Documentation/hwmon/ucd9200

   1 Kernel driver ucd9200
   2 =====================
   3
   4 Supported chips:
   5   * TI UCD9220, UCD9222, UCD9224, UCD9240, UCD9244, UCD9246, and UCD9248
   6     Prefixes: 'ucd9220', 'ucd9222', 'ucd9224', 'ucd9240', 'ucd9244', 'ucd9246',
   7         'ucd9248'
   8     Addresses scanned: -
   9     Datasheets:
  10         http://focus.ti.com/lit/ds/symlink/ucd9220.pdf
  11         http://focus.ti.com/lit/ds/symlink/ucd9222.pdf
  12         http://focus.ti.com/lit/ds/symlink/ucd9224.pdf
  13         http://focus.ti.com/lit/ds/symlink/ucd9240.pdf
  14         http://focus.ti.com/lit/ds/symlink/ucd9244.pdf
  15         http://focus.ti.com/lit/ds/symlink/ucd9246.pdf
  16         http://focus.ti.com/lit/ds/symlink/ucd9248.pdf
  17
  18 Author: Guenter Roeck <linux@roeck-us.net>
  19
  20
  21 Description
  22 -----------
  23
  24 [From datasheets] UCD9220, UCD9222, UCD9224, UCD9240, UCD9244, UCD9246, and
  25 UCD9248 are multi-rail, multi-phase synchronous buck digital PWM controllers
  26 designed for non-isolated DC/DC power applications. The devices integrate
  27 dedicated circuitry for DC/DC loop management with flash memory and a serial
  28 interface to support configuration, monitoring and management.
  29
  30 This driver is a client driver to the core PMBus driver. Please see
  31 Documentation/hwmon/pmbus for details on PMBus client drivers.
  32
  33
  34 Usage Notes
  35 -----------
  36
  37 This driver does not auto-detect devices. You will have to instantiate the
  38 devices explicitly. Please see Documentation/i2c/instantiating-devices for
  39 details.
  40
  41
  42 Platform data support
  43 ---------------------
  44
  45 The driver supports standard PMBus driver platform data. Please see
  46 Documentation/hwmon/pmbus for details.
  47
  48
  49 Sysfs entries
  50 -------------
  51
  52 The following attributes are supported. Limits are read-write; all other
  53 attributes are read-only.
  54
  55 in1_label               "vin".
  56 in1_input               Measured voltage. From READ_VIN register.
  57 in1_min                 Minimum Voltage. From VIN_UV_WARN_LIMIT register.
  58 in1_max                 Maximum voltage. From VIN_OV_WARN_LIMIT register.
  59 in1_lcrit               Critical minimum Voltage. VIN_UV_FAULT_LIMIT register.
  60 in1_crit                Critical maximum voltage. From VIN_OV_FAULT_LIMIT register.
  61 in1_min_alarm           Voltage low alarm. From VIN_UV_WARNING status.
  62 in1_max_alarm           Voltage high alarm. From VIN_OV_WARNING status.
  63 in1_lcrit_alarm         Voltage critical low alarm. From VIN_UV_FAULT status.
  64 in1_crit_alarm          Voltage critical high alarm. From VIN_OV_FAULT status.
  65
  66 in[2-5]_label           "vout[1-4]".
  67 in[2-5]_input           Measured voltage. From READ_VOUT register.
  68 in[2-5]_min             Minimum Voltage. From VOUT_UV_WARN_LIMIT register.
  69 in[2-5]_max             Maximum voltage. From VOUT_OV_WARN_LIMIT register.
  70 in[2-5]_lcrit           Critical minimum Voltage. VOUT_UV_FAULT_LIMIT register.
  71 in[2-5]_crit            Critical maximum voltage. From VOUT_OV_FAULT_LIMIT register.
  72 in[2-5]_min_alarm       Voltage low alarm. From VOLTAGE_UV_WARNING status.
  73 in[2-5]_max_alarm       Voltage high alarm. From VOLTAGE_OV_WARNING status.
  74 in[2-5]_lcrit_alarm     Voltage critical low alarm. From VOLTAGE_UV_FAULT status.
  75 in[2-5]_crit_alarm      Voltage critical high alarm. From VOLTAGE_OV_FAULT status.
  76
  77 curr1_label             "iin".
  78 curr1_input             Measured current. From READ_IIN register.
  79
  80 curr[2-5]_label         "iout[1-4]".
  81 curr[2-5]_input         Measured current. From READ_IOUT register.
  82 curr[2-5]_max           Maximum current. From IOUT_OC_WARN_LIMIT register.
  83 curr[2-5]_lcrit         Critical minimum output current. From IOUT_UC_FAULT_LIMIT
  84                         register.
  85 curr[2-5]_crit          Critical maximum current. From IOUT_OC_FAULT_LIMIT register.
  86 curr[2-5]_max_alarm     Current high alarm. From IOUT_OC_WARNING status.
  87 curr[2-5]_crit_alarm    Current critical high alarm. From IOUT_OC_FAULT status.
  88
  89 power1_input            Measured input power. From READ_PIN register.
  90 power1_label            "pin"
  91
  92 power[2-5]_input        Measured output power. From READ_POUT register.
  93 power[2-5]_label        "pout[1-4]"
  94
  95                         The number of output voltage, current, and power
  96                         attribute sets is determined by the number of enabled
  97                         rails. See chip datasheets for details.
  98
  99 temp[1-5]_input         Measured temperatures. From READ_TEMPERATURE_1 and
 100                         READ_TEMPERATURE_2 registers.
 101                         temp1 is the chip internal temperature. temp[2-5] are
 102                         rail temperatures.  temp[2-5] attributes are only
 103                         created for enabled rails. See chip datasheets for
 104                         details.
 105 temp[1-5]_max           Maximum temperature. From OT_WARN_LIMIT register.
 106 temp[1-5]_crit          Critical high temperature. From OT_FAULT_LIMIT register.
 107 temp[1-5]_max_alarm     Temperature high alarm.
 108 temp[1-5]_crit_alarm    Temperature critical high alarm.
 109
 110 fan1_input              Fan RPM. ucd9240 only.
 111 fan1_alarm              Fan alarm. ucd9240 only.
 112 fan1_fault              Fan fault. ucd9240 only.