RGMII txc没有时钟

发表于 2018-4-18 11:49

本人使用i.mx6，RGMII接口连接PHY（100Mbps），使用飞思卡尔标准驱动（fec），能读到phy的id，设置了pll6，搞了了各种时钟配置，pinmux配置，都无法让RGMII txc输出时钟信号

发表于 2018-4-18 11:50

clk设置：
fec: ethernet@02188000 {
compatible = "fsl,imx6q-fec";
reg = <0x02188000 0x4000>;
interrupts-extended = <&intc 0 118 0x04>,
<&intc 0 119 0x04>;
clocks = <&clks 117>, <&clks 117>, <&clks 190>, <&clks 177>;
clock-names = "ipg", "ahb", "ptp","enet_out";
status = "okay";
};

发表于 2018-4-18 11:51

pinmux：
MX6QDL_PAD_ENET_MDIO__ENET_MDIO    0x1b0b0
MX6QDL_PAD_ENET_MDC__ENET_MDC       0x130b0
MX6QDL_PAD_RGMII_RXC__RGMII_RXC    0x1b0b0
MX6QDL_PAD_RGMII_RD0__RGMII_RD0    0x130b0
MX6QDL_PAD_RGMII_RD1__RGMII_RD1    0x130b0
MX6QDL_PAD_RGMII_RD2__RGMII_RD2    0x130b0
MX6QDL_PAD_RGMII_RD3__RGMII_RD3    0x130b0
MX6QDL_PAD_RGMII_RX_CTL__RGMII_RX_CTL 0x130b0
MX6QDL_PAD_RGMII_TXC__RGMII_TXC    0x130b0
MX6QDL_PAD_RGMII_TD0__RGMII_TD0    0x130b0
MX6QDL_PAD_RGMII_TD1__RGMII_TD1    0x130b0
MX6QDL_PAD_RGMII_TD2__RGMII_TD2    0x130b0
MX6QDL_PAD_RGMII_TD3__RGMII_TD3    0x130b0
MX6QDL_PAD_RGMII_TX_CTL__RGMII_TX_CTL 0x130b0

发表于 2018-4-18 11:53

&fec {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_enet_2>;
phy-mode = "rgmii";
status = "okay";
};
另外，rxc从phy出来是25MHZ，只要执行busybox ifconfig eth0 up,立即被拉到5MHZ

发表于 2018-4-18 11:53

要爆炸了

[i.MX] RGMII txc没有时钟

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