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w1: slaves: w1_ds28e04: convert to use w1_family_ops.groups

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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>
This commit is contained in:
Greg Kroah-Hartman 2013-08-21 15:45:02 -07:00
parent 38f40982e1
commit fa33a65a9c
1 changed files with 42 additions and 70 deletions
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112
drivers/w1/slaves/w1_ds28e04.c
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@ -118,9 +118,9 @@ static int w1_f1C_read(struct w1_slave *sl, int addr, int len, char *data)
return w1_read_block(sl->master, data, len);
}
static ssize_t w1_f1C_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);
struct w1_f1C_data *data = sl->family_data;
@ -226,9 +226,9 @@ static int w1_f1C_write(struct w1_slave *sl, int addr, int len, const u8 *data)
return 0;
}
static ssize_t w1_f1C_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);
@ -280,9 +280,11 @@ out_up:
return count;
}
static ssize_t w1_f1C_read_pio(struct file *filp, struct kobject *kobj,
struct bin_attribute *bin_attr,
char *buf, loff_t off, size_t count)
static BIN_ATTR_RW(eeprom, W1_EEPROM_SIZE);
static ssize_t pio_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);
@ -299,9 +301,9 @@ static ssize_t w1_f1C_read_pio(struct file *filp, struct kobject *kobj,
return ret;
}
static ssize_t w1_f1C_write_pio(struct file *filp, struct kobject *kobj,
struct bin_attribute *bin_attr,
char *buf, loff_t off, size_t count)
static ssize_t pio_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);
@ -339,8 +341,10 @@ static ssize_t w1_f1C_write_pio(struct file *filp, struct kobject *kobj,
return count;
}
static ssize_t w1_f1C_show_crccheck(struct device *dev,
struct device_attribute *attr, char *buf)
static BIN_ATTR_RW(pio, 1);
static ssize_t crccheck_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
if (put_user(w1_enable_crccheck + 0x30, buf))
return -EFAULT;
@ -348,9 +352,8 @@ static ssize_t w1_f1C_show_crccheck(struct device *dev,
return sizeof(w1_enable_crccheck);
}
static ssize_t w1_f1C_store_crccheck(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
static ssize_t crccheck_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
char val;
@ -371,35 +374,31 @@ static ssize_t w1_f1C_store_crccheck(struct device *dev,
return sizeof(w1_enable_crccheck);
}
#define NB_SYSFS_BIN_FILES 2
static struct bin_attribute w1_f1C_bin_attr[NB_SYSFS_BIN_FILES] = {
{
.attr = {
.name = "eeprom",
.mode = S_IRUGO | S_IWUSR,
},
.size = W1_EEPROM_SIZE,
.read = w1_f1C_read_bin,
.write = w1_f1C_write_bin,
},
{
.attr = {
.name = "pio",
.mode = S_IRUGO | S_IWUSR,
},
.size = 1,
.read = w1_f1C_read_pio,
.write = w1_f1C_write_pio,
}
static DEVICE_ATTR_RW(crccheck);
static struct attribute *w1_f1C_attrs[] = {
&dev_attr_crccheck.attr,
NULL,
};
static DEVICE_ATTR(crccheck, S_IWUSR | S_IRUGO,
w1_f1C_show_crccheck, w1_f1C_store_crccheck);
static struct bin_attribute *w1_f1C_bin_attrs[] = {
&bin_attr_eeprom,
&bin_attr_pio,
NULL,
};
static const struct attribute_group w1_f1C_group = {
.attrs = w1_f1C_attrs,
.bin_attrs = w1_f1C_bin_attrs,
};
static const struct attribute_group *w1_f1C_groups[] = {
&w1_f1C_group,
NULL,
};
static int w1_f1C_add_slave(struct w1_slave *sl)
{
int err = 0;
int i;
struct w1_f1C_data *data = NULL;
if (w1_enable_crccheck) {
@ -409,46 +408,19 @@ static int w1_f1C_add_slave(struct w1_slave *sl)
sl->family_data = data;
}
/* create binary sysfs attributes */
for (i = 0; i < NB_SYSFS_BIN_FILES && !err; ++i)
err = sysfs_create_bin_file(
&sl->dev.kobj, &(w1_f1C_bin_attr[i]));
if (!err) {
/* create device attributes */
err = device_create_file(&sl->dev, &dev_attr_crccheck);
}
if (err) {
/* remove binary sysfs attributes */
for (i = 0; i < NB_SYSFS_BIN_FILES; ++i)
sysfs_remove_bin_file(
&sl->dev.kobj, &(w1_f1C_bin_attr[i]));
kfree(data);
}
return err;
return 0;
}
static void w1_f1C_remove_slave(struct w1_slave *sl)
{
int i;
kfree(sl->family_data);
sl->family_data = NULL;
/* remove device attributes */
device_remove_file(&sl->dev, &dev_attr_crccheck);
/* remove binary sysfs attributes */
for (i = 0; i < NB_SYSFS_BIN_FILES; ++i)
sysfs_remove_bin_file(&sl->dev.kobj, &(w1_f1C_bin_attr[i]));
}
static struct w1_family_ops w1_f1C_fops = {
.add_slave = w1_f1C_add_slave,
.remove_slave = w1_f1C_remove_slave,
.groups = w1_f1C_groups,
};
static struct w1_family w1_family_1C = {