Kernel driver ucd9200

Supported chips:

Author: Guenter Roeck <linux@roeck-us.net>

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 Kernel driver 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 How to instantiate I2C devices for details.

Platform data support

The driver supports standard PMBus driver platform data. Please see Kernel driver 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

Minimum Voltage. From VIN_UV_WARN_LIMIT register.

in1_max

Maximum voltage. From VIN_OV_WARN_LIMIT register.

in1_lcrit

Critical minimum 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

Minimum Voltage. From VOUT_UV_WARN_LIMIT register.

in[2-5]_max

Maximum voltage. From VOUT_OV_WARN_LIMIT register.

in[2-5]_lcrit

Critical minimum 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 minimum 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.