Kernel driver ucd9000¶
Supported chips:
TI UCD90120, UCD90124, UCD90160, UCD9090, and UCD90910
Prefixes: 'ucd90120', 'ucd90124', 'ucd90160', 'ucd9090', 'ucd90910'
Addresses scanned: -
Datasheets:
Author: Guenter Roeck <linux@roeck-us.net>
Description¶
From datasheets:
The UCD90120 Power Supply Sequencer and System Health Monitor monitors and sequences up to 12 independent voltage rails. The device integrates a 12-bit ADC with a 2.5V internal reference for monitoring up to 13 power supply voltage, current, or temperature inputs.
The UCD90124 is a 12-rail PMBus/I2C addressable power-supply sequencer and system-health monitor. The device integrates a 12-bit ADC for monitoring up to 13 power-supply voltage, current, or temperature inputs. Twenty-six GPIO pins can be used for power supply enables, power-on reset signals, external interrupts, cascading, or other system functions. Twelve of these pins offer PWM functionality. Using these pins, the UCD90124 offers support for fan control, margining, and general-purpose PWM functions.
The UCD90160 is a 16-rail PMBus/I2C addressable power-supply sequencer and monitor. The device integrates a 12-bit ADC for monitoring up to 16 power-supply voltage inputs. Twenty-six GPIO pins can be used for power supply enables, power-on reset signals, external interrupts, cascading, or other system functions. Twelve of these pins offer PWM functionality. Using these pins, the UCD90160 offers support for margining, and general-purpose PWM functions.
The UCD9090 is a 10-rail PMBus/I2C addressable power-supply sequencer and monitor. The device integrates a 12-bit ADC for monitoring up to 10 power-supply voltage inputs. Twenty-three GPIO pins can be used for power supply enables, power-on reset signals, external interrupts, cascading, or other system functions. Ten of these pins offer PWM functionality. Using these pins, the UCD9090 offers support for margining, and general-purpose PWM functions.
The UCD90910 is a ten-rail I2C / PMBus addressable power-supply sequencer and system-health monitor. The device integrates a 12-bit ADC for monitoring up to 13 power-supply voltage, current, or temperature inputs.
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.
in[1-12]_label |
"vout[1-12]". |
in[1-12]_input |
Measured voltage. From READ_VOUT register. |
in[1-12]_min |
Minimum Voltage. From VOUT_UV_WARN_LIMIT register. |
in[1-12]_max |
Maximum voltage. From VOUT_OV_WARN_LIMIT register. |
in[1-12]_lcrit |
Critical minimum Voltage. VOUT_UV_FAULT_LIMIT register. |
in[1-12]_crit |
Critical maximum voltage. From VOUT_OV_FAULT_LIMIT register. |
in[1-12]_min_alarm |
Voltage low alarm. From VOLTAGE_UV_WARNING status. |
in[1-12]_max_alarm |
Voltage high alarm. From VOLTAGE_OV_WARNING status. |
in[1-12]_lcrit_alarm |
Voltage critical low alarm. From VOLTAGE_UV_FAULT status. |
in[1-12]_crit_alarm |
Voltage critical high alarm. From VOLTAGE_OV_FAULT status. |
curr[1-12]_label |
"iout[1-12]". |
curr[1-12]_input |
Measured current. From READ_IOUT register. |
curr[1-12]_max |
Maximum current. From IOUT_OC_WARN_LIMIT register. |
curr[1-12]_lcrit |
Critical minimum output current. From IOUT_UC_FAULT_LIMIT register. |
curr[1-12]_crit |
Critical maximum current. From IOUT_OC_FAULT_LIMIT register. |
curr[1-12]_max_alarm |
Current high alarm. From IOUT_OC_WARNING status. |
curr[1-12]_crit_alarm |
Current critical high alarm. From IOUT_OC_FAULT status. For each attribute index, either voltage or current is reported, but not both. If voltage or current is reported depends on the chip configuration. |
temp[1-2]_input |
Measured temperatures. From READ_TEMPERATURE_1 and READ_TEMPERATURE_2 registers. |
temp[1-2]_max |
Maximum temperature. From OT_WARN_LIMIT register. |
temp[1-2]_crit |
Critical high temperature. From OT_FAULT_LIMIT register. |
temp[1-2]_max_alarm |
Temperature high alarm. |
temp[1-2]_crit_alarm |
Temperature critical high alarm. |
fan[1-4]_input |
Fan RPM. |
fan[1-4]_alarm |
Fan alarm. |
fan[1-4]_fault |
Fan fault. Fan attributes are only available on chips supporting fan control (UCD90124, UCD90910). Attribute files are created only for enabled fans. Note that even though UCD90910 supports up to 10 fans, only up to four fans are currently supported. |