w1: slaves: w1_ds2781: convert to use w1_family_ops.groups
This moves the sysfs file creation/removal to the w1 core by using the
.groups field, saving code in the slave driver.
Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
Cc: Alexander Stein <alexander.stein@informatik.tu-chemnitz.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/w1/slaves/w1_ds2781.c b/drivers/w1/slaves/w1_ds2781.c
index 1aba8e4..1eb98fb 100644
--- a/drivers/w1/slaves/w1_ds2781.c
+++ b/drivers/w1/slaves/w1_ds2781.c
@@ -87,22 +87,28 @@
}
EXPORT_SYMBOL(w1_ds2781_eeprom_cmd);
-static ssize_t w1_ds2781_read_bin(struct file *filp,
- struct kobject *kobj,
- struct bin_attribute *bin_attr,
- char *buf, loff_t off, size_t count)
+static ssize_t w1_slave_read(struct file *filp, struct kobject *kobj,
+ struct bin_attribute *bin_attr, char *buf,
+ loff_t off, size_t count)
{
struct device *dev = container_of(kobj, struct device, kobj);
return w1_ds2781_io(dev, buf, off, count, 0);
}
-static struct bin_attribute w1_ds2781_bin_attr = {
- .attr = {
- .name = "w1_slave",
- .mode = S_IRUGO,
- },
- .size = DS2781_DATA_SIZE,
- .read = w1_ds2781_read_bin,
+static BIN_ATTR_RO(w1_slave, DS2781_DATA_SIZE);
+
+static struct bin_attribute *w1_ds2781_bin_attrs[] = {
+ &bin_attr_w1_slave,
+ NULL,
+};
+
+static const struct attribute_group w1_ds2781_group = {
+ .bin_attrs = w1_ds2781_bin_attrs,
+};
+
+static const struct attribute_group *w1_ds2781_groups[] = {
+ &w1_ds2781_group,
+ NULL,
};
static DEFINE_IDA(bat_ida);
@@ -130,16 +136,10 @@
if (ret)
goto pdev_add_failed;
- ret = sysfs_create_bin_file(&sl->dev.kobj, &w1_ds2781_bin_attr);
- if (ret)
- goto bin_attr_failed;
-
dev_set_drvdata(&sl->dev, pdev);
return 0;
-bin_attr_failed:
- platform_device_del(pdev);
pdev_add_failed:
platform_device_put(pdev);
pdev_alloc_failed:
@@ -155,12 +155,12 @@
platform_device_unregister(pdev);
ida_simple_remove(&bat_ida, id);
- sysfs_remove_bin_file(&sl->dev.kobj, &w1_ds2781_bin_attr);
}
static struct w1_family_ops w1_ds2781_fops = {
.add_slave = w1_ds2781_add_slave,
.remove_slave = w1_ds2781_remove_slave,
+ .groups = w1_ds2781_groups,
};
static struct w1_family w1_ds2781_family = {