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authorPaul Gortmaker <paul.gortmaker@windriver.com>2015-12-13 15:33:19 -0500
committerWolfram Sang <wsa@the-dreams.de>2016-01-13 11:06:03 +0100
commitc698d639f72b55686ec3518d2bc8dc5f2eca9354 (patch)
tree02bd142f283819860018ec64910bf9c441d8df66 /include/linux/i2c.h
parentc55281531282930de0aace46b2d6b22653937818 (diff)
downloadlwn-c698d639f72b55686ec3518d2bc8dc5f2eca9354.tar.gz
lwn-c698d639f72b55686ec3518d2bc8dc5f2eca9354.zip
i2c: create builtin_i2c_driver to avoid registration boilerplate
In commit f309d4443130bf814e991f836e919dca22df37ae ("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 b4eb6cdbbd13698704863f680c643c569909e1c2 ("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>
Diffstat (limited to 'include/linux/i2c.h')
-rw-r--r--include/linux/i2c.h13
1 files changed, 12 insertions, 1 deletions
diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index bc2b19ad9357..200cf13b00f6 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -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)