diff options
Diffstat (limited to 'drivers/hwmon/lm75.c')
| -rw-r--r-- | drivers/hwmon/lm75.c | 185 |
1 files changed, 116 insertions, 69 deletions
diff --git a/drivers/hwmon/lm75.c b/drivers/hwmon/lm75.c index 92f9d4bbf597..eff3b24d8473 100644 --- a/drivers/hwmon/lm75.c +++ b/drivers/hwmon/lm75.c @@ -28,7 +28,6 @@ #include <linux/err.h> #include <linux/of.h> #include <linux/regmap.h> -#include <linux/thermal.h> #include "lm75.h" @@ -88,56 +87,75 @@ static inline long lm75_reg_to_mc(s16 temp, u8 resolution) return ((temp >> (16 - resolution)) * 1000) >> (resolution - 8); } -/* sysfs attributes for hwmon */ - -static int lm75_read_temp(void *dev, int *temp) +static int lm75_read(struct device *dev, enum hwmon_sensor_types type, + u32 attr, int channel, long *val) { struct lm75_data *data = dev_get_drvdata(dev); - unsigned int _temp; - int err; - - err = regmap_read(data->regmap, LM75_REG_TEMP, &_temp); - if (err < 0) - return err; - - *temp = lm75_reg_to_mc(_temp, data->resolution); - + unsigned int regval; + int err, reg; + + switch (type) { + case hwmon_chip: + switch (attr) { + case hwmon_chip_update_interval: + *val = data->sample_time; + break;; + default: + return -EINVAL; + } + break; + case hwmon_temp: + switch (attr) { + case hwmon_temp_input: + reg = LM75_REG_TEMP; + break; + case hwmon_temp_max: + reg = LM75_REG_MAX; + break; + case hwmon_temp_max_hyst: + reg = LM75_REG_HYST; + break; + default: + return -EINVAL; + } + err = regmap_read(data->regmap, reg, ®val); + if (err < 0) + return err; + + *val = lm75_reg_to_mc(regval, data->resolution); + break; + default: + return -EINVAL; + } return 0; } -static ssize_t show_temp(struct device *dev, struct device_attribute *da, - char *buf) +static int lm75_write(struct device *dev, enum hwmon_sensor_types type, + u32 attr, int channel, long temp) { - struct sensor_device_attribute *attr = to_sensor_dev_attr(da); struct lm75_data *data = dev_get_drvdata(dev); - unsigned int temp = 0; - int err; - - err = regmap_read(data->regmap, attr->index, &temp); - if (err < 0) - return err; - - return sprintf(buf, "%ld\n", lm75_reg_to_mc(temp, data->resolution)); -} - -static ssize_t set_temp(struct device *dev, struct device_attribute *da, - const char *buf, size_t count) -{ - struct sensor_device_attribute *attr = to_sensor_dev_attr(da); - struct lm75_data *data = dev_get_drvdata(dev); - long temp; - int error; u8 resolution; + int reg; + + if (type != hwmon_temp) + return -EINVAL; - error = kstrtol(buf, 10, &temp); - if (error) - return error; + switch (attr) { + case hwmon_temp_max: + reg = LM75_REG_MAX; + break; + case hwmon_temp_max_hyst: + reg = LM75_REG_HYST; + break; + default: + return -EINVAL; + } /* * Resolution of limit registers is assumed to be the same as the * temperature input register resolution unless given explicitly. */ - if (attr->index && data->resolution_limits) + if (data->resolution_limits) resolution = data->resolution_limits; else resolution = data->resolution; @@ -145,45 +163,77 @@ static ssize_t set_temp(struct device *dev, struct device_attribute *da, temp = clamp_val(temp, LM75_TEMP_MIN, LM75_TEMP_MAX); temp = DIV_ROUND_CLOSEST(temp << (resolution - 8), 1000) << (16 - resolution); - error = regmap_write(data->regmap, attr->index, temp); - if (error < 0) - return error; - return count; + return regmap_write(data->regmap, reg, temp); } -static ssize_t show_update_interval(struct device *dev, - struct device_attribute *da, char *buf) +static umode_t lm75_is_visible(const void *data, enum hwmon_sensor_types type, + u32 attr, int channel) { - struct lm75_data *data = dev_get_drvdata(dev); - - return sprintf(buf, "%u\n", data->sample_time); + switch (type) { + case hwmon_chip: + switch (attr) { + case hwmon_chip_update_interval: + return S_IRUGO; + } + break; + case hwmon_temp: + switch (attr) { + case hwmon_temp_input: + return S_IRUGO; + case hwmon_temp_max: + case hwmon_temp_max_hyst: + return S_IRUGO | S_IWUSR; + } + break; + default: + break; + } + return 0; } -static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, - show_temp, set_temp, LM75_REG_MAX); -static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, - show_temp, set_temp, LM75_REG_HYST); -static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, LM75_REG_TEMP); -static DEVICE_ATTR(update_interval, S_IRUGO, show_update_interval, NULL); +/*-----------------------------------------------------------------------*/ -static struct attribute *lm75_attrs[] = { - &sensor_dev_attr_temp1_input.dev_attr.attr, - &sensor_dev_attr_temp1_max.dev_attr.attr, - &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, - &dev_attr_update_interval.attr, +/* device probe and removal */ - NULL +/* chip configuration */ + +static const u32 lm75_chip_config[] = { + HWMON_C_REGISTER_TZ | HWMON_C_UPDATE_INTERVAL, + 0 }; -ATTRIBUTE_GROUPS(lm75); -static const struct thermal_zone_of_device_ops lm75_of_thermal_ops = { - .get_temp = lm75_read_temp, +static const struct hwmon_channel_info lm75_chip = { + .type = hwmon_chip, + .config = lm75_chip_config, }; -/*-----------------------------------------------------------------------*/ +static const u32 lm75_temp_config[] = { + HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST, + 0 +}; -/* device probe and removal */ +static const struct hwmon_channel_info lm75_temp = { + .type = hwmon_temp, + .config = lm75_temp_config, +}; + +static const struct hwmon_channel_info *lm75_info[] = { + &lm75_chip, + &lm75_temp, + NULL +}; + +static const struct hwmon_ops lm75_hwmon_ops = { + .is_visible = lm75_is_visible, + .read = lm75_read, + .write = lm75_write, +}; + +static const struct hwmon_chip_info lm75_chip_info = { + .ops = &lm75_hwmon_ops, + .info = lm75_info, +}; static bool lm75_is_writeable_reg(struct device *dev, unsigned int reg) { @@ -337,15 +387,12 @@ lm75_probe(struct i2c_client *client, const struct i2c_device_id *id) dev_dbg(dev, "Config %02x\n", new); - hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, - data, lm75_groups); + hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name, + data, &lm75_chip_info, + NULL); if (IS_ERR(hwmon_dev)) return PTR_ERR(hwmon_dev); - devm_thermal_zone_of_sensor_register(hwmon_dev, 0, - hwmon_dev, - &lm75_of_thermal_ops); - dev_info(dev, "%s: sensor '%s'\n", dev_name(hwmon_dev), client->name); return 0; |