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 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. |