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Commit 408c15ea authored by Guenter Roeck's avatar Guenter Roeck
Browse files

hwmon: (lm95245) Fix hysteresis temperatures 



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

Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
Reviewed-by: default avatarJean Delvare <jdelvare@suse.de>
parent 7981c584

drivers/hwmon/lm95245.c

+21 −10
Original line number Diff line number Diff line
@@ -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,