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-Kernel driver ucd9000
-=====================
-
-Supported chips:
- * TI UCD90120, UCD90124, UCD9090, and UCD90910
- Prefixes: 'ucd90120', 'ucd90124', 'ucd9090', 'ucd90910'
- Addresses scanned: -
- Datasheets:
- http://focus.ti.com/lit/ds/symlink/ucd90120.pdf
- http://focus.ti.com/lit/ds/symlink/ucd90124.pdf
- http://focus.ti.com/lit/ds/symlink/ucd9090.pdf
- http://focus.ti.com/lit/ds/symlink/ucd90910.pdf
-
-Author: Guenter Roeck <guenter.roeck@ericsson.com>
-
-
-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 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 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 for
-details.
-
-
-Platform data support
----------------------
-
-The driver supports standard PMBus driver platform data. Please see
-Documentation/hwmon/pmbus 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.