Documentation/hwmon/max6639

   1 Kernel driver max6639
   2 =====================
   3
   4 Supported chips:
   5   * Maxim MAX6639
   6     Prefix: 'max6639'
   7     Addresses scanned: I2C 0x2c, 0x2e, 0x2f
   8     Datasheet: http://pdfserv.maxim-ic.com/en/ds/MAX6639.pdf
   9
  10 Authors:
  11     He Changqing <hechangqing@semptian.com>
  12     Roland Stigge <stigge@antcom.de>
  13
  14 Description
  15 -----------
  16
  17 This driver implements support for the Maxim MAX6639. This chip is a 2-channel
  18 temperature monitor with dual PWM fan speed controller. It can monitor its own
  19 temperature and one external diode-connected transistor or two external
  20 diode-connected transistors.
  21
  22 The following device attributes are implemented via sysfs:
  23
  24 Attribute              R/W  Contents
  25 ----------------------------------------------------------------------------
  26 temp1_input            R    Temperature channel 1 input (0..150 C)
  27 temp2_input            R    Temperature channel 2 input (0..150 C)
  28 temp1_fault            R    Temperature channel 1 diode fault
  29 temp2_fault            R    Temperature channel 2 diode fault
  30 temp1_max              RW   Set THERM temperature for input 1
  31                             (in C, see datasheet)
  32 temp2_max              RW   Set THERM temperature for input 2
  33 temp1_crit             RW   Set ALERT temperature for input 1
  34 temp2_crit             RW   Set ALERT temperature for input 2
  35 temp1_emergency        RW   Set OT temperature for input 1
  36                             (in C, see datasheet)
  37 temp2_emergency        RW   Set OT temperature for input 2
  38 pwm1                   RW   Fan 1 target duty cycle (0..255)
  39 pwm2                   RW   Fan 2 target duty cycle (0..255)
  40 fan1_input             R    TACH1 fan tachometer input (in RPM)
  41 fan2_input             R    TACH2 fan tachometer input (in RPM)
  42 fan1_fault             R    Fan 1 fault
  43 fan2_fault             R    Fan 2 fault
  44 temp1_max_alarm        R    Alarm on THERM temperature on channel 1
  45 temp2_max_alarm        R    Alarm on THERM temperature on channel 2
  46 temp1_crit_alarm       R    Alarm on ALERT temperature on channel 1
  47 temp2_crit_alarm       R    Alarm on ALERT temperature on channel 2
  48 temp1_emergency_alarm  R    Alarm on OT temperature on channel 1
  49 temp2_emergency_alarm  R    Alarm on OT temperature on channel 2