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RenesasLm
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Registered: ‎05-21-2020

ZCU102 setting SI5328 frequency from FSBL

Hi guys

I need to set SI5328 to 156.25 MHz to provide mgt_clk to one of my AXI ethernet subsystems. I have tested it by SCUI and it worked.

The problem is, the change is lost across reset system. 

I tried modifying system-user.dtsi like below but it didn't seem to work since I am getting "xilinx_axienet a0080000.ethernet: of_phy_connect() failed", which means the clock is not there. I have to explicitly set it through SCUI to make it work.

&si5328 {
compatible = "silabs,si5328";
reg = <0x69>;
factory-fout = <156250000>;
clock-frequency = <156250000>;
clock-output-names = "si5328";
}; 

 

So I am wondering how to make it permanent through SW, or maybe FSBL?

 

Thanks a lot.

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