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hwmon: (adt7470) Create functions for updating readings and limits
Split the body of adt7470_update_device() into two helper functions adt7470_update_sensors() and adt7470_update_limits(). Although neither of the new helpers returns an error yet lay the groundwork for propagating failures through to the sysfs readers. Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz> Link: https://lore.kernel.org/r/20201019223423.31488-2-chris.packham@alliedtelesis.co.nz Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Chris Packham
Guenter Roeck
parent
92bc2e1f82
commit
ad00a02e34
@ -270,37 +270,11 @@ static int adt7470_update_thread(void *p)
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return 0;
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}
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static struct adt7470_data *adt7470_update_device(struct device *dev)
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static int adt7470_update_sensors(struct adt7470_data *data)
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{
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struct adt7470_data *data = dev_get_drvdata(dev);
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struct i2c_client *client = data->client;
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unsigned long local_jiffies = jiffies;
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u8 cfg;
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int i;
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int need_sensors = 1;
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int need_limits = 1;
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/*
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* Figure out if we need to update the shadow registers.
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* Lockless means that we may occasionally report out of
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* date data.
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*/
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if (time_before(local_jiffies, data->sensors_last_updated +
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SENSOR_REFRESH_INTERVAL) &&
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data->sensors_valid)
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need_sensors = 0;
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if (time_before(local_jiffies, data->limits_last_updated +
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LIMIT_REFRESH_INTERVAL) &&
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data->limits_valid)
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need_limits = 0;
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if (!need_sensors && !need_limits)
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return data;
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mutex_lock(&data->lock);
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if (!need_sensors)
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goto no_sensor_update;
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if (!data->temperatures_probed)
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adt7470_read_temperatures(client, data);
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@ -352,12 +326,13 @@ static struct adt7470_data *adt7470_update_device(struct device *dev)
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data->alarms_mask = adt7470_read_word_data(client,
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ADT7470_REG_ALARM1_MASK);
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data->sensors_last_updated = local_jiffies;
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data->sensors_valid = 1;
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return 0;
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}
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no_sensor_update:
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if (!need_limits)
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goto out;
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static int adt7470_update_limits(struct adt7470_data *data)
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{
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struct i2c_client *client = data->client;
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int i;
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for (i = 0; i < ADT7470_TEMP_COUNT; i++) {
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data->temp_min[i] = i2c_smbus_read_byte_data(client,
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@ -382,12 +357,55 @@ no_sensor_update:
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ADT7470_REG_PWM_TMIN(i));
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}
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data->limits_last_updated = local_jiffies;
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data->limits_valid = 1;
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return 0;
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}
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static struct adt7470_data *adt7470_update_device(struct device *dev)
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{
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struct adt7470_data *data = dev_get_drvdata(dev);
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unsigned long local_jiffies = jiffies;
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int need_sensors = 1;
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int need_limits = 1;
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int err;
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/*
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* Figure out if we need to update the shadow registers.
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* Lockless means that we may occasionally report out of
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* date data.
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*/
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if (time_before(local_jiffies, data->sensors_last_updated +
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SENSOR_REFRESH_INTERVAL) &&
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data->sensors_valid)
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need_sensors = 0;
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if (time_before(local_jiffies, data->limits_last_updated +
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LIMIT_REFRESH_INTERVAL) &&
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data->limits_valid)
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need_limits = 0;
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if (!need_sensors && !need_limits)
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return data;
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mutex_lock(&data->lock);
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if (need_sensors) {
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err = adt7470_update_sensors(data);
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if (err < 0)
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goto out;
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data->sensors_last_updated = local_jiffies;
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data->sensors_valid = 1;
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}
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if (need_limits) {
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err = adt7470_update_limits(data);
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if (err < 0)
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goto out;
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data->limits_last_updated = local_jiffies;
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data->limits_valid = 1;
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}
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out:
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mutex_unlock(&data->lock);
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return data;
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return err < 0 ? ERR_PTR(err) : data;
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}
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static ssize_t auto_update_interval_show(struct device *dev,
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@ -395,6 +413,10 @@ static ssize_t auto_update_interval_show(struct device *dev,
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char *buf)
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{
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struct adt7470_data *data = adt7470_update_device(dev);
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if (IS_ERR(data))
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return PTR_ERR(data);
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return sprintf(buf, "%d\n", data->auto_update_interval);
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}
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@ -422,6 +444,10 @@ static ssize_t num_temp_sensors_show(struct device *dev,
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char *buf)
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{
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struct adt7470_data *data = adt7470_update_device(dev);
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if (IS_ERR(data))
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return PTR_ERR(data);
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return sprintf(buf, "%d\n", data->num_temp_sensors);
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}
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@ -451,6 +477,10 @@ static ssize_t temp_min_show(struct device *dev,
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct adt7470_data *data = adt7470_update_device(dev);
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if (IS_ERR(data))
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return PTR_ERR(data);
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return sprintf(buf, "%d\n", 1000 * data->temp_min[attr->index]);
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}
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@ -483,6 +513,10 @@ static ssize_t temp_max_show(struct device *dev,
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct adt7470_data *data = adt7470_update_device(dev);
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if (IS_ERR(data))
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return PTR_ERR(data);
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return sprintf(buf, "%d\n", 1000 * data->temp_max[attr->index]);
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}
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@ -515,6 +549,10 @@ static ssize_t temp_show(struct device *dev, struct device_attribute *devattr,
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct adt7470_data *data = adt7470_update_device(dev);
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if (IS_ERR(data))
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return PTR_ERR(data);
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return sprintf(buf, "%d\n", 1000 * data->temp[attr->index]);
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}
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@ -524,6 +562,9 @@ static ssize_t alarm_mask_show(struct device *dev,
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{
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struct adt7470_data *data = adt7470_update_device(dev);
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if (IS_ERR(data))
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return PTR_ERR(data);
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return sprintf(buf, "%x\n", data->alarms_mask);
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}
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@ -554,6 +595,9 @@ static ssize_t fan_max_show(struct device *dev,
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct adt7470_data *data = adt7470_update_device(dev);
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if (IS_ERR(data))
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return PTR_ERR(data);
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if (FAN_DATA_VALID(data->fan_max[attr->index]))
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return sprintf(buf, "%d\n",
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FAN_PERIOD_TO_RPM(data->fan_max[attr->index]));
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@ -590,6 +634,9 @@ static ssize_t fan_min_show(struct device *dev,
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct adt7470_data *data = adt7470_update_device(dev);
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if (IS_ERR(data))
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return PTR_ERR(data);
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if (FAN_DATA_VALID(data->fan_min[attr->index]))
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return sprintf(buf, "%d\n",
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FAN_PERIOD_TO_RPM(data->fan_min[attr->index]));
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@ -626,6 +673,9 @@ static ssize_t fan_show(struct device *dev, struct device_attribute *devattr,
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct adt7470_data *data = adt7470_update_device(dev);
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if (IS_ERR(data))
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return PTR_ERR(data);
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if (FAN_DATA_VALID(data->fan[attr->index]))
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return sprintf(buf, "%d\n",
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FAN_PERIOD_TO_RPM(data->fan[attr->index]));
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@ -637,6 +687,10 @@ static ssize_t force_pwm_max_show(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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struct adt7470_data *data = adt7470_update_device(dev);
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if (IS_ERR(data))
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return PTR_ERR(data);
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return sprintf(buf, "%d\n", data->force_pwm_max);
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}
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@ -670,6 +724,10 @@ static ssize_t pwm_show(struct device *dev, struct device_attribute *devattr,
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct adt7470_data *data = adt7470_update_device(dev);
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if (IS_ERR(data))
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return PTR_ERR(data);
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return sprintf(buf, "%d\n", data->pwm[attr->index]);
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}
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@ -763,6 +821,10 @@ static ssize_t pwm_max_show(struct device *dev,
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct adt7470_data *data = adt7470_update_device(dev);
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if (IS_ERR(data))
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return PTR_ERR(data);
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return sprintf(buf, "%d\n", data->pwm_max[attr->index]);
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}
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@ -794,6 +856,10 @@ static ssize_t pwm_min_show(struct device *dev,
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct adt7470_data *data = adt7470_update_device(dev);
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if (IS_ERR(data))
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return PTR_ERR(data);
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return sprintf(buf, "%d\n", data->pwm_min[attr->index]);
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}
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@ -825,6 +891,10 @@ static ssize_t pwm_tmax_show(struct device *dev,
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct adt7470_data *data = adt7470_update_device(dev);
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if (IS_ERR(data))
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return PTR_ERR(data);
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/* the datasheet says that tmax = tmin + 20C */
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return sprintf(buf, "%d\n", 1000 * (20 + data->pwm_tmin[attr->index]));
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}
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@ -834,6 +904,10 @@ static ssize_t pwm_tmin_show(struct device *dev,
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct adt7470_data *data = adt7470_update_device(dev);
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if (IS_ERR(data))
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return PTR_ERR(data);
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return sprintf(buf, "%d\n", 1000 * data->pwm_tmin[attr->index]);
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}
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@ -866,6 +940,10 @@ static ssize_t pwm_auto_show(struct device *dev,
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct adt7470_data *data = adt7470_update_device(dev);
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if (IS_ERR(data))
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return PTR_ERR(data);
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return sprintf(buf, "%d\n", 1 + data->pwm_automatic[attr->index]);
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}
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@ -911,8 +989,12 @@ static ssize_t pwm_auto_temp_show(struct device *dev,
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct adt7470_data *data = adt7470_update_device(dev);
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u8 ctrl = data->pwm_auto_temp[attr->index];
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u8 ctrl;
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if (IS_ERR(data))
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return PTR_ERR(data);
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ctrl = data->pwm_auto_temp[attr->index];
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if (ctrl)
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return sprintf(buf, "%d\n", 1 << (ctrl - 1));
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else
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