Not worked Camera MCLK in Xavier NX


I want to use 37.125 Mhz clock for working CSI Camera.

So, I added below code in device driver code.


And when I checking MCLK with oscilloscope, I could see clock, but it was not 37.125Mhz. It was about 8Mhz ~ 10Mhz and unstable.

How can I get clock with 37.125Mhz?

Thank you.

Fist this clock can’t generated 37.125 but 37.090909
Do you check the by below command after your code?

sudo cat /sys/kernel/debug/bpmp/debug/clk/extperiph1/rate

When I run “sudo cat /sys/kernel/debug/bpmp/debug/clk/extperiph1/rate”,
I saw value “37090909”.

And I also checked that oscilloscope is represented 37Mhz. I guess I measured oscilloscope with wrong way.

After, I’ll trying for working CSI Camera.

Thank you.

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