diff options
| -rw-r--r-- | drivers/hwmon/lm77.c | 182 |
1 files changed, 75 insertions, 107 deletions
diff --git a/drivers/hwmon/lm77.c b/drivers/hwmon/lm77.c index 85e5b3355be4..ab1752a5b46f 100644 --- a/drivers/hwmon/lm77.c +++ b/drivers/hwmon/lm77.c @@ -43,17 +43,30 @@ static const unsigned short normal_i2c[] = { 0x48, 0x49, 0x4a, 0x4b, #define LM77_REG_TEMP_MIN 0x04 #define LM77_REG_TEMP_MAX 0x05 +enum temp_index { + t_input = 0, + t_crit, + t_min, + t_max, + t_hyst, + t_num_temp +}; + +static const u8 temp_regs[t_num_temp] = { + [t_input] = LM77_REG_TEMP, + [t_min] = LM77_REG_TEMP_MIN, + [t_max] = LM77_REG_TEMP_MAX, + [t_crit] = LM77_REG_TEMP_CRIT, + [t_hyst] = LM77_REG_TEMP_HYST, +}; + /* Each client has this additional data */ struct lm77_data { struct device *hwmon_dev; struct mutex update_lock; char valid; unsigned long last_updated; /* In jiffies */ - int temp_input; /* Temperatures */ - int temp_crit; - int temp_min; - int temp_max; - int temp_hyst; + int temp[t_num_temp]; /* index using temp_index */ u8 alarms; }; @@ -100,27 +113,18 @@ static struct lm77_data *lm77_update_device(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct lm77_data *data = i2c_get_clientdata(client); + int i; mutex_lock(&data->update_lock); if (time_after(jiffies, data->last_updated + HZ + HZ / 2) || !data->valid) { dev_dbg(&client->dev, "Starting lm77 update\n"); - data->temp_input = - LM77_TEMP_FROM_REG(lm77_read_value(client, - LM77_REG_TEMP)); - data->temp_hyst = - LM77_TEMP_FROM_REG(lm77_read_value(client, - LM77_REG_TEMP_HYST)); - data->temp_crit = - LM77_TEMP_FROM_REG(lm77_read_value(client, - LM77_REG_TEMP_CRIT)); - data->temp_min = - LM77_TEMP_FROM_REG(lm77_read_value(client, - LM77_REG_TEMP_MIN)); - data->temp_max = - LM77_TEMP_FROM_REG(lm77_read_value(client, - LM77_REG_TEMP_MAX)); + for (i = 0; i < t_num_temp; i++) { + data->temp[i] = + LM77_TEMP_FROM_REG(lm77_read_value(client, + temp_regs[i])); + } data->alarms = lm77_read_value(client, LM77_REG_TEMP) & 0x0007; data->last_updated = jiffies; @@ -134,89 +138,56 @@ static struct lm77_data *lm77_update_device(struct device *dev) /* sysfs stuff */ -/* read routines for temperature limits */ -#define show(value) \ -static ssize_t show_##value(struct device *dev, \ - struct device_attribute *attr, \ - char *buf) \ -{ \ - struct lm77_data *data = lm77_update_device(dev); \ - return sprintf(buf, "%d\n", data->value); \ -} - -show(temp_input); -show(temp_crit); -show(temp_min); -show(temp_max); - -/* read routines for hysteresis values */ -static ssize_t show_temp_crit_hyst(struct device *dev, - struct device_attribute *attr, char *buf) +static ssize_t show_temp(struct device *dev, struct device_attribute *devattr, + char *buf) { + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct lm77_data *data = lm77_update_device(dev); - return sprintf(buf, "%d\n", data->temp_crit - data->temp_hyst); -} -static ssize_t show_temp_min_hyst(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct lm77_data *data = lm77_update_device(dev); - return sprintf(buf, "%d\n", data->temp_min + data->temp_hyst); + + return sprintf(buf, "%d\n", data->temp[attr->index]); } -static ssize_t show_temp_max_hyst(struct device *dev, - struct device_attribute *attr, char *buf) + +static ssize_t show_temp_hyst(struct device *dev, + struct device_attribute *devattr, char *buf) { + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct lm77_data *data = lm77_update_device(dev); - return sprintf(buf, "%d\n", data->temp_max - data->temp_hyst); -} + int nr = attr->index; + int temp; -/* write routines */ -#define set(value, reg) \ -static ssize_t set_##value(struct device *dev, struct device_attribute *attr, \ - const char *buf, size_t count) \ -{ \ - struct i2c_client *client = to_i2c_client(dev); \ - struct lm77_data *data = i2c_get_clientdata(client); \ - long val; \ - int err = kstrtol(buf, 10, &val); \ - if (err) \ - return err; \ - \ - mutex_lock(&data->update_lock); \ - data->value = val; \ - lm77_write_value(client, reg, LM77_TEMP_TO_REG(data->value)); \ - mutex_unlock(&data->update_lock); \ - return count; \ -} + temp = nr == t_min ? data->temp[nr] + data->temp[t_hyst] : + data->temp[nr] - data->temp[t_hyst]; -set(temp_min, LM77_REG_TEMP_MIN); -set(temp_max, LM77_REG_TEMP_MAX); + return sprintf(buf, "%d\n", temp); +} -/* - * hysteresis is stored as a relative value on the chip, so it has to be - * converted first - */ -static ssize_t set_temp_crit_hyst(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t count) +static ssize_t set_temp(struct device *dev, struct device_attribute *devattr, + const char *buf, size_t count) { + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct i2c_client *client = to_i2c_client(dev); struct lm77_data *data = i2c_get_clientdata(client); - unsigned long val; + int nr = attr->index; + long val; int err; - err = kstrtoul(buf, 10, &val); + err = kstrtol(buf, 10, &val); if (err) return err; mutex_lock(&data->update_lock); - data->temp_hyst = data->temp_crit - val; - lm77_write_value(client, LM77_REG_TEMP_HYST, - LM77_TEMP_TO_REG(data->temp_hyst)); + data->temp[nr] = val; + lm77_write_value(client, temp_regs[nr], LM77_TEMP_TO_REG(val)); mutex_unlock(&data->update_lock); return count; } -static ssize_t set_temp_crit(struct device *dev, struct device_attribute *attr, +/* + * hysteresis is stored as a relative value on the chip, so it has to be + * converted first. + */ +static ssize_t set_temp_hyst(struct device *dev, + struct device_attribute *devattr, const char *buf, size_t count) { struct i2c_client *client = to_i2c_client(dev); @@ -229,9 +200,9 @@ static ssize_t set_temp_crit(struct device *dev, struct device_attribute *attr, return err; mutex_lock(&data->update_lock); - data->temp_crit = val; - lm77_write_value(client, LM77_REG_TEMP_CRIT, - LM77_TEMP_TO_REG(data->temp_crit)); + data->temp[t_hyst] = data->temp[t_crit] - val; + lm77_write_value(client, LM77_REG_TEMP_HYST, + LM77_TEMP_TO_REG(data->temp[t_hyst])); mutex_unlock(&data->update_lock); return count; } @@ -244,34 +215,31 @@ static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); } -static DEVICE_ATTR(temp1_input, S_IRUGO, - show_temp_input, NULL); -static DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, - show_temp_crit, set_temp_crit); -static DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, - show_temp_min, set_temp_min); -static DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, - show_temp_max, set_temp_max); - -static DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, - show_temp_crit_hyst, set_temp_crit_hyst); -static DEVICE_ATTR(temp1_min_hyst, S_IRUGO, - show_temp_min_hyst, NULL); -static DEVICE_ATTR(temp1_max_hyst, S_IRUGO, - show_temp_max_hyst, NULL); +static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, t_input); +static SENSOR_DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp, set_temp, + t_crit); +static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp, set_temp, + t_min); +static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp, set_temp, + t_max); + +static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temp_hyst, + set_temp_hyst, t_crit); +static SENSOR_DEVICE_ATTR(temp1_min_hyst, S_IRUGO, show_temp_hyst, NULL, t_min); +static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO, show_temp_hyst, NULL, t_max); static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 2); static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_alarm, NULL, 0); static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 1); static struct attribute *lm77_attributes[] = { - &dev_attr_temp1_input.attr, - &dev_attr_temp1_crit.attr, - &dev_attr_temp1_min.attr, - &dev_attr_temp1_max.attr, - &dev_attr_temp1_crit_hyst.attr, - &dev_attr_temp1_min_hyst.attr, - &dev_attr_temp1_max_hyst.attr, + &sensor_dev_attr_temp1_input.dev_attr.attr, + &sensor_dev_attr_temp1_crit.dev_attr.attr, + &sensor_dev_attr_temp1_min.dev_attr.attr, + &sensor_dev_attr_temp1_max.dev_attr.attr, + &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr, + &sensor_dev_attr_temp1_min_hyst.dev_attr.attr, + &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, &sensor_dev_attr_temp1_min_alarm.dev_attr.attr, &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, |