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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>
This commit is contained in:
Jean Delvare 2007-06-09 10:11:15 -04:00 committed by Mark M. Hoffman
parent e4a7167f82
commit 75819f01af
1 changed files with 19 additions and 32 deletions
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51
drivers/hwmon/ds1621.c
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@ -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: