diff options
author | Alexander Stein <alexander.stein@systec-electronic.com> | 2011-06-28 15:11:23 +0000 |
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committer | Guenter Roeck <guenter.roeck@ericsson.com> | 2011-07-28 00:17:35 -0700 |
commit | fffd80ccc1e6c7e5f13741e17a7d80582ae21fcc (patch) | |
tree | 6c3b9d74a4f1cc21a2f60ac022e115c833b8ba78 /Documentation | |
parent | 2ef017935d698b1c7c7421a7ebe20579d8f904dd (diff) |
hwmon: LM95245 driver
A hwmon driver for the National Semiconductor LM95245 dual temperature
sensors chip.
Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Diffstat (limited to 'Documentation')
-rw-r--r-- | Documentation/hwmon/lm95245 | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/Documentation/hwmon/lm95245 b/Documentation/hwmon/lm95245 new file mode 100644 index 000000000000..cbd8aeab7124 --- /dev/null +++ b/Documentation/hwmon/lm95245 @@ -0,0 +1,33 @@ +Kernel driver lm95245 +================== + +Supported chips: + * National Semiconductor LM95245 + Addresses scanned: I2C 0x18, 0x19, 0x29, 0x4c, 0x4d + Datasheet: Publicly available at the National Semiconductor website + http://www.national.com/mpf/LM/LM95245.html + + +Author: Alexander Stein <alexander.stein@systec-electronic.com> + +Description +----------- + +The LM95245 is an 11-bit digital temperature sensor with a 2-wire System +Management Bus (SMBus) interface and TruTherm technology that can monitor +the temperature of a remote diode as well as its own temperature. +The LM95245 can be used to very accurately monitor the temperature of +external devices such as microprocessors. + +All temperature values are given in millidegrees Celsius. Local temperature +is given within a range of -127 to +127.875 degrees. Remote temperatures are +given within a range of -127 to +255 degrees. Resolution depends on +temperature input and range. + +Each sensor has its own critical limit, but the hysteresis is common to all +two channels. + +The lm95245 driver can change its update interval to a fixed set of values. +It will round up to the next selectable interval. See the datasheet for exact +values. Reading sensor values more often will do no harm, but will return +'old' values. |