w1: slaves: w1_ds2423: 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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 9 insertions, 18 deletions

diff --git a/drivers/w1/slaves/w1_ds2423.c b/drivers/w1/slaves/w1_ds2423.c
index 7f86aec74088..7e41b7d91fb5 100644
--- a/drivers/w1/slaves/w1_ds2423.c
+++ b/drivers/w1/slaves/w1_ds2423.c
@@ -40,14 +40,8 @@
 #define COUNTER_COUNT 4
 #define READ_BYTE_COUNT 42
 
-static ssize_t w1_counter_read(struct device *device,
-        struct device_attribute *attr, char *buf);
-
-static struct device_attribute w1_counter_attr =
-        __ATTR(w1_slave, S_IRUGO, w1_counter_read, NULL);
-
-static ssize_t w1_counter_read(struct device *device,
-        struct device_attribute *attr, char *out_buf)
+static ssize_t w1_slave_show(struct device *device,
+                             struct device_attribute *attr, char *out_buf)
 {
         struct w1_slave *sl = dev_to_w1_slave(device);
         struct w1_master *dev = sl->master;
@@ -128,19 +122,16 @@ static ssize_t w1_counter_read(struct device *device,
         return PAGE_SIZE - c;
 }
 
-static int w1_f1d_add_slave(struct w1_slave *sl)
-{
-        return device_create_file(&sl->dev, &w1_counter_attr);
-}
+static DEVICE_ATTR_RO(w1_slave);
 
-static void w1_f1d_remove_slave(struct w1_slave *sl)
-{
-        device_remove_file(&sl->dev, &w1_counter_attr);
-}
+static struct attribute *w1_f1d_attrs[] = {
+        &dev_attr_w1_slave.attr,
+        NULL,
+};
+ATTRIBUTE_GROUPS(w1_f1d);
 
 static struct w1_family_ops w1_f1d_fops = {
-        .add_slave      = w1_f1d_add_slave,
-        .remove_slave   = w1_f1d_remove_slave,
+        .groups         = w1_f1d_groups,
 };
 
 static struct w1_family w1_family_1d = {