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How to know the speed of i2c?

Question asked by Lin Hsun on Feb 22, 2018
Latest reply on Feb 22, 2018 by igorpadykov

Dear all

 

My board is sabresd. I have some questions about i2c speed.

 

The dtsi sets  clock-frequency is 100k, but the result from cat /d/clk/clk_summary is 66000000.

 

Could  you tell me how speed i2c is?

 

My dtsi is as follows:

&i2c1 {
   clock-frequency = <100000>;
   pinctrl-names = "default";
   pinctrl-0 = <&pinctrl_i2c1>;

 

 

cat /d/clk/clk_summary is as follows:

sabresd_6dq:/ # cat /d/clk/clk_summary | grep i2c
i2c3 0 0 66000000 0 0
i2c2 0 0 66000000 0 0
i2c1 0 0 66000000 0 0

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