Hi
i want to set mii speed of fec as 1 Mhz on imx8mp.
how to i set mii speed 1 Mhz?
Right now it's 2.5 Mhz.
we are try to set using fec_main.c file but not able to set some time its very high frequncy.
here added fec mii speed snap
mii_speed = DIV_ROUND_UP(clk_get_rate(fep->clk_ipg), 5000000);
if (fep->quirks & FEC_QUIRK_ENET_MAC)
mii_speed--;
if (mii_speed > 63) {
dev_err(&pdev->dev,
"fec clock (%lu) too fast to get right mii speed\n",
clk_get_rate(fep->clk_ipg));
err = -EINVAL;
goto err_out;
}
holdtime = DIV_ROUND_UP(clk_get_rate(fep->clk_ipg), 100000000) - 1;
fep->phy_speed = mii_speed << 1 | holdtime << 8;
writel(fep->phy_speed, fep->hwp + FEC_MII_SPEED);
As per code we are below value are geting for 2.5 Mhz
mii_speed = 54
clk_get_rate(fep->clk_ipg) = 266666666
holdtime = 2
How to set 1 Mhz instead of 2.5 Mhz ?
which value i want to change ?
we are using imx8mp 5.4 kernel
