diff options
Diffstat (limited to 'drivers/w1')
| -rw-r--r-- | drivers/w1/w1.c | 90 | ||||
| -rw-r--r-- | drivers/w1/w1_int.c | 6 |
2 files changed, 82 insertions, 14 deletions
diff --git a/drivers/w1/w1.c b/drivers/w1/w1.c index 0bbf029b1ef1..9c7777b6bbdc 100644 --- a/drivers/w1/w1.c +++ b/drivers/w1/w1.c @@ -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); } diff --git a/drivers/w1/w1_int.c b/drivers/w1/w1_int.c index 2a538d012194..c13724fd0971 100644 --- a/drivers/w1/w1_int.c +++ b/drivers/w1/w1_int.c @@ -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; |