132377bd2SShilpasri G BhatWhat: /sys/firmware/opal/sensor_groups 232377bd2SShilpasri G BhatDate: August 2017 3*fae57306SStephen RothwellContact: Linux for PowerPC mailing list <linuxppc-dev@lists.ozlabs.org> 432377bd2SShilpasri G BhatDescription: Sensor groups directory for POWER9 powernv servers 532377bd2SShilpasri G Bhat 632377bd2SShilpasri G Bhat Each folder in this directory contains a sensor group 732377bd2SShilpasri G Bhat which are classified based on type of the sensor 832377bd2SShilpasri G Bhat like power, temperature, frequency, current, etc. They 932377bd2SShilpasri G Bhat can also indicate the group of sensors belonging to 1032377bd2SShilpasri G Bhat different owners like CSM, Profiler, Job-Scheduler 1132377bd2SShilpasri G Bhat 1232377bd2SShilpasri G BhatWhat: /sys/firmware/opal/sensor_groups/<sensor_group_name>/clear 1332377bd2SShilpasri G BhatDate: August 2017 14*fae57306SStephen RothwellContact: Linux for PowerPC mailing list <linuxppc-dev@lists.ozlabs.org> 1532377bd2SShilpasri G BhatDescription: Sysfs file to clear the min-max of all the sensors 1632377bd2SShilpasri G Bhat belonging to the group. 1732377bd2SShilpasri G Bhat 1832377bd2SShilpasri G Bhat Writing 1 to this file will clear the minimum and 1932377bd2SShilpasri G Bhat maximum values of all the sensors in the group. 2032377bd2SShilpasri G Bhat In POWER9, the min-max of a sensor is the historical minimum 2132377bd2SShilpasri G Bhat and maximum value of the sensor cached by OCC. 22