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Documentation/hwmon/ucd9200 4.3 KB
84fc4585c   Guenter Roeck   hwmon: (pmbus) Ad...
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  Kernel driver ucd9200
  =====================
  
  Supported chips:
    * TI UCD9220, UCD9222, UCD9224, UCD9240, UCD9244, UCD9246, and UCD9248
      Prefixes: 'ucd9220', 'ucd9222', 'ucd9224', 'ucd9240', 'ucd9244', 'ucd9246',
  	'ucd9248'
      Addresses scanned: -
      Datasheets:
  	http://focus.ti.com/lit/ds/symlink/ucd9220.pdf
  	http://focus.ti.com/lit/ds/symlink/ucd9222.pdf
  	http://focus.ti.com/lit/ds/symlink/ucd9224.pdf
  	http://focus.ti.com/lit/ds/symlink/ucd9240.pdf
  	http://focus.ti.com/lit/ds/symlink/ucd9244.pdf
  	http://focus.ti.com/lit/ds/symlink/ucd9246.pdf
  	http://focus.ti.com/lit/ds/symlink/ucd9248.pdf
  
  Author: Guenter Roeck <guenter.roeck@ericsson.com>
  
  
  Description
  -----------
  
  [From datasheets] UCD9220, UCD9222, UCD9224, UCD9240, UCD9244, UCD9246, and
  UCD9248 are multi-rail, multi-phase synchronous buck digital PWM controllers
  designed for non-isolated DC/DC power applications. The devices integrate
  dedicated circuitry for DC/DC loop management with flash memory and a serial
  interface to support configuration, monitoring and management.
  
  This driver is a client driver to the core PMBus driver. Please see
  Documentation/hwmon/pmbus for details on PMBus client drivers.
  
  
  Usage Notes
  -----------
  
  This driver does not auto-detect devices. You will have to instantiate the
  devices explicitly. Please see Documentation/i2c/instantiating-devices for
  details.
  
  
  Platform data support
  ---------------------
  
  The driver supports standard PMBus driver platform data. Please see
  Documentation/hwmon/pmbus for details.
  
  
  Sysfs entries
  -------------
  
  The following attributes are supported. Limits are read-write; all other
  attributes are read-only.
  
  in1_label		"vin".
  in1_input		Measured voltage. From READ_VIN register.
  in1_min			Minumum Voltage. From VIN_UV_WARN_LIMIT register.
  in1_max			Maximum voltage. From VIN_OV_WARN_LIMIT register.
  in1_lcrit		Critical minumum Voltage. VIN_UV_FAULT_LIMIT register.
  in1_crit		Critical maximum voltage. From VIN_OV_FAULT_LIMIT register.
  in1_min_alarm		Voltage low alarm. From VIN_UV_WARNING status.
  in1_max_alarm		Voltage high alarm. From VIN_OV_WARNING status.
  in1_lcrit_alarm		Voltage critical low alarm. From VIN_UV_FAULT status.
  in1_crit_alarm		Voltage critical high alarm. From VIN_OV_FAULT status.
  
  in[2-5]_label		"vout[1-4]".
  in[2-5]_input		Measured voltage. From READ_VOUT register.
  in[2-5]_min		Minumum Voltage. From VOUT_UV_WARN_LIMIT register.
  in[2-5]_max		Maximum voltage. From VOUT_OV_WARN_LIMIT register.
  in[2-5]_lcrit		Critical minumum Voltage. VOUT_UV_FAULT_LIMIT register.
  in[2-5]_crit		Critical maximum voltage. From VOUT_OV_FAULT_LIMIT register.
  in[2-5]_min_alarm	Voltage low alarm. From VOLTAGE_UV_WARNING status.
  in[2-5]_max_alarm	Voltage high alarm. From VOLTAGE_OV_WARNING status.
  in[2-5]_lcrit_alarm	Voltage critical low alarm. From VOLTAGE_UV_FAULT status.
  in[2-5]_crit_alarm	Voltage critical high alarm. From VOLTAGE_OV_FAULT status.
  
  curr1_label		"iin".
  curr1_input		Measured current. From READ_IIN register.
  
  curr[2-5]_label		"iout[1-4]".
  curr[2-5]_input		Measured current. From READ_IOUT register.
  curr[2-5]_max		Maximum current. From IOUT_OC_WARN_LIMIT register.
  curr[2-5]_lcrit		Critical minumum output current. From IOUT_UC_FAULT_LIMIT
  			register.
  curr[2-5]_crit		Critical maximum current. From IOUT_OC_FAULT_LIMIT register.
  curr[2-5]_max_alarm	Current high alarm. From IOUT_OC_WARNING status.
  curr[2-5]_crit_alarm	Current critical high alarm. From IOUT_OC_FAULT status.
  
  power1_input		Measured input power. From READ_PIN register.
  power1_label		"pin"
  
  power[2-5]_input	Measured output power. From READ_POUT register.
  power[2-5]_label	"pout[1-4]"
  
  			The number of output voltage, current, and power
  			attribute sets is determined by the number of enabled
  			rails. See chip datasheets for details.
  
  temp[1-5]_input		Measured temperatures. From READ_TEMPERATURE_1 and
  		        READ_TEMPERATURE_2 registers.
  			temp1 is the chip internal temperature. temp[2-5] are
  			rail temperatures.  temp[2-5] attributes are only
  			created for enabled rails. See chip datasheets for
  			details.
  temp[1-5]_max		Maximum temperature. From OT_WARN_LIMIT register.
  temp[1-5]_crit		Critical high temperature. From OT_FAULT_LIMIT register.
  temp[1-5]_max_alarm	Temperature high alarm.
  temp[1-5]_crit_alarm	Temperature critical high alarm.
  
  fan1_input		Fan RPM. ucd9240 only.
  fan1_alarm		Fan alarm. ucd9240 only.
  fan1_fault		Fan fault. ucd9240 only.