1Kernel driver ucd9000 2===================== 3 4Supported chips: 5 6 * TI UCD90120, UCD90124, UCD90160, UCD9090, and UCD90910 7 8 Prefixes: 'ucd90120', 'ucd90124', 'ucd90160', 'ucd9090', 'ucd90910' 9 10 Addresses scanned: - 11 12 Datasheets: 13 14 - http://focus.ti.com/lit/ds/symlink/ucd90120.pdf 15 - http://focus.ti.com/lit/ds/symlink/ucd90124.pdf 16 - http://focus.ti.com/lit/ds/symlink/ucd90160.pdf 17 - http://focus.ti.com/lit/ds/symlink/ucd9090.pdf 18 - http://focus.ti.com/lit/ds/symlink/ucd90910.pdf 19 20Author: Guenter Roeck <linux@roeck-us.net> 21 22 23Description 24----------- 25 26From datasheets: 27 28The UCD90120 Power Supply Sequencer and System Health Monitor monitors and 29sequences up to 12 independent voltage rails. The device integrates a 12-bit 30ADC with a 2.5V internal reference for monitoring up to 13 power supply voltage, 31current, or temperature inputs. 32 33The UCD90124 is a 12-rail PMBus/I2C addressable power-supply sequencer and 34system-health monitor. The device integrates a 12-bit ADC for monitoring up to 3513 power-supply voltage, current, or temperature inputs. Twenty-six GPIO pins 36can be used for power supply enables, power-on reset signals, external 37interrupts, cascading, or other system functions. Twelve of these pins offer PWM 38functionality. Using these pins, the UCD90124 offers support for fan control, 39margining, and general-purpose PWM functions. 40 41The UCD90160 is a 16-rail PMBus/I2C addressable power-supply sequencer and 42monitor. The device integrates a 12-bit ADC for monitoring up to 16 power-supply 43voltage inputs. Twenty-six GPIO pins can be used for power supply enables, 44power-on reset signals, external interrupts, cascading, or other system 45functions. Twelve of these pins offer PWM functionality. Using these pins, the 46UCD90160 offers support for margining, and general-purpose PWM functions. 47 48The UCD9090 is a 10-rail PMBus/I2C addressable power-supply sequencer and 49monitor. The device integrates a 12-bit ADC for monitoring up to 10 power-supply 50voltage inputs. Twenty-three GPIO pins can be used for power supply enables, 51power-on reset signals, external interrupts, cascading, or other system 52functions. Ten of these pins offer PWM functionality. Using these pins, the 53UCD9090 offers support for margining, and general-purpose PWM functions. 54 55The UCD90910 is a ten-rail I2C / PMBus addressable power-supply sequencer and 56system-health monitor. The device integrates a 12-bit ADC for monitoring up to 5713 power-supply voltage, current, or temperature inputs. 58 59This driver is a client driver to the core PMBus driver. Please see 60Documentation/hwmon/pmbus.rst for details on PMBus client drivers. 61 62 63Usage Notes 64----------- 65 66This driver does not auto-detect devices. You will have to instantiate the 67devices explicitly. Please see Documentation/i2c/instantiating-devices for 68details. 69 70 71Platform data support 72--------------------- 73 74The driver supports standard PMBus driver platform data. Please see 75Documentation/hwmon/pmbus.rst for details. 76 77 78Sysfs entries 79------------- 80 81The following attributes are supported. Limits are read-write; all other 82attributes are read-only. 83 84======================= ======================================================== 85in[1-12]_label "vout[1-12]". 86in[1-12]_input Measured voltage. From READ_VOUT register. 87in[1-12]_min Minimum Voltage. From VOUT_UV_WARN_LIMIT register. 88in[1-12]_max Maximum voltage. From VOUT_OV_WARN_LIMIT register. 89in[1-12]_lcrit Critical minimum Voltage. VOUT_UV_FAULT_LIMIT register. 90in[1-12]_crit Critical maximum voltage. From VOUT_OV_FAULT_LIMIT 91 register. 92in[1-12]_min_alarm Voltage low alarm. From VOLTAGE_UV_WARNING status. 93in[1-12]_max_alarm Voltage high alarm. From VOLTAGE_OV_WARNING status. 94in[1-12]_lcrit_alarm Voltage critical low alarm. From VOLTAGE_UV_FAULT 95 status. 96in[1-12]_crit_alarm Voltage critical high alarm. From VOLTAGE_OV_FAULT 97 status. 98 99curr[1-12]_label "iout[1-12]". 100curr[1-12]_input Measured current. From READ_IOUT register. 101curr[1-12]_max Maximum current. From IOUT_OC_WARN_LIMIT register. 102curr[1-12]_lcrit Critical minimum output current. From 103 IOUT_UC_FAULT_LIMIT register. 104curr[1-12]_crit Critical maximum current. From IOUT_OC_FAULT_LIMIT 105 register. 106curr[1-12]_max_alarm Current high alarm. From IOUT_OC_WARNING status. 107curr[1-12]_crit_alarm Current critical high alarm. From IOUT_OC_FAULT status. 108 109 For each attribute index, either voltage or current is 110 reported, but not both. If voltage or current is 111 reported depends on the chip configuration. 112 113temp[1-2]_input Measured temperatures. From READ_TEMPERATURE_1 and 114 READ_TEMPERATURE_2 registers. 115temp[1-2]_max Maximum temperature. From OT_WARN_LIMIT register. 116temp[1-2]_crit Critical high temperature. From OT_FAULT_LIMIT register. 117temp[1-2]_max_alarm Temperature high alarm. 118temp[1-2]_crit_alarm Temperature critical high alarm. 119 120fan[1-4]_input Fan RPM. 121fan[1-4]_alarm Fan alarm. 122fan[1-4]_fault Fan fault. 123 124 Fan attributes are only available on chips supporting 125 fan control (UCD90124, UCD90910). Attribute files are 126 created only for enabled fans. 127 Note that even though UCD90910 supports up to 10 fans, 128 only up to four fans are currently supported. 129======================= ======================================================== 130