jtlee
1
Hello
I want to use 37.125 Mhz clock for working CSI Camera.
So, I added below code in device driver code.
devm_clk_get(dev,“extperiph1”);
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
jtlee
4
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.
system
Closed
6
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