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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ads7828.rst (2149B)

      1Kernel driver ads7828
      2=====================
      3
      4Supported chips:
      5
      6  * Texas Instruments/Burr-Brown ADS7828
      7
      8    Prefix: 'ads7828'
      9
     10    Datasheet: Publicly available at the Texas Instruments website:
     11
     12	       http://focus.ti.com/lit/ds/symlink/ads7828.pdf
     13
     14  * Texas Instruments ADS7830
     15
     16    Prefix: 'ads7830'
     17
     18    Datasheet: Publicly available at the Texas Instruments website:
     19
     20	       http://focus.ti.com/lit/ds/symlink/ads7830.pdf
     21
     22Authors:
     23	- Steve Hardy <shardy@redhat.com>
     24	- Vivien Didelot <vivien.didelot@savoirfairelinux.com>
     25	- Guillaume Roguez <guillaume.roguez@savoirfairelinux.com>
     26
     27Platform data
     28-------------
     29
     30The ads7828 driver accepts an optional ads7828_platform_data structure (defined
     31in include/linux/platform_data/ads7828.h). The structure fields are:
     32
     33* diff_input: (bool) Differential operation
     34    set to true for differential mode, false for default single ended mode.
     35
     36* ext_vref: (bool) External reference
     37    set to true if it operates with an external reference, false for default
     38    internal reference.
     39
     40* vref_mv: (unsigned int) Voltage reference
     41    if using an external reference, set this to the reference voltage in mV,
     42    otherwise it will default to the internal value (2500mV). This value will be
     43    bounded with limits accepted by the chip, described in the datasheet.
     44
     45 If no structure is provided, the configuration defaults to single ended
     46 operation and internal voltage reference (2.5V).
     47
     48Description
     49-----------
     50
     51This driver implements support for the Texas Instruments ADS7828 and ADS7830.
     52
     53The ADS7828 device is a 12-bit 8-channel A/D converter, while the ADS7830 does
     548-bit sampling.
     55
     56It can operate in single ended mode (8 +ve inputs) or in differential mode,
     57where 4 differential pairs can be measured.
     58
     59The chip also has the facility to use an external voltage reference.  This
     60may be required if your hardware supplies the ADS7828 from a 5V supply, see
     61the datasheet for more details.
     62
     63There is no reliable way to identify this chip, so the driver will not scan
     64some addresses to try to auto-detect it. That means that you will have to
     65statically declare the device in the platform support code.