| 1 | Kernel driver `ds1621.o' |
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| 2 | ===================== |
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| 3 | |
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| 4 | Status: Complete and tested, alarms experimental |
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| 5 | |
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| 6 | Supported chips: |
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| 7 | * Dallas Semiconductor DS1621 |
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| 8 | Prefix: `ds1621' |
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| 9 | Addresses scanned: I2C 0x48 - 0x4f (inclusive) |
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| 10 | Datasheet: Publicly available at the Dallas Semiconductor website |
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| 11 | http://www.dalsemi.com |
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| 12 | |
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| 13 | Author: Christian W. Zuckschwerdt <zany@triq.net> |
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| 14 | |
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| 15 | |
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| 16 | Module Parameters |
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| 17 | ----------------- |
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| 18 | |
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| 19 | * force: short array (min = 1, max = 48) |
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| 20 | List of adapter,address pairs to boldly assume to be present |
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| 21 | * force_ds1621: short array (min = 1, max = 48) |
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| 22 | List of adapter,address pairs which are unquestionably assumed to contain |
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| 23 | a `ds1621' chip |
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| 24 | * ignore: short array (min = 1, max = 48) |
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| 25 | List of adapter,address pairs not to scan |
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| 26 | * ignore_range: short array (min = 1, max = 48) |
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| 27 | List of adapter,start-addr,end-addr triples not to scan |
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| 28 | * probe: short array (min = 1, max = 48) |
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| 29 | List of adapter,address pairs to scan additionally |
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| 30 | * probe_range: short array (min = 1, max = 48) |
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| 31 | List of adapter,start-addr,end-addr triples to scan additionally |
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| 32 | |
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| 33 | |
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| 34 | Description |
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| 35 | ----------- |
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| 36 | |
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| 37 | The DS1621 implements one temperature sensor. Limits can be set through the |
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| 38 | Overtemperature register and Hysteresis register. Each value can be |
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| 39 | set and read to half-degree accuracy. |
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| 40 | An alarm is issued when the temperature gets higher then the Overtemperature |
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| 41 | value; or drops below the Hysteresis value. |
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| 42 | |
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| 43 | It stays on until reset by the kernel module. |
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| 44 | |
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| 45 | All temperatures are in degrees Celcius, and are guaranteed within a |
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| 46 | range of -55 to +125 degrees. |
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| 47 | |
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| 48 | The DS1621 supplies the temperature data in a format common with chips |
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| 49 | like the LM75, LM77 and DS75, DS1775. |
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| 50 | While the DS1621 has three additional bits of accuracy |
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| 51 | (12 vs. 9 for the LM75), the additional bits are not supported. |
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| 52 | |
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| 53 | |
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| 54 | Chip Features |
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| 55 | ------------- |
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| 56 | |
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| 57 | Chip `ds1621' |
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| 58 | LABEL LABEL CLASS COMPUTE CLASS ACCESS MAGNITUDE |
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| 59 | temp NONE NONE R 1 |
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| 60 | temp_hyst temp temp RW 1 |
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| 61 | temp_over temp temp RW 1 |
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| 62 | alarms NONE NONE R 0 |
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| 63 | |
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| 64 | LABEL FEATURE SYMBOL SYSCTL FILE:OFFSET |
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| 65 | temp SENSORS_DS1621_TEMP temp:3 |
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| 66 | temp_hyst SENSORS_DS1621_TEMP_HYST temp:2 |
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| 67 | temp_over SENSORS_DS1621_TEMP_OVER temp:1 |
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| 68 | alarms SENSORS_DS1621_ALARMS alarms:1 |
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