1Kernel driver max34440 2====================== 3 4Supported chips: 5 6 * ADI ADPM12160 7 8 Prefixes: 'adpm12160' 9 10 Addresses scanned: - 11 12 Datasheet: - 13 14 * ADI ADPM12200 15 16 Prefixes: 'adpm12200' 17 18 Addresses scanned: - 19 20 Datasheet: - 21 22 * ADI ADPM12250 23 24 Prefixes: 'adpm12250' 25 26 Addresses scanned: - 27 28 Datasheet: - 29 30 * Maxim MAX34440 31 32 Prefixes: 'max34440' 33 34 Addresses scanned: - 35 36 Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/max34440.pdf 37 38 * Maxim MAX34441 39 40 PMBus 5-Channel Power-Supply Manager and Intelligent Fan Controller 41 42 Prefixes: 'max34441' 43 44 Addresses scanned: - 45 46 Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/max34441.pdf 47 48 * Maxim MAX34446 49 50 PMBus Power-Supply Data Logger 51 52 Prefixes: 'max34446' 53 54 Addresses scanned: - 55 56 Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/max34446.pdf 57 58 * Maxim MAX34451 59 60 PMBus 16-Channel V/I Monitor and 12-Channel Sequencer/Marginer 61 62 Prefixes: 'max34451' 63 64 Addresses scanned: - 65 66 Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/max34451.pdf 67 68 * Maxim MAX34460 69 70 PMBus 12-Channel Voltage Monitor & Sequencer 71 72 Prefix: 'max34460' 73 74 Addresses scanned: - 75 76 Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/max34460.pdf 77 78 * Maxim MAX34461 79 80 PMBus 16-Channel Voltage Monitor & Sequencer 81 82 Prefix: 'max34461' 83 84 Addresses scanned: - 85 86 Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/max34461.pdf 87 88Author: Guenter Roeck <linux@roeck-us.net> 89 90 91Description 92----------- 93 94This driver supports multiple devices: hardware monitoring for Maxim MAX34440 95PMBus 6-Channel Power-Supply Manager, MAX34441 PMBus 5-Channel Power-Supply 96Manager and Intelligent Fan Controller, and MAX34446 PMBus Power-Supply Data 97Logger; PMBus Voltage Monitor and Sequencers for MAX34451, MAX34460, and 98MAX34461; PMBus DC/DC Power Module ADPM12160, ADPM12200, and ADPM12250. The 99MAX34451 supports monitoring voltage or current of 12 channels based on GIN 100pins. The MAX34460 supports 12 voltage channels, and the MAX34461 supports 16 101voltage channels. The ADPM12160, ADPM12200, and ADPM12250 also monitors both 102input and output of voltage and current. 103 104The driver is a client driver to the core PMBus driver. Please see 105Documentation/hwmon/pmbus.rst for details on PMBus client drivers. 106 107 108Usage Notes 109----------- 110 111This driver does not auto-detect devices. You will have to instantiate the 112devices explicitly. Please see Documentation/i2c/instantiating-devices.rst for 113details. 114 115For MAX34446, the value of the currX_crit attribute determines if current or 116voltage measurement is enabled for a given channel. Voltage measurement is 117enabled if currX_crit is set to 0; current measurement is enabled if the 118attribute is set to a positive value. Power measurement is only enabled if 119channel 1 (3) is configured for voltage measurement, and channel 2 (4) is 120configured for current measurement. 121 122 123Platform data support 124--------------------- 125 126The driver supports standard PMBus driver platform data. 127 128 129Sysfs entries 130------------- 131 132The following attributes are supported. Limits are read-write; all other 133attributes are read-only. 134 135In 136~~ 137 138======================= ======================================================= 139in[1-6]_label "vout[1-6]". 140in[1-6]_input Measured voltage. From READ_VOUT register. 141in[1-6]_min Minimum Voltage. From VOUT_UV_WARN_LIMIT register. 142in[1-6]_max Maximum voltage. From VOUT_OV_WARN_LIMIT register. 143in[1-6]_lcrit Critical minimum Voltage. VOUT_UV_FAULT_LIMIT register. 144in[1-6]_crit Critical maximum voltage. From VOUT_OV_FAULT_LIMIT 145 register. 146in[1-6]_min_alarm Voltage low alarm. From VOLTAGE_UV_WARNING status. 147in[1-6]_max_alarm Voltage high alarm. From VOLTAGE_OV_WARNING status. 148in[1-6]_lcrit_alarm Voltage critical low alarm. From VOLTAGE_UV_FAULT 149 status. 150in[1-6]_crit_alarm Voltage critical high alarm. From VOLTAGE_OV_FAULT 151 status. 152in[1-6]_lowest Historical minimum voltage. 153in[1-6]_highest Historical maximum voltage. 154in[1-6]_reset_history Write any value to reset history. 155======================= ======================================================= 156 157.. note:: 158 159 - MAX34446 only supports in[1-4]. 160 - ADPM12160, ADPM12200, and ADPM12250 only supports in[1-2]. Label is "vin1" 161 and "vout1" respectively. 162 163Curr 164~~~~ 165 166======================= ======================================================== 167curr[1-6]_label "iout[1-6]". 168curr[1-6]_input Measured current. From READ_IOUT register. 169curr[1-6]_max Maximum current. From IOUT_OC_WARN_LIMIT register. 170curr[1-6]_crit Critical maximum current. From IOUT_OC_FAULT_LIMIT 171 register. 172curr[1-6]_max_alarm Current high alarm. From IOUT_OC_WARNING status. 173curr[1-6]_crit_alarm Current critical high alarm. From IOUT_OC_FAULT status. 174curr[1-4]_average Historical average current (MAX34446/34451 only). 175curr[1-6]_highest Historical maximum current. 176curr[1-6]_reset_history Write any value to reset history. 177======================= ======================================================== 178 179.. note:: 180 181 - in6 and curr6 attributes only exist for MAX34440. 182 - MAX34446 only supports curr[1-4]. 183 - For ADPM12160, ADPM12200, and ADPM12250, curr[1] is "iin1" 184 - For ADPM12160, and ADPM12200 curr[2-6] are "iout[1-5]". 185 - For ADPM12250, curr[2-4] are "iout[1-3]". 186 187Power 188~~~~~ 189 190======================= ======================================================== 191power[1,3]_label "pout[1,3]" 192power[1,3]_input Measured power. 193power[1,3]_average Historical average power. 194power[1,3]_highest Historical maximum power. 195======================= ======================================================== 196 197.. note:: Power attributes only exist for MAX34446. 198 199Temp 200~~~~ 201 202======================= ======================================================== 203temp[1-8]_input Measured temperatures. From READ_TEMPERATURE_1 register. 204 temp1 is the chip's internal temperature. temp2..temp5 205 are remote I2C temperature sensors. For MAX34441, temp6 206 is a remote thermal-diode sensor. For MAX34440, temp6..8 207 are remote I2C temperature sensors. 208temp[1-8]_max Maximum temperature. From OT_WARN_LIMIT register. 209temp[1-8]_crit Critical high temperature. From OT_FAULT_LIMIT register. 210temp[1-8]_max_alarm Temperature high alarm. 211temp[1-8]_crit_alarm Temperature critical high alarm. 212temp[1-8]_average Historical average temperature (MAX34446 only). 213temp[1-8]_highest Historical maximum temperature. 214temp[1-8]_reset_history Write any value to reset history. 215======================= ======================================================== 216 217 218.. note:: 219 - temp7 and temp8 attributes only exist for MAX34440. 220 - MAX34446 only supports temp[1-3]. 221 - ADPM12160, ADPM12200, and ADPM12250 only supports temp[1]. 222 223 224.. note:: 225 226 - MAX34451 supports attribute groups in[1-16] (or curr[1-16] based on 227 input pins) and temp[1-5]. 228 - MAX34460 supports attribute groups in[1-12] and temp[1-5]. 229 - MAX34461 supports attribute groups in[1-16] and temp[1-5]. 230