#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 "lm75.h"
/* Many LM75 constants specified below */
/* The LM75 registers */
-#define LM75_REG_TEMP 0x00
#define LM75_REG_CONF 0x01
-#define LM75_REG_TEMP_HYST 0x02
-#define LM75_REG_TEMP_OS 0x03
+static const u8 LM75_REG_TEMP[3] = {
+ 0x00, /* input */
+ 0x03, /* max */
+ 0x02, /* hyst */
+};
/* Each client has this additional data */
struct lm75_data {
struct i2c_client client;
- struct class_device *class_dev;
- struct semaphore update_lock;
+ struct device *hwmon_dev;
+ struct mutex update_lock;
char valid; /* !=0 if following fields are valid */
unsigned long last_updated; /* In jiffies */
- u16 temp_input; /* Register values */
- u16 temp_max;
- u16 temp_hyst;
+ u16 temp[3]; /* Register values,
+ 0 = input
+ 1 = max
+ 2 = hyst */
};
static int lm75_attach_adapter(struct i2c_adapter *adapter);
.detach_client = lm75_detach_client,
};
-#define show(value) \
-static ssize_t show_##value(struct device *dev, struct device_attribute *attr, char *buf) \
-{ \
- struct lm75_data *data = lm75_update_device(dev); \
- return sprintf(buf, "%d\n", LM75_TEMP_FROM_REG(data->value)); \
+static ssize_t show_temp(struct device *dev, struct device_attribute *da,
+ char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
+ struct lm75_data *data = lm75_update_device(dev);
+ return sprintf(buf, "%d\n",
+ LM75_TEMP_FROM_REG(data->temp[attr->index]));
}
-show(temp_max);
-show(temp_hyst);
-show(temp_input);
-
-#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 lm75_data *data = i2c_get_clientdata(client); \
- int temp = simple_strtoul(buf, NULL, 10); \
- \
- down(&data->update_lock); \
- data->value = LM75_TEMP_TO_REG(temp); \
- lm75_write_value(client, reg, data->value); \
- up(&data->update_lock); \
- return count; \
+
+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 i2c_client *client = to_i2c_client(dev);
+ struct lm75_data *data = i2c_get_clientdata(client);
+ int nr = attr->index;
+ long temp = simple_strtol(buf, NULL, 10);
+
+ mutex_lock(&data->update_lock);
+ data->temp[nr] = LM75_TEMP_TO_REG(temp);
+ lm75_write_value(client, LM75_REG_TEMP[nr], data->temp[nr]);
+ mutex_unlock(&data->update_lock);
+ return count;
}
-set(temp_max, LM75_REG_TEMP_OS);
-set(temp_hyst, LM75_REG_TEMP_HYST);
-static DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_max, set_temp_max);
-static DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, show_temp_hyst, set_temp_hyst);
-static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input, NULL);
+static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO,
+ show_temp, set_temp, 1);
+static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO,
+ show_temp, set_temp, 2);
+static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
static int lm75_attach_adapter(struct i2c_adapter *adapter)
{
return i2c_probe(adapter, &addr_data, lm75_detect);
}
+static struct attribute *lm75_attributes[] = {
+ &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,
+
+ NULL
+};
+
+static const struct attribute_group lm75_group = {
+ .attrs = lm75_attributes,
+};
+
/* This function is called by i2c_probe */
static int lm75_detect(struct i2c_adapter *adapter, int address, int kind)
{
/* Fill in the remaining client fields and put it into the global list */
strlcpy(new_client->name, name, I2C_NAME_SIZE);
data->valid = 0;
- init_MUTEX(&data->update_lock);
+ mutex_init(&data->update_lock);
/* Tell the I2C layer a new client has arrived */
if ((err = i2c_attach_client(new_client)))
lm75_init_client(new_client);
/* Register sysfs hooks */
- data->class_dev = hwmon_device_register(&new_client->dev);
- if (IS_ERR(data->class_dev)) {
- err = PTR_ERR(data->class_dev);
+ if ((err = sysfs_create_group(&new_client->dev.kobj, &lm75_group)))
goto exit_detach;
- }
- device_create_file(&new_client->dev, &dev_attr_temp1_max);
- device_create_file(&new_client->dev, &dev_attr_temp1_max_hyst);
- device_create_file(&new_client->dev, &dev_attr_temp1_input);
+ data->hwmon_dev = hwmon_device_register(&new_client->dev);
+ if (IS_ERR(data->hwmon_dev)) {
+ err = PTR_ERR(data->hwmon_dev);
+ goto exit_remove;
+ }
return 0;
+exit_remove:
+ sysfs_remove_group(&new_client->dev.kobj, &lm75_group);
exit_detach:
i2c_detach_client(new_client);
exit_free:
static int lm75_detach_client(struct i2c_client *client)
{
struct lm75_data *data = i2c_get_clientdata(client);
- hwmon_device_unregister(data->class_dev);
+ hwmon_device_unregister(data->hwmon_dev);
+ sysfs_remove_group(&client->dev.kobj, &lm75_group);
i2c_detach_client(client);
kfree(data);
return 0;
struct i2c_client *client = to_i2c_client(dev);
struct lm75_data *data = i2c_get_clientdata(client);
- down(&data->update_lock);
+ mutex_lock(&data->update_lock);
if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
|| !data->valid) {
+ int i;
dev_dbg(&client->dev, "Starting lm75 update\n");
- data->temp_input = lm75_read_value(client, LM75_REG_TEMP);
- data->temp_max = lm75_read_value(client, LM75_REG_TEMP_OS);
- data->temp_hyst = lm75_read_value(client, LM75_REG_TEMP_HYST);
+ for (i = 0; i < ARRAY_SIZE(data->temp); i++)
+ data->temp[i] = lm75_read_value(client,
+ LM75_REG_TEMP[i]);
data->last_updated = jiffies;
data->valid = 1;
}
- up(&data->update_lock);
+ mutex_unlock(&data->update_lock);
return data;
}
git.samba.org / sfrench / cifs-2.6.git / blobdiff