hwmon/ds1621: Minor cleanups

* Discard comments which do not apply or are redundant.
* Remove a few useless instructions.
* Rename new_client to just client.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Aurelien Jarno <aurelien@aurel32.net>

1 files changed, 19 insertions, 32 deletions

diff --git a/drivers/hwmon/ds1621.c b/drivers/hwmon/ds1621.c
index d5ac422d73b2..ccf0fe617e5f 100644
--- a/drivers/hwmon/ds1621.c
+++ b/drivers/hwmon/ds1621.c
@@ -63,10 +63,7 @@ MODULE_PARM_DESC(polarity, "Output's polarity: 0 = active high, 1 = active low")
 #define DS1621_ALARM_TEMP_HIGH          0x40
 #define DS1621_ALARM_TEMP_LOW           0x20
 
-/* Conversions. Rounding and limit checking is only done on the TO_REG
-   variants. Note that you should be a bit careful with which arguments
-   these macros are called: arguments may be evaluated more than once.
-   Fixing this is just not worth it. */
+/* Conversions */
 #define ALARMS_FROM_REG(val) ((val) & \
                               (DS1621_ALARM_TEMP_HIGH | DS1621_ALARM_TEMP_LOW))
 
@@ -101,7 +98,7 @@ static struct i2c_driver ds1621_driver = {
 
 /* All registers are word-sized, except for the configuration register.
    DS1621 uses a high-byte first convention, which is exactly opposite to
-   the usual practice. */
+   the SMBus standard. */
 static int ds1621_read_value(struct i2c_client *client, u8 reg)
 {
         if (reg == DS1621_REG_CONF)
@@ -110,9 +107,6 @@ static int ds1621_read_value(struct i2c_client *client, u8 reg)
                 return swab16(i2c_smbus_read_word_data(client, reg));
 }
 
-/* All registers are word-sized, except for the configuration register.
-   DS1621 uses a high-byte first convention, which is exactly opposite to
-   the usual practice. */
 static int ds1621_write_value(struct i2c_client *client, u8 reg, u16 value)
 {
         if (reg == DS1621_REG_CONF)
@@ -204,7 +198,7 @@ static int ds1621_detect(struct i2c_adapter *adapter, int address,
                          int kind)
 {
         int conf, temp;
-        struct i2c_client *new_client;
+        struct i2c_client *client;
         struct ds1621_data *data;
         int err = 0;
 
@@ -221,55 +215,48 @@ static int ds1621_detect(struct i2c_adapter *adapter, int address,
                 goto exit;
         }
         
-        new_client = &data->client;
-        i2c_set_clientdata(new_client, data);
-        new_client->addr = address;
-        new_client->adapter = adapter;
-        new_client->driver = &ds1621_driver;
-        new_client->flags = 0;
-
+        client = &data->client;
+        i2c_set_clientdata(client, data);
+        client->addr = address;
+        client->adapter = adapter;
+        client->driver = &ds1621_driver;
 
         /* Now, we do the remaining detection. It is lousy. */
         if (kind < 0) {
                 /* The NVB bit should be low if no EEPROM write has been 
                    requested during the latest 10ms, which is highly 
                    improbable in our case. */
-                conf = ds1621_read_value(new_client, DS1621_REG_CONF);
+                conf = ds1621_read_value(client, DS1621_REG_CONF);
                 if (conf & DS1621_REG_CONFIG_NVB)
                         goto exit_free;
                 /* The 7 lowest bits of a temperature should always be 0. */
-                temp = ds1621_read_value(new_client, DS1621_REG_TEMP);
+                temp = ds1621_read_value(client, DS1621_REG_TEMP);
                 if (temp & 0x007f)
                         goto exit_free;
-                temp = ds1621_read_value(new_client, DS1621_REG_TEMP_MIN);
+                temp = ds1621_read_value(client, DS1621_REG_TEMP_MIN);
                 if (temp & 0x007f)
                         goto exit_free;
-                temp = ds1621_read_value(new_client, DS1621_REG_TEMP_MAX);
+                temp = ds1621_read_value(client, DS1621_REG_TEMP_MAX);
                 if (temp & 0x007f)
                         goto exit_free;
         }
 
-        /* Determine the chip type - only one kind supported! */
-        if (kind <= 0)
-                kind = ds1621;
-
         /* Fill in remaining client fields and put it into the global list */
-        strlcpy(new_client->name, "ds1621", I2C_NAME_SIZE);
-        data->valid = 0;
+        strlcpy(client->name, "ds1621", I2C_NAME_SIZE);
         mutex_init(&data->update_lock);
 
         /* Tell the I2C layer a new client has arrived */
-        if ((err = i2c_attach_client(new_client)))
+        if ((err = i2c_attach_client(client)))
                 goto exit_free;
 
         /* Initialize the DS1621 chip */
-        ds1621_init_client(new_client);
+        ds1621_init_client(client);
 
         /* Register sysfs hooks */
-        if ((err = sysfs_create_group(&new_client->dev.kobj, &ds1621_group)))
+        if ((err = sysfs_create_group(&client->dev.kobj, &ds1621_group)))
                 goto exit_detach;
 
-        data->class_dev = hwmon_device_register(&new_client->dev);
+        data->class_dev = hwmon_device_register(&client->dev);
         if (IS_ERR(data->class_dev)) {
                 err = PTR_ERR(data->class_dev);
                 goto exit_remove_files;
@@ -278,9 +265,9 @@ static int ds1621_detect(struct i2c_adapter *adapter, int address,
         return 0;
 
       exit_remove_files:
-        sysfs_remove_group(&new_client->dev.kobj, &ds1621_group);
+        sysfs_remove_group(&client->dev.kobj, &ds1621_group);
       exit_detach:
-        i2c_detach_client(new_client);
+        i2c_detach_client(client);
       exit_free:
         kfree(data);
       exit: