Hello Developers,
Currently I am working on an embedded project using Tegra Jetson Tk1 board. The Linux Kernel version is 4.7 and the u-boot version is v2016.05. I am building a customised Linux kernel and u-boot to have the fastest boot time possible.
During Kernel startup I am seeing some error messages related to CPU clock frequencies like,
[ 0.000000] Tegra clk 127: register failed with -17
[ 4.275805] cpufreq: cpufreq_online: CPU0: Running at unlisted freq: 696000 KHz [ 4.275845] cpufreq: cpufreq_online: CPU0: Unlisted initial frequency changed to: 714000 KHz
On seeing the bootchart I have a feeling that the cpu clock frequency might be low - as lot of drivers are taking more time than usual, so I now wish to know what frequency does the cpu cores are running on during boot time. I am not clear on who is responsible(u-boot/kernel) for setting up the cpu clock frequency during the boot time.
In u-boot which modules do I need to look to get information about cpu frequency being set.
Thanks & Regards, Vinothkumar