1Kernel driver ucd9200
  2=====================
  3
  4Supported chips:
  5
  6  * TI UCD9220, UCD9222, UCD9224, UCD9240, UCD9244, UCD9246, and UCD9248
  7
  8    Prefixes: 'ucd9220', 'ucd9222', 'ucd9224', 'ucd9240', 'ucd9244', 'ucd9246',
  9    'ucd9248'
 10
 11    Addresses scanned: -
 12
 13    Datasheets:
 14
 15	- http://focus.ti.com/lit/ds/symlink/ucd9220.pdf
 16	- http://focus.ti.com/lit/ds/symlink/ucd9222.pdf
 17	- http://focus.ti.com/lit/ds/symlink/ucd9224.pdf
 18	- http://focus.ti.com/lit/ds/symlink/ucd9240.pdf
 19	- http://focus.ti.com/lit/ds/symlink/ucd9244.pdf
 20	- http://focus.ti.com/lit/ds/symlink/ucd9246.pdf
 21	- http://focus.ti.com/lit/ds/symlink/ucd9248.pdf
 22
 23Author: Guenter Roeck <linux@roeck-us.net>
 24
 25
 26Description
 27-----------
 28
 29[From datasheets] UCD9220, UCD9222, UCD9224, UCD9240, UCD9244, UCD9246, and
 30UCD9248 are multi-rail, multi-phase synchronous buck digital PWM controllers
 31designed for non-isolated DC/DC power applications. The devices integrate
 32dedicated circuitry for DC/DC loop management with flash memory and a serial
 33interface to support configuration, monitoring and management.
 34
 35This driver is a client driver to the core PMBus driver. Please see
 36Documentation/hwmon/pmbus.rst for details on PMBus client drivers.
 37
 38
 39Usage Notes
 40-----------
 41
 42This driver does not auto-detect devices. You will have to instantiate the
 43devices explicitly. Please see Documentation/i2c/instantiating-devices.rst for
 44details.
 45
 46
 47Platform data support
 48---------------------
 49
 50The driver supports standard PMBus driver platform data. Please see
 51Documentation/hwmon/pmbus.rst for details.
 52
 53
 54Sysfs entries
 55-------------
 56
 57The following attributes are supported. Limits are read-write; all other
 58attributes are read-only.
 59
 60======================= ========================================================
 61in1_label		"vin".
 62in1_input		Measured voltage. From READ_VIN register.
 63in1_min			Minimum Voltage. From VIN_UV_WARN_LIMIT register.
 64in1_max			Maximum voltage. From VIN_OV_WARN_LIMIT register.
 65in1_lcrit		Critical minimum Voltage. VIN_UV_FAULT_LIMIT register.
 66in1_crit		Critical maximum voltage. From VIN_OV_FAULT_LIMIT
 67			register.
 68in1_min_alarm		Voltage low alarm. From VIN_UV_WARNING status.
 69in1_max_alarm		Voltage high alarm. From VIN_OV_WARNING status.
 70in1_lcrit_alarm		Voltage critical low alarm. From VIN_UV_FAULT status.
 71in1_crit_alarm		Voltage critical high alarm. From VIN_OV_FAULT status.
 72
 73in[2-5]_label		"vout[1-4]".
 74in[2-5]_input		Measured voltage. From READ_VOUT register.
 75in[2-5]_min		Minimum Voltage. From VOUT_UV_WARN_LIMIT register.
 76in[2-5]_max		Maximum voltage. From VOUT_OV_WARN_LIMIT register.
 77in[2-5]_lcrit		Critical minimum Voltage. VOUT_UV_FAULT_LIMIT register.
 78in[2-5]_crit		Critical maximum voltage. From VOUT_OV_FAULT_LIMIT
 79			register.
 80in[2-5]_min_alarm	Voltage low alarm. From VOLTAGE_UV_WARNING status.
 81in[2-5]_max_alarm	Voltage high alarm. From VOLTAGE_OV_WARNING status.
 82in[2-5]_lcrit_alarm	Voltage critical low alarm. From VOLTAGE_UV_FAULT
 83			status.
 84in[2-5]_crit_alarm	Voltage critical high alarm. From VOLTAGE_OV_FAULT
 85			status.
 86
 87curr1_label		"iin".
 88curr1_input		Measured current. From READ_IIN register.
 89
 90curr[2-5]_label		"iout[1-4]".
 91curr[2-5]_input		Measured current. From READ_IOUT register.
 92curr[2-5]_max		Maximum current. From IOUT_OC_WARN_LIMIT register.
 93curr[2-5]_lcrit		Critical minimum output current. From
 94			IOUT_UC_FAULT_LIMIT register.
 95curr[2-5]_crit		Critical maximum current. From IOUT_OC_FAULT_LIMIT
 96			register.
 97curr[2-5]_max_alarm	Current high alarm. From IOUT_OC_WARNING status.
 98curr[2-5]_crit_alarm	Current critical high alarm. From IOUT_OC_FAULT status.
 99
100power1_input		Measured input power. From READ_PIN register.
101power1_label		"pin"
102
103power[2-5]_input	Measured output power. From READ_POUT register.
104power[2-5]_label	"pout[1-4]"
105
106			The number of output voltage, current, and power
107			attribute sets is determined by the number of enabled
108			rails. See chip datasheets for details.
109
110temp[1-5]_input		Measured temperatures. From READ_TEMPERATURE_1 and
111			READ_TEMPERATURE_2 registers.
112			temp1 is the chip internal temperature. temp[2-5] are
113			rail temperatures.  temp[2-5] attributes are only
114			created for enabled rails. See chip datasheets for
115			details.
116temp[1-5]_max		Maximum temperature. From OT_WARN_LIMIT register.
117temp[1-5]_crit		Critical high temperature. From OT_FAULT_LIMIT register.
118temp[1-5]_max_alarm	Temperature high alarm.
119temp[1-5]_crit_alarm	Temperature critical high alarm.
120
121fan1_input		Fan RPM. ucd9240 only.
122fan1_alarm		Fan alarm. ucd9240 only.
123fan1_fault		Fan fault. ucd9240 only.
124======================= ========================================================