How to check i.MX7D ARM frequency

[felixhsu]

Hi All

The i.MX7D have multiple power modes, how to check each power mode ARM frequency by Hardware or software, thanks.

[igorpadykov · Accepted solution]

Hi Felix

use the following command to view the current CPU frequency in KHz:
cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq
please check Chapter 23 CPU Frequency Scaling (CPUFREQ) Driver attached Linux Manual
use register CCM_ANALOG_CLK_MISC0, field LVDS1_CLK_SEL, selects the clock to be routed to anaclk1/1b :
0x00 - Arm PLL;

Best regards
igor
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