[PATCH 07/11] w1: slaves: w1_ds2433: convert to use w1_family_ops.groups

From: Greg Kroah-Hartman
Date: Wed Aug 21 2013 - 18:48:14 EST


This moves the sysfs file creation/removal to the w1 core by using the
.groups field, saving code in the slave driver.

Cc: Evgeniy Polyakov <zbr@xxxxxxxxxxx>
Cc: Alexander Stein <alexander.stein@xxxxxxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/w1/slaves/w1_ds2433.c | 47 ++++++++++++++++++++-----------------------
1 file changed, 22 insertions(+), 25 deletions(-)

diff --git a/drivers/w1/slaves/w1_ds2433.c b/drivers/w1/slaves/w1_ds2433.c
index 10cc1b61..72319a96 100644
--- a/drivers/w1/slaves/w1_ds2433.c
+++ b/drivers/w1/slaves/w1_ds2433.c
@@ -93,9 +93,9 @@ static int w1_f23_refresh_block(struct w1_slave *sl, struct w1_f23_data *data,
}
#endif /* CONFIG_W1_SLAVE_DS2433_CRC */

-static ssize_t w1_f23_read_bin(struct file *filp, struct kobject *kobj,
- struct bin_attribute *bin_attr,
- char *buf, loff_t off, size_t count)
+static ssize_t eeprom_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);
#ifdef CONFIG_W1_SLAVE_DS2433_CRC
@@ -207,9 +207,9 @@ static int w1_f23_write(struct w1_slave *sl, int addr, int len, const u8 *data)
return 0;
}

-static ssize_t w1_f23_write_bin(struct file *filp, struct kobject *kobj,
- struct bin_attribute *bin_attr,
- char *buf, loff_t off, size_t count)
+static ssize_t eeprom_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);
int addr, len, idx;
@@ -257,19 +257,24 @@ out_up:
return count;
}

-static struct bin_attribute w1_f23_bin_attr = {
- .attr = {
- .name = "eeprom",
- .mode = S_IRUGO | S_IWUSR,
- },
- .size = W1_EEPROM_SIZE,
- .read = w1_f23_read_bin,
- .write = w1_f23_write_bin,
+static BIN_ATTR_RW(eeprom, W1_EEPROM_SIZE);
+
+static struct bin_attribute *w1_f23_bin_attributes[] = {
+ &bin_attr_eeprom,
+ NULL,
+};
+
+static const struct attribute_group w1_f23_group = {
+ .bin_attrs = w1_f23_bin_attributes,
+};
+
+static const struct attribute_group *w1_f23_groups[] = {
+ &w1_f23_group,
+ NULL,
};

static int w1_f23_add_slave(struct w1_slave *sl)
{
- int err;
#ifdef CONFIG_W1_SLAVE_DS2433_CRC
struct w1_f23_data *data;

@@ -279,15 +284,7 @@ static int w1_f23_add_slave(struct w1_slave *sl)
sl->family_data = data;

#endif /* CONFIG_W1_SLAVE_DS2433_CRC */
-
- err = sysfs_create_bin_file(&sl->dev.kobj, &w1_f23_bin_attr);
-
-#ifdef CONFIG_W1_SLAVE_DS2433_CRC
- if (err)
- kfree(data);
-#endif /* CONFIG_W1_SLAVE_DS2433_CRC */
-
- return err;
+ return 0;
}

static void w1_f23_remove_slave(struct w1_slave *sl)
@@ -296,12 +293,12 @@ static void w1_f23_remove_slave(struct w1_slave *sl)
kfree(sl->family_data);
sl->family_data = NULL;
#endif /* CONFIG_W1_SLAVE_DS2433_CRC */
- sysfs_remove_bin_file(&sl->dev.kobj, &w1_f23_bin_attr);
}

static struct w1_family_ops w1_f23_fops = {
.add_slave = w1_f23_add_slave,
.remove_slave = w1_f23_remove_slave,
+ .groups = w1_f23_groups,
};

static struct w1_family w1_family_23 = {
--
1.8.3.rc0.20.gb99dd2e

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