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hwmon: (iio_hwmon) Convert to use hwmon_device_register_with_groups 

Simplify code and create name attribute automatically.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck 2013-12-01 19:33:16 -08:00
parent f809621e8c
commit 4b49cca36e
1 changed files with 12 additions and 25 deletions
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37
drivers/hwmon/iio_hwmon.c
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@ -31,6 +31,7 @@ struct iio_hwmon_state {
int num_channels;
struct device *hwmon_dev;
struct attribute_group attr_group;
const struct attribute_group *groups[2];
struct attribute **attrs;
};
@ -56,19 +57,6 @@ static ssize_t iio_hwmon_read_val(struct device *dev,
return sprintf(buf, "%d\n", result);
}
static ssize_t show_name(struct device *dev, struct device_attribute *attr,
char *buf)
{
const char *name = "iio_hwmon";
if (dev->of_node && dev->of_node->name)
name = dev->of_node->name;
return sprintf(buf, "%s\n", name);
}
static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
static int iio_hwmon_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@ -78,6 +66,10 @@ static int iio_hwmon_probe(struct platform_device *pdev)
int in_i = 1, temp_i = 1, curr_i = 1;
enum iio_chan_type type;
struct iio_channel *channels;
const char *name = "iio_hwmon";
if (dev->of_node && dev->of_node->name)
name = dev->of_node->name;
channels = iio_channel_get_all(dev);
if (IS_ERR(channels))
@ -96,7 +88,7 @@ static int iio_hwmon_probe(struct platform_device *pdev)
st->num_channels++;
st->attrs = devm_kzalloc(dev,
sizeof(*st->attrs) * (st->num_channels + 2),
sizeof(*st->attrs) * (st->num_channels + 1),
GFP_KERNEL);
if (st->attrs == NULL) {
ret = -ENOMEM;
@ -144,22 +136,18 @@ static int iio_hwmon_probe(struct platform_device *pdev)
a->index = i;
st->attrs[i] = &a->dev_attr.attr;
}
st->attrs[st->num_channels] = &dev_attr_name.attr;
st->attr_group.attrs = st->attrs;
platform_set_drvdata(pdev, st);
ret = sysfs_create_group(&dev->kobj, &st->attr_group);
if (ret < 0)
goto error_release_channels;
st->hwmon_dev = hwmon_device_register(dev);
st->attr_group.attrs = st->attrs;
st->groups[0] = &st->attr_group;
st->hwmon_dev = hwmon_device_register_with_groups(dev, name, st,
st->groups);
if (IS_ERR(st->hwmon_dev)) {
ret = PTR_ERR(st->hwmon_dev);
goto error_remove_group;
goto error_release_channels;
}
platform_set_drvdata(pdev, st);
return 0;
error_remove_group:
sysfs_remove_group(&dev->kobj, &st->attr_group);
error_release_channels:
iio_channel_release_all(channels);
return ret;
@ -170,7 +158,6 @@ static int iio_hwmon_remove(struct platform_device *pdev)
struct iio_hwmon_state *st = platform_get_drvdata(pdev);
hwmon_device_unregister(st->hwmon_dev);
sysfs_remove_group(&pdev->dev.kobj, &st->attr_group);
iio_channel_release_all(st->channels);
return 0;