cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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lm75.rst (4346B)

      1Kernel driver lm75
      2==================
      3
      4Supported chips:
      5
      6  * National Semiconductor LM75
      7
      8    Prefix: 'lm75'
      9
     10    Addresses scanned: I2C 0x48 - 0x4f
     11
     12    Datasheet: Publicly available at the National Semiconductor website
     13
     14	       http://www.national.com/
     15
     16  * National Semiconductor LM75A
     17
     18    Prefix: 'lm75a'
     19
     20    Addresses scanned: I2C 0x48 - 0x4f
     21
     22    Datasheet: Publicly available at the National Semiconductor website
     23
     24	       http://www.national.com/
     25
     26  * Dallas Semiconductor (now Maxim) DS75, DS1775, DS7505
     27
     28    Prefixes: 'ds75', 'ds1775', 'ds7505'
     29
     30    Addresses scanned: none
     31
     32    Datasheet: Publicly available at the Maxim website
     33
     34	       https://www.maximintegrated.com/
     35
     36  * Maxim MAX6625, MAX6626, MAX31725, MAX31726
     37
     38    Prefixes: 'max6625', 'max6626', 'max31725', 'max31726'
     39
     40    Addresses scanned: none
     41
     42    Datasheet: Publicly available at the Maxim website
     43
     44	       http://www.maxim-ic.com/
     45
     46  * Microchip (TelCom) TCN75
     47
     48    Prefix: 'tcn75'
     49
     50    Addresses scanned: none
     51
     52    Datasheet: Publicly available at the Microchip website
     53
     54	       http://www.microchip.com/
     55
     56  * Microchip MCP9800, MCP9801, MCP9802, MCP9803
     57
     58    Prefix: 'mcp980x'
     59
     60    Addresses scanned: none
     61
     62    Datasheet: Publicly available at the Microchip website
     63
     64	       http://www.microchip.com/
     65
     66  * Analog Devices ADT75
     67
     68    Prefix: 'adt75'
     69
     70    Addresses scanned: none
     71
     72    Datasheet: Publicly available at the Analog Devices website
     73
     74	       https://www.analog.com/adt75
     75
     76  * ST Microelectronics STDS75
     77
     78    Prefix: 'stds75'
     79
     80    Addresses scanned: none
     81
     82    Datasheet: Publicly available at the ST website
     83
     84	       http://www.st.com/internet/analog/product/121769.jsp
     85
     86  * ST Microelectronics STLM75
     87
     88    Prefix: 'stlm75'
     89
     90    Addresses scanned: none
     91
     92    Datasheet: Publicly available at the ST website
     93
     94	       https://www.st.com/resource/en/datasheet/stlm75.pdf
     95
     96  * Texas Instruments TMP100, TMP101, TMP105, TMP112, TMP75, TMP75B, TMP75C, TMP175, TMP275, TMP1075
     97
     98    Prefixes: 'tmp100', 'tmp101', 'tmp105', 'tmp112', 'tmp175', 'tmp75', 'tmp75b', 'tmp75c', 'tmp275', 'tmp1075'
     99
    100    Addresses scanned: none
    101
    102    Datasheet: Publicly available at the Texas Instruments website
    103
    104	       https://www.ti.com/product/tmp100
    105
    106	       https://www.ti.com/product/tmp101
    107
    108	       https://www.ti.com/product/tmp105
    109
    110	       https://www.ti.com/product/tmp112
    111
    112	       https://www.ti.com/product/tmp75
    113
    114	       https://www.ti.com/product/tmp75b
    115
    116	       https://www.ti.com/product/tmp75c
    117
    118	       https://www.ti.com/product/tmp175
    119
    120	       https://www.ti.com/product/tmp275
    121
    122         https://www.ti.com/product/TMP1075
    123
    124  * NXP LM75B, PCT2075
    125
    126    Prefix: 'lm75b', 'pct2075'
    127
    128    Addresses scanned: none
    129
    130    Datasheet: Publicly available at the NXP website
    131
    132	       https://www.nxp.com/documents/data_sheet/LM75B.pdf
    133
    134               https://www.nxp.com/docs/en/data-sheet/PCT2075.pdf
    135
    136Author: Frodo Looijaard <frodol@dds.nl>
    137
    138Description
    139-----------
    140
    141The LM75 implements one temperature sensor. Limits can be set through the
    142Overtemperature Shutdown register and Hysteresis register. Each value can be
    143set and read to half-degree accuracy.
    144An alarm is issued (usually to a connected LM78) when the temperature
    145gets higher then the Overtemperature Shutdown value; it stays on until
    146the temperature falls below the Hysteresis value.
    147All temperatures are in degrees Celsius, and are guaranteed within a
    148range of -55 to +125 degrees.
    149
    150The driver caches the values for a period varying between 1 second for the
    151slowest chips and 125 ms for the fastest chips; reading it more often
    152will do no harm, but will return 'old' values.
    153
    154The original LM75 was typically used in combination with LM78-like chips
    155on PC motherboards, to measure the temperature of the processor(s). Clones
    156are now used in various embedded designs.
    157
    158The LM75 is essentially an industry standard; there may be other
    159LM75 clones not listed here, with or without various enhancements,
    160that are supported. The clones are not detected by the driver, unless
    161they reproduce the exact register tricks of the original LM75, and must
    162therefore be instantiated explicitly. Higher resolution up to 16-bit
    163is supported by this driver, other specific enhancements are not.
    164
    165The LM77 is not supported, contrary to what we pretended for a long time.
    166Both chips are simply not compatible, value encoding differs.