ls_output

~ $ ls -lR /sys/devices/platform/ideapad_acpi
ls: cannot access '/sys/devices/platform/ideapad_acpi': No such file or directory

~ $ ls /sys/devices/platform/
ACPI0003:00/       efi-framebuffer.0/ intel_rapl_msr.0/  MSFT0101:00/       PNP0C0D:00/        PNP0C14:02/        regulatory.0/      snd-soc-dummy/     USBC000:00/
AMDI0010:03/       efivars.0/         LHK2019:00/        pcspkr/            PNP0C14:00/        power/             rtc-efi.0/         sp5100-tco/        vboxdrv.0/
AMDI0030:00/       i8042/             microcode/         PNP0C0C:00/        PNP0C14:01/        reg-dummy/         serial8250/        uevent

~ $ sudo find /sys -name ideapad_acpi
/sys/bus/platform/drivers/ideapad_acpi

~ $ ls -lR /sys/bus/platform/drivers/ideapad_acpi
/sys/bus/platform/drivers/ideapad_acpi:
total 0
--w------- 1 root root 4096 Mar 22 21:10 bind
lrwxrwxrwx 1 root root    0 Mar 22 21:11 module -> ../../../../module/ideapad_laptop
--w------- 1 root root 4096 Mar 22 21:08 uevent
--w------- 1 root root 4096 Mar 22 21:10 unbind
lrwxrwxrwx 1 root root    0 Mar 22 21:11 VPC2004:00 -> ../../../../devices/pci0000:00/0000:00:14.3/PNP0C09:00/VPC2004:00