17ebd8b66SMauro Carvalho ChehabKernel driver max8688 27ebd8b66SMauro Carvalho Chehab===================== 37ebd8b66SMauro Carvalho Chehab 47ebd8b66SMauro Carvalho ChehabSupported chips: 57ebd8b66SMauro Carvalho Chehab 67ebd8b66SMauro Carvalho Chehab * Maxim MAX8688 77ebd8b66SMauro Carvalho Chehab 87ebd8b66SMauro Carvalho Chehab Prefix: 'max8688' 97ebd8b66SMauro Carvalho Chehab 107ebd8b66SMauro Carvalho Chehab Addresses scanned: - 117ebd8b66SMauro Carvalho Chehab 127ebd8b66SMauro Carvalho Chehab Datasheet: http://datasheets.maxim-ic.com/en/ds/MAX8688.pdf 137ebd8b66SMauro Carvalho Chehab 147ebd8b66SMauro Carvalho ChehabAuthor: Guenter Roeck <linux@roeck-us.net> 157ebd8b66SMauro Carvalho Chehab 167ebd8b66SMauro Carvalho Chehab 177ebd8b66SMauro Carvalho ChehabDescription 187ebd8b66SMauro Carvalho Chehab----------- 197ebd8b66SMauro Carvalho Chehab 207ebd8b66SMauro Carvalho ChehabThis driver supports hardware monitoring for Maxim MAX8688 Digital Power-Supply 217ebd8b66SMauro Carvalho ChehabController/Monitor with PMBus Interface. 227ebd8b66SMauro Carvalho Chehab 237ebd8b66SMauro Carvalho ChehabThe driver is a client driver to the core PMBus driver. Please see 247ebd8b66SMauro Carvalho ChehabDocumentation/hwmon/pmbus.rst for details on PMBus client drivers. 257ebd8b66SMauro Carvalho Chehab 267ebd8b66SMauro Carvalho Chehab 277ebd8b66SMauro Carvalho ChehabUsage Notes 287ebd8b66SMauro Carvalho Chehab----------- 297ebd8b66SMauro Carvalho Chehab 307ebd8b66SMauro Carvalho ChehabThis driver does not auto-detect devices. You will have to instantiate the 31*ccf988b6SMauro Carvalho Chehabdevices explicitly. Please see Documentation/i2c/instantiating-devices.rst for 327ebd8b66SMauro Carvalho Chehabdetails. 337ebd8b66SMauro Carvalho Chehab 347ebd8b66SMauro Carvalho Chehab 357ebd8b66SMauro Carvalho ChehabPlatform data support 367ebd8b66SMauro Carvalho Chehab--------------------- 377ebd8b66SMauro Carvalho Chehab 387ebd8b66SMauro Carvalho ChehabThe driver supports standard PMBus driver platform data. 397ebd8b66SMauro Carvalho Chehab 407ebd8b66SMauro Carvalho Chehab 417ebd8b66SMauro Carvalho ChehabSysfs entries 427ebd8b66SMauro Carvalho Chehab------------- 437ebd8b66SMauro Carvalho Chehab 447ebd8b66SMauro Carvalho ChehabThe following attributes are supported. Limits are read-write; all other 457ebd8b66SMauro Carvalho Chehabattributes are read-only. 467ebd8b66SMauro Carvalho Chehab 477ebd8b66SMauro Carvalho Chehab======================= ======================================================== 487ebd8b66SMauro Carvalho Chehabin1_label "vout1" 497ebd8b66SMauro Carvalho Chehabin1_input Measured voltage. From READ_VOUT register. 507ebd8b66SMauro Carvalho Chehabin1_min Minimum Voltage. From VOUT_UV_WARN_LIMIT register. 517ebd8b66SMauro Carvalho Chehabin1_max Maximum voltage. From VOUT_OV_WARN_LIMIT register. 527ebd8b66SMauro Carvalho Chehabin1_lcrit Critical minimum Voltage. VOUT_UV_FAULT_LIMIT register. 537ebd8b66SMauro Carvalho Chehabin1_crit Critical maximum voltage. From VOUT_OV_FAULT_LIMIT 547ebd8b66SMauro Carvalho Chehab register. 557ebd8b66SMauro Carvalho Chehabin1_min_alarm Voltage low alarm. From VOLTAGE_UV_WARNING status. 567ebd8b66SMauro Carvalho Chehabin1_max_alarm Voltage high alarm. From VOLTAGE_OV_WARNING status. 577ebd8b66SMauro Carvalho Chehabin1_lcrit_alarm Voltage critical low alarm. From VOLTAGE_UV_FAULT 587ebd8b66SMauro Carvalho Chehab status. 597ebd8b66SMauro Carvalho Chehabin1_crit_alarm Voltage critical high alarm. From VOLTAGE_OV_FAULT 607ebd8b66SMauro Carvalho Chehab status. 617ebd8b66SMauro Carvalho Chehabin1_highest Historical maximum voltage. 627ebd8b66SMauro Carvalho Chehabin1_reset_history Write any value to reset history. 637ebd8b66SMauro Carvalho Chehab 647ebd8b66SMauro Carvalho Chehabcurr1_label "iout1" 657ebd8b66SMauro Carvalho Chehabcurr1_input Measured current. From READ_IOUT register. 667ebd8b66SMauro Carvalho Chehabcurr1_max Maximum current. From IOUT_OC_WARN_LIMIT register. 677ebd8b66SMauro Carvalho Chehabcurr1_crit Critical maximum current. From IOUT_OC_FAULT_LIMIT 687ebd8b66SMauro Carvalho Chehab register. 697ebd8b66SMauro Carvalho Chehabcurr1_max_alarm Current high alarm. From IOUT_OC_WARN_LIMIT register. 707ebd8b66SMauro Carvalho Chehabcurr1_crit_alarm Current critical high alarm. From IOUT_OC_FAULT status. 717ebd8b66SMauro Carvalho Chehabcurr1_highest Historical maximum current. 727ebd8b66SMauro Carvalho Chehabcurr1_reset_history Write any value to reset history. 737ebd8b66SMauro Carvalho Chehab 747ebd8b66SMauro Carvalho Chehabtemp1_input Measured temperature. From READ_TEMPERATURE_1 register. 757ebd8b66SMauro Carvalho Chehabtemp1_max Maximum temperature. From OT_WARN_LIMIT register. 767ebd8b66SMauro Carvalho Chehabtemp1_crit Critical high temperature. From OT_FAULT_LIMIT register. 777ebd8b66SMauro Carvalho Chehabtemp1_max_alarm Chip temperature high alarm. Set by comparing 787ebd8b66SMauro Carvalho Chehab READ_TEMPERATURE_1 with OT_WARN_LIMIT if TEMP_OT_WARNING 797ebd8b66SMauro Carvalho Chehab status is set. 807ebd8b66SMauro Carvalho Chehabtemp1_crit_alarm Chip temperature critical high alarm. Set by comparing 817ebd8b66SMauro Carvalho Chehab READ_TEMPERATURE_1 with OT_FAULT_LIMIT if TEMP_OT_FAULT 827ebd8b66SMauro Carvalho Chehab status is set. 837ebd8b66SMauro Carvalho Chehabtemp1_highest Historical maximum temperature. 847ebd8b66SMauro Carvalho Chehabtemp1_reset_history Write any value to reset history. 857ebd8b66SMauro Carvalho Chehab======================= ======================================================== 86