diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/hwmon/lm85.c | 123 |
1 files changed, 50 insertions, 73 deletions
diff --git a/drivers/hwmon/lm85.c b/drivers/hwmon/lm85.c index 12d446f54f9..3594a02f281 100644 --- a/drivers/hwmon/lm85.c +++ b/drivers/hwmon/lm85.c @@ -1106,7 +1106,6 @@ static void lm85_init_client(struct i2c_client *client) static int lm85_detect(struct i2c_adapter *adapter, int address, int kind) { - int company, verstep; struct i2c_client *client; struct lm85_data *data; int err = 0; @@ -1117,10 +1116,6 @@ static int lm85_detect(struct i2c_adapter *adapter, int address, goto ERROR0; } - /* OK. For now, we presume we have a valid client. We now create the - client structure, even though we cannot fill it completely yet. - But it allows us to access lm85_{read,write}_value. */ - if (!(data = kzalloc(sizeof(struct lm85_data), GFP_KERNEL))) { err = -ENOMEM; goto ERROR0; @@ -1132,75 +1127,57 @@ static int lm85_detect(struct i2c_adapter *adapter, int address, client->adapter = adapter; client->driver = &lm85_driver; - /* Now, we do the remaining detection. */ - - company = lm85_read_value(client, LM85_REG_COMPANY); - verstep = lm85_read_value(client, LM85_REG_VERSTEP); - - dev_dbg(&adapter->dev, "Detecting device at %d,0x%02x with" - " COMPANY: 0x%02x and VERSTEP: 0x%02x\n", - i2c_adapter_id(client->adapter), client->addr, - company, verstep); - - /* If auto-detecting, Determine the chip type. */ - if (kind <= 0) { - dev_dbg(&adapter->dev, "Autodetecting device at %d,0x%02x ...\n", - i2c_adapter_id(adapter), address); - if (company == LM85_COMPANY_NATIONAL - && verstep == LM85_VERSTEP_LM85C) { - kind = lm85c; - } else if (company == LM85_COMPANY_NATIONAL - && verstep == LM85_VERSTEP_LM85B) { - kind = lm85b; - } else if (company == LM85_COMPANY_NATIONAL - && (verstep & LM85_VERSTEP_VMASK) == LM85_VERSTEP_GENERIC) { - dev_err(&adapter->dev, "Unrecognized version/stepping 0x%02x" - " Defaulting to LM85.\n", verstep); - kind = any_chip; - } else if (company == LM85_COMPANY_ANALOG_DEV - && verstep == LM85_VERSTEP_ADM1027) { - kind = adm1027; - } else if (company == LM85_COMPANY_ANALOG_DEV - && (verstep == LM85_VERSTEP_ADT7463 - || verstep == LM85_VERSTEP_ADT7463C)) { - kind = adt7463; - } else if (company == LM85_COMPANY_ANALOG_DEV - && (verstep & LM85_VERSTEP_VMASK) == LM85_VERSTEP_GENERIC) { - dev_err(&adapter->dev, "Unrecognized version/stepping 0x%02x" - " Defaulting to Generic LM85.\n", verstep); - kind = any_chip; - } else if (company == LM85_COMPANY_SMSC - && (verstep == LM85_VERSTEP_EMC6D100_A0 - || verstep == LM85_VERSTEP_EMC6D100_A1)) { - /* Unfortunately, we can't tell a '100 from a '101 - * from the registers. Since a '101 is a '100 - * in a package with fewer pins and therefore no - * 3.3V, 1.5V or 1.8V inputs, perhaps if those - * inputs read 0, then it's a '101. - */ - kind = emc6d100; - } else if (company == LM85_COMPANY_SMSC - && verstep == LM85_VERSTEP_EMC6D102) { - kind = emc6d102; - } else if (company == LM85_COMPANY_SMSC - && (verstep & LM85_VERSTEP_VMASK) == LM85_VERSTEP_GENERIC) { - dev_err(&adapter->dev, "lm85: Detected SMSC chip\n"); - dev_err(&adapter->dev, "lm85: Unrecognized version/stepping 0x%02x" - " Defaulting to Generic LM85.\n", verstep); - kind = any_chip; - } else if (kind == any_chip - && (verstep & LM85_VERSTEP_VMASK) == LM85_VERSTEP_GENERIC) { - dev_err(&adapter->dev, "Generic LM85 Version 6 detected\n"); - /* Leave kind as "any_chip" */ - } else { - dev_dbg(&adapter->dev, "Autodetection failed\n"); - /* Not an LM85... */ - if (kind == any_chip) { /* User used force=x,y */ - dev_err(&adapter->dev, "Generic LM85 Version 6 not" - " found at %d,0x%02x. Try force_lm85c.\n", - i2c_adapter_id(adapter), address); + /* If auto-detecting, determine the chip type */ + if (kind < 0) { + int company = lm85_read_value(client, LM85_REG_COMPANY); + int verstep = lm85_read_value(client, LM85_REG_VERSTEP); + + dev_dbg(&adapter->dev, "Detecting device at 0x%02x with " + "COMPANY: 0x%02x and VERSTEP: 0x%02x\n", + address, company, verstep); + + /* All supported chips have the version in common */ + if ((verstep & LM85_VERSTEP_VMASK) != LM85_VERSTEP_GENERIC) { + dev_dbg(&adapter->dev, "Autodetection failed: " + "unsupported version\n"); + goto ERROR1; + } + kind = any_chip; + + /* Now, refine the detection */ + if (company == LM85_COMPANY_NATIONAL) { + switch (verstep) { + case LM85_VERSTEP_LM85C: + kind = lm85c; + break; + case LM85_VERSTEP_LM85B: + kind = lm85b; + break; + } + } else if (company == LM85_COMPANY_ANALOG_DEV) { + switch (verstep) { + case LM85_VERSTEP_ADM1027: + kind = adm1027; + break; + case LM85_VERSTEP_ADT7463: + case LM85_VERSTEP_ADT7463C: + kind = adt7463; + break; } - err = 0; + } else if (company == LM85_COMPANY_SMSC) { + switch (verstep) { + case LM85_VERSTEP_EMC6D100_A0: + case LM85_VERSTEP_EMC6D100_A1: + /* Note: we can't tell a '100 from a '101 */ + kind = emc6d100; + break; + case LM85_VERSTEP_EMC6D102: + kind = emc6d102; + break; + } + } else { + dev_dbg(&adapter->dev, "Autodetection failed: " + "unknown vendor\n"); goto ERROR1; } } |