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hwmon: (lm95245) Fix hysteresis temperatures 

Hysteresis temperatures are defined as absolute temperatures,
not as delta value from the critical temperatures.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
This commit is contained in:
Guenter Roeck 2014-02-02 18:29:28 -08:00
parent 7981c5846a
commit 408c15eaca
1 changed files with 21 additions and 10 deletions
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31
drivers/hwmon/lm95245.c
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@ -272,27 +272,38 @@ static ssize_t set_limit(struct device *dev, struct device_attribute *attr,
return count;
}
static ssize_t show_crit_hyst(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct lm95245_data *data = lm95245_update_device(dev);
int index = to_sensor_dev_attr(attr)->index;
int hyst = data->regs[index] - data->regs[8];
return snprintf(buf, PAGE_SIZE - 1, "%d\n", hyst * 1000);
}
static ssize_t set_crit_hyst(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm95245_data *data = i2c_get_clientdata(client);
int index = to_sensor_dev_attr(attr)->index;
unsigned long val;
int hyst, limit;
if (kstrtoul(buf, 10, &val) < 0)
return -EINVAL;
val /= 1000;
val = clamp_val(val, 0, 31);
mutex_lock(&data->update_lock);
data->valid = 0;
limit = i2c_smbus_read_byte_data(client, lm95245_reg_address[index]);
hyst = limit - val / 1000;
hyst = clamp_val(hyst, 0, 31);
data->regs[8] = hyst;
/* shared crit hysteresis */
i2c_smbus_write_byte_data(client, LM95245_REG_RW_COMMON_HYSTERESIS,
val);
hyst);
mutex_unlock(&data->update_lock);
@ -378,16 +389,16 @@ static ssize_t set_interval(struct device *dev, struct device_attribute *attr,
static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_input, NULL, 0);
static SENSOR_DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_limit,
set_limit, 6);
static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_limit,
set_crit_hyst, 8);
static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_crit_hyst,
set_crit_hyst, 6);
static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL,
STATUS1_LOC);
static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_input, NULL, 2);
static SENSOR_DEVICE_ATTR(temp2_crit, S_IWUSR | S_IRUGO, show_limit,
set_limit, 7);
static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IWUSR | S_IRUGO, show_limit,
set_crit_hyst, 8);
static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IWUSR | S_IRUGO, show_crit_hyst,
set_crit_hyst, 7);
static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL,
STATUS1_RTCRIT);
static SENSOR_DEVICE_ATTR(temp2_type, S_IWUSR | S_IRUGO, show_type,