Compiling Persee kernel and flashing it on the Persee

Hi,
Thank you all, this has been really helpfull.
I just noticed something weird about my “new” patched kernel. It’s really slower, and it looks that the module cpufreq is missing:

On the original kernel (installed with Orbbec image), lshw -c cpu gives me:
*-cpu:0
physical id: 1
bus info: cpu@0
size: 600MHz
capacity: 1800MHz
capabilities: swp half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 evtstrm cpufreq

But on the patched one (using make ARCH=arm CROSS_COMPILE=/usr/bin/arm-linux-gnueabihf- persee-rk3288_defconfig)
It gives me:
root@ORBPER-01-5B-37:~# lshw -c cpu
*-cpu:0
physical id: 1
bus info: cpu@0
capabilities: swp half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 evtstrm

Do somebody noticed the same thing ?