4.7.10. hrut_ddr_freq

hrut_ddr_freq is a tool used to obtain the current DDR (Double Data Rate) memory frequency. It retrieves frequency information by reading the following files from the Linux sysfs filesystem:

/sys/class/devfreq/soc\:ddrc-freq/name: confirms whether the device name is soc:ddrc-freq.
/sys/class/devfreq/soc\:ddrc-freq/cur_freq: reads the current DDR frequency in Hz.

4.7.10.1. Syntax Description

Below is the Usage output from executing hrut_ddr_freq -h:

hrut_ddr_freq -h

*** this tool is used to get current ddr frequency ***
 usage: hrut_ddr_freq

No input arguments are required; simply run the command to obtain the current DDR frequency.

4.7.10.2. Command Options and Their Functions

Default Usage

Command:

root@buildroot:~# hrut_ddr_freq

Function:

This command traverses the /sys/class/devfreq directory, looks for a matching device name (soc:ddrc-freq), and reads its current frequency.

Output:

root@buildroot:/userdata/gmsl_test# hrut_ddr_freq
ddr cur_freq: 4266000000