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| author | Jean Delvare <khali@linux-fr.org> | 2009-12-09 20:35:57 +0100 |
|---|---|---|
| committer | Jean Delvare <khali@linux-fr.org> | 2009-12-09 20:35:57 +0100 |
| commit | 52df6440a29123eed912183fe785bbe174ef14b9 (patch) | |
| tree | 3a3b9f4110d21c2ec4f5711444dd9cec6fb3d32c /drivers/hwmon/lm63.c | |
| parent | a1fa4cdcc4abd4c02a81ab7052c16a342d29f060 (diff) | |
| download | lwn-52df6440a29123eed912183fe785bbe174ef14b9.tar.gz lwn-52df6440a29123eed912183fe785bbe174ef14b9.zip | |
hwmon: 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: Corentin Labbe <corentin.labbe@geomatys.fr>
Cc: "Mark M. Hoffman" <mhoffman@lightlink.com>
Cc: Juerg Haefliger <juergh@gmail.com>
Cc: Riku Voipio <riku.voipio@iki.fi>
Acked-by: "Hans J. Koch" <hjk@linutronix.de>
Cc: Rudolf Marek <r.marek@assembler.cz>
Diffstat (limited to 'drivers/hwmon/lm63.c')
| -rw-r--r-- | drivers/hwmon/lm63.c | 54 |
1 files changed, 24 insertions, 30 deletions
diff --git a/drivers/hwmon/lm63.c b/drivers/hwmon/lm63.c index 3195a265f0e9..5da66ab04f74 100644 --- a/drivers/hwmon/lm63.c +++ b/drivers/hwmon/lm63.c @@ -427,40 +427,34 @@ static int lm63_detect(struct i2c_client *new_client, int kind, struct i2c_board_info *info) { struct i2c_adapter *adapter = new_client->adapter; + u8 man_id, chip_id, reg_config1, reg_config2; + u8 reg_alert_status, reg_alert_mask; if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) return -ENODEV; - if (kind < 0) { /* must identify */ - u8 man_id, chip_id, reg_config1, reg_config2; - u8 reg_alert_status, reg_alert_mask; - - man_id = i2c_smbus_read_byte_data(new_client, - LM63_REG_MAN_ID); - chip_id = i2c_smbus_read_byte_data(new_client, - LM63_REG_CHIP_ID); - reg_config1 = i2c_smbus_read_byte_data(new_client, - LM63_REG_CONFIG1); - reg_config2 = i2c_smbus_read_byte_data(new_client, - LM63_REG_CONFIG2); - reg_alert_status = i2c_smbus_read_byte_data(new_client, - LM63_REG_ALERT_STATUS); - reg_alert_mask = i2c_smbus_read_byte_data(new_client, - LM63_REG_ALERT_MASK); - - if (man_id == 0x01 /* National Semiconductor */ - && chip_id == 0x41 /* LM63 */ - && (reg_config1 & 0x18) == 0x00 - && (reg_config2 & 0xF8) == 0x00 - && (reg_alert_status & 0x20) == 0x00 - && (reg_alert_mask & 0xA4) == 0xA4) { - kind = lm63; - } else { /* failed */ - dev_dbg(&adapter->dev, "Unsupported chip " - "(man_id=0x%02X, chip_id=0x%02X).\n", - man_id, chip_id); - return -ENODEV; - } + man_id = i2c_smbus_read_byte_data(new_client, LM63_REG_MAN_ID); + chip_id = i2c_smbus_read_byte_data(new_client, LM63_REG_CHIP_ID); + + reg_config1 = i2c_smbus_read_byte_data(new_client, + LM63_REG_CONFIG1); + reg_config2 = i2c_smbus_read_byte_data(new_client, + LM63_REG_CONFIG2); + reg_alert_status = i2c_smbus_read_byte_data(new_client, + LM63_REG_ALERT_STATUS); + reg_alert_mask = i2c_smbus_read_byte_data(new_client, + LM63_REG_ALERT_MASK); + + if (man_id != 0x01 /* National Semiconductor */ + || chip_id != 0x41 /* LM63 */ + || (reg_config1 & 0x18) != 0x00 + || (reg_config2 & 0xF8) != 0x00 + || (reg_alert_status & 0x20) != 0x00 + || (reg_alert_mask & 0xA4) != 0xA4) { + dev_dbg(&adapter->dev, + "Unsupported chip (man_id=0x%02X, chip_id=0x%02X)\n", + man_id, chip_id); + return -ENODEV; } strlcpy(info->type, "lm63", I2C_NAME_SIZE); |