iMX6DL : How to reset the PCIe core ?

koichisakagami — Tue, 17 May 2016 09:53:56 GMT

Dear community,
I use i.MX6DL PCIe module as a RootComplex.

After bringing up the PCIe link connected to an endpoint device,
I want to reset the PCIe core in order to re-bringing up .

I hope to use the "core_rst_n" signal to reset the PCIe core.
It is described in Figure 49-9. I/O Interfaces involved in Initialization (IMX6SDLRM)

[Question]
What kind of registers do I need to set up in order to assert "core_rst_n" signal ?

Best Regards,
Koichi Sakagami

Re: iMX6DL : How to reset the PCIe core ?

Yuri — Wed, 18 May 2016 05:35:20 GMT

Hello,

The "core_rst_n" is internal signal, that may be activated by i.MX6 System Reset Controller (SoC resets).

You may look at Chapter 60 [System Reset Controller (SRC)] of the i.MX6 S/DL RM for more details.

As we can see, there is no separate reset option for the PCIe.

For PCIe Link establishment You may use bit APP_LTSSM_ENABLE and APP_INIT_RST bits

of IOMUXC_GPR12 register.

Have a great day,
Yuri

-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------

i.MX ProcessorsのトピックRe: iMX6DL : How to reset the PCIe core ?

iMX6DL : How to reset the PCIe core ?

Re: iMX6DL : How to reset the PCIe core ?