1Kernel driver ucd9000 2===================== 3 4Supported chips: 5 * TI UCD90120, UCD90124, UCD9090, and UCD90910 6 Prefixes: 'ucd90120', 'ucd90124', 'ucd9090', 'ucd90910' 7 Addresses scanned: - 8 Datasheets: 9 http://focus.ti.com/lit/ds/symlink/ucd90120.pdf 10 http://focus.ti.com/lit/ds/symlink/ucd90124.pdf 11 http://focus.ti.com/lit/ds/symlink/ucd9090.pdf 12 http://focus.ti.com/lit/ds/symlink/ucd90910.pdf 13 14Author: Guenter Roeck <linux@roeck-us.net> 15 16 17Description 18----------- 19 20From datasheets: 21 22The UCD90120 Power Supply Sequencer and System Health Monitor monitors and 23sequences up to 12 independent voltage rails. The device integrates a 12-bit 24ADC with a 2.5V internal reference for monitoring up to 13 power supply voltage, 25current, or temperature inputs. 26 27The UCD90124 is a 12-rail PMBus/I2C addressable power-supply sequencer and 28system-health monitor. The device integrates a 12-bit ADC for monitoring up to 2913 power-supply voltage, current, or temperature inputs. Twenty-six GPIO pins 30can be used for power supply enables, power-on reset signals, external 31interrupts, cascading, or other system functions. Twelve of these pins offer PWM 32functionality. Using these pins, the UCD90124 offers support for fan control, 33margining, and general-purpose PWM functions. 34 35The UCD9090 is a 10-rail PMBus/I2C addressable power-supply sequencer and 36monitor. The device integrates a 12-bit ADC for monitoring up to 10 power-supply 37voltage inputs. Twenty-three GPIO pins can be used for power supply enables, 38power-on reset signals, external interrupts, cascading, or other system 39functions. Ten of these pins offer PWM functionality. Using these pins, the 40UCD9090 offers support for margining, and general-purpose PWM functions. 41 42The UCD90910 is a ten-rail I2C / PMBus addressable power-supply sequencer and 43system-health monitor. The device integrates a 12-bit ADC for monitoring up to 4413 power-supply voltage, current, or temperature inputs. 45 46This driver is a client driver to the core PMBus driver. Please see 47Documentation/hwmon/pmbus for details on PMBus client drivers. 48 49 50Usage Notes 51----------- 52 53This driver does not auto-detect devices. You will have to instantiate the 54devices explicitly. Please see Documentation/i2c/instantiating-devices for 55details. 56 57 58Platform data support 59--------------------- 60 61The driver supports standard PMBus driver platform data. Please see 62Documentation/hwmon/pmbus for details. 63 64 65Sysfs entries 66------------- 67 68The following attributes are supported. Limits are read-write; all other 69attributes are read-only. 70 71in[1-12]_label "vout[1-12]". 72in[1-12]_input Measured voltage. From READ_VOUT register. 73in[1-12]_min Minimum Voltage. From VOUT_UV_WARN_LIMIT register. 74in[1-12]_max Maximum voltage. From VOUT_OV_WARN_LIMIT register. 75in[1-12]_lcrit Critical minimum Voltage. VOUT_UV_FAULT_LIMIT register. 76in[1-12]_crit Critical maximum voltage. From VOUT_OV_FAULT_LIMIT register. 77in[1-12]_min_alarm Voltage low alarm. From VOLTAGE_UV_WARNING status. 78in[1-12]_max_alarm Voltage high alarm. From VOLTAGE_OV_WARNING status. 79in[1-12]_lcrit_alarm Voltage critical low alarm. From VOLTAGE_UV_FAULT status. 80in[1-12]_crit_alarm Voltage critical high alarm. From VOLTAGE_OV_FAULT status. 81 82curr[1-12]_label "iout[1-12]". 83curr[1-12]_input Measured current. From READ_IOUT register. 84curr[1-12]_max Maximum current. From IOUT_OC_WARN_LIMIT register. 85curr[1-12]_lcrit Critical minimum output current. From IOUT_UC_FAULT_LIMIT 86 register. 87curr[1-12]_crit Critical maximum current. From IOUT_OC_FAULT_LIMIT register. 88curr[1-12]_max_alarm Current high alarm. From IOUT_OC_WARNING status. 89curr[1-12]_crit_alarm Current critical high alarm. From IOUT_OC_FAULT status. 90 91 For each attribute index, either voltage or current is 92 reported, but not both. If voltage or current is 93 reported depends on the chip configuration. 94 95temp[1-2]_input Measured temperatures. From READ_TEMPERATURE_1 and 96 READ_TEMPERATURE_2 registers. 97temp[1-2]_max Maximum temperature. From OT_WARN_LIMIT register. 98temp[1-2]_crit Critical high temperature. From OT_FAULT_LIMIT register. 99temp[1-2]_max_alarm Temperature high alarm. 100temp[1-2]_crit_alarm Temperature critical high alarm. 101 102fan[1-4]_input Fan RPM. 103fan[1-4]_alarm Fan alarm. 104fan[1-4]_fault Fan fault. 105 106 Fan attributes are only available on chips supporting 107 fan control (UCD90124, UCD90910). Attribute files are 108 created only for enabled fans. 109 Note that even though UCD90910 supports up to 10 fans, 110 only up to four fans are currently supported. 111