diff options
Diffstat (limited to 'drivers/hwmon/smsc47m1.c')
| -rw-r--r-- | drivers/hwmon/smsc47m1.c | 81 |
1 files changed, 62 insertions, 19 deletions
diff --git a/drivers/hwmon/smsc47m1.c b/drivers/hwmon/smsc47m1.c index 6c81b843d83..47132fd26b1 100644 --- a/drivers/hwmon/smsc47m1.c +++ b/drivers/hwmon/smsc47m1.c @@ -35,6 +35,7 @@ #include <linux/err.h> #include <linux/init.h> #include <linux/mutex.h> +#include <linux/sysfs.h> #include <asm/io.h> /* Address is autodetected, there is no default value */ @@ -347,6 +348,30 @@ fan_present(2); static DEVICE_ATTR(alarms, S_IRUGO, get_alarms, NULL); +/* Almost all sysfs files may or may not be created depending on the chip + setup so we create them individually. It is still convenient to define a + group to remove them all at once. */ +static struct attribute *smsc47m1_attributes[] = { + &dev_attr_fan1_input.attr, + &dev_attr_fan1_min.attr, + &dev_attr_fan1_div.attr, + &dev_attr_fan2_input.attr, + &dev_attr_fan2_min.attr, + &dev_attr_fan2_div.attr, + + &dev_attr_pwm1.attr, + &dev_attr_pwm1_enable.attr, + &dev_attr_pwm2.attr, + &dev_attr_pwm2_enable.attr, + + &dev_attr_alarms.attr, + NULL +}; + +static const struct attribute_group smsc47m1_group = { + .attrs = smsc47m1_attributes, +}; + static int __init smsc47m1_find(unsigned short *addr) { u8 val; @@ -429,7 +454,8 @@ static int smsc47m1_detect(struct i2c_adapter *adapter) pwm2 = (smsc47m1_read_value(new_client, SMSC47M1_REG_PPIN(1)) & 0x05) == 0x04; if (!(fan1 || fan2 || pwm1 || pwm2)) { - dev_warn(&new_client->dev, "Device is not configured, will not use\n"); + dev_warn(&adapter->dev, "Device at 0x%x is not configured, " + "will not use\n", new_client->addr); err = -ENODEV; goto error_free; } @@ -446,46 +472,62 @@ static int smsc47m1_detect(struct i2c_adapter *adapter) smsc47m1_update_device(&new_client->dev, 1); /* Register sysfs hooks */ - data->class_dev = hwmon_device_register(&new_client->dev); - if (IS_ERR(data->class_dev)) { - err = PTR_ERR(data->class_dev); - goto error_detach; - } - if (fan1) { - device_create_file(&new_client->dev, &dev_attr_fan1_input); - device_create_file(&new_client->dev, &dev_attr_fan1_min); - device_create_file(&new_client->dev, &dev_attr_fan1_div); + if ((err = device_create_file(&new_client->dev, + &dev_attr_fan1_input)) + || (err = device_create_file(&new_client->dev, + &dev_attr_fan1_min)) + || (err = device_create_file(&new_client->dev, + &dev_attr_fan1_div))) + goto error_remove_files; } else dev_dbg(&new_client->dev, "Fan 1 not enabled by hardware, " "skipping\n"); if (fan2) { - device_create_file(&new_client->dev, &dev_attr_fan2_input); - device_create_file(&new_client->dev, &dev_attr_fan2_min); - device_create_file(&new_client->dev, &dev_attr_fan2_div); + if ((err = device_create_file(&new_client->dev, + &dev_attr_fan2_input)) + || (err = device_create_file(&new_client->dev, + &dev_attr_fan2_min)) + || (err = device_create_file(&new_client->dev, + &dev_attr_fan2_div))) + goto error_remove_files; } else dev_dbg(&new_client->dev, "Fan 2 not enabled by hardware, " "skipping\n"); if (pwm1) { - device_create_file(&new_client->dev, &dev_attr_pwm1); - device_create_file(&new_client->dev, &dev_attr_pwm1_enable); + if ((err = device_create_file(&new_client->dev, + &dev_attr_pwm1)) + || (err = device_create_file(&new_client->dev, + &dev_attr_pwm1_enable))) + goto error_remove_files; } else dev_dbg(&new_client->dev, "PWM 1 not enabled by hardware, " "skipping\n"); if (pwm2) { - device_create_file(&new_client->dev, &dev_attr_pwm2); - device_create_file(&new_client->dev, &dev_attr_pwm2_enable); + if ((err = device_create_file(&new_client->dev, + &dev_attr_pwm2)) + || (err = device_create_file(&new_client->dev, + &dev_attr_pwm2_enable))) + goto error_remove_files; } else dev_dbg(&new_client->dev, "PWM 2 not enabled by hardware, " "skipping\n"); - device_create_file(&new_client->dev, &dev_attr_alarms); + if ((err = device_create_file(&new_client->dev, &dev_attr_alarms))) + goto error_remove_files; + + data->class_dev = hwmon_device_register(&new_client->dev); + if (IS_ERR(data->class_dev)) { + err = PTR_ERR(data->class_dev); + goto error_remove_files; + } return 0; -error_detach: +error_remove_files: + sysfs_remove_group(&new_client->dev.kobj, &smsc47m1_group); i2c_detach_client(new_client); error_free: kfree(data); @@ -500,6 +542,7 @@ static int smsc47m1_detach_client(struct i2c_client *client) int err; hwmon_device_unregister(data->class_dev); + sysfs_remove_group(&client->dev.kobj, &smsc47m1_group); if ((err = i2c_detach_client(client))) return err; |