@@ -1090,6 +1090,31 @@ struct i2c_adapter *of_find_i2c_adapter_by_node(struct device_node *node)
return i2c_verify_adapter(dev);
}
EXPORT_SYMBOL(of_find_i2c_adapter_by_node);
+
+const struct of_device_id
+*i2c_of_match_device_strip_vendor(const struct of_device_id *matches,
+ struct device *dev)
+{
+ const struct i2c_client *client = i2c_verify_client(dev);
+ const char *name;
+
+ if (!(client && matches))
+ return NULL;
+
+ for (; matches->compatible[0]; matches++) {
+ name = strchr(matches->compatible, ',');
+ if (!name)
+ name = matches->compatible;
+ else
+ name++;
+
+ if (!strnicmp(client->name, name, strlen(client->name)))
+ return matches;
+ }
+
+ return NULL;
+}
+EXPORT_SYMBOL_GPL(i2c_of_match_device_strip_vendor);
#else
static void of_i2c_register_devices(struct i2c_adapter *adap) { }
#endif /* CONFIG_OF */
@@ -564,6 +564,9 @@ 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_strip_vendor(const struct of_device_id *matches,
+ struct device *dev);
#else
static inline struct i2c_client *of_find_i2c_device_by_node(struct device_node *node)
@@ -575,6 +578,13 @@ 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_strip_vendor(const struct of_device_id *matches,
+ struct device *dev)
+{
+ return NULL;
+}
#endif /* CONFIG_OF */
#endif /* _LINUX_I2C_H */
A great deal of I2C devices are currently matched via DT node name, and as such the compatible naming convention of '<vendor>,<device>' has gone somewhat awry - some nodes don't supply one, some supply an arbitrary string and others the correct device name with an arbitrary vendor prefix. In an effort to correct this problem we have to supply a mechanism to match a device by compatible string AND by simple device name. This function strips off the '<vendor>,' part of a supplied compatible string and attempts to match without it. The plan is to remove this function once all of the compatible strings for each device have been brought into line. Signed-off-by: Lee Jones <lee.jones@linaro.org> --- drivers/i2c/i2c-core.c | 25 +++++++++++++++++++++++++ include/linux/i2c.h | 10 ++++++++++ 2 files changed, 35 insertions(+)