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[PATCH] w1: hotplug support. 

Here is W1 hotplug in addition to netlink notifications.

Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
hifive-unleashed-5.1
Evgeniy Polyakov 2005-08-11 13:20:07 +04:00 committed by Greg Kroah-Hartman
parent 8949d2aa05
commit 7f772ed8df
2 changed files with 82 additions and 14 deletions
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90
drivers/w1/w1.c
View File

@ -125,27 +125,41 @@ static struct bin_attribute w1_slave_bin_attribute = {
.read = &w1_default_read_bin,
};
static int w1_hotplug(struct device *dev, char **envp, int num_envp, char *buffer, int buffer_size);
static struct bus_type w1_bus_type = {
.name = "w1",
.match = w1_master_match,
.hotplug = w1_hotplug,
};
struct device_driver w1_driver = {
.name = "w1_driver",
struct device_driver w1_master_driver = {
.name = "w1_master_driver",
.bus = &w1_bus_type,
.probe = w1_master_probe,
.remove = w1_master_remove,
};
struct device w1_device = {
struct device w1_master_device = {
.parent = NULL,
.bus = &w1_bus_type,
.bus_id = "w1 bus master",
.driver = &w1_driver,
.driver = &w1_master_driver,
.release = &w1_master_release
};
struct device_driver w1_slave_driver = {
.name = "w1_slave_driver",
.bus = &w1_bus_type,
};
struct device w1_slave_device = {
.parent = NULL,
.bus = &w1_bus_type,
.bus_id = "w1 bus slave",
.driver = &w1_slave_driver,
};
static ssize_t w1_master_attribute_show_name(struct device *dev, struct device_attribute *attr, char *buf)
{
struct w1_master *md = container_of(dev, struct w1_master, dev);
@ -329,12 +343,55 @@ void w1_destroy_master_attributes(struct w1_master *master)
sysfs_remove_group(&master->dev.kobj, &w1_master_defattr_group);
}
#ifdef CONFIG_HOTPLUG
static int w1_hotplug(struct device *dev, char **envp, int num_envp, char *buffer, int buffer_size)
{
struct w1_master *md = NULL;
struct w1_slave *sl = NULL;
char *event_owner, *name;
int err, cur_index=0, cur_len=0;
if (dev->driver == &w1_master_driver) {
md = container_of(dev, struct w1_master, dev);
event_owner = "master";
name = md->name;
} else if (dev->driver == &w1_slave_driver) {
sl = container_of(dev, struct w1_slave, dev);
event_owner = "slave";
name = sl->name;
} else {
dev_dbg(dev, "Unknown hotplug event.\n");
return -EINVAL;
}
dev_dbg(dev, "Hotplug event for %s %s, bus_id=%s.\n", event_owner, name, dev->bus_id);
if (dev->driver != &w1_slave_driver || !sl)
return 0;
err = add_hotplug_env_var(envp, num_envp, &cur_index, buffer, buffer_size, &cur_len, "W1_FID=%02X", sl->reg_num.family);
if (err)
return err;
err = add_hotplug_env_var(envp, num_envp, &cur_index, buffer, buffer_size, &cur_len, "W1_SLAVE_ID=%024llX", sl->reg_num.id);
if (err)
return err;
return 0;
};
#else
static int w1_hotplug(struct device *dev, char **envp, int num_envp, char *buffer, int buffer_size)
{
return 0;
}
#endif
static int __w1_attach_slave_device(struct w1_slave *sl)
{
int err;
sl->dev.parent = &sl->master->dev;
sl->dev.driver = sl->master->driver;
sl->dev.driver = &w1_slave_driver;
sl->dev.bus = &w1_bus_type;
sl->dev.release = &w1_slave_release;
@ -507,7 +564,6 @@ void w1_reconnect_slaves(struct w1_family *f)
spin_unlock_bh(&w1_mlock);
}
static void w1_slave_found(unsigned long data, u64 rn)
{
int slave_count;
@ -783,7 +839,7 @@ static int w1_init(void)
goto err_out_exit_init;
}
retval = driver_register(&w1_driver);
retval = driver_register(&w1_master_driver);
if (retval) {
printk(KERN_ERR
"Failed to register master driver. err=%d.\n",
@ -791,18 +847,29 @@ static int w1_init(void)
goto err_out_bus_unregister;
}
retval = driver_register(&w1_slave_driver);
if (retval) {
printk(KERN_ERR
"Failed to register master driver. err=%d.\n",
retval);
goto err_out_master_unregister;
}
control_thread = kernel_thread(&w1_control, NULL, 0);
if (control_thread < 0) {
printk(KERN_ERR "Failed to create control thread. err=%d\n",
control_thread);
retval = control_thread;
goto err_out_driver_unregister;
goto err_out_slave_unregister;
}
return 0;
err_out_driver_unregister:
driver_unregister(&w1_driver);
err_out_slave_unregister:
driver_unregister(&w1_slave_driver);
err_out_master_unregister:
driver_unregister(&w1_master_driver);
err_out_bus_unregister:
bus_unregister(&w1_bus_type);
@ -821,7 +888,8 @@ static void w1_fini(void)
control_needs_exit = 1;
wait_for_completion(&w1_control_complete);
driver_unregister(&w1_driver);
driver_unregister(&w1_slave_driver);
driver_unregister(&w1_master_driver);
bus_unregister(&w1_bus_type);
}

6
drivers/w1/w1_int.c
View File

@ -29,9 +29,9 @@
static u32 w1_ids = 1;
extern struct device_driver w1_driver;
extern struct device_driver w1_master_driver;
extern struct bus_type w1_bus_type;
extern struct device w1_device;
extern struct device w1_master_device;
extern int w1_max_slave_count;
extern int w1_max_slave_ttl;
extern struct list_head w1_masters;
@ -125,7 +125,7 @@ int w1_add_master_device(struct w1_bus_master *master)
return(-EINVAL);
}
dev = w1_alloc_dev(w1_ids++, w1_max_slave_count, w1_max_slave_ttl, &w1_driver, &w1_device);
dev = w1_alloc_dev(w1_ids++, w1_max_slave_count, w1_max_slave_ttl, &w1_master_driver, &w1_master_device);
if (!dev)
return -ENOMEM;