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1Kernel driver max344402======================3 4Supported chips:5 6 * Maxim MAX344407 8 Prefixes: 'max34440'9 10 Addresses scanned: -11 12 Datasheet: https://datasheets.maximintegrated.com/en/ds/MAX34440.pdf13 14 * Maxim MAX3444115 16 PMBus 5-Channel Power-Supply Manager and Intelligent Fan Controller17 18 Prefixes: 'max34441'19 20 Addresses scanned: -21 22 Datasheet: https://datasheets.maximintegrated.com/en/ds/MAX34441.pdf23 24 * Maxim MAX3444625 26 PMBus Power-Supply Data Logger27 28 Prefixes: 'max34446'29 30 Addresses scanned: -31 32 Datasheet: https://datasheets.maximintegrated.com/en/ds/MAX34446.pdf33 34 * Maxim MAX3445135 36 PMBus 16-Channel V/I Monitor and 12-Channel Sequencer/Marginer37 38 Prefixes: 'max34451'39 40 Addresses scanned: -41 42 Datasheet: https://datasheets.maximintegrated.com/en/ds/MAX34451.pdf43 44 * Maxim MAX3446045 46 PMBus 12-Channel Voltage Monitor & Sequencer47 48 Prefix: 'max34460'49 50 Addresses scanned: -51 52 Datasheet: https://datasheets.maximintegrated.com/en/ds/MAX34460.pdf53 54 * Maxim MAX3446155 56 PMBus 16-Channel Voltage Monitor & Sequencer57 58 Prefix: 'max34461'59 60 Addresses scanned: -61 62 Datasheet: https://datasheets.maximintegrated.com/en/ds/MAX34461.pdf63 64Author: Guenter Roeck <linux@roeck-us.net>65 66 67Description68-----------69 70This driver supports hardware monitoring for Maxim MAX34440 PMBus 6-Channel71Power-Supply Manager, MAX34441 PMBus 5-Channel Power-Supply Manager72and Intelligent Fan Controller, and MAX34446 PMBus Power-Supply Data Logger.73It also supports the MAX34451, MAX34460, and MAX34461 PMBus Voltage Monitor &74Sequencers. The MAX34451 supports monitoring voltage or current of 12 channels75based on GIN pins. The MAX34460 supports 12 voltage channels, and the MAX3446176supports 16 voltage channels.77 78The driver is a client driver to the core PMBus driver. Please see79Documentation/hwmon/pmbus.rst for details on PMBus client drivers.80 81 82Usage Notes83-----------84 85This driver does not auto-detect devices. You will have to instantiate the86devices explicitly. Please see Documentation/i2c/instantiating-devices.rst for87details.88 89For MAX34446, the value of the currX_crit attribute determines if current or90voltage measurement is enabled for a given channel. Voltage measurement is91enabled if currX_crit is set to 0; current measurement is enabled if the92attribute is set to a positive value. Power measurement is only enabled if93channel 1 (3) is configured for voltage measurement, and channel 2 (4) is94configured for current measurement.95 96 97Platform data support98---------------------99 100The driver supports standard PMBus driver platform data.101 102 103Sysfs entries104-------------105 106The following attributes are supported. Limits are read-write; all other107attributes are read-only.108 109In110~~111 112======================= =======================================================113in[1-6]_label "vout[1-6]".114in[1-6]_input Measured voltage. From READ_VOUT register.115in[1-6]_min Minimum Voltage. From VOUT_UV_WARN_LIMIT register.116in[1-6]_max Maximum voltage. From VOUT_OV_WARN_LIMIT register.117in[1-6]_lcrit Critical minimum Voltage. VOUT_UV_FAULT_LIMIT register.118in[1-6]_crit Critical maximum voltage. From VOUT_OV_FAULT_LIMIT119 register.120in[1-6]_min_alarm Voltage low alarm. From VOLTAGE_UV_WARNING status.121in[1-6]_max_alarm Voltage high alarm. From VOLTAGE_OV_WARNING status.122in[1-6]_lcrit_alarm Voltage critical low alarm. From VOLTAGE_UV_FAULT123 status.124in[1-6]_crit_alarm Voltage critical high alarm. From VOLTAGE_OV_FAULT125 status.126in[1-6]_lowest Historical minimum voltage.127in[1-6]_highest Historical maximum voltage.128in[1-6]_reset_history Write any value to reset history.129======================= =======================================================130 131.. note:: MAX34446 only supports in[1-4].132 133Curr134~~~~135 136======================= ========================================================137curr[1-6]_label "iout[1-6]".138curr[1-6]_input Measured current. From READ_IOUT register.139curr[1-6]_max Maximum current. From IOUT_OC_WARN_LIMIT register.140curr[1-6]_crit Critical maximum current. From IOUT_OC_FAULT_LIMIT141 register.142curr[1-6]_max_alarm Current high alarm. From IOUT_OC_WARNING status.143curr[1-6]_crit_alarm Current critical high alarm. From IOUT_OC_FAULT status.144curr[1-4]_average Historical average current (MAX34446/34451 only).145curr[1-6]_highest Historical maximum current.146curr[1-6]_reset_history Write any value to reset history.147======================= ========================================================148 149.. note::150 151 - in6 and curr6 attributes only exist for MAX34440.152 - MAX34446 only supports curr[1-4].153 154Power155~~~~~156 157======================= ========================================================158power[1,3]_label "pout[1,3]"159power[1,3]_input Measured power.160power[1,3]_average Historical average power.161power[1,3]_highest Historical maximum power.162======================= ========================================================163 164.. note:: Power attributes only exist for MAX34446.165 166Temp167~~~~168 169======================= ========================================================170temp[1-8]_input Measured temperatures. From READ_TEMPERATURE_1 register.171 temp1 is the chip's internal temperature. temp2..temp5172 are remote I2C temperature sensors. For MAX34441, temp6173 is a remote thermal-diode sensor. For MAX34440, temp6..8174 are remote I2C temperature sensors.175temp[1-8]_max Maximum temperature. From OT_WARN_LIMIT register.176temp[1-8]_crit Critical high temperature. From OT_FAULT_LIMIT register.177temp[1-8]_max_alarm Temperature high alarm.178temp[1-8]_crit_alarm Temperature critical high alarm.179temp[1-8]_average Historical average temperature (MAX34446 only).180temp[1-8]_highest Historical maximum temperature.181temp[1-8]_reset_history Write any value to reset history.182======================= ========================================================183 184 185.. note::186 - temp7 and temp8 attributes only exist for MAX34440.187 - MAX34446 only supports temp[1-3].188 189 190.. note::191 192 - MAX34451 supports attribute groups in[1-16] (or curr[1-16] based on193 input pins) and temp[1-5].194 - MAX34460 supports attribute groups in[1-12] and temp[1-5].195 - MAX34461 supports attribute groups in[1-16] and temp[1-5].196