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hwmon: (max16065) Convert to use devm_hwmon_device_register_with_groups 

Modify code to use is_visible to determine if an attribute should be created
or not, then use devm_hwmon_device_register_with_groups to create the hwmon
device and all attributes in one operation.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck 2013-09-02 11:31:28 -07:00
parent 8d3735522f
commit 38c75dc36d
1 changed files with 52 additions and 72 deletions
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124
drivers/hwmon/max16065.c
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@ -83,7 +83,8 @@ static const bool max16065_have_current[] = {
struct max16065_data {
enum chips type;
struct device *hwmon_dev;
struct i2c_client *client;
const struct attribute_group *groups[4];
struct mutex update_lock;
bool valid;
unsigned long last_updated; /* in jiffies */
@ -144,8 +145,8 @@ static int max16065_read_adc(struct i2c_client *client, int reg)
static struct max16065_data *max16065_update_device(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct max16065_data *data = i2c_get_clientdata(client);
struct max16065_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
mutex_lock(&data->update_lock);
if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
@ -186,7 +187,7 @@ static ssize_t max16065_show_alarm(struct device *dev,
val &= (1 << attr2->index);
if (val)
i2c_smbus_write_byte_data(to_i2c_client(dev),
i2c_smbus_write_byte_data(data->client,
MAX16065_FAULT(attr2->nr), val);
return snprintf(buf, PAGE_SIZE, "%d\n", !!val);
@ -223,8 +224,7 @@ static ssize_t max16065_set_limit(struct device *dev,
const char *buf, size_t count)
{
struct sensor_device_attribute_2 *attr2 = to_sensor_dev_attr_2(da);
struct i2c_client *client = to_i2c_client(dev);
struct max16065_data *data = i2c_get_clientdata(client);
struct max16065_data *data = dev_get_drvdata(dev);
unsigned long val;
int err;
int limit;
@ -238,7 +238,7 @@ static ssize_t max16065_set_limit(struct device *dev,
mutex_lock(&data->update_lock);
data->limit[attr2->nr][attr2->index]
= LIMIT_TO_MV(limit, data->range[attr2->index]);
i2c_smbus_write_byte_data(client,
i2c_smbus_write_byte_data(data->client,
MAX16065_LIMIT(attr2->nr, attr2->index),
limit);
mutex_unlock(&data->update_lock);
@ -250,8 +250,7 @@ static ssize_t max16065_show_limit(struct device *dev,
struct device_attribute *da, char *buf)
{
struct sensor_device_attribute_2 *attr2 = to_sensor_dev_attr_2(da);
struct i2c_client *client = to_i2c_client(dev);
struct max16065_data *data = i2c_get_clientdata(client);
struct max16065_data *data = dev_get_drvdata(dev);
return snprintf(buf, PAGE_SIZE, "%d\n",
data->limit[attr2->nr][attr2->index]);
@ -516,8 +515,32 @@ static struct attribute *max16065_max_attributes[] = {
NULL
};
static umode_t max16065_basic_is_visible(struct kobject *kobj,
struct attribute *a, int n)
{
struct device *dev = container_of(kobj, struct device, kobj);
struct max16065_data *data = dev_get_drvdata(dev);
int index = n / 4;
if (index >= data->num_adc || !data->range[index])
return 0;
return a->mode;
}
static umode_t max16065_secondary_is_visible(struct kobject *kobj,
struct attribute *a, int index)
{
struct device *dev = container_of(kobj, struct device, kobj);
struct max16065_data *data = dev_get_drvdata(dev);
if (index >= data->num_adc)
return 0;
return a->mode;
}
static const struct attribute_group max16065_basic_group = {
.attrs = max16065_basic_attributes,
.is_visible = max16065_basic_is_visible,
};
static const struct attribute_group max16065_current_group = {
@ -526,38 +549,35 @@ static const struct attribute_group max16065_current_group = {
static const struct attribute_group max16065_min_group = {
.attrs = max16065_min_attributes,
.is_visible = max16065_secondary_is_visible,
};
static const struct attribute_group max16065_max_group = {
.attrs = max16065_max_attributes,
.is_visible = max16065_secondary_is_visible,
};
static void max16065_cleanup(struct i2c_client *client)
{
sysfs_remove_group(&client->dev.kobj, &max16065_max_group);
sysfs_remove_group(&client->dev.kobj, &max16065_min_group);
sysfs_remove_group(&client->dev.kobj, &max16065_current_group);
sysfs_remove_group(&client->dev.kobj, &max16065_basic_group);
}
static int max16065_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct i2c_adapter *adapter = client->adapter;
struct max16065_data *data;
int i, j, val, ret;
struct device *dev = &client->dev;
struct device *hwmon_dev;
int i, j, val;
bool have_secondary; /* true if chip has secondary limits */
bool secondary_is_max = false; /* secondary limits reflect max */
int groups = 0;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA
| I2C_FUNC_SMBUS_READ_WORD_DATA))
return -ENODEV;
data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
if (unlikely(!data))
return -ENOMEM;
i2c_set_clientdata(client, data);
data->client = client;
mutex_init(&data->update_lock);
data->num_adc = max16065_num_adc[id->driver_data];
@ -596,38 +616,16 @@ static int max16065_probe(struct i2c_client *client,
}
}
/* Register sysfs hooks */
for (i = 0; i < data->num_adc * 4; i++) {
/* Do not create sysfs entry if channel is disabled */
if (!data->range[i / 4])
continue;
ret = sysfs_create_file(&client->dev.kobj,
max16065_basic_attributes[i]);
if (unlikely(ret))
goto out;
}
if (have_secondary) {
struct attribute **attr = secondary_is_max ?
max16065_max_attributes : max16065_min_attributes;
for (i = 0; i < data->num_adc; i++) {
if (!data->range[i])
continue;
ret = sysfs_create_file(&client->dev.kobj, attr[i]);
if (unlikely(ret))
goto out;
}
}
/* sysfs hooks */
data->groups[groups++] = &max16065_basic_group;
if (have_secondary)
data->groups[groups++] = secondary_is_max ?
&max16065_max_group : &max16065_min_group;
if (data->have_current) {
val = i2c_smbus_read_byte_data(client, MAX16065_CURR_CONTROL);
if (unlikely(val < 0)) {
ret = val;
goto out;
}
if (unlikely(val < 0))
return val;
if (val & MAX16065_CURR_ENABLE) {
/*
* Current gain is 6, 12, 24, 48 based on values in
@ -636,33 +634,16 @@ static int max16065_probe(struct i2c_client *client,
data->curr_gain = 6 << ((val >> 2) & 0x03);
data->range[MAX16065_NUM_ADC]
= max16065_csp_adc_range[(val >> 1) & 0x01];
ret = sysfs_create_group(&client->dev.kobj,
&max16065_current_group);
if (unlikely(ret))
goto out;
data->groups[groups++] = &max16065_current_group;
} else {
data->have_current = false;
}
}
data->hwmon_dev = hwmon_device_register(&client->dev);
if (unlikely(IS_ERR(data->hwmon_dev))) {
ret = PTR_ERR(data->hwmon_dev);
goto out;
}
return 0;
out:
max16065_cleanup(client);
return ret;
}
static int max16065_remove(struct i2c_client *client)
{
struct max16065_data *data = i2c_get_clientdata(client);
hwmon_device_unregister(data->hwmon_dev);
max16065_cleanup(client);
hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
data, data->groups);
if (unlikely(IS_ERR(hwmon_dev)))
return PTR_ERR(hwmon_dev);
return 0;
}
@ -685,7 +666,6 @@ static struct i2c_driver max16065_driver = {
.name = "max16065",
},
.probe = max16065_probe,
.remove = max16065_remove,
.id_table = max16065_id,
};