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hwmon: (tmp401/tmp421) Clean up detect functions 

As kind is now hard-coded to -1, there is room for code clean-ups.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Andre Prendel <andre.prendel@gmx.de>
This commit is contained in:
Jean Delvare 2009-12-09 20:35:54 +01:00
parent 8f2fa77c53
commit dbe73c8f45
2 changed files with 46 additions and 52 deletions
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55
drivers/hwmon/tmp401.c
View File

@ -488,46 +488,43 @@ static void tmp401_init_client(struct i2c_client *client)
i2c_smbus_write_byte_data(client, TMP401_CONFIG_WRITE, config);
}
static int tmp401_detect(struct i2c_client *client, int kind,
static int tmp401_detect(struct i2c_client *client, int _kind,
struct i2c_board_info *info)
{
enum chips kind;
struct i2c_adapter *adapter = client->adapter;
u8 reg;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return -ENODEV;
/* Detect and identify the chip */
if (kind <= 0) {
u8 reg;
reg = i2c_smbus_read_byte_data(client, TMP401_MANUFACTURER_ID_REG);
if (reg != TMP401_MANUFACTURER_ID)
return -ENODEV;
reg = i2c_smbus_read_byte_data(client,
TMP401_MANUFACTURER_ID_REG);
if (reg != TMP401_MANUFACTURER_ID)
return -ENODEV;
reg = i2c_smbus_read_byte_data(client, TMP401_DEVICE_ID_REG);
reg = i2c_smbus_read_byte_data(client, TMP401_DEVICE_ID_REG);
switch (reg) {
case TMP401_DEVICE_ID:
kind = tmp401;
break;
case TMP411_DEVICE_ID:
kind = tmp411;
break;
default:
return -ENODEV;
}
reg = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ);
if (reg & 0x1b)
return -ENODEV;
reg = i2c_smbus_read_byte_data(client,
TMP401_CONVERSION_RATE_READ);
/* Datasheet says: 0x1-0x6 */
if (reg > 15)
return -ENODEV;
switch (reg) {
case TMP401_DEVICE_ID:
kind = tmp401;
break;
case TMP411_DEVICE_ID:
kind = tmp411;
break;
default:
return -ENODEV;
}
reg = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ);
if (reg & 0x1b)
return -ENODEV;
reg = i2c_smbus_read_byte_data(client, TMP401_CONVERSION_RATE_READ);
/* Datasheet says: 0x1-0x6 */
if (reg > 15)
return -ENODEV;
strlcpy(info->type, tmp401_id[kind - 1].name, I2C_NAME_SIZE);
return 0;

43
drivers/hwmon/tmp421.c
View File

@ -223,39 +223,36 @@ static int tmp421_init_client(struct i2c_client *client)
return 0;
}
static int tmp421_detect(struct i2c_client *client, int kind,
static int tmp421_detect(struct i2c_client *client, int _kind,
struct i2c_board_info *info)
{
enum chips kind;
struct i2c_adapter *adapter = client->adapter;
const char *names[] = { "TMP421", "TMP422", "TMP423" };
u8 reg;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return -ENODEV;
if (kind <= 0) {
u8 reg;
reg = i2c_smbus_read_byte_data(client, TMP421_MANUFACTURER_ID_REG);
if (reg != TMP421_MANUFACTURER_ID)
return -ENODEV;
reg = i2c_smbus_read_byte_data(client,
TMP421_MANUFACTURER_ID_REG);
if (reg != TMP421_MANUFACTURER_ID)
return -ENODEV;
reg = i2c_smbus_read_byte_data(client,
TMP421_DEVICE_ID_REG);
switch (reg) {
case TMP421_DEVICE_ID:
kind = tmp421;
break;
case TMP422_DEVICE_ID:
kind = tmp422;
break;
case TMP423_DEVICE_ID:
kind = tmp423;
break;
default:
return -ENODEV;
}
reg = i2c_smbus_read_byte_data(client, TMP421_DEVICE_ID_REG);
switch (reg) {
case TMP421_DEVICE_ID:
kind = tmp421;
break;
case TMP422_DEVICE_ID:
kind = tmp422;
break;
case TMP423_DEVICE_ID:
kind = tmp423;
break;
default:
return -ENODEV;
}
strlcpy(info->type, tmp421_id[kind - 1].name, I2C_NAME_SIZE);
dev_info(&adapter->dev, "Detected TI %s chip at 0x%02x\n",
names[kind - 1], client->addr);