diff options
| -rw-r--r-- | drivers/hwmon/jc42.c | 293 |
1 files changed, 149 insertions, 144 deletions
diff --git a/drivers/hwmon/jc42.c b/drivers/hwmon/jc42.c index 9d5f85f3384f..1bf22eff0b08 100644 --- a/drivers/hwmon/jc42.c +++ b/drivers/hwmon/jc42.c @@ -28,7 +28,6 @@ #include <linux/jiffies.h> #include <linux/i2c.h> #include <linux/hwmon.h> -#include <linux/hwmon-sysfs.h> #include <linux/err.h> #include <linux/mutex.h> #include <linux/of.h> @@ -254,170 +253,148 @@ abort: return ret; } -/* sysfs functions */ - -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 jc42_data *data = jc42_update_device(dev); - if (IS_ERR(data)) - return PTR_ERR(data); - return sprintf(buf, "%d\n", - jc42_temp_from_reg(data->temp[attr->index])); -} - -static ssize_t show_temp_hyst(struct device *dev, - struct device_attribute *devattr, char *buf) +static int jc42_read(struct device *dev, enum hwmon_sensor_types type, + u32 attr, int channel, long *val) { - struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct jc42_data *data = jc42_update_device(dev); int temp, hyst; if (IS_ERR(data)) return PTR_ERR(data); - temp = jc42_temp_from_reg(data->temp[attr->index]); - hyst = jc42_hysteresis[(data->config & JC42_CFG_HYST_MASK) - >> JC42_CFG_HYST_SHIFT]; - return sprintf(buf, "%d\n", temp - hyst); + switch (attr) { + case hwmon_temp_input: + *val = jc42_temp_from_reg(data->temp[t_input]); + return 0; + case hwmon_temp_min: + *val = jc42_temp_from_reg(data->temp[t_min]); + return 0; + case hwmon_temp_max: + *val = jc42_temp_from_reg(data->temp[t_max]); + return 0; + case hwmon_temp_crit: + *val = jc42_temp_from_reg(data->temp[t_crit]); + return 0; + case hwmon_temp_max_hyst: + temp = jc42_temp_from_reg(data->temp[t_max]); + hyst = jc42_hysteresis[(data->config & JC42_CFG_HYST_MASK) + >> JC42_CFG_HYST_SHIFT]; + *val = temp - hyst; + return 0; + case hwmon_temp_crit_hyst: + temp = jc42_temp_from_reg(data->temp[t_crit]); + hyst = jc42_hysteresis[(data->config & JC42_CFG_HYST_MASK) + >> JC42_CFG_HYST_SHIFT]; + *val = temp - hyst; + return 0; + case hwmon_temp_min_alarm: + *val = (data->temp[t_input] >> JC42_ALARM_MIN_BIT) & 1; + return 0; + case hwmon_temp_max_alarm: + *val = (data->temp[t_input] >> JC42_ALARM_MAX_BIT) & 1; + return 0; + case hwmon_temp_crit_alarm: + *val = (data->temp[t_input] >> JC42_ALARM_CRIT_BIT) & 1; + return 0; + default: + return -EOPNOTSUPP; + } } -static ssize_t set_temp(struct device *dev, struct device_attribute *devattr, - const char *buf, size_t count) +static int jc42_write(struct device *dev, enum hwmon_sensor_types type, + u32 attr, int channel, long val) { - struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct jc42_data *data = dev_get_drvdata(dev); - int err, ret = count; - int nr = attr->index; - long val; + struct i2c_client *client = data->client; + int diff, hyst; + int ret; - if (kstrtol(buf, 10, &val) < 0) - return -EINVAL; mutex_lock(&data->update_lock); - data->temp[nr] = jc42_temp_to_reg(val, data->extended); - err = i2c_smbus_write_word_swapped(data->client, temp_regs[nr], - data->temp[nr]); - if (err < 0) - ret = err; - mutex_unlock(&data->update_lock); - return ret; -} -/* - * JC42.4 compliant chips only support four hysteresis values. - * Pick best choice and go from there. - */ -static ssize_t set_temp_crit_hyst(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t count) -{ - struct jc42_data *data = dev_get_drvdata(dev); - long val; - int diff, hyst; - int err; - int ret = count; - - if (kstrtol(buf, 10, &val) < 0) - return -EINVAL; - - val = clamp_val(val, (data->extended ? JC42_TEMP_MIN_EXTENDED : - JC42_TEMP_MIN) - 6000, JC42_TEMP_MAX); - diff = jc42_temp_from_reg(data->temp[t_crit]) - val; - - hyst = 0; - if (diff > 0) { - if (diff < 2250) - hyst = 1; /* 1.5 degrees C */ - else if (diff < 4500) - hyst = 2; /* 3.0 degrees C */ - else - hyst = 3; /* 6.0 degrees C */ + switch (attr) { + case hwmon_temp_min: + data->temp[t_min] = jc42_temp_to_reg(val, data->extended); + ret = i2c_smbus_write_word_swapped(client, temp_regs[t_min], + data->temp[t_min]); + break; + case hwmon_temp_max: + data->temp[t_max] = jc42_temp_to_reg(val, data->extended); + ret = i2c_smbus_write_word_swapped(client, temp_regs[t_max], + data->temp[t_max]); + break; + case hwmon_temp_crit: + data->temp[t_crit] = jc42_temp_to_reg(val, data->extended); + ret = i2c_smbus_write_word_swapped(client, temp_regs[t_crit], + data->temp[t_crit]); + break; + case hwmon_temp_crit_hyst: + /* + * JC42.4 compliant chips only support four hysteresis values. + * Pick best choice and go from there. + */ + val = clamp_val(val, (data->extended ? JC42_TEMP_MIN_EXTENDED + : JC42_TEMP_MIN) - 6000, + JC42_TEMP_MAX); + diff = jc42_temp_from_reg(data->temp[t_crit]) - val; + hyst = 0; + if (diff > 0) { + if (diff < 2250) + hyst = 1; /* 1.5 degrees C */ + else if (diff < 4500) + hyst = 2; /* 3.0 degrees C */ + else + hyst = 3; /* 6.0 degrees C */ + } + data->config = (data->config & ~JC42_CFG_HYST_MASK) | + (hyst << JC42_CFG_HYST_SHIFT); + ret = i2c_smbus_write_word_swapped(data->client, + JC42_REG_CONFIG, + data->config); + break; + default: + ret = -EOPNOTSUPP; + break; } - mutex_lock(&data->update_lock); - data->config = (data->config & ~JC42_CFG_HYST_MASK) - | (hyst << JC42_CFG_HYST_SHIFT); - err = i2c_smbus_write_word_swapped(data->client, JC42_REG_CONFIG, - data->config); - if (err < 0) - ret = err; mutex_unlock(&data->update_lock); - return ret; -} -static ssize_t show_alarm(struct device *dev, - struct device_attribute *attr, char *buf) -{ - u16 bit = to_sensor_dev_attr(attr)->index; - struct jc42_data *data = jc42_update_device(dev); - u16 val; - - if (IS_ERR(data)) - return PTR_ERR(data); - - val = data->temp[t_input]; - if (bit != JC42_ALARM_CRIT_BIT && (data->config & JC42_CFG_CRIT_ONLY)) - val = 0; - return sprintf(buf, "%u\n", (val >> bit) & 1); + return ret; } -static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, t_input); -static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp, set_temp, t_crit); -static SENSOR_DEVICE_ATTR(temp1_min, S_IRUGO, show_temp, set_temp, t_min); -static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, show_temp, set_temp, t_max); - -static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IRUGO, show_temp_hyst, - set_temp_crit_hyst, t_crit); -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, - JC42_ALARM_CRIT_BIT); -static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_alarm, NULL, - JC42_ALARM_MIN_BIT); -static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, - JC42_ALARM_MAX_BIT); - -static struct attribute *jc42_attributes[] = { - &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_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, - NULL -}; - -static umode_t jc42_attribute_mode(struct kobject *kobj, - struct attribute *attr, int index) +static umode_t jc42_is_visible(const void *_data, enum hwmon_sensor_types type, + u32 attr, int channel) { - struct device *dev = container_of(kobj, struct device, kobj); - struct jc42_data *data = dev_get_drvdata(dev); + const struct jc42_data *data = _data; unsigned int config = data->config; - bool readonly; - - if (attr == &sensor_dev_attr_temp1_crit.dev_attr.attr) - readonly = config & JC42_CFG_TCRIT_LOCK; - else if (attr == &sensor_dev_attr_temp1_min.dev_attr.attr || - attr == &sensor_dev_attr_temp1_max.dev_attr.attr) - readonly = config & JC42_CFG_EVENT_LOCK; - else if (attr == &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr) - readonly = config & (JC42_CFG_EVENT_LOCK | JC42_CFG_TCRIT_LOCK); - else - readonly = true; - - return S_IRUGO | (readonly ? 0 : S_IWUSR); + umode_t mode = S_IRUGO; + + switch (attr) { + case hwmon_temp_min: + case hwmon_temp_max: + if (!(config & JC42_CFG_EVENT_LOCK)) + mode |= S_IWUSR; + break; + case hwmon_temp_crit: + if (!(config & JC42_CFG_TCRIT_LOCK)) + mode |= S_IWUSR; + break; + case hwmon_temp_crit_hyst: + if (!(config & (JC42_CFG_EVENT_LOCK | JC42_CFG_TCRIT_LOCK))) + mode |= S_IWUSR; + break; + case hwmon_temp_input: + case hwmon_temp_max_hyst: + case hwmon_temp_min_alarm: + case hwmon_temp_max_alarm: + case hwmon_temp_crit_alarm: + break; + default: + mode = 0; + break; + } + return mode; } -static const struct attribute_group jc42_group = { - .attrs = jc42_attributes, - .is_visible = jc42_attribute_mode, -}; -__ATTRIBUTE_GROUPS(jc42); - /* Return 0 if detection is successful, -ENODEV otherwise */ static int jc42_detect(struct i2c_client *client, struct i2c_board_info *info) { @@ -450,6 +427,34 @@ static int jc42_detect(struct i2c_client *client, struct i2c_board_info *info) return -ENODEV; } +static const u32 jc42_temp_config[] = { + HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | HWMON_T_CRIT | + HWMON_T_MAX_HYST | HWMON_T_CRIT_HYST | + HWMON_T_MIN_ALARM | HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM, + 0 +}; + +static const struct hwmon_channel_info jc42_temp = { + .type = hwmon_temp, + .config = jc42_temp_config, +}; + +static const struct hwmon_channel_info *jc42_info[] = { + &jc42_temp, + NULL +}; + +static const struct hwmon_ops jc42_hwmon_ops = { + .is_visible = jc42_is_visible, + .read = jc42_read, + .write = jc42_write, +}; + +static const struct hwmon_chip_info jc42_chip_info = { + .ops = &jc42_hwmon_ops, + .info = jc42_info, +}; + static int jc42_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct device *dev = &client->dev; @@ -482,9 +487,9 @@ static int jc42_probe(struct i2c_client *client, const struct i2c_device_id *id) } data->config = config; - hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, - data, - jc42_groups); + hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name, + data, &jc42_chip_info, + NULL); return PTR_ERR_OR_ZERO(hwmon_dev); } |