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hwmon: (max1619) Fix critical alarm display 

The overtemperature status bit, which is used to display critical alarm status,
matches the output of the OVERT signal 1:1. If that signal is active-low, the
bit will read 1 if there is no alarm. It is therefore necessary to reverse
the bit in this case.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck 2014-04-19 09:15:38 -07:00
parent 175c490c9e
commit 628c6d27c0
1 changed files with 5 additions and 0 deletions
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5
drivers/hwmon/max1619.c
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@ -325,6 +325,7 @@ static struct max1619_data *max1619_update_device(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct max1619_data *data = i2c_get_clientdata(client);
int config;
mutex_lock(&data->update_lock);
@ -344,6 +345,10 @@ static struct max1619_data *max1619_update_device(struct device *dev)
MAX1619_REG_R_TCRIT_HYST);
data->alarms = i2c_smbus_read_byte_data(client,
MAX1619_REG_R_STATUS);
/* If OVERT polarity is low, reverse alarm bit */
config = i2c_smbus_read_byte_data(client, MAX1619_REG_R_CONFIG);
if (!(config & 0x20))
data->alarms ^= 0x02;
data->last_updated = jiffies;
data->valid = 1;