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w1: add attribute groups to struct w1_family_ops

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This lets w1 slave drivers declare an attribute group, and not have to
create/destroy sysfs files directly.  All w1 slave drivers will be fixed
to use this field up in follow-on patches to this one.

Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman 2013-08-21 15:44:55 -07:00
parent 5b187b3c0e
commit 36c27a655a
2 changed files with 42 additions and 32 deletions
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73
drivers/w1/w1.c
View File

@ -124,9 +124,9 @@ ATTRIBUTE_GROUPS(w1_slave);
/* Default family */
static ssize_t w1_default_write(struct file *filp, struct kobject *kobj,
struct bin_attribute *bin_attr,
char *buf, loff_t off, size_t count)
static ssize_t rw_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);
@ -143,9 +143,9 @@ static ssize_t w1_default_write(struct file *filp, struct kobject *kobj,
return count;
}
static ssize_t w1_default_read(struct file *filp, struct kobject *kobj,
struct bin_attribute *bin_attr,
char *buf, loff_t off, size_t count)
static ssize_t rw_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);
@ -155,29 +155,24 @@ static ssize_t w1_default_read(struct file *filp, struct kobject *kobj,
return count;
}
static struct bin_attribute w1_default_attr = {
.attr = {
.name = "rw",
.mode = S_IRUGO | S_IWUSR,
},
.size = PAGE_SIZE,
.read = w1_default_read,
.write = w1_default_write,
static BIN_ATTR_RW(rw, PAGE_SIZE);
static struct bin_attribute *w1_slave_bin_attrs[] = {
&bin_attr_rw,
NULL,
};
static int w1_default_add_slave(struct w1_slave *sl)
{
return sysfs_create_bin_file(&sl->dev.kobj, &w1_default_attr);
}
static const struct attribute_group w1_slave_default_group = {
.bin_attrs = w1_slave_bin_attrs,
};
static void w1_default_remove_slave(struct w1_slave *sl)
{
sysfs_remove_bin_file(&sl->dev.kobj, &w1_default_attr);
}
static const struct attribute_group *w1_slave_default_groups[] = {
&w1_slave_default_group,
NULL,
};
static struct w1_family_ops w1_default_fops = {
.add_slave = w1_default_add_slave,
.remove_slave = w1_default_remove_slave,
.groups = w1_slave_default_groups,
};
static struct w1_family w1_default_family = {
@ -600,6 +595,7 @@ static int w1_bus_notify(struct notifier_block *nb, unsigned long action,
{
struct device *dev = data;
struct w1_slave *sl;
struct w1_family_ops *fops;
int err;
/*
@ -611,23 +607,36 @@ static int w1_bus_notify(struct notifier_block *nb, unsigned long action,
return 0;
sl = dev_to_w1_slave(dev);
fops = sl->family->fops;
switch (action) {
case BUS_NOTIFY_ADD_DEVICE:
/* if the family driver needs to initialize something... */
if (sl->family->fops && sl->family->fops->add_slave &&
((err = sl->family->fops->add_slave(sl)) < 0)) {
dev_err(&sl->dev,
"sysfs file creation for [%s] failed. err=%d\n",
dev_name(&sl->dev), err);
return err;
if (fops->add_slave) {
err = fops->add_slave(sl);
if (err < 0) {
dev_err(&sl->dev,
"add_slave() call failed. err=%d\n",
err);
return err;
}
}
if (fops->groups) {
err = sysfs_create_groups(&sl->dev.kobj, fops->groups);
if (err) {
dev_err(&sl->dev,
"sysfs group creation failed. err=%d\n",
err);
return err;
}
}
break;
case BUS_NOTIFY_DEL_DEVICE:
/* Remove our sysfs files */
if (sl->family->fops && sl->family->fops->remove_slave)
if (fops->remove_slave)
sl->family->fops->remove_slave(sl);
if (fops->groups)
sysfs_remove_groups(&sl->dev.kobj, fops->groups);
break;
}
return 0;

1
drivers/w1/w1_family.h
View File

@ -52,6 +52,7 @@ struct w1_family_ops
{
int (* add_slave)(struct w1_slave *);
void (* remove_slave)(struct w1_slave *);
const struct attribute_group **groups;
};
struct w1_family