$ ls -lad /sys/devices/platform/opal-sensor/hwmon/*/power* drwxr-xr-x 2 root root 0 May 23 10:16 /sys/devices/platform/opal-sensor/hwmon/hwmon4/power -r--r--r-- 1 root root 65536 May 23 10:16 /sys/devices/platform/opal-sensor/hwmon/hwmon4/power1_input $ cat /sys/devices/platform/opal-sensor/hwmon/hwmon4/power1_input 566000000 There patches allow any /sys/devices/platform/opal-sensor/hwmon/hwmon*/power* file to be detected as a measurement sysfs entry excluding directories.