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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-08-21 13:24:33 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-08-22 10:55:04 -0700 |
| commit | 5b187b3c0edf9aae6ebbad61b9fbb4ec1795e18b (patch) | |
| tree | 5cb4c7e491aa31b91524125d29f27cc89a38d659 /drivers/w1/w1.c | |
| parent | 47eba33a0997fc7362ae41cf28cea687e28bd731 (diff) | |
| download | lwn-5b187b3c0edf9aae6ebbad61b9fbb4ec1795e18b.tar.gz lwn-5b187b3c0edf9aae6ebbad61b9fbb4ec1795e18b.zip | |
w1: use default attribute groups for w1 slave devices
As we have 2 sysfs files for the w1 slave devices, let the driver core
create / destroy them automatically by setting the default attribute
group for them, saving code and housekeeping logic.
Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/w1/w1.c')
| -rw-r--r-- | drivers/w1/w1.c | 38 |
1 files changed, 11 insertions, 27 deletions
diff --git a/drivers/w1/w1.c b/drivers/w1/w1.c index 3c798db0152c..52b6c2f02f7a 100644 --- a/drivers/w1/w1.c +++ b/drivers/w1/w1.c @@ -96,14 +96,15 @@ static void w1_slave_release(struct device *dev) complete(&sl->released); } -static ssize_t w1_slave_read_name(struct device *dev, struct device_attribute *attr, char *buf) +static ssize_t name_show(struct device *dev, struct device_attribute *attr, char *buf) { struct w1_slave *sl = dev_to_w1_slave(dev); return sprintf(buf, "%s\n", sl->name); } +static DEVICE_ATTR_RO(name); -static ssize_t w1_slave_read_id(struct device *dev, +static ssize_t id_show(struct device *dev, struct device_attribute *attr, char *buf) { struct w1_slave *sl = dev_to_w1_slave(dev); @@ -112,11 +113,14 @@ static ssize_t w1_slave_read_id(struct device *dev, memcpy(buf, (u8 *)&sl->reg_num, count); return count; } +static DEVICE_ATTR_RO(id); -static struct device_attribute w1_slave_attr_name = - __ATTR(name, S_IRUGO, w1_slave_read_name, NULL); -static struct device_attribute w1_slave_attr_id = - __ATTR(id, S_IRUGO, w1_slave_read_id, NULL); +static struct attribute *w1_slave_attrs[] = { + &dev_attr_name.attr, + &dev_attr_id.attr, + NULL, +}; +ATTRIBUTE_GROUPS(w1_slave); /* Default family */ @@ -610,25 +614,6 @@ static int w1_bus_notify(struct notifier_block *nb, unsigned long action, switch (action) { case BUS_NOTIFY_ADD_DEVICE: - /* Create our sysfs files before userspace is told about it */ - /* Create "name" entry */ - err = device_create_file(&sl->dev, &w1_slave_attr_name); - if (err < 0) { - dev_err(&sl->dev, - "sysfs file creation for [%s] failed. err=%d\n", - dev_name(&sl->dev), err); - return err; - } - - /* Create "id" entry */ - err = device_create_file(&sl->dev, &w1_slave_attr_id); - if (err < 0) { - dev_err(&sl->dev, - "sysfs file creation for [%s] failed. err=%d\n", - dev_name(&sl->dev), err); - return err; - } - /* if the family driver needs to initialize something... */ if (sl->family->fops && sl->family->fops->add_slave && ((err = sl->family->fops->add_slave(sl)) < 0)) { @@ -643,8 +628,6 @@ static int w1_bus_notify(struct notifier_block *nb, unsigned long action, /* Remove our sysfs files */ if (sl->family->fops && sl->family->fops->remove_slave) sl->family->fops->remove_slave(sl); - device_remove_file(&sl->dev, &w1_slave_attr_id); - device_remove_file(&sl->dev, &w1_slave_attr_name); break; } return 0; @@ -662,6 +645,7 @@ static int __w1_attach_slave_device(struct w1_slave *sl) sl->dev.driver = &w1_slave_driver; sl->dev.bus = &w1_bus_type; sl->dev.release = &w1_slave_release; + sl->dev.groups = w1_slave_groups; dev_set_name(&sl->dev, "%02x-%012llx", (unsigned int) sl->reg_num.family, |