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path: root/drivers/hwmon/max1619.c
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Diffstat (limited to 'drivers/hwmon/max1619.c')
-rw-r--r--drivers/hwmon/max1619.c13
1 files changed, 7 insertions, 6 deletions
diff --git a/drivers/hwmon/max1619.c b/drivers/hwmon/max1619.c
index 3abe330b22c..b4135b5971f 100644
--- a/drivers/hwmon/max1619.c
+++ b/drivers/hwmon/max1619.c
@@ -33,6 +33,7 @@
#include <linux/i2c.h>
#include <linux/hwmon.h>
#include <linux/err.h>
+#include <linux/mutex.h>
static unsigned short normal_i2c[] = { 0x18, 0x19, 0x1a,
0x29, 0x2a, 0x2b,
@@ -104,7 +105,7 @@ static struct i2c_driver max1619_driver = {
struct max1619_data {
struct i2c_client client;
struct class_device *class_dev;
- struct semaphore update_lock;
+ struct mutex update_lock;
char valid; /* zero until following fields are valid */
unsigned long last_updated; /* in jiffies */
@@ -141,10 +142,10 @@ static ssize_t set_##value(struct device *dev, struct device_attribute *attr, co
struct max1619_data *data = i2c_get_clientdata(client); \
long val = simple_strtol(buf, NULL, 10); \
\
- down(&data->update_lock); \
+ mutex_lock(&data->update_lock); \
data->value = TEMP_TO_REG(val); \
i2c_smbus_write_byte_data(client, reg, data->value); \
- up(&data->update_lock); \
+ mutex_unlock(&data->update_lock); \
return count; \
}
@@ -262,7 +263,7 @@ static int max1619_detect(struct i2c_adapter *adapter, int address, int kind)
/* We can fill in the remaining client fields */
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)))
@@ -330,7 +331,7 @@ static struct max1619_data *max1619_update_device(struct device *dev)
struct i2c_client *client = to_i2c_client(dev);
struct max1619_data *data = i2c_get_clientdata(client);
- down(&data->update_lock);
+ mutex_lock(&data->update_lock);
if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) {
dev_dbg(&client->dev, "Updating max1619 data.\n");
@@ -353,7 +354,7 @@ static struct max1619_data *max1619_update_device(struct device *dev)
data->valid = 1;
}
- up(&data->update_lock);
+ mutex_unlock(&data->update_lock);
return data;
}