#include <linux/init.h>
#include <linux/idr.h>
#include <linux/seq_file.h>
+#include <linux/platform_device.h>
#include <asm/uaccess.h>
/* inform drivers of new adapters */
list_for_each(item,&drivers) {
driver = list_entry(item, struct i2c_driver, list);
- if (driver->flags & I2C_DF_NOTIFY)
+ if (driver->attach_adapter)
/* We ignore the return code; if it fails, too bad */
driver->attach_adapter(adap);
}
if (driver->detach_adapter)
if ((res = driver->detach_adapter(adap))) {
dev_err(&adap->dev, "detach_adapter failed "
- "for driver [%s]\n", driver->name);
+ "for driver [%s]\n",
+ driver->driver.name);
goto out_unlock;
}
}
list_for_each_safe(item, _n, &adap->clients) {
client = list_entry(item, struct i2c_client, list);
- /* detaching devices is unconditional of the set notify
- * flag, as _all_ clients that reside on the adapter
- * must be deleted, as this would cause invalid states.
- */
if ((res=client->driver->detach_client(client))) {
dev_err(&adap->dev, "detach_client failed for client "
"[%s] at address 0x%02x\n", client->name,
* chips.
*/
-int i2c_add_driver(struct i2c_driver *driver)
+int i2c_register_driver(struct module *owner, struct i2c_driver *driver)
{
struct list_head *item;
struct i2c_adapter *adapter;
down(&core_lists);
/* add the driver to the list of i2c drivers in the driver core */
- driver->driver.owner = driver->owner;
- driver->driver.name = driver->name;
+ driver->driver.owner = owner;
driver->driver.bus = &i2c_bus_type;
driver->driver.probe = i2c_device_probe;
driver->driver.remove = i2c_device_remove;
goto out_unlock;
list_add_tail(&driver->list,&drivers);
- pr_debug("i2c-core: driver [%s] registered\n", driver->name);
+ pr_debug("i2c-core: driver [%s] registered\n", driver->driver.name);
/* now look for instances of driver on our adapters */
- if (driver->flags & I2C_DF_NOTIFY) {
+ if (driver->attach_adapter) {
list_for_each(item,&adapters) {
adapter = list_entry(item, struct i2c_adapter, list);
driver->attach_adapter(adapter);
up(&core_lists);
return res;
}
+EXPORT_SYMBOL(i2c_register_driver);
int i2c_del_driver(struct i2c_driver *driver)
{
/* Have a look at each adapter, if clients of this driver are still
* attached. If so, detach them to be able to kill the driver
* afterwards.
- *
- * Removing clients does not depend on the notify flag, else
- * invalid operation might (will!) result, when using stale client
- * pointers.
*/
list_for_each(item1,&adapters) {
adap = list_entry(item1, struct i2c_adapter, list);
if (driver->detach_adapter) {
if ((res = driver->detach_adapter(adap))) {
dev_err(&adap->dev, "detach_adapter failed "
- "for driver [%s]\n", driver->name);
+ "for driver [%s]\n",
+ driver->driver.name);
goto out_unlock;
}
} else {
driver_unregister(&driver->driver);
list_del(&driver->list);
- pr_debug("i2c-core: driver [%s] unregistered\n", driver->name);
+ pr_debug("i2c-core: driver [%s] unregistered\n", driver->driver.name);
out_unlock:
up(&core_lists);
}
}
- if (client->flags & I2C_CLIENT_ALLOW_USE)
- client->usage_count = 0;
+ client->usage_count = 0;
client->dev.parent = &client->adapter->dev;
client->dev.driver = &client->driver->driver;
struct i2c_adapter *adapter = client->adapter;
int res = 0;
- if ((client->flags & I2C_CLIENT_ALLOW_USE)
- && (client->usage_count > 0)) {
+ if (client->usage_count > 0) {
dev_warn(&client->dev, "Client [%s] still busy, "
"can't detach\n", client->name);
return -EBUSY;
static int i2c_inc_use_client(struct i2c_client *client)
{
- if (!try_module_get(client->driver->owner))
+ if (!try_module_get(client->driver->driver.owner))
return -ENODEV;
if (!try_module_get(client->adapter->owner)) {
- module_put(client->driver->owner);
+ module_put(client->driver->driver.owner);
return -ENODEV;
}
static void i2c_dec_use_client(struct i2c_client *client)
{
- module_put(client->driver->owner);
+ module_put(client->driver->driver.owner);
module_put(client->adapter->owner);
}
if (ret)
return ret;
- if (client->flags & I2C_CLIENT_ALLOW_USE) {
- if (client->flags & I2C_CLIENT_ALLOW_MULTIPLE_USE)
- client->usage_count++;
- else if (client->usage_count > 0)
- goto busy;
- else
- client->usage_count++;
- }
+ client->usage_count++;
return 0;
- busy:
- i2c_dec_use_client(client);
- return -EBUSY;
}
int i2c_release_client(struct i2c_client *client)
{
- if(client->flags & I2C_CLIENT_ALLOW_USE) {
- if(client->usage_count>0)
- client->usage_count--;
- else {
- pr_debug("i2c-core: %s used one too many times\n",
- __FUNCTION__);
- return -EPERM;
- }
+ if (!client->usage_count) {
+ pr_debug("i2c-core: %s used one too many times\n",
+ __FUNCTION__);
+ return -EPERM;
}
+ client->usage_count--;
i2c_dec_use_client(client);
return 0;
down(&adap->clist_lock);
list_for_each(item,&adap->clients) {
client = list_entry(item, struct i2c_client, list);
- if (!try_module_get(client->driver->owner))
+ if (!try_module_get(client->driver->driver.owner))
continue;
if (NULL != client->driver->command) {
up(&adap->clist_lock);
client->driver->command(client,cmd,arg);
down(&adap->clist_lock);
}
- module_put(client->driver->owner);
+ module_put(client->driver->driver.owner);
}
up(&adap->clist_lock);
}
EXPORT_SYMBOL(i2c_add_adapter);
EXPORT_SYMBOL(i2c_del_adapter);
-EXPORT_SYMBOL(i2c_add_driver);
EXPORT_SYMBOL(i2c_del_driver);
EXPORT_SYMBOL(i2c_attach_client);
EXPORT_SYMBOL(i2c_detach_client);