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