1Kernel driver max34440 2====================== 3 4Supported chips: 5 * Maxim MAX34440 6 Prefixes: 'max34440' 7 Addresses scanned: - 8 Datasheet: http://datasheets.maximintegrated.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.maximintegrated.com/en/ds/MAX34441.pdf 14 * Maxim MAX34446 15 PMBus Power-Supply Data Logger 16 Prefixes: 'max34446' 17 Addresses scanned: - 18 Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX34446.pdf 19 * Maxim MAX34451 20 PMBus 16-Channel V/I Monitor and 12-Channel Sequencer/Marginer 21 Prefixes: 'max34451' 22 Addresses scanned: - 23 Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX34451.pdf 24 * Maxim MAX34460 25 PMBus 12-Channel Voltage Monitor & Sequencer 26 Prefix: 'max34460' 27 Addresses scanned: - 28 Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX34460.pdf 29 * Maxim MAX34461 30 PMBus 16-Channel Voltage Monitor & Sequencer 31 Prefix: 'max34461' 32 Addresses scanned: - 33 Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX34461.pdf 34 35Author: Guenter Roeck <linux@roeck-us.net> 36 37 38Description 39----------- 40 41This driver supports hardware monitoring for Maxim MAX34440 PMBus 6-Channel 42Power-Supply Manager, MAX34441 PMBus 5-Channel Power-Supply Manager 43and Intelligent Fan Controller, and MAX34446 PMBus Power-Supply Data Logger. 44It also supports the MAX34451, MAX34460, and MAX34461 PMBus Voltage Monitor & 45Sequencers. The MAX34451 supports monitoring voltage or current of 12 channels 46based on GIN pins. The MAX34460 supports 12 voltage channels, and the MAX34461 47supports 16 voltage channels. 48 49The driver is a client driver to the core PMBus driver. Please see 50Documentation/hwmon/pmbus for details on PMBus client drivers. 51 52 53Usage Notes 54----------- 55 56This driver does not auto-detect devices. You will have to instantiate the 57devices explicitly. Please see Documentation/i2c/instantiating-devices for 58details. 59 60For MAX34446, the value of the currX_crit attribute determines if current or 61voltage measurement is enabled for a given channel. Voltage measurement is 62enabled if currX_crit is set to 0; current measurement is enabled if the 63attribute is set to a positive value. Power measurement is only enabled if 64channel 1 (3) is configured for voltage measurement, and channel 2 (4) is 65configured for current measurement. 66 67 68Platform data support 69--------------------- 70 71The driver supports standard PMBus driver platform data. 72 73 74Sysfs entries 75------------- 76 77The following attributes are supported. Limits are read-write; all other 78attributes are read-only. 79 80in[1-6]_label "vout[1-6]". 81in[1-6]_input Measured voltage. From READ_VOUT register. 82in[1-6]_min Minimum Voltage. From VOUT_UV_WARN_LIMIT register. 83in[1-6]_max Maximum voltage. From VOUT_OV_WARN_LIMIT register. 84in[1-6]_lcrit Critical minimum Voltage. VOUT_UV_FAULT_LIMIT register. 85in[1-6]_crit Critical maximum voltage. From VOUT_OV_FAULT_LIMIT register. 86in[1-6]_min_alarm Voltage low alarm. From VOLTAGE_UV_WARNING status. 87in[1-6]_max_alarm Voltage high alarm. From VOLTAGE_OV_WARNING status. 88in[1-6]_lcrit_alarm Voltage critical low alarm. From VOLTAGE_UV_FAULT status. 89in[1-6]_crit_alarm Voltage critical high alarm. From VOLTAGE_OV_FAULT status. 90in[1-6]_lowest Historical minimum voltage. 91in[1-6]_highest Historical maximum voltage. 92in[1-6]_reset_history Write any value to reset history. 93 94 MAX34446 only supports in[1-4]. 95 96curr[1-6]_label "iout[1-6]". 97curr[1-6]_input Measured current. From READ_IOUT register. 98curr[1-6]_max Maximum current. From IOUT_OC_WARN_LIMIT register. 99curr[1-6]_crit Critical maximum current. From IOUT_OC_FAULT_LIMIT register. 100curr[1-6]_max_alarm Current high alarm. From IOUT_OC_WARNING status. 101curr[1-6]_crit_alarm Current critical high alarm. From IOUT_OC_FAULT status. 102curr[1-4]_average Historical average current (MAX34446/34451 only). 103curr[1-6]_highest Historical maximum current. 104curr[1-6]_reset_history Write any value to reset history. 105 106 in6 and curr6 attributes only exist for MAX34440. 107 MAX34446 only supports curr[1-4]. 108 109power[1,3]_label "pout[1,3]" 110power[1,3]_input Measured power. 111power[1,3]_average Historical average power. 112power[1,3]_highest Historical maximum power. 113 114 Power attributes only exist for MAX34446. 115 116temp[1-8]_input Measured temperatures. From READ_TEMPERATURE_1 register. 117 temp1 is the chip's internal temperature. temp2..temp5 118 are remote I2C temperature sensors. For MAX34441, temp6 119 is a remote thermal-diode sensor. For MAX34440, temp6..8 120 are remote I2C temperature sensors. 121temp[1-8]_max Maximum temperature. From OT_WARN_LIMIT register. 122temp[1-8]_crit Critical high temperature. From OT_FAULT_LIMIT register. 123temp[1-8]_max_alarm Temperature high alarm. 124temp[1-8]_crit_alarm Temperature critical high alarm. 125temp[1-8]_average Historical average temperature (MAX34446 only). 126temp[1-8]_highest Historical maximum temperature. 127temp[1-8]_reset_history Write any value to reset history. 128 129 temp7 and temp8 attributes only exist for MAX34440. 130 MAX34446 only supports temp[1-3]. 131 132MAX34451 supports attribute groups in[1-16] (or curr[1-16] based on input pins) 133and temp[1-5]. 134MAX34460 supports attribute groups in[1-12] and temp[1-5]. 135MAX34461 supports attribute groups in[1-16] and temp[1-5]. 136
