i2c: export i2c_client_type structure

i2c bus has 2 different types of device belonging to the same bus and
bus notifiers use device type to distinguish between adapters and clients.
Previously we only had i2c_adapter_type exported, which made code wanting
to work with i2c_client devices test for type not equal to adapter type.
This unfortunately is not safe if we ever add another type to the bus,
so let's export i2c_client_type as well.

Reviewed-by: Jean Delvare <jdelvare@suse.de>
Acked-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Reviewed-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index d2402bbf6729e55143a9d097aaf455b65c27b1ba..bf7892e3b0c898f16b65813fa5c811edd2a15d3a 100644 (file)
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -74,7 +74,6 @@
 static DEFINE_MUTEX(core_lock);
 static DEFINE_IDR(i2c_adapter_idr);
 
-static struct device_type i2c_client_type;
 static int i2c_detect(struct i2c_adapter *adapter, struct i2c_driver *driver);
 
 static struct static_key i2c_trace_msg = STATIC_KEY_INIT_FALSE;
@@ -1097,11 +1096,12 @@ struct bus_type i2c_bus_type = {
 };
 EXPORT_SYMBOL_GPL(i2c_bus_type);
 
-static struct device_type i2c_client_type = {
+struct device_type i2c_client_type = {
        .groups         = i2c_dev_groups,
        .uevent         = i2c_device_uevent,
        .release        = i2c_client_dev_release,
 };
+EXPORT_SYMBOL_GPL(i2c_client_type);
 
 
 /**

diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index 6b183521c61697aa3af56082b830247f960d06fb..6366989d10018362ad21ce1c5fdcc2d7d049f066 100644 (file)
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -38,6 +38,7 @@
 
 extern struct bus_type i2c_bus_type;
 extern struct device_type i2c_adapter_type;
+extern struct device_type i2c_client_type;
 
 /* --- General options ------------------------------------------------        */