Documentation/hwmon/mc13783-adc.rst

   1 Kernel driver mc13783-adc
   2 =========================
   3
   4 Supported chips:
   5
   6   * Freescale MC13783
   7
   8     Prefix: 'mc13783'
   9
  10     Datasheet: https://www.nxp.com/docs/en/data-sheet/MC13783.pdf
  11
  12   * Freescale MC13892
  13
  14     Prefix: 'mc13892'
  15
  16     Datasheet: https://www.nxp.com/docs/en/data-sheet/MC13892.pdf
  17
  18
  19
  20 Authors:
  21
  22    - Sascha Hauer <s.hauer@pengutronix.de>
  23    - Luotao Fu <l.fu@pengutronix.de>
  24
  25 Description
  26 -----------
  27
  28 The Freescale MC13783 and MC13892 are Power Management and Audio Circuits.
  29 Among other things they contain a 10-bit A/D converter. The converter has 16
  30 (MC13783) resp. 12 (MC13892) channels which can be used in different modes. The
  31 A/D converter has a resolution of 2.25mV.
  32
  33 Some channels can be used as General Purpose inputs or in a dedicated mode with
  34 a chip internal scaling applied .
  35
  36 Currently the driver only supports the Application Supply channel (BP / BPSNS),
  37 the General Purpose inputs and touchscreen.
  38
  39 See the following tables for the meaning of the different channels and their
  40 chip internal scaling:
  41
  42 - MC13783:
  43
  44 ======= =============================================== =============== =======
  45 Channel Signal                                          Input Range     Scaling
  46 ======= =============================================== =============== =======
  47 0       Battery Voltage (BATT)                          2.50 - 4.65V    -2.40V
  48 1       Battery Current (BATT - BATTISNS)               -50 - 50 mV     x20
  49 2       Application Supply (BP)                         2.50 - 4.65V    -2.40V
  50 3       Charger Voltage (CHRGRAW)                       0 - 10V /       /5
  51                                                         0 - 20V         /10
  52 4       Charger Current (CHRGISNSP-CHRGISNSN)           -0.25 - 0.25V   x4
  53 5       General Purpose ADIN5 / Battery Pack Thermistor 0 - 2.30V       No
  54 6       General Purpose ADIN6 / Backup Voltage (LICELL) 0 - 2.30V /     No /
  55                                                         1.50 - 3.50V    -1.20V
  56 7       General Purpose ADIN7 / UID / Die Temperature   0 - 2.30V /     No /
  57                                                         0 - 2.55V /     x0.9 / No
  58 8       General Purpose ADIN8                           0 - 2.30V       No
  59 9       General Purpose ADIN9                           0 - 2.30V       No
  60 10      General Purpose ADIN10                          0 - 2.30V       No
  61 11      General Purpose ADIN11                          0 - 2.30V       No
  62 12      General Purpose TSX1 / Touchscreen X-plate 1    0 - 2.30V       No
  63 13      General Purpose TSX2 / Touchscreen X-plate 2    0 - 2.30V       No
  64 14      General Purpose TSY1 / Touchscreen Y-plate 1    0 - 2.30V       No
  65 15      General Purpose TSY2 / Touchscreen Y-plate 2    0 - 2.30V       No
  66 ======= =============================================== =============== =======
  67
  68 - MC13892:
  69
  70 ======= =============================================== =============== =======
  71 Channel Signal                                          Input Range     Scaling
  72 ======= =============================================== =============== =======
  73 0       Battery Voltage (BATT)                          0 - 4.8V        /2
  74 1       Battery Current (BATT - BATTISNSCC)             -60 - 60 mV     x20
  75 2       Application Supply (BPSNS)                      0 - 4.8V        /2
  76 3       Charger Voltage (CHRGRAW)                       0 - 12V /       /5
  77                                                         0 - 20V         /10
  78 4       Charger Current (CHRGISNS-BPSNS) /              -0.3 - 0.3V /   x4 /
  79         Touchscreen X-plate 1                           0 - 2.4V        No
  80 5       General Purpose ADIN5 / Battery Pack Thermistor 0 - 2.4V        No
  81 6       General Purpose ADIN6 / Backup Voltage (LICELL) 0 - 2.4V /      No
  82         Backup Voltage (LICELL)                         0 - 3.6V        x2/3
  83 7       General Purpose ADIN7 / UID / Die Temperature   0 - 2.4V /      No /
  84                                                         0 - 4.8V        /2
  85 12      General Purpose TSX1 / Touchscreen X-plate 1    0 - 2.4V        No
  86 13      General Purpose TSX2 / Touchscreen X-plate 2    0 - 2.4V        No
  87 14      General Purpose TSY1 / Touchscreen Y-plate 1    0 - 2.4V        No
  88 15      General Purpose TSY2 / Touchscreen Y-plate 2    0 - 2.4V        No
  89 ======= =============================================== =============== =======