hwmon: (lm92) Convert to with_info hwmon API

Convert driver to with_info hwmon API to simplify the code and
to reduce its size.

No functional change.

Reviewed-by: Tzung-Bi Shih <tzungbi@kernel.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck 2024-07-16 21:46:43 -07:00
parent 1359590a5c
commit c21eced115

View File

@ -29,7 +29,6 @@
#include <linux/err.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/module.h>
@ -76,21 +75,6 @@ static inline u8 ALARMS_FROM_REG(s16 reg)
return reg & 0x0007;
}
enum temp_index {
t_input,
t_crit,
t_min,
t_max,
t_num_regs
};
static const u8 lm92_regs[t_num_regs] = {
[t_input] = LM92_REG_TEMP,
[t_crit] = LM92_REG_TEMP_CRIT,
[t_min] = LM92_REG_TEMP_LOW,
[t_max] = LM92_REG_TEMP_HIGH,
};
/* Client data (each client gets its own) */
struct lm92_data {
struct regmap *regmap;
@ -98,147 +82,209 @@ struct lm92_data {
int resolution;
};
/*
* Sysfs attributes and callback functions
*/
static ssize_t temp_show(struct device *dev, struct device_attribute *devattr,
char *buf)
static int lm92_temp_read(struct lm92_data *data, u32 attr, int channel, long *val)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct lm92_data *data = dev_get_drvdata(dev);
u32 temp;
int err;
err = regmap_read(data->regmap, lm92_regs[attr->index], &temp);
if (err)
return err;
return sprintf(buf, "%d\n", TEMP_FROM_REG(temp));
}
static ssize_t temp_store(struct device *dev,
struct device_attribute *devattr, const char *buf,
size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct lm92_data *data = dev_get_drvdata(dev);
struct regmap *regmap = data->regmap;
int nr = attr->index;
long val;
int err;
err = kstrtol(buf, 10, &val);
if (err)
return err;
err = regmap_write(regmap, lm92_regs[nr], TEMP_TO_REG(val, data->resolution));
if (err)
return err;
return count;
}
static ssize_t temp_hyst_show(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
u32 regs[2] = { lm92_regs[attr->index], LM92_REG_TEMP_HYST };
struct lm92_data *data = dev_get_drvdata(dev);
u16 regvals[2];
int err;
err = regmap_multi_reg_read(data->regmap, regs, regvals, 2);
if (err)
return err;
return sprintf(buf, "%d\n",
TEMP_FROM_REG(regvals[0]) - TEMP_FROM_REG(regvals[1]));
}
static ssize_t temp1_min_hyst_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
static u32 regs[2] = { LM92_REG_TEMP_LOW, LM92_REG_TEMP_HYST };
struct lm92_data *data = dev_get_drvdata(dev);
u16 regvals[2];
int err;
err = regmap_multi_reg_read(data->regmap, regs, regvals, 2);
if (err)
return err;
return sprintf(buf, "%d\n",
TEMP_FROM_REG(regvals[0]) + TEMP_FROM_REG(regvals[1]));
}
static ssize_t temp_hyst_store(struct device *dev,
struct device_attribute *devattr,
const char *buf, size_t count)
{
struct lm92_data *data = dev_get_drvdata(dev);
int reg = -1, hyst_reg = -1, alarm_bit = 0;
struct regmap *regmap = data->regmap;
u32 temp;
long val;
int err;
int ret;
err = kstrtol(buf, 10, &val);
if (err)
return err;
switch (attr) {
case hwmon_temp_input:
reg = LM92_REG_TEMP;
break;
case hwmon_temp_min:
reg = LM92_REG_TEMP_LOW;
break;
case hwmon_temp_max:
reg = LM92_REG_TEMP_HIGH;
break;
case hwmon_temp_crit:
reg = LM92_REG_TEMP_CRIT;
break;
case hwmon_temp_min_hyst:
hyst_reg = LM92_REG_TEMP_LOW;
break;
case hwmon_temp_max_hyst:
hyst_reg = LM92_REG_TEMP_HIGH;
break;
case hwmon_temp_crit_hyst:
hyst_reg = LM92_REG_TEMP_CRIT;
break;
case hwmon_temp_min_alarm:
alarm_bit = 0;
break;
case hwmon_temp_max_alarm:
alarm_bit = 1;
break;
case hwmon_temp_crit_alarm:
alarm_bit = 2;
break;
default:
return -EOPNOTSUPP;
}
if (reg >= 0) {
ret = regmap_read(regmap, reg, &temp);
if (ret < 0)
return ret;
*val = TEMP_FROM_REG(temp);
} else if (hyst_reg >= 0) {
u32 regs[2] = { hyst_reg, LM92_REG_TEMP_HYST };
u16 regvals[2];
val = clamp_val(val, -120000, 220000);
mutex_lock(&data->update_lock);
err = regmap_read(regmap, LM92_REG_TEMP_CRIT, &temp);
if (err)
goto unlock;
val = TEMP_TO_REG(TEMP_FROM_REG(temp) - val, data->resolution);
err = regmap_write(regmap, LM92_REG_TEMP_HYST, val);
ret = regmap_multi_reg_read(regmap, regs, regvals, 2);
if (ret)
return ret;
if (attr == hwmon_temp_min_hyst)
*val = TEMP_FROM_REG(regvals[0]) + TEMP_FROM_REG(regvals[1]);
else
*val = TEMP_FROM_REG(regvals[0]) - TEMP_FROM_REG(regvals[1]);
} else {
ret = regmap_read(regmap, LM92_REG_TEMP, &temp);
if (ret)
return ret;
*val = !!(temp & BIT(alarm_bit));
}
return 0;
}
static int lm92_chip_read(struct lm92_data *data, u32 attr, long *val)
{
u32 temp;
int ret;
switch (attr) {
case hwmon_chip_alarms:
ret = regmap_read(data->regmap, LM92_REG_TEMP, &temp);
if (ret)
return ret;
*val = ALARMS_FROM_REG(temp);
break;
default:
return -EOPNOTSUPP;
}
return 0;
}
static int lm92_read(struct device *dev, enum hwmon_sensor_types type, u32 attr,
int channel, long *val)
{
struct lm92_data *data = dev_get_drvdata(dev);
switch (type) {
case hwmon_chip:
return lm92_chip_read(data, attr, val);
case hwmon_temp:
return lm92_temp_read(data, attr, channel, val);
default:
return -EOPNOTSUPP;
}
}
static int lm92_temp_write(struct lm92_data *data, u32 attr, long val)
{
struct regmap *regmap = data->regmap;
int reg, err;
u32 temp;
switch (attr) {
case hwmon_temp_min:
reg = LM92_REG_TEMP_LOW;
break;
case hwmon_temp_max:
reg = LM92_REG_TEMP_HIGH;
break;
case hwmon_temp_crit:
reg = LM92_REG_TEMP_CRIT;
break;
case hwmon_temp_crit_hyst:
val = clamp_val(val, -120000, 220000);
mutex_lock(&data->update_lock);
err = regmap_read(regmap, LM92_REG_TEMP_CRIT, &temp);
if (err)
goto unlock;
val = TEMP_TO_REG(TEMP_FROM_REG(temp) - val, data->resolution);
err = regmap_write(regmap, LM92_REG_TEMP_HYST, val);
unlock:
mutex_unlock(&data->update_lock);
if (err)
mutex_unlock(&data->update_lock);
return err;
return count;
default:
return -EOPNOTSUPP;
}
return regmap_write(regmap, reg, TEMP_TO_REG(val, data->resolution));
}
static ssize_t alarms_show(struct device *dev, struct device_attribute *attr,
char *buf)
static int lm92_write(struct device *dev, enum hwmon_sensor_types type,
u32 attr, int channel, long val)
{
struct lm92_data *data = dev_get_drvdata(dev);
u32 temp;
int err;
err = regmap_read(data->regmap, LM92_REG_TEMP, &temp);
if (err)
return err;
return sprintf(buf, "%d\n", ALARMS_FROM_REG(temp));
switch (type) {
case hwmon_temp:
return lm92_temp_write(data, attr, val);
default:
return -EOPNOTSUPP;
}
}
static ssize_t alarm_show(struct device *dev, struct device_attribute *attr,
char *buf)
static umode_t lm92_is_visible(const void *_data, enum hwmon_sensor_types type,
u32 attr, int channel)
{
struct lm92_data *data = dev_get_drvdata(dev);
int bitnr = to_sensor_dev_attr(attr)->index;
u32 temp;
int err;
err = regmap_read(data->regmap, LM92_REG_TEMP, &temp);
if (err)
return err;
return sprintf(buf, "%d\n", (temp >> bitnr) & 1);
switch (type) {
case hwmon_chip:
switch (attr) {
case hwmon_chip_alarms:
return 0444;
default:
break;
}
break;
case hwmon_temp:
switch (attr) {
case hwmon_temp_min:
case hwmon_temp_max:
case hwmon_temp_crit:
case hwmon_temp_crit_hyst:
return 0644;
case hwmon_temp_input:
case hwmon_temp_min_hyst:
case hwmon_temp_max_hyst:
case hwmon_temp_min_alarm:
case hwmon_temp_max_alarm:
case hwmon_temp_crit_alarm:
return 0444;
default:
break;
}
break;
default:
break;
}
return 0;
}
static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, t_input);
static SENSOR_DEVICE_ATTR_RW(temp1_crit, temp, t_crit);
static SENSOR_DEVICE_ATTR_RW(temp1_crit_hyst, temp_hyst, t_crit);
static SENSOR_DEVICE_ATTR_RW(temp1_min, temp, t_min);
static DEVICE_ATTR_RO(temp1_min_hyst);
static SENSOR_DEVICE_ATTR_RW(temp1_max, temp, t_max);
static SENSOR_DEVICE_ATTR_RO(temp1_max_hyst, temp_hyst, t_max);
static DEVICE_ATTR_RO(alarms);
static SENSOR_DEVICE_ATTR_RO(temp1_crit_alarm, alarm, 2);
static SENSOR_DEVICE_ATTR_RO(temp1_min_alarm, alarm, 0);
static SENSOR_DEVICE_ATTR_RO(temp1_max_alarm, alarm, 1);
static const struct hwmon_channel_info * const lm92_info[] = {
HWMON_CHANNEL_INFO(chip, HWMON_C_ALARMS),
HWMON_CHANNEL_INFO(temp,
HWMON_T_INPUT |
HWMON_T_MIN | HWMON_T_MIN_HYST |
HWMON_T_MAX | HWMON_T_MAX_HYST |
HWMON_T_CRIT | HWMON_T_CRIT_HYST |
HWMON_T_MIN_ALARM | HWMON_T_MAX_ALARM |
HWMON_T_CRIT_ALARM),
NULL
};
static const struct hwmon_ops lm92_hwmon_ops = {
.is_visible = lm92_is_visible,
.read = lm92_read,
.write = lm92_write,
};
static const struct hwmon_chip_info lm92_chip_info = {
.ops = &lm92_hwmon_ops,
.info = lm92_info,
};
/*
* Detection and registration
@ -249,22 +295,6 @@ static int lm92_init_client(struct regmap *regmap)
return regmap_clear_bits(regmap, LM92_REG_CONFIG, 0x01);
}
static struct attribute *lm92_attrs[] = {
&sensor_dev_attr_temp1_input.dev_attr.attr,
&sensor_dev_attr_temp1_crit.dev_attr.attr,
&sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
&sensor_dev_attr_temp1_min.dev_attr.attr,
&dev_attr_temp1_min_hyst.attr,
&sensor_dev_attr_temp1_max.dev_attr.attr,
&sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
&dev_attr_alarms.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
};
ATTRIBUTE_GROUPS(lm92);
/* Return 0 if detection is successful, -ENODEV otherwise */
static int lm92_detect(struct i2c_client *new_client,
struct i2c_board_info *info)
@ -373,9 +403,8 @@ static int lm92_probe(struct i2c_client *client)
if (err)
return err;
hwmon_dev = devm_hwmon_device_register_with_groups(dev,
client->name,
data, lm92_groups);
hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name, data,
&lm92_chip_info, NULL);
return PTR_ERR_OR_ZERO(hwmon_dev);
}