Hi Scott, I measured the power consumption of the whole system on the tqmp2020 ( http://tq-group.com/tqmp2020 ) with a QorIQ P2020.
Kernel: root@generic-powerpc-e500v2:/sys/power# uname -a Linux generic-powerpc-e500v2 3.7.0-rc8-00004-g6e93414 #4 SMP Tue Dec 11 08:53:23 CET 2012 ppc GNU/Linux root@generic-powerpc-e500v2:/sys/power# cat /etc/issue ELDK 5.2.1 \n \l In idle using doze I got: 545mA, 18V => 9.81W In idle using nap I got: 500mA, 18V => 9W That's a difference of 0.81W, 0.81W/9.81W = 0.083 (8.3 %) > The only way you'll get into sleep mode is through /sys/power/state. How can I use this interface? root@generic-powerpc-e500v2:/sys/power# ls -la total 0 drwxr-xr-x 2 root root 0 Feb 1 15:39 . dr-xr-xr-x 12 root root 0 Feb 1 15:19 .. -rw-r--r-- 1 root root 4096 Feb 1 15:39 state root@generic-powerpc-e500v2:/sys/power# cat state root@generic-powerpc-e500v2:/sys/power# echo "sleep" > state -sh: echo: write error: Function not implemented root@generic-powerpc-e500v2:/sys/power# echo 0 > state -sh: echo: write error: Function not implemented root@generic-powerpc-e500v2:/sys/power# Kind regards Thomas Waldecker _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
