How to gate an internal i.MX6 clock to a GPIO pin ?

[mihaitaivascu]

Hello,

     I'm working on a board equipped with a i.MX6 Solo/Duallite processor and was reguested to export a clock on a GPIO pin so it can be used by another board. I have looked into

the i.MX6 Solo/Duallite reference manual and found this  at GPIO clocks sub-chapter:

ipg_clk_s  Peripheral access clock

Can i use this clock source for external usage and if so how should proceed further? If this is not a good choice what clock should I use to "export" it on a GPIO pin ?

Thanks in advance,

            Mihaita Ivascu

[mihaitaivascu]

Hello guys,

   Thank you for your answers. I use barebox bootloader and a imx6q BSP. I suppose the DCD entry is equivalent to devicetree(.dtsi) entry for GPIO3 IOMUX.

   Also, i don't know where should I set  in the kernel tree:

IOMUXC_SW_MUX_CTL_PAD_GPIO03

IOMUXC_SW_PAD_CTL_PAD_GPIO03

Thank you again,

        Mihaita

[BiyongSUN]

Mihaita,

You need to set the IOMUX to route the clock out.

And you write the Device Configuration Data (DCD) in the uboot. 

[igorpadykov]

Hi Mihaita

clocks can be outputted on pins CLKO1,2 please check

sect.18.6.21 CCM Clock Output Source Register (CCM_CCOSR)

IMX6DQRM

Best regards

igor

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