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i2c: Get rid of the legacy binding model

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We converted all the legacy i2c drivers so we can finally get rid of
the legacy binding model. Hooray!

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: David Brownell <dbrownell@users.sourceforge.net>
This commit is contained in:
Jean Delvare
2009-06-19 16:58:18 +02:00
parent 352da9820e
commit 729d6dd571
4 changed files with 20 additions and 127 deletions
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83
drivers/i2c/i2c-core.c
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@@ -43,6 +43,7 @@ static DEFINE_IDR(i2c_adapter_idr);
#define is_newstyle_driver(d) ((d)->probe || (d)->remove || (d)->detect)
static int i2c_attach_client(struct i2c_client *client);
static int i2c_detect(struct i2c_adapter *adapter, struct i2c_driver *driver);
/* ------------------------------------------------------------------------- */
@@ -83,10 +84,6 @@ static int i2c_device_uevent(struct device *dev, struct kobj_uevent_env *env)
{
struct i2c_client *client = to_i2c_client(dev);
/* by definition, legacy drivers can't hotplug */
if (dev->driver)
return 0;
if (add_uevent_var(env, "MODALIAS=%s%s",
I2C_MODULE_PREFIX, client->name))
return -ENOMEM;
@@ -455,7 +452,7 @@ static int i2c_register_adapter(struct i2c_adapter *adap)
dev_dbg(&adap->dev, "adapter [%s] registered\n", adap->name);
/* create pre-declared device nodes for new-style drivers */
/* create pre-declared device nodes */
if (adap->nr < __i2c_first_dynamic_bus_num)
i2c_scan_static_board_info(adap);
@@ -617,26 +614,9 @@ int i2c_del_adapter(struct i2c_adapter *adap)
if (res)
goto out_unlock;
/* detach any active clients. This must be done first, because
* it can fail; in which case we give up. */
/* Detach any active clients */
list_for_each_entry_safe_reverse(client, _n, &adap->clients, list) {
struct i2c_driver *driver;
driver = client->driver;
/* new style, follow standard driver model */
if (!driver || is_newstyle_driver(driver)) {
i2c_unregister_device(client);
continue;
}
/* legacy drivers create and remove clients themselves */
if ((res = driver->detach_client(client))) {
dev_err(&adap->dev, "detach_client failed for client "
"[%s] at address 0x%02x\n", client->name,
client->addr);
goto out_unlock;
}
i2c_unregister_device(client);
}
/* clean up the sysfs representation */
@@ -680,11 +660,7 @@ static int __attach_adapter(struct device *dev, void *data)
/*
* An i2c_driver is used with one or more i2c_client (device) nodes to access
* i2c slave chips, on a bus instance associated with some i2c_adapter. There
* are two models for binding the driver to its device: "new style" drivers
* follow the standard Linux driver model and just respond to probe() calls
* issued if the driver core sees they match(); "legacy" drivers create device
* nodes themselves.
* i2c slave chips, on a bus instance associated with some i2c_adapter.
*/
int i2c_register_driver(struct module *owner, struct i2c_driver *driver)
@@ -695,21 +671,11 @@ int i2c_register_driver(struct module *owner, struct i2c_driver *driver)
if (unlikely(WARN_ON(!i2c_bus_type.p)))
return -EAGAIN;
/* new style driver methods can't mix with legacy ones */
if (is_newstyle_driver(driver)) {
if (driver->detach_adapter || driver->detach_client) {
printk(KERN_WARNING
"i2c-core: driver [%s] is confused\n",
driver->driver.name);
return -EINVAL;
}
}
/* add the driver to the list of i2c drivers in the driver core */
driver->driver.owner = owner;
driver->driver.bus = &i2c_bus_type;
/* for new style drivers, when registration returns the driver core
/* When registration returns, the driver core
* will have called probe() for all matching-but-unbound devices.
*/
res = driver_register(&driver->driver);
@@ -748,29 +714,11 @@ static int __detach_adapter(struct device *dev, void *data)
if (is_newstyle_driver(driver))
return 0;
/* 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.
*/
if (driver->detach_adapter) {
if (driver->detach_adapter(adapter))
dev_err(&adapter->dev,
"detach_adapter failed for driver [%s]\n",
driver->driver.name);
} else {
struct i2c_client *client, *_n;
list_for_each_entry_safe(client, _n, &adapter->clients, list) {
if (client->driver != driver)
continue;
dev_dbg(&adapter->dev,
"detaching client [%s] at 0x%02x\n",
client->name, client->addr);
if (driver->detach_client(client))
dev_err(&adapter->dev, "detach_client "
"failed for client [%s] at 0x%02x\n",
client->name, client->addr);
}
}
return 0;
@@ -812,7 +760,7 @@ static int i2c_check_addr(struct i2c_adapter *adapter, int addr)
return device_for_each_child(&adapter->dev, &addr, __i2c_check_addr);
}
int i2c_attach_client(struct i2c_client *client)
static int i2c_attach_client(struct i2c_client *client)
{
struct i2c_adapter *adapter = client->adapter;
int res;
@@ -854,23 +802,6 @@ out_err:
"(%d)\n", client->name, client->addr, res);
return res;
}
EXPORT_SYMBOL(i2c_attach_client);
int i2c_detach_client(struct i2c_client *client)
{
struct i2c_adapter *adapter = client->adapter;
mutex_lock(&adapter->clist_lock);
list_del(&client->list);
mutex_unlock(&adapter->clist_lock);
init_completion(&client->released);
device_unregister(&client->dev);
wait_for_completion(&client->released);
return 0;
}
EXPORT_SYMBOL(i2c_detach_client);
/**
* i2c_use_client - increments the reference count of the i2c client structure