i.MX ProcessorsのトピックRe: IMX8MP ENET_QOS RGMII REF CLOCK

IMX8MP ENET_QOS RGMII REF CLOCK

Jerry_H — Wed, 13 Sep 2023 06:08:22 GMT

Hi,

we are trying to use ENET1 and ENET_QOS on IMX8MP.

For ENET1 the REF_CLOCK is listed in the signal mapping as GPIO1_IO00.

When I now look for the signal mapping for ENET_QOS there is no such pin defined.

Do I have to share the ENET1 clock signal using a clock buffer or are there any other pins use?

ENET1 and ENET_QOS should run in RGMII mode.

Any hints where to get this signal from?

Kind regards.

Zhiming_Liu — Fri, 15 Sep 2023 00:45:25 GMT

For EQOS CLOCK mapping, you can choose EXT_CLK_4 if you want to use external clock.

But in evk dtsi, eqos is using SYS_PLL1 and SYS_PLL2.

There is no clock name like ENET_QOS_REF_XXX, maybe the ENET_QOS_TIMER_CLK_ROOT is your need.

Best Regards

Zhiming