Documentation/hwmon/max1668

   1 Kernel driver max1668
   2 =====================
   3
   4 Supported chips:
   5   * Maxim MAX1668, MAX1805 and MAX1989
   6     Prefix: 'max1668'
   7     Addresses scanned: I2C 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x4c, 0x4d, 0x4e
   8     Datasheet: http://datasheets.maxim-ic.com/en/ds/MAX1668-MAX1989.pdf
   9
  10 Author:
  11     David George <david.george@ska.ac.za>
  12
  13 Description
  14 -----------
  15
  16 This driver implements support for the Maxim MAX1668, MAX1805 and MAX1989
  17 chips.
  18
  19 The three devices are very similar, but the MAX1805 has a reduced feature
  20 set; only two remote temperature inputs vs the four available on the other
  21 two ICs.
  22
  23 The driver is able to distinguish between the devices and creates sysfs
  24 entries as follows:
  25
  26 MAX1805, MAX1668 and MAX1989:
  27
  28 temp1_input     ro local (ambient) temperature
  29 temp1_max       rw local temperature maximum threshold for alarm
  30 temp1_max_alarm ro local temperature maximum threshold alarm
  31 temp1_min       rw local temperature minimum threshold for alarm
  32 temp1_min_alarm ro local temperature minimum threshold alarm
  33 temp2_input     ro remote temperature 1
  34 temp2_max       rw remote temperature 1 maximum threshold for alarm
  35 temp2_max_alarm ro remote temperature 1 maximum threshold alarm
  36 temp2_min       rw remote temperature 1 minimum threshold for alarm
  37 temp2_min_alarm ro remote temperature 1 minimum threshold alarm
  38 temp3_input     ro remote temperature 2
  39 temp3_max       rw remote temperature 2 maximum threshold for alarm
  40 temp3_max_alarm ro remote temperature 2 maximum threshold alarm
  41 temp3_min       rw remote temperature 2 minimum threshold for alarm
  42 temp3_min_alarm ro remote temperature 2 minimum threshold alarm
  43
  44 MAX1668 and MAX1989 only:
  45 temp4_input     ro remote temperature 3
  46 temp4_max       rw remote temperature 3 maximum threshold for alarm
  47 temp4_max_alarm ro remote temperature 3 maximum threshold alarm
  48 temp4_min       rw remote temperature 3 minimum threshold for alarm
  49 temp4_min_alarm ro remote temperature 3 minimum threshold alarm
  50 temp5_input     ro remote temperature 4
  51 temp5_max       rw remote temperature 4 maximum threshold for alarm
  52 temp5_max_alarm ro remote temperature 4 maximum threshold alarm
  53 temp5_min       rw remote temperature 4 minimum threshold for alarm
  54 temp5_min_alarm ro remote temperature 4 minimum threshold alarm
  55
  56 Module Parameters
  57 -----------------
  58
  59 * read_only: int
  60   Set to non-zero if you wish to prevent write access to alarm thresholds.