Subject: Re: [PATCH 1/2] net: fec_mxc: Fix clk_ref rate on iMX93
Hi Peng,
On Mon, Sep 23, 2024 at 10:11 AM Primoz Fiser primoz.fiser@norik.com wrote:
Humm, but how did it work so far?
On phyboard-segin-imx93, this change breaks fec ethernet.
I had to revert this already in NXP downstream u-boot.
How does Linux handle this internal 1/2 divider?
Linux assigned-clock-rates set 250MHz, then internal divider will set real clock to 125MHz.
Which board did you use to test this?
I tested this on i.MX93-11x11-EVK.
Since this causes a regression on phyboard-segin-imx93, we cannot apply it.
I will double check on this change. But I think this change is required.
See fecmxc_set_ref_clk. Depending on the mode, the freq will be different. I see segin using rmii mode, while imx93evk use rgmii-id mode. This might be the difference.
Regards, Peng.
Thanks, Peng.
Please provide more details.