| frequency | notation on boot.ini | clock spec. |
| 1.824 GHz | “1824” | overclock |
| 1.728 GHz | “1728” | overclock |
| 1.632 GHz | “1632” | overclock |
| 1.536 GHz | “1536” | spec in |
| 1.488 GHz | “1488” | spec in |
| … | … | … |
You can check the available frequency set with the following node.
# cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequency 96000 192000 312000 408000 504000 600000 696000 816000 912000 1008000 1104000 1200000 1296000 1416000 1488000 1536000 1632000 1728000 1824000
In case of Android, we don't recommend 1.824GHz cpu frequency on Android system so far
because system booting and heavy load test with 1.824GHz is unstable currently.
Please modify max_freq based on the aforementioned frequency table. The unit of max_freq in boot.ini in MHz.
### boot.ini
# CPU Max Frequency
# Possible Values: 96 192 312 408 504 600 720 816
# 1008 1200 1320 1488 1536 1632 1728 and 1824
# setenv max_freq "1488"
# setenv max_freq "1536"
# setenv max_freq "1632"
# setenv max_freq "1728"
# setenv max_freq "1824"
setenv max_freq "1536"
# Boot Arguments
setenv bootargs "root=UUID=e139ce78-9841-40fe-8823-96a304a09859 rootwait ro ${condev} no_console_suspend vdaccfg=0xa000 logo=osd1,loaded,0x7900000,720p,full dmfc=3
cvbsmode=576cvbs hdmimode=${m} m_bpp=${m_bpp} vout=${vout_mode} ${disableuhs} ${hdmi_hpd} ${hdmi_cec} ${enabledac} monitor_onoff=${monitor_onoff} max_freq=${max_freq}"
You can check if the current max cpu frequency via the below node.
# cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq 1824000
The node cpuinfo_cur_freq shows the cpu frequency that is currently working.
Please note governor policy should be performance if you want to check the max cpu frequency and run max cpu frequency unconditionally.
# echo performance > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor # cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor performance # cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq 1824000