111 lines
4.4 KiB
Text
111 lines
4.4 KiB
Text
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Kernel driver ucd9000
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=====================
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Supported chips:
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* TI UCD90120, UCD90124, UCD9090, and UCD90910
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Prefixes: 'ucd90120', 'ucd90124', 'ucd9090', 'ucd90910'
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Addresses scanned: -
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Datasheets:
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http://focus.ti.com/lit/ds/symlink/ucd90120.pdf
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http://focus.ti.com/lit/ds/symlink/ucd90124.pdf
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http://focus.ti.com/lit/ds/symlink/ucd9090.pdf
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http://focus.ti.com/lit/ds/symlink/ucd90910.pdf
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Author: Guenter Roeck <guenter.roeck@ericsson.com>
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Description
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-----------
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From datasheets:
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The UCD90120 Power Supply Sequencer and System Health Monitor monitors and
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sequences up to 12 independent voltage rails. The device integrates a 12-bit
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ADC with a 2.5V internal reference for monitoring up to 13 power supply voltage,
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current, or temperature inputs.
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The UCD90124 is a 12-rail PMBus/I2C addressable power-supply sequencer and
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system-health monitor. The device integrates a 12-bit ADC for monitoring up to
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13 power-supply voltage, current, or temperature inputs. Twenty-six GPIO pins
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can be used for power supply enables, power-on reset signals, external
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interrupts, cascading, or other system functions. Twelve of these pins offer PWM
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functionality. Using these pins, the UCD90124 offers support for fan control,
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margining, and general-purpose PWM functions.
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The UCD9090 is a 10-rail PMBus/I2C addressable power-supply sequencer and
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monitor. The device integrates a 12-bit ADC for monitoring up to 10 power-supply
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voltage inputs. Twenty-three GPIO pins can be used for power supply enables,
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power-on reset signals, external interrupts, cascading, or other system
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functions. Ten of these pins offer PWM functionality. Using these pins, the
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UCD9090 offers support for margining, and general-purpose PWM functions.
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The UCD90910 is a ten-rail I2C / PMBus addressable power-supply sequencer and
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system-health monitor. The device integrates a 12-bit ADC for monitoring up to
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13 power-supply voltage, current, or temperature inputs.
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This driver is a client driver to the core PMBus driver. Please see
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Documentation/hwmon/pmbus for details on PMBus client drivers.
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Usage Notes
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-----------
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This driver does not auto-detect devices. You will have to instantiate the
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devices explicitly. Please see Documentation/i2c/instantiating-devices for
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details.
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Platform data support
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---------------------
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The driver supports standard PMBus driver platform data. Please see
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Documentation/hwmon/pmbus for details.
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Sysfs entries
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-------------
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The following attributes are supported. Limits are read-write; all other
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attributes are read-only.
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in[1-12]_label "vout[1-12]".
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in[1-12]_input Measured voltage. From READ_VOUT register.
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in[1-12]_min Minumum Voltage. From VOUT_UV_WARN_LIMIT register.
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in[1-12]_max Maximum voltage. From VOUT_OV_WARN_LIMIT register.
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in[1-12]_lcrit Critical minumum Voltage. VOUT_UV_FAULT_LIMIT register.
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in[1-12]_crit Critical maximum voltage. From VOUT_OV_FAULT_LIMIT register.
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in[1-12]_min_alarm Voltage low alarm. From VOLTAGE_UV_WARNING status.
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in[1-12]_max_alarm Voltage high alarm. From VOLTAGE_OV_WARNING status.
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in[1-12]_lcrit_alarm Voltage critical low alarm. From VOLTAGE_UV_FAULT status.
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in[1-12]_crit_alarm Voltage critical high alarm. From VOLTAGE_OV_FAULT status.
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curr[1-12]_label "iout[1-12]".
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curr[1-12]_input Measured current. From READ_IOUT register.
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curr[1-12]_max Maximum current. From IOUT_OC_WARN_LIMIT register.
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curr[1-12]_lcrit Critical minumum output current. From IOUT_UC_FAULT_LIMIT
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register.
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curr[1-12]_crit Critical maximum current. From IOUT_OC_FAULT_LIMIT register.
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curr[1-12]_max_alarm Current high alarm. From IOUT_OC_WARNING status.
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curr[1-12]_crit_alarm Current critical high alarm. From IOUT_OC_FAULT status.
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For each attribute index, either voltage or current is
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reported, but not both. If voltage or current is
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reported depends on the chip configuration.
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temp[1-2]_input Measured temperatures. From READ_TEMPERATURE_1 and
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READ_TEMPERATURE_2 registers.
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temp[1-2]_max Maximum temperature. From OT_WARN_LIMIT register.
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temp[1-2]_crit Critical high temperature. From OT_FAULT_LIMIT register.
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temp[1-2]_max_alarm Temperature high alarm.
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temp[1-2]_crit_alarm Temperature critical high alarm.
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fan[1-4]_input Fan RPM.
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fan[1-4]_alarm Fan alarm.
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fan[1-4]_fault Fan fault.
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Fan attributes are only available on chips supporting
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fan control (UCD90124, UCD90910). Attribute files are
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created only for enabled fans.
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Note that even though UCD90910 supports up to 10 fans,
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only up to four fans are currently supported.
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