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:
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 Documentation/hwmon/pmbus.rst 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.rst for details.
Platform data support¶
The driver supports standard PMBus driver platform data. Please see Documentation/hwmon/pmbus.rst 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. |