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of/device: Add OF style matching helper function 

Add of_driver_match_device() helper function.  This function can be used
by bus types to determine if a driver works with a device when using OF
style matching.  If CONFIG_OF is unselected, then it is a nop.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
CC: Greg Kroah-Hartman <gregkh@suse.de>
CC: Michal Simek <monstr@monstr.eu>
CC: Grant Likely <grant.likely@secretlab.ca>
CC: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: Stephen Rothwell <sfr@canb.auug.org.au>
CC: linux-kernel@vger.kernel.org
CC: microblaze-uclinux@itee.uq.edu.au
CC: linuxppc-dev@ozlabs.org
CC: devicetree-discuss@lists.ozlabs.org
This commit is contained in:
Grant Likely 2010-06-08 07:48:17 -06:00
parent 2e13cba8dc
commit 8cec0e7b4c
2 changed files with 20 additions and 1 deletions
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2
drivers/of/device.c
View File

@ -20,7 +20,7 @@
const struct of_device_id *of_match_device(const struct of_device_id *matches,
const struct device *dev)
{
if (!dev->of_node)
if ((!matches) || (!dev->of_node))
return NULL;
return of_match_node(matches, dev->of_node);
}

19
include/linux/of_device.h
View File

@ -30,6 +30,17 @@
extern const struct of_device_id *of_match_device(
const struct of_device_id *matches, const struct device *dev);
/**
* of_driver_match_device - Tell if a driver's of_match_table matches a device.
* @drv: the device_driver structure to test
* @dev: the device structure to match against
*/
static inline int of_driver_match_device(const struct device *dev,
const struct device_driver *drv)
{
return of_match_device(drv->of_match_table, dev) != NULL;
}
extern struct of_device *of_dev_get(struct of_device *dev);
extern void of_dev_put(struct of_device *dev);
@ -48,6 +59,14 @@ extern ssize_t of_device_get_modalias(struct device *dev,
extern int of_device_uevent(struct device *dev, struct kobj_uevent_env *env);
#else /* CONFIG_OF_DEVICE */
static inline int of_driver_match_device(struct device *dev,
struct device_driver *drv)
{
return 0;
}
#endif /* CONFIG_OF_DEVICE */
#endif /* _LINUX_OF_DEVICE_H */