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
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@ -20,7 +20,7 @@
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const struct of_device_id *of_match_device(const struct of_device_id *matches,
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const struct of_device_id *of_match_device(const struct of_device_id *matches,
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const struct device *dev)
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const struct device *dev)
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{
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{
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if (!dev->of_node)
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if ((!matches) || (!dev->of_node))
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return NULL;
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return NULL;
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return of_match_node(matches, dev->of_node);
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return of_match_node(matches, dev->of_node);
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}
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}
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@ -30,6 +30,17 @@
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extern const struct of_device_id *of_match_device(
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extern const struct of_device_id *of_match_device(
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const struct of_device_id *matches, const struct device *dev);
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const struct of_device_id *matches, const struct device *dev);
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/**
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* of_driver_match_device - Tell if a driver's of_match_table matches a device.
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* @drv: the device_driver structure to test
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* @dev: the device structure to match against
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*/
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static inline int of_driver_match_device(const struct device *dev,
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const struct device_driver *drv)
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{
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return of_match_device(drv->of_match_table, dev) != NULL;
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}
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extern struct of_device *of_dev_get(struct of_device *dev);
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extern struct of_device *of_dev_get(struct of_device *dev);
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extern void of_dev_put(struct of_device *dev);
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extern void of_dev_put(struct of_device *dev);
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@ -48,6 +59,14 @@ extern ssize_t of_device_get_modalias(struct device *dev,
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extern int of_device_uevent(struct device *dev, struct kobj_uevent_env *env);
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extern int of_device_uevent(struct device *dev, struct kobj_uevent_env *env);
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#else /* CONFIG_OF_DEVICE */
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static inline int of_driver_match_device(struct device *dev,
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struct device_driver *drv)
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{
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return 0;
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}
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#endif /* CONFIG_OF_DEVICE */
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#endif /* CONFIG_OF_DEVICE */
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#endif /* _LINUX_OF_DEVICE_H */
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#endif /* _LINUX_OF_DEVICE_H */
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