Hi,
We have the custom board IMX8MMINI with Ethernet Phy dp83848, How to customize IMX8MM for RMII for Ethernet Phy dp83848 in Uboot and Linux and we are using 50MHz external oscillator clock for Ethernet Phy dp83848
uboot fsl-imx8mm-evk.dts
&iomuxc {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_hog_1>;
imx8mm-evk {
pinctrl_hog_1: hoggrp-1 {
fsl,pins = <
MX8MM_IOMUXC_GPIO1_IO08_GPIO1_IO8 0x19
>;
};
pinctrl_fec1: fec1grp {
fsl,pins = <
MX8MM_IOMUXC_ENET_MDC_ENET1_MDC 0x3
MX8MM_IOMUXC_ENET_MDIO_ENET1_MDIO 0x3
MX8MM_IOMUXC_ENET_TD3_ENET1_RGMII_TD3 0x1f
MX8MM_IOMUXC_ENET_TD2_ENET1_RGMII_TD2 0x1f
MX8MM_IOMUXC_ENET_TD1_ENET1_RGMII_TD1 0x1f
MX8MM_IOMUXC_ENET_TD0_ENET1_RGMII_TD0 0x1f
MX8MM_IOMUXC_ENET_RD3_ENET1_RGMII_RD3 0x91
MX8MM_IOMUXC_ENET_RD2_ENET1_RGMII_RD2 0x91
MX8MM_IOMUXC_ENET_RD1_ENET1_RGMII_RD1 0x91
MX8MM_IOMUXC_ENET_RD0_ENET1_RGMII_RD0 0x91
MX8MM_IOMUXC_ENET_TXC_ENET1_RGMII_TXC 0x1f
MX8MM_IOMUXC_ENET_RXC_ENET1_RGMII_RXC 0x91
MX8MM_IOMUXC_ENET_RX_CTL_ENET1_RGMII_RX_CTL 0x91
MX8MM_IOMUXC_ENET_TX_CTL_ENET1_RGMII_TX_CTL 0x1f
MX8MM_IOMUXC_SAI2_RXC_GPIO4_IO22 0x19
>;
};
&fec1 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_fec1>;
phy-mode = rmii; /*"rgmii-id";*/
phy-handle = <ðphy0>;
fsl,magic-packet;
status = "okay";
mdio {
#address-cells = <1>;
#size-cells = <0>;
ethphy0: ethernet-phy@0 {
compatible = "ethernet-phy-ieee802.3-c22";
reg = <0>;
at803x,led-act-blind-workaround;
at803x,eee-okay;
at803x,vddio-1p8v;
};
};
};
--------------------------------------------------------------------------------------------------
How to modify 50MHz in imx8mm_evk.c
static int setup_fec(void)
{
struct iomuxc_gpr_base_regs *const iomuxc_gpr_regs
= (struct iomuxc_gpr_base_regs *) IOMUXC_GPR_BASE_ADDR;
setup_iomux_fec();
/* Use 125M anatop REF_CLK1 for ENET1, not from external */
clrsetbits_le32(&iomuxc_gpr_regs->gpr[1],
IOMUXC_GPR_GPR1_GPR_ENET1_TX_CLK_SEL_SHIFT, 0);
return set_clk_enet(ENET_125MHZ);
}
and are there any other places we need to modify the code. Do help on the same
Regards
Santhosh Kumar S
Hi Santhosh
for rmii one can look at validation board:
imx8mm_val.h\configs\include - uboot-imx - i.MX U-Boot
imx8mm_val.c\imx8mm_val\freescale\board - uboot-imx - i.MX U-Boot
Best regards
igor
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Hi igor,
I am getting the below error in uboot
Net:
Error: ethernet@30be0000 address not set.
No ethernet found.
How can we resolve this
Regards
Santhosh
Hi igor,
I am getting the below error,
Net:
Error: ethernet@30be0000 address not set.
No ethernet found.
How can we resolve this
Regards
Santhosh
HI Igor
I am getting the below error when i tried to do mii info and mii read 0-1 0-6. Do let me know what may be the issue
u-boot=> mii info
NULL device name!
No such device: <NULL>
NULL device name!
No such device: <NULL>
NULL device name!
No such device: <NULL>
u-boot=> u-boot=> mii read 0-1 0-6
NULL device name!
No such device: <NULL>
Error reading from the PHY addr=00 reg=00
NULL device name!
No such device: <NULL>
Error reading from the PHY addr=00 reg=01
NULL device name!
No such device: <NULL>
Error reading from the PHY addr=00 reg=02
NULL device name!
No such device: <NULL>
Error reading from the PHY addr=00 reg=03
NULL device name!
No such device: <NULL>
Error reading from the PHY addr=00 reg=04
NULL device name!
No such device: <NULL>
Error reading from the PHY addr=00 reg=05
NULL device name!
No such device: <NULL>
Error reading from the PHY addr=00 reg=06
NULL device name!
No such device: <NULL>
Error reading from the PHY addr=01 reg=00
NULL device name!
No such device: <NULL>
Error reading from the PHY addr=01 reg=01
NULL device name!
No such device: <NULL>
Error reading from the PHY addr=01 reg=02
NULL device name!
No such device: <NULL>
Error reading from the PHY addr=01 reg=03
NULL device name!
No such device: <NULL>
Error reading from the PHY addr=01 reg=04
NULL device name!
No such device: <NULL>
Error reading from the PHY addr=01 reg=05
NULL device name!
No such device: <NULL>
Error reading from the PHY addr=01 reg=06
Hi igor,
Thanks i did the changes in the imx8mm_evk.c and imx8mm_evk.h and was able to compile
and also Can you guide me how to enable dp83848 natsemi.c driver in uboot configuration
I will port on the board and test it
Regards
Santhosh