Core-3308Y MAC configuration

时间的蝴蝶

1. It is recommended to use an external clock.

2. Internal clock reference:

&mac {
phy-supply = <&vcc_phy>;
  assigned-clocks = <&cru SCLK_MAC>;
  //assigned-clock-parents = <&mac_clkin>;
  clock_in_out = "output";
  pinctrl-names = "default";
  pinctrl-0 = <&rmiim_pins &macm_refclk>;
  snps,reset-gpio = <&gpio0 RK_PB2 GPIO_ACTIVE_LOW>;
  snps,reset-active-low;
  snps,reset-delays-us = <0 50000 50000>;
  status = "okay";
};