Documentation/hwmon/mc13783-adc

   1 Kernel driver mc13783-adc
   2 =========================
   3
   4 Supported chips:
   5   * Freescale Atlas MC13783
   6     Prefix: 'mc13783'
   7     Datasheet: http://www.freescale.com/files/rf_if/doc/data_sheet/MC13783.pdf?fsrch=1
   8   * Freescale Atlas MC13892
   9     Prefix: 'mc13892'
  10     Datasheet: http://cache.freescale.com/files/analog/doc/data_sheet/MC13892.pdf?fsrch=1&sr=1
  11
  12 Authors:
  13     Sascha Hauer <s.hauer@pengutronix.de>
  14     Luotao Fu <l.fu@pengutronix.de>
  15
  16 Description
  17 -----------
  18
  19 The Freescale MC13783 and MC13892 are Power Management and Audio Circuits.
  20 Among other things they contain a 10-bit A/D converter. The converter has 16
  21 (MC13783) resp. 12 (MC13892) channels which can be used in different modes. The
  22 A/D converter has a resolution of 2.25mV.
  23
  24 Some channels can be used as General Purpose inputs or in a dedicated mode with
  25 a chip internal scaling applied .
  26
  27 Currently the driver only supports the Application Supply channel (BP / BPSNS),
  28 the General Purpose inputs and touchscreen.
  29
  30 See the following tables for the meaning of the different channels and their
  31 chip internal scaling:
  32
  33 MC13783:
  34 Channel Signal                                          Input Range     Scaling
  35 -------------------------------------------------------------------------------
  36 0       Battery Voltage (BATT)                          2.50 - 4.65V    -2.40V
  37 1       Battery Current (BATT - BATTISNS)               -50 - 50 mV     x20
  38 2       Application Supply (BP)                         2.50 - 4.65V    -2.40V
  39 3       Charger Voltage (CHRGRAW)                       0 - 10V /       /5
  40                                                         0 - 20V         /10
  41 4       Charger Current (CHRGISNSP-CHRGISNSN)           -0.25 - 0.25V   x4
  42 5       General Purpose ADIN5 / Battery Pack Thermistor 0 - 2.30V       No
  43 6       General Purpose ADIN6 / Backup Voltage (LICELL) 0 - 2.30V /     No /
  44                                                         1.50 - 3.50V    -1.20V
  45 7       General Purpose ADIN7 / UID / Die Temperature   0 - 2.30V /     No /
  46                                                         0 - 2.55V /     x0.9 / No
  47 8       General Purpose ADIN8                           0 - 2.30V       No
  48 9       General Purpose ADIN9                           0 - 2.30V       No
  49 10      General Purpose ADIN10                          0 - 2.30V       No
  50 11      General Purpose ADIN11                          0 - 2.30V       No
  51 12      General Purpose TSX1 / Touchscreen X-plate 1    0 - 2.30V       No
  52 13      General Purpose TSX2 / Touchscreen X-plate 2    0 - 2.30V       No
  53 14      General Purpose TSY1 / Touchscreen Y-plate 1    0 - 2.30V       No
  54 15      General Purpose TSY2 / Touchscreen Y-plate 2    0 - 2.30V       No
  55
  56 MC13892:
  57 Channel Signal                                          Input Range     Scaling
  58 -------------------------------------------------------------------------------
  59 0       Battery Voltage (BATT)                          0 - 4.8V        /2
  60 1       Battery Current (BATT - BATTISNSCC)             -60 - 60 mV     x20
  61 2       Application Supply (BPSNS)                      0 - 4.8V        /2
  62 3       Charger Voltage (CHRGRAW)                       0 - 12V /       /5
  63                                                         0 - 20V         /10
  64 4       Charger Current (CHRGISNS-BPSNS) /              -0.3 - 0.3V /   x4 /
  65         Touchscreen X-plate 1                           0 - 2.4V        No
  66 5       General Purpose ADIN5 / Battery Pack Thermistor 0 - 2.4V        No
  67 6       General Purpose ADIN6 / Backup Voltage (LICELL) 0 - 2.4V /      No
  68         Backup Voltage (LICELL)                         0 - 3.6V        x2/3
  69 7       General Purpose ADIN7 / UID / Die Temperature   0 - 2.4V /      No /
  70                                                         0 - 4.8V        /2
  71 12      General Purpose TSX1 / Touchscreen X-plate 1    0 - 2.4V        No
  72 13      General Purpose TSX2 / Touchscreen X-plate 2    0 - 2.4V        No
  73 14      General Purpose TSY1 / Touchscreen Y-plate 1    0 - 2.4V        No
  74 15      General Purpose TSY2 / Touchscreen Y-plate 2    0 - 2.4V        No