diff options
Diffstat (limited to 'drivers/hwmon/lm90.c')
| -rw-r--r-- | drivers/hwmon/lm90.c | 39 |
1 files changed, 30 insertions, 9 deletions
diff --git a/drivers/hwmon/lm90.c b/drivers/hwmon/lm90.c index af541d67245..960df9fa75a 100644 --- a/drivers/hwmon/lm90.c +++ b/drivers/hwmon/lm90.c @@ -41,7 +41,8 @@ * http://www.maxim-ic.com/quick_view2.cfm/qv_pk/2578 * Note that there is no easy way to differentiate between the three * variants. The extra address and features of the MAX6659 are not - * supported by this driver. + * supported by this driver. These chips lack the remote temperature + * offset feature. * * This driver also supports the MAX6680 and MAX6681, two other sensor * chips made by Maxim. These are quite similar to the other Maxim @@ -214,7 +215,7 @@ static struct i2c_driver lm90_driver = { struct lm90_data { struct i2c_client client; - struct class_device *class_dev; + struct device *hwmon_dev; struct mutex update_lock; char valid; /* zero until following fields are valid */ unsigned long last_updated; /* in jiffies */ @@ -226,9 +227,10 @@ struct lm90_data { 2: local high limit 3: local critical limit 4: remote critical limit */ - s16 temp11[3]; /* 0: remote input + s16 temp11[4]; /* 0: remote input 1: remote low limit - 2: remote high limit */ + 2: remote high limit + 3: remote offset (except max6657) */ u8 temp_hyst; u8 alarms; /* bitvector */ }; @@ -282,11 +284,13 @@ static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr, static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr, const char *buf, size_t count) { - static const u8 reg[4] = { + static const u8 reg[6] = { LM90_REG_W_REMOTE_LOWH, LM90_REG_W_REMOTE_LOWL, LM90_REG_W_REMOTE_HIGHH, LM90_REG_W_REMOTE_HIGHL, + LM90_REG_W_REMOTE_OFFSH, + LM90_REG_W_REMOTE_OFFSL, }; struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); @@ -367,6 +371,8 @@ static SENSOR_DEVICE_ATTR(temp2_crit, S_IWUSR | S_IRUGO, show_temp8, static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temphyst, set_temphyst, 3); static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IRUGO, show_temphyst, NULL, 4); +static SENSOR_DEVICE_ATTR(temp2_offset, S_IWUSR | S_IRUGO, show_temp11, + set_temp11, 3); /* Individual alarm files */ static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 0); @@ -652,10 +658,15 @@ static int lm90_detect(struct i2c_adapter *adapter, int address, int kind) &dev_attr_pec))) goto exit_remove_files; } + if (data->kind != max6657) { + if ((err = device_create_file(&new_client->dev, + &sensor_dev_attr_temp2_offset.dev_attr))) + goto exit_remove_files; + } - data->class_dev = hwmon_device_register(&new_client->dev); - if (IS_ERR(data->class_dev)) { - err = PTR_ERR(data->class_dev); + data->hwmon_dev = hwmon_device_register(&new_client->dev); + if (IS_ERR(data->hwmon_dev)) { + err = PTR_ERR(data->hwmon_dev); goto exit_remove_files; } @@ -707,9 +718,12 @@ static int lm90_detach_client(struct i2c_client *client) struct lm90_data *data = i2c_get_clientdata(client); int err; - hwmon_device_unregister(data->class_dev); + hwmon_device_unregister(data->hwmon_dev); sysfs_remove_group(&client->dev.kobj, &lm90_group); device_remove_file(&client->dev, &dev_attr_pec); + if (data->kind != max6657) + device_remove_file(&client->dev, + &sensor_dev_attr_temp2_offset.dev_attr); if ((err = i2c_detach_client(client))) return err; @@ -763,6 +777,13 @@ static struct lm90_data *lm90_update_device(struct device *dev) if (lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHH, &newh) == 0 && lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHL, &l) == 0) data->temp11[2] = (newh << 8) | l; + if (data->kind != max6657) { + if (lm90_read_reg(client, LM90_REG_R_REMOTE_OFFSH, + &newh) == 0 + && lm90_read_reg(client, LM90_REG_R_REMOTE_OFFSL, + &l) == 0) + data->temp11[3] = (newh << 8) | l; + } lm90_read_reg(client, LM90_REG_R_STATUS, &data->alarms); data->last_updated = jiffies; |