> 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 > <[email protected]> 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.
