1 Kernel driver lm95245 2 ===================== 3 4 Supported chips: 5 6 * TI LM95235 7 8 Addresses scanned: I2C 0x18, 0x29, 0x4c 9 10 Datasheet: Publicly available at the TI website 11 12 https://www.ti.com/lit/ds/symlink/lm95235.pdf 13 14 * TI / National Semiconductor LM95245 15 16 Addresses scanned: I2C 0x18, 0x19, 0x29, 0x4c, 0x4d 17 18 Datasheet: Publicly available at the TI website 19 20 https://www.ti.com/lit/ds/symlink/lm95245.pdf 21 22 Author: Alexander Stein <alexander.stein@systec-electronic.com> 23 24 Description 25 ----------- 26 27 LM95235 and LM95245 are 11-bit digital temperature sensors with a 2-wire System 28 Management Bus (SMBus) interface and TruTherm technology that can monitor 29 the temperature of a remote diode as well as its own temperature. 30 The chips can be used to very accurately monitor the temperature of 31 external devices such as microprocessors. 32 33 All temperature values are given in millidegrees Celsius. Local temperature 34 is given within a range of -127 to +127.875 degrees. Remote temperatures are 35 given within a range of -127 to +255 degrees. Resolution depends on 36 temperature input and range. 37 38 Each sensor has its own critical limit. Additionally, there is a relative 39 hysteresis value common to both critical limits. To make life easier to 40 user-space applications, two absolute values are exported, one for each 41 channel, but these values are of course linked. Only the local hysteresis 42 can be set from user-space, and the same delta applies to the remote 43 hysteresis. 44 45 The lm95245 driver can change its update interval to a fixed set of values. 46 It will round up to the next selectable interval. See the datasheet for exact 47 values. Reading sensor values more often will do no harm, but will return 48 'old' values.
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