topic Re: How to output CCM_CLKO1 and CCM_CLKO2 for different frequency in i.MX Processors

How to output CCM_CLKO1 and CCM_CLKO2 for different frequency

cilymo — Fri, 01 Sep 2017 07:23:19 GMT

Hi,

How to output CCM_CLKO1 and CCM_CLKO2 for different frequency， such as GPIO_3 for CCM_CLKO2 output 24M, GPIO_0 for CCM_CLKO1 output 32.768K ?

And how to output CCM_CLKO1 for different frequency from different PAD? such a GPIO_0 and GPIO_19.

My platform is imx6dl and BSP version is 4.1.15-2.0.1, hope to get help from your guys.

Re: How to output CCM_CLKO1 and CCM_CLKO2 for different frequency

igorpadykov — Fri, 01 Sep 2017 10:58:20 GMT

Hi cily

for clko clock generation please look at clk-imx6q.c

linux-imx.git - i.MX Linux Kernel

and dts file imx6qdl-sabresd.dtsi, check for record

MX6QDL_PAD_GPIO_0__CCM_CLKO1

linux-imx.git - i.MX Linux Kernel

Best regards
igor
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Re: How to output CCM_CLKO1 and CCM_CLKO2 for different frequency

cilymo — Fri, 01 Sep 2017 11:31:33 GMT

Hi Igorpadykov:

Thank your very much.

But my problem is not the clock output for CCM_CLKO1. I want to know if have any method to configure CCM_CLKO1 and CCM_CLKO2 output but with different frequency.

I configured

MX6QDL_PAD_GPIO_0__CCM_CLKO1

MX6QDL_PAD_GPIO_3__CCM_CLKO2

and i want GPIO_0 for 24M, GPIO_3 for 12M both output. I tried many different configuration, but GPIO_0 and GPIO_3 still output the same clock.

Thanks,

Cily

Re: How to output CCM_CLKO1 and CCM_CLKO2 for different frequency

umit_kayacik — Wed, 16 Oct 2019 12:19:57 GMT

Did you find a solution for GPIO_0 for clock out? Currently there is no clock on this pin even

"MX6QDL_PAD_GPIO_0__CCM_CLKO1 0x130b0" is declared in DTSI.