1Kernel driver max34440 2====================== 3 4Supported chips: 5 * Maxim MAX34440 6 Prefixes: 'max34440' 7 Addresses scanned: - 8 Datasheet: http://datasheets.maxim-ic.com/en/ds/MAX34440.pdf 9 * Maxim MAX34441 10 PMBus 5-Channel Power-Supply Manager and Intelligent Fan Controller 11 Prefixes: 'max34441' 12 Addresses scanned: - 13 Datasheet: http://datasheets.maxim-ic.com/en/ds/MAX34441.pdf 14 * Maxim MAX34446 15 PMBus Power-Supply Data Logger 16 Prefixes: 'max34446' 17 Addresses scanned: - 18 Datasheet: http://datasheets.maxim-ic.com/en/ds/MAX34446.pdf 19 20Author: Guenter Roeck <guenter.roeck@ericsson.com> 21 22 23Description 24----------- 25 26This driver supports hardware montoring for Maxim MAX34440 PMBus 6-Channel 27Power-Supply Manager, MAX34441 PMBus 5-Channel Power-Supply Manager 28and Intelligent Fan Controller, and MAX34446 PMBus Power-Supply Data Logger. 29 30The driver is a client driver to the core PMBus driver. Please see 31Documentation/hwmon/pmbus for details on PMBus client drivers. 32 33 34Usage Notes 35----------- 36 37This driver does not auto-detect devices. You will have to instantiate the 38devices explicitly. Please see Documentation/i2c/instantiating-devices for 39details. 40 41For MAX34446, the value of the currX_crit attribute determines if current or 42voltage measurement is enabled for a given channel. Voltage measurement is 43enabled if currX_crit is set to 0; current measurement is enabled if the 44attribute is set to a positive value. Power measurement is only enabled if 45channel 1 (3) is configured for voltage measurement, and channel 2 (4) is 46configured for current measurement. 47 48 49Platform data support 50--------------------- 51 52The driver supports standard PMBus driver platform data. 53 54 55Sysfs entries 56------------- 57 58The following attributes are supported. Limits are read-write; all other 59attributes are read-only. 60 61in[1-6]_label "vout[1-6]". 62in[1-6]_input Measured voltage. From READ_VOUT register. 63in[1-6]_min Minimum Voltage. From VOUT_UV_WARN_LIMIT register. 64in[1-6]_max Maximum voltage. From VOUT_OV_WARN_LIMIT register. 65in[1-6]_lcrit Critical minimum Voltage. VOUT_UV_FAULT_LIMIT register. 66in[1-6]_crit Critical maximum voltage. From VOUT_OV_FAULT_LIMIT register. 67in[1-6]_min_alarm Voltage low alarm. From VOLTAGE_UV_WARNING status. 68in[1-6]_max_alarm Voltage high alarm. From VOLTAGE_OV_WARNING status. 69in[1-6]_lcrit_alarm Voltage critical low alarm. From VOLTAGE_UV_FAULT status. 70in[1-6]_crit_alarm Voltage critical high alarm. From VOLTAGE_OV_FAULT status. 71in[1-6]_lowest Historical minimum voltage. 72in[1-6]_highest Historical maximum voltage. 73in[1-6]_reset_history Write any value to reset history. 74 75 MAX34446 only supports in[1-4]. 76 77curr[1-6]_label "iout[1-6]". 78curr[1-6]_input Measured current. From READ_IOUT register. 79curr[1-6]_max Maximum current. From IOUT_OC_WARN_LIMIT register. 80curr[1-6]_crit Critical maximum current. From IOUT_OC_FAULT_LIMIT register. 81curr[1-6]_max_alarm Current high alarm. From IOUT_OC_WARNING status. 82curr[1-6]_crit_alarm Current critical high alarm. From IOUT_OC_FAULT status. 83curr[1-4]_average Historical average current (MAX34446 only). 84curr[1-6]_highest Historical maximum current. 85curr[1-6]_reset_history Write any value to reset history. 86 87 in6 and curr6 attributes only exist for MAX34440. 88 MAX34446 only supports curr[1-4]. 89 90power[1,3]_label "pout[1,3]" 91power[1,3]_input Measured power. 92power[1,3]_average Historical average power. 93power[1,3]_highest Historical maximum power. 94 95 Power attributes only exist for MAX34446. 96 97temp[1-8]_input Measured temperatures. From READ_TEMPERATURE_1 register. 98 temp1 is the chip's internal temperature. temp2..temp5 99 are remote I2C temperature sensors. For MAX34441, temp6 100 is a remote thermal-diode sensor. For MAX34440, temp6..8 101 are remote I2C temperature sensors. 102temp[1-8]_max Maximum temperature. From OT_WARN_LIMIT register. 103temp[1-8]_crit Critical high temperature. From OT_FAULT_LIMIT register. 104temp[1-8]_max_alarm Temperature high alarm. 105temp[1-8]_crit_alarm Temperature critical high alarm. 106temp[1-8]_average Historical average temperature (MAX34446 only). 107temp[1-8]_highest Historical maximum temperature. 108temp[1-8]_reset_history Write any value to reset history. 109 110 temp7 and temp8 attributes only exist for MAX34440. 111 MAX34446 only supports temp[1-3]. 112