4NT wakealarm / rtc

Hi,

how to wake up 4th gen non-touch Kindle?

Something I've tried:

[root@kindle root]# echo 0 > /sys/class/rtc/rtc0/wakealarm
-sh: cannot create /sys/class/rtc/rtc0/wakealarm: nonexistent directory

[root@kindle root]# cat /proc/driver/rtc
rtc_time : 20:58:58
rtc_date : 2016-12-25
alrm_time : 00:00:00
alrm_date : 1970-01-01
alarm_IRQ : no
alrm_pending : no
24hr : yes
alarm_IRQ : no
[root@kindle root]#