w1: slaves: w1_therm: 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: David Stevenson <david@avoncliff.com>
Cc: Alexander Stein <alexander.stein@informatik.tu-chemnitz.de>
Cc: Michael Arndt <michael@scriptkiller.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 9 insertions, 15 deletions

diff --git a/drivers/w1/slaves/w1_therm.c b/drivers/w1/slaves/w1_therm.c
index 8978360bd387..8b5ff33f72cf 100644
--- a/drivers/w1/slaves/w1_therm.c
+++ b/drivers/w1/slaves/w1_therm.c
@@ -59,25 +59,19 @@ static int w1_strong_pullup = 1;
 module_param_named(strong_pullup, w1_strong_pullup, int, 0);
 
 
-static ssize_t w1_therm_read(struct device *device,
+static ssize_t w1_slave_show(struct device *device,
         struct device_attribute *attr, char *buf);
 
-static struct device_attribute w1_therm_attr =
-        __ATTR(w1_slave, S_IRUGO, w1_therm_read, NULL);
+static DEVICE_ATTR_RO(w1_slave);
 
-static int w1_therm_add_slave(struct w1_slave *sl)
-{
-        return device_create_file(&sl->dev, &w1_therm_attr);
-}
-
-static void w1_therm_remove_slave(struct w1_slave *sl)
-{
-        device_remove_file(&sl->dev, &w1_therm_attr);
-}
+static struct attribute *w1_therm_attrs[] = {
+        &dev_attr_w1_slave.attr,
+        NULL,
+};
+ATTRIBUTE_GROUPS(w1_therm);
 
 static struct w1_family_ops w1_therm_fops = {
-        .add_slave      = w1_therm_add_slave,
-        .remove_slave   = w1_therm_remove_slave,
+        .groups         = w1_therm_groups,
 };
 
 static struct w1_family w1_therm_family_DS18S20 = {
@@ -178,7 +172,7 @@ static inline int w1_convert_temp(u8 rom[9], u8 fid)
 }
 
 
-static ssize_t w1_therm_read(struct device *device,
+static ssize_t w1_slave_show(struct device *device,
         struct device_attribute *attr, char *buf)
 {
         struct w1_slave *sl = dev_to_w1_slave(device);