diff options
Diffstat (limited to 'drivers/hwmon/jc42.c')
| -rw-r--r-- | drivers/hwmon/jc42.c | 26 |
1 files changed, 16 insertions, 10 deletions
diff --git a/drivers/hwmon/jc42.c b/drivers/hwmon/jc42.c index e72ba5d2a82..e21e43c1315 100644 --- a/drivers/hwmon/jc42.c +++ b/drivers/hwmon/jc42.c @@ -57,7 +57,7 @@ static const unsigned short normal_i2c[] = { #define JC42_CFG_EVENT_LOCK (1 << 7) #define JC42_CFG_SHUTDOWN (1 << 8) #define JC42_CFG_HYST_SHIFT 9 -#define JC42_CFG_HYST_MASK 0x03 +#define JC42_CFG_HYST_MASK (0x03 << 9) /* Capabilities */ #define JC42_CAP_RANGE (1 << 2) @@ -287,8 +287,8 @@ static ssize_t show_temp_crit_hyst(struct device *dev, return PTR_ERR(data); temp = jc42_temp_from_reg(data->temp_crit); - hyst = jc42_hysteresis[(data->config >> JC42_CFG_HYST_SHIFT) - & JC42_CFG_HYST_MASK]; + hyst = jc42_hysteresis[(data->config & JC42_CFG_HYST_MASK) + >> JC42_CFG_HYST_SHIFT]; return sprintf(buf, "%d\n", temp - hyst); } @@ -302,8 +302,8 @@ static ssize_t show_temp_max_hyst(struct device *dev, return PTR_ERR(data); temp = jc42_temp_from_reg(data->temp_max); - hyst = jc42_hysteresis[(data->config >> JC42_CFG_HYST_SHIFT) - & JC42_CFG_HYST_MASK]; + hyst = jc42_hysteresis[(data->config & JC42_CFG_HYST_MASK) + >> JC42_CFG_HYST_SHIFT]; return sprintf(buf, "%d\n", temp - hyst); } @@ -362,8 +362,7 @@ static ssize_t set_temp_crit_hyst(struct device *dev, } mutex_lock(&data->update_lock); - data->config = (data->config - & ~(JC42_CFG_HYST_MASK << JC42_CFG_HYST_SHIFT)) + data->config = (data->config & ~JC42_CFG_HYST_MASK) | (hyst << JC42_CFG_HYST_SHIFT); err = i2c_smbus_write_word_swapped(client, JC42_REG_CONFIG, data->config); @@ -535,9 +534,16 @@ static int jc42_remove(struct i2c_client *client) struct jc42_data *data = i2c_get_clientdata(client); hwmon_device_unregister(data->hwmon_dev); sysfs_remove_group(&client->dev.kobj, &jc42_group); - if (data->config != data->orig_config) - i2c_smbus_write_word_swapped(client, JC42_REG_CONFIG, - data->orig_config); + + /* Restore original configuration except hysteresis */ + if ((data->config & ~JC42_CFG_HYST_MASK) != + (data->orig_config & ~JC42_CFG_HYST_MASK)) { + int config; + + config = (data->orig_config & ~JC42_CFG_HYST_MASK) + | (data->config & JC42_CFG_HYST_MASK); + i2c_smbus_write_word_swapped(client, JC42_REG_CONFIG, config); + } return 0; } |