i2c: Convert i2c clients to a device type

This is required for upcoming changes.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Kay Sievers <kay.sievers@vrfy.org>

1 files changed, 47 insertions, 20 deletions

diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index 0e45c296d3d2..f236b34296ee 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -64,9 +64,13 @@ static const struct i2c_device_id *i2c_match_id(const struct i2c_device_id *id,
 
 static int i2c_device_match(struct device *dev, struct device_driver *drv)
 {
-        struct i2c_client       *client = to_i2c_client(dev);
-        struct i2c_driver       *driver = to_i2c_driver(drv);
+        struct i2c_client       *client = i2c_verify_client(dev);
+        struct i2c_driver       *driver;
 
+        if (!client)
+                return 0;
+
+        driver = to_i2c_driver(drv);
         /* match on an id table if there is one */
         if (driver->id_table)
                 return i2c_match_id(driver->id_table, client) != NULL;
@@ -94,10 +98,14 @@ static int i2c_device_uevent(struct device *dev, struct kobj_uevent_env *env)
 
 static int i2c_device_probe(struct device *dev)
 {
-        struct i2c_client       *client = to_i2c_client(dev);
-        struct i2c_driver       *driver = to_i2c_driver(dev->driver);
+        struct i2c_client       *client = i2c_verify_client(dev);
+        struct i2c_driver       *driver;
         int status;
 
+        if (!client)
+                return 0;
+
+        driver = to_i2c_driver(dev->driver);
         if (!driver->probe || !driver->id_table)
                 return -ENODEV;
         client->driver = driver;
@@ -114,11 +122,11 @@ static int i2c_device_probe(struct device *dev)
 
 static int i2c_device_remove(struct device *dev)
 {
-        struct i2c_client       *client = to_i2c_client(dev);
+        struct i2c_client       *client = i2c_verify_client(dev);
         struct i2c_driver       *driver;
         int                     status;
 
-        if (!dev->driver)
+        if (!client || !dev->driver)
                 return 0;
 
         driver = to_i2c_driver(dev->driver);
@@ -136,37 +144,40 @@ static int i2c_device_remove(struct device *dev)
 
 static void i2c_device_shutdown(struct device *dev)
 {
+        struct i2c_client *client = i2c_verify_client(dev);
         struct i2c_driver *driver;
 
-        if (!dev->driver)
+        if (!client || !dev->driver)
                 return;
         driver = to_i2c_driver(dev->driver);
         if (driver->shutdown)
-                driver->shutdown(to_i2c_client(dev));
+                driver->shutdown(client);
 }
 
 static int i2c_device_suspend(struct device *dev, pm_message_t mesg)
 {
+        struct i2c_client *client = i2c_verify_client(dev);
         struct i2c_driver *driver;
 
-        if (!dev->driver)
+        if (!client || !dev->driver)
                 return 0;
         driver = to_i2c_driver(dev->driver);
         if (!driver->suspend)
                 return 0;
-        return driver->suspend(to_i2c_client(dev), mesg);
+        return driver->suspend(client, mesg);
 }
 
 static int i2c_device_resume(struct device *dev)
 {
+        struct i2c_client *client = i2c_verify_client(dev);
         struct i2c_driver *driver;
 
-        if (!dev->driver)
+        if (!client || !dev->driver)
                 return 0;
         driver = to_i2c_driver(dev->driver);
         if (!driver->resume)
                 return 0;
-        return driver->resume(to_i2c_client(dev));
+        return driver->resume(client);
 }
 
 static void i2c_client_dev_release(struct device *dev)
@@ -188,18 +199,28 @@ show_modalias(struct device *dev, struct device_attribute *attr, char *buf)
         return sprintf(buf, "%s%s\n", I2C_MODULE_PREFIX, client->name);
 }
 
-static struct device_attribute i2c_dev_attrs[] = {
-        __ATTR(name, S_IRUGO, show_client_name, NULL),
+static DEVICE_ATTR(name, S_IRUGO, show_client_name, NULL);
+static DEVICE_ATTR(modalias, S_IRUGO, show_modalias, NULL);
+
+static struct attribute *i2c_dev_attrs[] = {
+        &dev_attr_name.attr,
         /* modalias helps coldplug:  modprobe $(cat .../modalias) */
-        __ATTR(modalias, S_IRUGO, show_modalias, NULL),
-        { },
+        &dev_attr_modalias.attr,
+        NULL
+};
+
+static struct attribute_group i2c_dev_attr_group = {
+        .attrs          = i2c_dev_attrs,
+};
+
+static const struct attribute_group *i2c_dev_attr_groups[] = {
+        &i2c_dev_attr_group,
+        NULL
 };
 
 struct bus_type i2c_bus_type = {
         .name           = "i2c",
-        .dev_attrs      = i2c_dev_attrs,
         .match          = i2c_device_match,
-        .uevent         = i2c_device_uevent,
         .probe          = i2c_device_probe,
         .remove         = i2c_device_remove,
         .shutdown       = i2c_device_shutdown,
@@ -208,6 +229,12 @@ struct bus_type i2c_bus_type = {
 };
 EXPORT_SYMBOL_GPL(i2c_bus_type);
 
+static struct device_type i2c_client_type = {
+        .groups         = i2c_dev_attr_groups,
+        .uevent         = i2c_device_uevent,
+        .release        = i2c_client_dev_release,
+};
+
 
 /**
  * i2c_verify_client - return parameter as i2c_client, or NULL
@@ -220,7 +247,7 @@ EXPORT_SYMBOL_GPL(i2c_bus_type);
  */
 struct i2c_client *i2c_verify_client(struct device *dev)
 {
-        return (dev->bus == &i2c_bus_type)
+        return (dev->type == &i2c_client_type)
                         ? to_i2c_client(dev)
                         : NULL;
 }
@@ -273,7 +300,7 @@ i2c_new_device(struct i2c_adapter *adap, struct i2c_board_info const *info)
 
         client->dev.parent = &client->adapter->dev;
         client->dev.bus = &i2c_bus_type;
-        client->dev.release = i2c_client_dev_release;
+        client->dev.type = &i2c_client_type;
 
         dev_set_name(&client->dev, "%d-%04x", i2c_adapter_id(adap),
                      client->addr);