diff options
Diffstat (limited to 'Documentation/hwmon/lm75')
| -rw-r--r-- | Documentation/hwmon/lm75 | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/Documentation/hwmon/lm75 b/Documentation/hwmon/lm75 index c91a1d15fa28..2560a9c6d445 100644 --- a/Documentation/hwmon/lm75 +++ b/Documentation/hwmon/lm75 @@ -12,18 +12,18 @@ Supported chips: Addresses scanned: I2C 0x48 - 0x4f Datasheet: Publicly available at the National Semiconductor website http://www.national.com/ - * Dallas Semiconductor DS75, DS1775 - Prefixes: 'ds75', 'ds1775' + * Dallas Semiconductor (now Maxim) DS75, DS1775, DS7505 + Prefixes: 'ds75', 'ds1775', 'ds7505' Addresses scanned: none - Datasheet: Publicly available at the Dallas Semiconductor website - http://www.maxim-ic.com/ + Datasheet: Publicly available at the Maxim website + http://www.maximintegrated.com/ * Maxim MAX6625, MAX6626 Prefixes: 'max6625', 'max6626' Addresses scanned: none Datasheet: Publicly available at the Maxim website http://www.maxim-ic.com/ * Microchip (TelCom) TCN75 - Prefix: 'lm75' + Prefix: 'tcn75' Addresses scanned: none Datasheet: Publicly available at the Microchip website http://www.microchip.com/ @@ -67,7 +67,8 @@ the temperature falls below the Hysteresis value. All temperatures are in degrees Celsius, 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 +The driver caches the values for a period varying between 1 second for the +slowest chips and 125 ms for the fastest chips; reading it more often will do no harm, but will return 'old' values. The original LM75 was typically used in combination with LM78-like chips @@ -78,8 +79,8 @@ The LM75 is essentially an industry standard; there may be other LM75 clones not listed here, with or without various enhancements, that are supported. The clones are not detected by the driver, unless they reproduce the exact register tricks of the original LM75, and must -therefore be instantiated explicitly. The specific enhancements (such as -higher resolution) are not currently supported by the driver. +therefore be instantiated explicitly. Higher resolution up to 12-bit +is supported by this driver, other specific enhancements are not. The LM77 is not supported, contrary to what we pretended for a long time. Both chips are simply not compatible, value encoding differs. |