Kernel driver `lm75.o' ===================== Status: Complete and well-tested Supported chips: * National Semiconductor LM75 Prefix: `lm75' Addresses scanned: I2C 0x48 - 0x4f (inclusive) Datasheet: Publicly available at the National Semiconductor website http://www.national.com * National Semiconductor LM77 Prefix: `lm75' Addresses scanned: I2C 0x48 - 0x4b (inclusive) Datasheet: Publicly available at the National Semiconductor website http://www.national.com * Dallas Semiconductor DS75 Prefix: `lm75' Addresses scanned: I2C 0x48 - 0x4f (inclusive) Datasheet: Publicly available at the Dallas Semiconductor website http://www.dalsemi.com * Dallas Semiconductor DS1775 Prefix: `lm75' Addresses scanned: I2C 0x48 - 0x4f (inclusive) Datasheet: Publicly available at the Dallas Semiconductor website http://www.dalsemi.com Author: Frodo Looijaard Module Parameters ----------------- * force: short array (min = 1, max = 48) List of adapter,address pairs to boldly assume to be present * force_lm75: short array (min = 1, max = 48) List of adapter,address pairs which are unquestionably assumed to contain a `lm75' chip * ignore: short array (min = 1, max = 48) List of adapter,address pairs not to scan * ignore_range: short array (min = 1, max = 48) List of adapter,start-addr,end-addr triples not to scan * probe: short array (min = 1, max = 48) List of adapter,address pairs to scan additionally * probe_range: short array (min = 1, max = 48) List of adapter,start-addr,end-addr triples to scan additionally Description ----------- The LM75 implements one temperature sensor. Limits can be set through the Overtemperature Shutdown register and Hysteresis register. Each value can be set and read to half-degree accuracy. An alarm is issued (usually to a connected LM78) when the temperature gets higher then the Overtemperature Shutdown value; it stays on until the temperature falls below the Hysteresis value. All temperatures are in degrees Celcius, and are guaranteed within a range of -55 to +125 degrees. The LM75 only updates its values each 1.5 seconds; reading it more often will do no harm, but will return 'old' values. The LM75 is usually used in combination with LM78-like chips, to measure the temperature of the processor(s). The LM77 is supported as well. It is not distinguished from an LM75 and the two additional registers in the LM77 are not supported. The prefix in the /proc directory is still 'lm75'. The DS75 and DS1775 are supported as well. They are not distinguished from an LM75. While these chips have three additional bits of accuracy (12 vs. 9 for the LM75), the additional bits are not supported. The prefix in the /proc directory is still 'lm75'. Chip Features ------------- Chip `lm75' LABEL LABEL CLASS COMPUTE CLASS ACCESS MAGNITUDE temp NONE NONE R 1 temp_hyst temp temp RW 1 temp_over temp temp RW 1 LABEL FEATURE SYMBOL SYSCTL FILE:OFFSET temp SENSORS_LM75_TEMP temp:3 temp_hyst SENSORS_LM75_TEMP_HYST temp:2 temp_over SENSORS_LM75_TEMP_OVER temp:1