i.mx6ul eth problem

strive — Fri, 09 Jun 2017 03:30:44 GMT

Dear Expert:

In i.mx6ul-evk,there is a picture below:

Could you tell me what function this pin "ENET1_nINT and ENET2_nINT" is, is this pin mapped to other pin or not?

If yes, which source file will we need modify in linux?

In this picture,Could you tell me what function this pin "ENET_MDIO and ENET_MDC" is, is this pin mapped to other pin or not?If yes, which source file will we need modify in linux?

thanks for you great support.

Re: i.mx6ul eth problem

weidong_sun — Fri, 09 Jun 2017 06:51:27 GMT

Hello Tom,

(1)Could you tell me what function this pin "ENET1_nINT and ENET2_nINT" is, is this pin mapped to other pin or not?

If yes, which source file will we need modify in linux?

--Yes, these 2 PINs can be mapped to other pins. only need 2 GPIO pins of Processor for them.

ethernet device tree file is imx6ul-14x14-evk.dts , but ENET1_nINT and ENET2_nINT are not used. so you also don't need to modify source code about them.

(2)In this picture,Could you tell me what function this pin "ENET_MDIO and ENET_MDC" is, is this pin mapped to other pin or not?If yes, which source file will we need modify in linux?

--ENET_MDIO and ENET_MDC are management pins of Ethernet, From I.MX6UL reference manual, They can be routed via other PADs:

these 4 signals can also be configured in imx6ul-14x14-evk.dts, but on i.mx6ul evk board, use one MDC & MDIO to mange 2 Ethernet, see following, please:

        pinctrl_enet2: enet2grp {
           fsl,pins = <
               MX6UL_PAD_GPIO1_IO07__ENET2_MDC       0x1b0b0
               MX6UL_PAD_GPIO1_IO06__ENET2_MDIO   0x1b0b0
               MX6UL_PAD_ENET2_RX_EN__ENET2_RX_EN   0x1b0b0
               MX6UL_PAD_ENET2_RX_ER__ENET2_RX_ER   0x1b0b0
               MX6UL_PAD_ENET2_RX_DATA0__ENET2_RDATA00   0x1b0b0
               MX6UL_PAD_ENET2_RX_DATA1__ENET2_RDATA01   0x1b0b0
               MX6UL_PAD_ENET2_TX_EN__ENET2_TX_EN   0x1b0b0
               MX6UL_PAD_ENET2_TX_DATA0__ENET2_TDATA00   0x1b0b0
               MX6UL_PAD_ENET2_TX_DATA1__ENET2_TDATA01   0x1b0b0
               MX6UL_PAD_ENET2_TX_CLK__ENET2_REF_CLK2   0x4001b031
           >;

So if you want re-map them, you can modify above 2 lines with Bold.

Have a great day,
TIC Weidong Sun

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Re: i.mx6ul eth problem

strive — Tue, 13 Jun 2017 08:16:35 GMT

thanks for your great support.

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Re: i.mx6ul eth problem