diff options
Diffstat (limited to 'drivers/hwmon/sht21.c')
| -rw-r--r-- | drivers/hwmon/sht21.c | 82 |
1 files changed, 22 insertions, 60 deletions
diff --git a/drivers/hwmon/sht21.c b/drivers/hwmon/sht21.c index 2e9f9570b6f8..84cdb1cf0fb4 100644 --- a/drivers/hwmon/sht21.c +++ b/drivers/hwmon/sht21.c @@ -45,7 +45,7 @@ * @humidity: cached humidity measurement value */ struct sht21 { - struct device *hwmon_dev; + struct i2c_client *client; struct mutex lock; char valid; unsigned long last_update; @@ -85,14 +85,15 @@ static inline int sht21_rh_ticks_to_per_cent_mille(int ticks) /** * sht21_update_measurements() - get updated measurements from device - * @client: I2C client device + * @dev: device * * Returns 0 on success, else negative errno. */ -static int sht21_update_measurements(struct i2c_client *client) +static int sht21_update_measurements(struct device *dev) { int ret = 0; - struct sht21 *sht21 = i2c_get_clientdata(client); + struct sht21 *sht21 = dev_get_drvdata(dev); + struct i2c_client *client = sht21->client; mutex_lock(&sht21->lock); /* @@ -133,9 +134,10 @@ static ssize_t sht21_show_temperature(struct device *dev, struct device_attribute *attr, char *buf) { - struct i2c_client *client = to_i2c_client(dev); - struct sht21 *sht21 = i2c_get_clientdata(client); - int ret = sht21_update_measurements(client); + struct sht21 *sht21 = dev_get_drvdata(dev); + int ret; + + ret = sht21_update_measurements(dev); if (ret < 0) return ret; return sprintf(buf, "%d\n", sht21->temperature); @@ -154,9 +156,10 @@ static ssize_t sht21_show_humidity(struct device *dev, struct device_attribute *attr, char *buf) { - struct i2c_client *client = to_i2c_client(dev); - struct sht21 *sht21 = i2c_get_clientdata(client); - int ret = sht21_update_measurements(client); + struct sht21 *sht21 = dev_get_drvdata(dev); + int ret; + + ret = sht21_update_measurements(dev); if (ret < 0) return ret; return sprintf(buf, "%d\n", sht21->humidity); @@ -168,30 +171,20 @@ static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, sht21_show_temperature, static SENSOR_DEVICE_ATTR(humidity1_input, S_IRUGO, sht21_show_humidity, NULL, 0); -static struct attribute *sht21_attributes[] = { +static struct attribute *sht21_attrs[] = { &sensor_dev_attr_temp1_input.dev_attr.attr, &sensor_dev_attr_humidity1_input.dev_attr.attr, NULL }; -static const struct attribute_group sht21_attr_group = { - .attrs = sht21_attributes, -}; +ATTRIBUTE_GROUPS(sht21); -/** - * sht21_probe() - probe device - * @client: I2C client device - * @id: device ID - * - * Called by the I2C core when an entry in the ID table matches a - * device's name. - * Returns 0 on success. - */ static int sht21_probe(struct i2c_client *client, const struct i2c_device_id *id) { + struct device *dev = &client->dev; + struct device *hwmon_dev; struct sht21 *sht21; - int err; if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WORD_DATA)) { @@ -200,47 +193,17 @@ static int sht21_probe(struct i2c_client *client, return -ENODEV; } - sht21 = devm_kzalloc(&client->dev, sizeof(*sht21), GFP_KERNEL); + sht21 = devm_kzalloc(dev, sizeof(*sht21), GFP_KERNEL); if (!sht21) return -ENOMEM; - i2c_set_clientdata(client, sht21); + sht21->client = client; mutex_init(&sht21->lock); - err = sysfs_create_group(&client->dev.kobj, &sht21_attr_group); - if (err) { - dev_dbg(&client->dev, "could not create sysfs files\n"); - return err; - } - sht21->hwmon_dev = hwmon_device_register(&client->dev); - if (IS_ERR(sht21->hwmon_dev)) { - dev_dbg(&client->dev, "unable to register hwmon device\n"); - err = PTR_ERR(sht21->hwmon_dev); - goto fail_remove_sysfs; - } - - dev_info(&client->dev, "initialized\n"); - - return 0; - -fail_remove_sysfs: - sysfs_remove_group(&client->dev.kobj, &sht21_attr_group); - return err; -} - -/** - * sht21_remove() - remove device - * @client: I2C client device - */ -static int sht21_remove(struct i2c_client *client) -{ - struct sht21 *sht21 = i2c_get_clientdata(client); - - hwmon_device_unregister(sht21->hwmon_dev); - sysfs_remove_group(&client->dev.kobj, &sht21_attr_group); - - return 0; + hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, + sht21, sht21_groups); + return PTR_ERR_OR_ZERO(hwmon_dev); } /* Device ID table */ @@ -253,7 +216,6 @@ MODULE_DEVICE_TABLE(i2c, sht21_id); static struct i2c_driver sht21_driver = { .driver.name = "sht21", .probe = sht21_probe, - .remove = sht21_remove, .id_table = sht21_id, }; |