thing was done in commit ("PCI: Add builtin_pci_driver() to avoid registration boilerplate"). Signed-off-by:

Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by:

Wolfram Sang <wsa@the-dreams.de>

include/linux/i2c.h

+12 −1

Original line number	Diff line number	Diff line
		@@ -655,7 +655,7 @@ static inline int i2c_adapter_id(struct i2c_adapter *adap)
		}

		/**
		* module_i2c_driver() - Helper macro for registering a I2C driver
		* module_i2c_driver() - Helper macro for registering a modular I2C driver
		* @__i2c_driver: i2c_driver struct
		*
		* Helper macro for I2C drivers which do not do anything special in module
		@@ -666,6 +666,17 @@ static inline int i2c_adapter_id(struct i2c_adapter *adap)
		module_driver(__i2c_driver, i2c_add_driver, \
		i2c_del_driver)

		/**
		* builtin_i2c_driver() - Helper macro for registering a builtin I2C driver
		* @__i2c_driver: i2c_driver struct
		*
		* Helper macro for I2C drivers which do not do anything special in their
		* init. This eliminates a lot of boilerplate. Each driver may only
		* use this macro once, and calling it replaces device_initcall().
		*/
		#define builtin_i2c_driver(__i2c_driver) \
		builtin_driver(__i2c_driver, i2c_add_driver)

		#endif /* I2C */

		#if IS_ENABLED(CONFIG_OF)

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