#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>
/* How many retries on register read error */
#define MAX_RETRIES 5
* The W83L785TS-S uses signed 8-bit values.
*/
-#define TEMP_FROM_REG(val) ((val & 0x80 ? val-0x100 : val) * 1000)
+#define TEMP_FROM_REG(val) ((val) * 1000)
/*
* Functions declaration
*/
static struct i2c_driver w83l785ts_driver = {
- .owner = THIS_MODULE,
- .name = "w83l785ts",
+ .driver = {
+ .name = "w83l785ts",
+ },
.id = I2C_DRIVERID_W83L785TS,
- .flags = I2C_DF_NOTIFY,
.attach_adapter = w83l785ts_attach_adapter,
.detach_client = w83l785ts_detach_client,
};
struct w83l785ts_data {
struct i2c_client client;
- struct class_device *class_dev;
- struct semaphore update_lock;
+ struct device *hwmon_dev;
+ struct mutex update_lock;
char valid; /* zero until following fields are valid */
unsigned long last_updated; /* in jiffies */
/* registers values */
- u8 temp, temp_over;
+ s8 temp[2]; /* 0: input
+ 1: critical limit */
};
/*
* Sysfs stuff
*/
-static ssize_t show_temp(struct device *dev, struct device_attribute *attr, char *buf)
+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 w83l785ts_data *data = w83l785ts_update_device(dev);
- return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp));
+ return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[attr->index]));
}
-static ssize_t show_temp_over(struct device *dev, struct device_attribute *attr, char *buf)
-{
- struct w83l785ts_data *data = w83l785ts_update_device(dev);
- return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_over));
-}
-
-static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL);
-static DEVICE_ATTR(temp1_max, S_IRUGO, show_temp_over, NULL);
+static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
+static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, show_temp, NULL, 1);
/*
* Real code
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
goto exit;
- if (!(data = kmalloc(sizeof(struct w83l785ts_data), GFP_KERNEL))) {
+ if (!(data = kzalloc(sizeof(struct w83l785ts_data), GFP_KERNEL))) {
err = -ENOMEM;
goto exit;
}
- memset(data, 0, sizeof(struct w83l785ts_data));
-
/* The common I2C client data is placed right before the
* W83L785TS-specific data. */
/* We can fill in the remaining client fields. */
strlcpy(new_client->name, "w83l785ts", I2C_NAME_SIZE);
data->valid = 0;
- init_MUTEX(&data->update_lock);
+ mutex_init(&data->update_lock);
/* Default values in case the first read fails (unlikely). */
- data->temp_over = data->temp = 0;
+ data->temp[1] = data->temp[0] = 0;
/* Tell the I2C layer a new client has arrived. */
if ((err = i2c_attach_client(new_client)))
* Nothing yet, assume it is already started.
*/
+ err = device_create_file(&new_client->dev,
+ &sensor_dev_attr_temp1_input.dev_attr);
+ if (err)
+ goto exit_remove;
+
+ err = device_create_file(&new_client->dev,
+ &sensor_dev_attr_temp1_max.dev_attr);
+ if (err)
+ goto exit_remove;
+
/* Register sysfs hooks */
- data->class_dev = hwmon_device_register(&new_client->dev);
- if (IS_ERR(data->class_dev)) {
- err = PTR_ERR(data->class_dev);
- goto exit_detach;
+ data->hwmon_dev = hwmon_device_register(&new_client->dev);
+ if (IS_ERR(data->hwmon_dev)) {
+ err = PTR_ERR(data->hwmon_dev);
+ goto exit_remove;
}
- device_create_file(&new_client->dev, &dev_attr_temp1_input);
- device_create_file(&new_client->dev, &dev_attr_temp1_max);
-
return 0;
-exit_detach:
+exit_remove:
+ device_remove_file(&new_client->dev,
+ &sensor_dev_attr_temp1_input.dev_attr);
+ device_remove_file(&new_client->dev,
+ &sensor_dev_attr_temp1_max.dev_attr);
i2c_detach_client(new_client);
exit_free:
kfree(data);
struct w83l785ts_data *data = i2c_get_clientdata(client);
int err;
- hwmon_device_unregister(data->class_dev);
-
+ hwmon_device_unregister(data->hwmon_dev);
+ device_remove_file(&client->dev,
+ &sensor_dev_attr_temp1_input.dev_attr);
+ device_remove_file(&client->dev,
+ &sensor_dev_attr_temp1_max.dev_attr);
if ((err = i2c_detach_client(client)))
return err;
struct i2c_client *client = to_i2c_client(dev);
struct w83l785ts_data *data = i2c_get_clientdata(client);
- down(&data->update_lock);
+ mutex_lock(&data->update_lock);
if (!data->valid || time_after(jiffies, data->last_updated + HZ * 2)) {
dev_dbg(&client->dev, "Updating w83l785ts data.\n");
- data->temp = w83l785ts_read_value(client,
- W83L785TS_REG_TEMP, data->temp);
- data->temp_over = w83l785ts_read_value(client,
- W83L785TS_REG_TEMP_OVER, data->temp_over);
+ data->temp[0] = w83l785ts_read_value(client,
+ W83L785TS_REG_TEMP, data->temp[0]);
+ data->temp[1] = w83l785ts_read_value(client,
+ W83L785TS_REG_TEMP_OVER, data->temp[1]);
data->last_updated = jiffies;
data->valid = 1;
}
- up(&data->update_lock);
+ mutex_unlock(&data->update_lock);
return data;
}