diff options
Diffstat (limited to 'drivers/hwmon/lm90.c')
| -rw-r--r-- | drivers/hwmon/lm90.c | 52 |
1 files changed, 45 insertions, 7 deletions
diff --git a/drivers/hwmon/lm90.c b/drivers/hwmon/lm90.c index 3edeebc0b835..96a701866726 100644 --- a/drivers/hwmon/lm90.c +++ b/drivers/hwmon/lm90.c @@ -12,9 +12,9 @@ * made by National Semiconductor. Both have an increased remote * temperature measurement accuracy (1 degree), and the LM99 * additionally shifts remote temperatures (measured and limits) by 16 - * degrees, which allows for higher temperatures measurement. The - * driver doesn't handle it since it can be done easily in user-space. + * degrees, which allows for higher temperatures measurement. * Note that there is no way to differentiate between both chips. + * When device is auto-detected, the driver will assume an LM99. * * This driver also supports the LM86, another sensor chip made by * National Semiconductor. It is exactly similar to the LM90 except it @@ -169,8 +169,8 @@ static const struct i2c_device_id lm90_id[] = { { "adt7461", adt7461 }, { "lm90", lm90 }, { "lm86", lm86 }, - { "lm89", lm99 }, - { "lm99", lm99 }, /* Missing temperature offset */ + { "lm89", lm86 }, + { "lm99", lm99 }, { "max6646", max6646 }, { "max6647", max6646 }, { "max6649", max6646 }, @@ -366,6 +366,10 @@ static ssize_t show_temp8(struct device *dev, struct device_attribute *devattr, else temp = temp_from_s8(data->temp8[attr->index]); + /* +16 degrees offset for temp2 for the LM99 */ + if (data->kind == lm99 && attr->index == 3) + temp += 16000; + return sprintf(buf, "%d\n", temp); } @@ -385,6 +389,10 @@ static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr, long val = simple_strtol(buf, NULL, 10); int nr = attr->index; + /* +16 degrees offset for temp2 for the LM99 */ + if (data->kind == lm99 && attr->index == 3) + val -= 16000; + mutex_lock(&data->update_lock); if (data->kind == adt7461) data->temp8[nr] = temp_to_u8_adt7461(data, val); @@ -411,6 +419,10 @@ static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr, else temp = temp_from_s16(data->temp11[attr->index]); + /* +16 degrees offset for temp2 for the LM99 */ + if (data->kind == lm99 && attr->index <= 2) + temp += 16000; + return sprintf(buf, "%d\n", temp); } @@ -432,6 +444,10 @@ static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr, long val = simple_strtol(buf, NULL, 10); int nr = attr->index; + /* +16 degrees offset for temp2 for the LM99 */ + if (data->kind == lm99 && attr->index <= 2) + val -= 16000; + mutex_lock(&data->update_lock); if (data->kind == adt7461) data->temp11[nr] = temp_to_u16_adt7461(data, val); @@ -461,9 +477,15 @@ static ssize_t show_temphyst(struct device *dev, struct device_attribute *devatt if (data->kind == adt7461) temp = temp_from_u8_adt7461(data, data->temp8[attr->index]); + else if (data->kind == max6646) + temp = temp_from_u8(data->temp8[attr->index]); else temp = temp_from_s8(data->temp8[attr->index]); + /* +16 degrees offset for temp2 for the LM99 */ + if (data->kind == lm99 && attr->index == 3) + temp += 16000; + return sprintf(buf, "%d\n", temp - temp_from_s8(data->temp_hyst)); } @@ -473,12 +495,19 @@ static ssize_t set_temphyst(struct device *dev, struct device_attribute *dummy, struct i2c_client *client = to_i2c_client(dev); struct lm90_data *data = i2c_get_clientdata(client); long val = simple_strtol(buf, NULL, 10); - long hyst; + int temp; mutex_lock(&data->update_lock); - hyst = temp_from_s8(data->temp8[2]) - val; + if (data->kind == adt7461) + temp = temp_from_u8_adt7461(data, data->temp8[2]); + else if (data->kind == max6646) + temp = temp_from_u8(data->temp8[2]); + else + temp = temp_from_s8(data->temp8[2]); + + data->temp_hyst = hyst_to_reg(temp - val); i2c_smbus_write_byte_data(client, LM90_REG_W_TCRIT_HYST, - hyst_to_reg(hyst)); + data->temp_hyst); mutex_unlock(&data->update_lock); return count; } @@ -682,6 +711,15 @@ static int lm90_detect(struct i2c_client *new_client, int kind, } else if ((chip_id & 0xF0) == 0x30) { /* LM89/LM99 */ kind = lm99; + dev_info(&adapter->dev, + "Assuming LM99 chip at " + "0x%02x\n", address); + dev_info(&adapter->dev, + "If it is an LM89, pass " + "force_lm86=%d,0x%02x when " + "loading the lm90 driver\n", + i2c_adapter_id(adapter), + address); } else if (address == 0x4C && (chip_id & 0xF0) == 0x10) { /* LM86 */ |