#include <linux/i2c.h>
#include <linux/hwmon.h>
#include <linux/err.h>
+#include <linux/mutex.h>
/* Addresses to scan */
static unsigned short normal_i2c[] = { 0x48, 0x49, 0x4a, 0x4b, I2C_CLIENT_END };
struct lm77_data {
struct i2c_client client;
struct class_device *class_dev;
- struct semaphore update_lock;
+ struct mutex update_lock;
char valid;
unsigned long last_updated; /* In jiffies */
int temp_input; /* Temperatures */
/* This is the driver that will be inserted */
static struct i2c_driver lm77_driver = {
- .owner = THIS_MODULE,
- .name = "lm77",
+ .driver = {
+ .name = "lm77",
+ },
.attach_adapter = lm77_attach_adapter,
.detach_client = lm77_detach_client,
};
/* In the temperature registers, the low 3 bits are not part of the
temperature values; they are the status bits. */
-static inline u16 LM77_TEMP_TO_REG(int temp)
+static inline s16 LM77_TEMP_TO_REG(int temp)
{
int ntemp = SENSORS_LIMIT(temp, LM77_TEMP_MIN, LM77_TEMP_MAX);
- return (u16)((ntemp / 500) * 8);
+ return (ntemp / 500) * 8;
}
-static inline int LM77_TEMP_FROM_REG(u16 reg)
+static inline int LM77_TEMP_FROM_REG(s16 reg)
{
- return ((int)reg / 8) * 500;
+ return (reg / 8) * 500;
}
/* sysfs stuff */
struct lm77_data *data = i2c_get_clientdata(client); \
long val = simple_strtoul(buf, NULL, 10); \
\
- down(&data->update_lock); \
+ mutex_lock(&data->update_lock); \
data->value = val; \
lm77_write_value(client, reg, LM77_TEMP_TO_REG(data->value)); \
- up(&data->update_lock); \
+ mutex_unlock(&data->update_lock); \
return count; \
}
struct lm77_data *data = i2c_get_clientdata(client);
unsigned long val = simple_strtoul(buf, NULL, 10);
- down(&data->update_lock);
+ mutex_lock(&data->update_lock);
data->temp_hyst = data->temp_crit - val;
lm77_write_value(client, LM77_REG_TEMP_HYST,
LM77_TEMP_TO_REG(data->temp_hyst));
- up(&data->update_lock);
+ mutex_unlock(&data->update_lock);
return count;
}
long val = simple_strtoul(buf, NULL, 10);
int oldcrithyst;
- down(&data->update_lock);
+ mutex_lock(&data->update_lock);
oldcrithyst = data->temp_crit - data->temp_hyst;
data->temp_crit = val;
data->temp_hyst = data->temp_crit - oldcrithyst;
LM77_TEMP_TO_REG(data->temp_crit));
lm77_write_value(client, LM77_REG_TEMP_HYST,
LM77_TEMP_TO_REG(data->temp_hyst));
- up(&data->update_lock);
+ mutex_unlock(&data->update_lock);
return count;
}
/* 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)))
struct i2c_client *client = to_i2c_client(dev);
struct lm77_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) {
data->valid = 1;
}
- up(&data->update_lock);
+ mutex_unlock(&data->update_lock);
return data;
}