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.lik...@secretlab.ca>
CC: Greg Kroah-Hartman <gre...@suse.de>
CC: Michal Simek <mon...@monstr.eu>
CC: Grant Likely <grant.lik...@secretlab.ca>
CC: Benjamin Herrenschmidt <b...@kernel.crashing.org>
CC: Stephen Rothwell <s...@canb.auug.org.au>
CC: linux-ker...@vger.kernel.org
CC: microblaze-ucli...@itee.uq.edu.au
CC: linuxppc-...@ozlabs.org
CC: devicetree-disc...@lists.ozlabs.org
---
drivers/of/device.c | 2 +-
include/linux/of_device.h | 19 +++++++++++++++++++
2 files changed, 20 insertions(+), 1 deletions(-)
diff --git a/drivers/of/device.c b/drivers/of/device.c
index c2a98f5..5282a20 100644
--- a/drivers/of/device.c
+++ b/drivers/of/device.c
@@ -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);
}
diff --git a/include/linux/of_device.h b/include/linux/of_device.h
index 238e92e..91d75fb 100644
--- a/include/linux/of_device.h
+++ b/include/linux/of_device.h
@@ -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 */
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