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authorGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-08-21 15:44:58 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-08-22 11:05:43 -0700
commit729fb9d33fe239e350a7e33e9f6aec2767086bd4 (patch)
tree279db34b83c7e79ffd9445f628349b3695a86b29 /drivers/w1
parent32ea4175aea26181e2ed9a87853bb4bebd44e59e (diff)
downloadlinux-next-729fb9d33fe239e350a7e33e9f6aec2767086bd4.tar.gz
w1: slaves: w1_ds2413.c: 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: Andrew Morton <akpm@linux-foundation.org> Cc: Alexander Stein <alexander.stein@informatik.tu-chemnitz.de> Cc: Mariusz Bialonczyk <manio@skyboo.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/w1')
-rw-r--r--drivers/w1/slaves/w1_ds2413.c72
1 files changed, 22 insertions, 50 deletions
diff --git a/drivers/w1/slaves/w1_ds2413.c b/drivers/w1/slaves/w1_ds2413.c
index 85937773a96a..ee28fc1ff390 100644
--- a/drivers/w1/slaves/w1_ds2413.c
+++ b/drivers/w1/slaves/w1_ds2413.c
@@ -30,10 +30,9 @@ MODULE_ALIAS("w1-family-" __stringify(W1_FAMILY_DS2413));
#define W1_F3A_FUNC_PIO_ACCESS_WRITE 0x5A
#define W1_F3A_SUCCESS_CONFIRM_BYTE 0xAA
-static ssize_t w1_f3a_read_state(
- struct file *filp, struct kobject *kobj,
- struct bin_attribute *bin_attr,
- char *buf, loff_t off, size_t count)
+static ssize_t state_read(struct file *filp, struct kobject *kobj,
+ struct bin_attribute *bin_attr, char *buf, loff_t off,
+ size_t count)
{
struct w1_slave *sl = kobj_to_w1_slave(kobj);
dev_dbg(&sl->dev,
@@ -66,10 +65,11 @@ static ssize_t w1_f3a_read_state(
return 1;
}
-static ssize_t w1_f3a_write_output(
- struct file *filp, struct kobject *kobj,
- struct bin_attribute *bin_attr,
- char *buf, loff_t off, size_t count)
+static BIN_ATTR_RO(state, 1);
+
+static ssize_t output_write(struct file *filp, struct kobject *kobj,
+ struct bin_attribute *bin_attr, char *buf,
+ loff_t off, size_t count)
{
struct w1_slave *sl = kobj_to_w1_slave(kobj);
u8 w1_buf[3];
@@ -110,53 +110,25 @@ error:
return -EIO;
}
-#define NB_SYSFS_BIN_FILES 2
-static struct bin_attribute w1_f3a_sysfs_bin_files[NB_SYSFS_BIN_FILES] = {
- {
- .attr = {
- .name = "state",
- .mode = S_IRUGO,
- },
- .size = 1,
- .read = w1_f3a_read_state,
- },
- {
- .attr = {
- .name = "output",
- .mode = S_IRUGO | S_IWUSR | S_IWGRP,
- },
- .size = 1,
- .write = w1_f3a_write_output,
- }
+static BIN_ATTR(output, S_IRUGO | S_IWUSR | S_IWGRP, NULL, output_write, 1);
+
+static struct bin_attribute *w1_f3a_bin_attrs[] = {
+ &bin_attr_state,
+ &bin_attr_output,
+ NULL,
};
-static int w1_f3a_add_slave(struct w1_slave *sl)
-{
- int err = 0;
- int i;
-
- for (i = 0; i < NB_SYSFS_BIN_FILES && !err; ++i)
- err = sysfs_create_bin_file(
- &sl->dev.kobj,
- &(w1_f3a_sysfs_bin_files[i]));
- if (err)
- while (--i >= 0)
- sysfs_remove_bin_file(&sl->dev.kobj,
- &(w1_f3a_sysfs_bin_files[i]));
- return err;
-}
+static const struct attribute_group w1_f3a_group = {
+ .bin_attrs = w1_f3a_bin_attrs,
+};
-static void w1_f3a_remove_slave(struct w1_slave *sl)
-{
- int i;
- for (i = NB_SYSFS_BIN_FILES - 1; i >= 0; --i)
- sysfs_remove_bin_file(&sl->dev.kobj,
- &(w1_f3a_sysfs_bin_files[i]));
-}
+static const struct attribute_group *w1_f3a_groups[] = {
+ &w1_f3a_group,
+ NULL,
+};
static struct w1_family_ops w1_f3a_fops = {
- .add_slave = w1_f3a_add_slave,
- .remove_slave = w1_f3a_remove_slave,
+ .groups = w1_f3a_groups,
};
static struct w1_family w1_family_3a = {