$ pwd /sys/devices/pci0000:00/0000:00:15.1/i2c_designware.1/i2c-2/i2c-DLL0798:00/power
$ sudo ls -l total 0 -rw-r--r-- 1 root root 4096 May 24 19:13 async -rw-r--r-- 1 root root 4096 May 24 19:13 autosuspend_delay_ms -rw-r--r-- 1 root root 4096 May 24 19:13 control -r--r--r-- 1 root root 4096 May 24 19:13 runtime_active_kids -r--r--r-- 1 root root 4096 May 24 19:13 runtime_active_time -r--r--r-- 1 root root 4096 May 24 19:13 runtime_enabled -r--r--r-- 1 root root 4096 May 24 19:13 runtime_status -r--r--r-- 1 root root 4096 May 24 19:13 runtime_suspended_time -r--r--r-- 1 root root 4096 May 24 19:13 runtime_usage
$ pwd pci0000: 00/0000: 00:15.1/ i2c_designware. 1/i2c-2/ i2c-DLL0798: 00/power
/sys/devices/
$ sudo ls -l delay_ms suspended_ time
total 0
-rw-r--r-- 1 root root 4096 May 24 19:13 async
-rw-r--r-- 1 root root 4096 May 24 19:13 autosuspend_
-rw-r--r-- 1 root root 4096 May 24 19:13 control
-r--r--r-- 1 root root 4096 May 24 19:13 runtime_active_kids
-r--r--r-- 1 root root 4096 May 24 19:13 runtime_active_time
-r--r--r-- 1 root root 4096 May 24 19:13 runtime_enabled
-r--r--r-- 1 root root 4096 May 24 19:13 runtime_status
-r--r--r-- 1 root root 4096 May 24 19:13 runtime_
-r--r--r-- 1 root root 4096 May 24 19:13 runtime_usage