hwmon: (lm75) Convert to use new hwmon registration API
Simplify code and reduce code size by using the new hwmon registration API. Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
parent
2ca492e22c
commit
08b0243381
|
@ -969,7 +969,6 @@ config SENSORS_LM73
|
|||
config SENSORS_LM75
|
||||
tristate "National Semiconductor LM75 and compatibles"
|
||||
depends on I2C
|
||||
depends on THERMAL || !THERMAL_OF
|
||||
select REGMAP_I2C
|
||||
help
|
||||
If you say yes here you get support for one common type of
|
||||
|
|
|
@ -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;
|
||||
unsigned int regval;
|
||||
int err, reg;
|
||||
|
||||
err = regmap_read(data->regmap, LM75_REG_TEMP, &_temp);
|
||||
if (err < 0)
|
||||
return err;
|
||||
|
||||
*temp = lm75_reg_to_mc(_temp, data->resolution);
|
||||
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;
|
||||
|
||||
error = kstrtol(buf, 10, &temp);
|
||||
if (error)
|
||||
return error;
|
||||
if (type != hwmon_temp)
|
||||
return -EINVAL;
|
||||
|
||||
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;
|
||||
|
@ -145,46 +163,78 @@ 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,
|
||||
|
||||
NULL
|
||||
};
|
||||
ATTRIBUTE_GROUPS(lm75);
|
||||
|
||||
static const struct thermal_zone_of_device_ops lm75_of_thermal_ops = {
|
||||
.get_temp = lm75_read_temp,
|
||||
};
|
||||
|
||||
/*-----------------------------------------------------------------------*/
|
||||
|
||||
/* device probe and removal */
|
||||
|
||||
/* chip configuration */
|
||||
|
||||
static const u32 lm75_chip_config[] = {
|
||||
HWMON_C_REGISTER_TZ | HWMON_C_UPDATE_INTERVAL,
|
||||
0
|
||||
};
|
||||
|
||||
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
|
||||
};
|
||||
|
||||
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)
|
||||
{
|
||||
return reg != LM75_REG_TEMP;
|
||||
|
@ -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;
|
||||
|
|
Loading…
Reference in New Issue