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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cma3000_d0x.rst (2923B)

      1CMA3000-D0x Accelerometer
      2=========================
      3
      4Supported chips:
      5* VTI CMA3000-D0x
      6
      7Datasheet:
      8  CMA3000-D0X Product Family Specification 8281000A.02.pdf
      9  <http://www.vti.fi/en/>
     10
     11:Author: Hemanth V <hemanthv@ti.com>
     12
     13
     14Description
     15-----------
     16
     17CMA3000 Tri-axis accelerometer supports Motion detect, Measurement and
     18Free fall modes.
     19
     20Motion Detect Mode:
     21    Its the low power mode where interrupts are generated only
     22    when motion exceeds the defined thresholds.
     23
     24Measurement Mode:
     25    This mode is used to read the acceleration data on X,Y,Z
     26    axis and supports 400, 100, 40 Hz sample frequency.
     27
     28Free fall Mode:
     29    This mode is intended to save system resources.
     30
     31Threshold values:
     32    Chip supports defining threshold values for above modes
     33    which includes time and g value. Refer product specifications for
     34    more details.
     35
     36CMA3000 chip supports mutually exclusive I2C and SPI interfaces for
     37communication, currently the driver supports I2C based communication only.
     38Initial configuration for bus mode is set in non volatile memory and can later
     39be modified through bus interface command.
     40
     41Driver reports acceleration data through input subsystem. It generates ABS_MISC
     42event with value 1 when free fall is detected.
     43
     44Platform data need to be configured for initial default values.
     45
     46Platform Data
     47-------------
     48
     49fuzz_x:
     50    Noise on X Axis
     51
     52fuzz_y:
     53    Noise on Y Axis
     54
     55fuzz_z:
     56    Noise on Z Axis
     57
     58g_range:
     59    G range in milli g i.e 2000 or 8000
     60
     61mode:
     62    Default Operating mode
     63
     64mdthr:
     65    Motion detect g range threshold value
     66
     67mdfftmr:
     68    Motion detect and free fall time threshold value
     69
     70ffthr:
     71    Free fall g range threshold value
     72
     73Input Interface
     74---------------
     75
     76Input driver version is 1.0.0
     77Input device ID: bus 0x18 vendor 0x0 product 0x0 version 0x0
     78Input device name: "cma3000-accelerometer"
     79
     80Supported events::
     81
     82  Event type 0 (Sync)
     83  Event type 3 (Absolute)
     84    Event code 0 (X)
     85      Value     47
     86      Min    -8000
     87      Max     8000
     88      Fuzz     200
     89    Event code 1 (Y)
     90      Value    -28
     91      Min    -8000
     92      Max     8000
     93      Fuzz     200
     94    Event code 2 (Z)
     95      Value    905
     96      Min    -8000
     97      Max     8000
     98      Fuzz     200
     99    Event code 40 (Misc)
    100      Value      0
    101      Min        0
    102      Max        1
    103  Event type 4 (Misc)
    104
    105
    106Register/Platform parameters Description
    107----------------------------------------
    108
    109mode::
    110
    111	0: power down mode
    112	1: 100 Hz Measurement mode
    113	2: 400 Hz Measurement mode
    114	3: 40 Hz Measurement mode
    115	4: Motion Detect mode (default)
    116	5: 100 Hz Free fall mode
    117	6: 40 Hz Free fall mode
    118	7: Power off mode
    119
    120grange::
    121
    122	2000: 2000 mg or 2G Range
    123	8000: 8000 mg or 8G Range
    124
    125mdthr::
    126
    127	X: X * 71mg (8G Range)
    128	X: X * 18mg (2G Range)
    129
    130mdfftmr::
    131
    132	X: (X & 0x70) * 100 ms (MDTMR)
    133	   (X & 0x0F) * 2.5 ms (FFTMR 400 Hz)
    134	   (X & 0x0F) * 10 ms  (FFTMR 100 Hz)
    135
    136ffthr::
    137
    138       X: (X >> 2) * 18mg (2G Range)
    139       X: (X & 0x0F) * 71 mg (8G Range)