[PATCH v4 3/8] i2c: Match using traditional OF methods, then by vendor-less compatible strings

Kieran Bingham
2015-09-09T18:35:57Z

This function provides a single call for all I2C devices which need to
match firstly using traditional OF means i.e by of_node, then if that
fails we attempt to match using the supplied I2C client name with a
list of supplied compatible strings with the '<vendor>,' string
removed. The latter is required due to the unruly naming conventions
used currently by I2C devices.

Acked-by: Grant Likely <grant.likely@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
drivers/i2c/i2c-core.c | 16 ++++++++++++++++
include/linux/i2c.h | 12 ++++++++++++
2 files changed, 28 insertions(+)

diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index 0788c1f..94ca76e 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -1394,6 +1394,22 @@ i2c_of_match_device_strip_vendor(const struct of_device_id *matches,
return NULL;
}

+const struct of_device_id
+*i2c_of_match_device(const struct of_device_id *matches,
+ struct i2c_client *client)
+{
+ const struct of_device_id *match;
+
+ if (!(client && matches))
+ return NULL;
+
+ match = of_match_device(matches, &client->dev);
+ if (match)
+ return match;
+
+ return i2c_of_match_device_strip_vendor(matches, client);
+}
+EXPORT_SYMBOL_GPL(i2c_of_match_device);
#else
static void of_i2c_register_devices(struct i2c_adapter *adap) { }
#endif /* CONFIG_OF */
diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index e83a738..48bbbab 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -638,6 +638,10 @@ extern struct i2c_client *of_find_i2c_device_by_node(struct device_node *node);
/* must call put_device() when done with returned i2c_adapter device */
extern struct i2c_adapter *of_find_i2c_adapter_by_node(struct device_node *node);

+extern const struct of_device_id
+*i2c_of_match_device(const struct of_device_id *matches,
+ struct i2c_client *client);
+
#else

static inline struct i2c_client *of_find_i2c_device_by_node(struct device_node *node)
@@ -649,6 +653,14 @@ static inline struct i2c_adapter *of_find_i2c_adapter_by_node(struct device_node
{
return NULL;
}
+
+const struct of_device_id
+*i2c_of_match_device(const struct of_device_id *matches,
+ struct i2c_client *client)
+{
+ return NULL;
+}
+
#endif /* CONFIG_OF */

#endif /* _LINUX_I2C_H */
--
2.1.4