topic Re: IMX6Q with TJA1101 in i.MX Processors

IMX6Q with TJA1101

dingwencai — Fri, 17 Apr 2020 06:47:19 GMT

Due to project needs, we connected the TJA1101 chip to the IMX6Q phy.And I use driver https://community.nxp.com/external-link.jspa?url=https%3A%2F%2Fsource.codeaurora.org%2Fexternal%2Fimx%2Flinux-imx%2Ftree…

Kernel version 4.9.11

dts changes：

&fec {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_enet>;
phy-mode = "rmii";
phy-reset-gpios = <&gpio1 25 0>;
fsl,magic-packet;
status = "okay";
};

pinctrl_enet: enetgrp {
fsl,pins = <
MX6QDL_PAD_ENET_MDIO__ENET_MDIO 0x1b0b0
MX6QDL_PAD_ENET_MDC__ENET_MDC 0x1b0b0
MX6QDL_PAD_RGMII_TXC__RGMII_TXC 0x1b030
MX6QDL_PAD_RGMII_TD0__RGMII_TD0 0x1b030
MX6QDL_PAD_RGMII_TD1__RGMII_TD1 0x1b030
MX6QDL_PAD_RGMII_TD2__RGMII_TD2 0x1b030
MX6QDL_PAD_RGMII_TD3__RGMII_TD3 0x1b030
MX6QDL_PAD_RGMII_TX_CTL__RGMII_TX_CTL 0x1b030
MX6QDL_PAD_ENET_REF_CLK__ENET_TX_CLK 0x1b0b0
MX6QDL_PAD_RGMII_RXC__RGMII_RXC 0x1b030
MX6QDL_PAD_RGMII_RD0__RGMII_RD0 0x1b030
MX6QDL_PAD_RGMII_RD1__RGMII_RD1 0x1b030
MX6QDL_PAD_RGMII_RD2__RGMII_RD2 0x1b030
MX6QDL_PAD_RGMII_RD3__RGMII_RD3 0x1b030
MX6QDL_PAD_RGMII_RX_CTL__RGMII_RX_CTL 0x1b030
MX6QDL_PAD_GPIO_16__ENET_REF_CLK 0x4001b0a8
MX6QDL_PAD_ENET_TX_EN__GPIO1_IO28 0x00020000
>;
};

pinctrl_enet_irq: enetirqgrp {
fsl,pins = <
MX6QDL_PAD_GPIO_6__ENET_IRQ 0x000b1
>;
};

It seems that TJA1101 is not working correctly, what else needs to be changed for dts.And how can I make sure that TJA1101 is working properly?

Thanks.

Re: IMX6Q with TJA1101

dingwencai — Fri, 17 Apr 2020 06:59:42 GMT

And I can see kernel printf:

[ OK ] Started D-Bus System Message Bus.
[ OK ] Started Rilmuxd Daemon.
[ OK ] Started QCMAP connectionManager service.
[ OK ] Started Network Service.
TJA1101 2188000.ethernet:00: attached PHY driver [TJA1101] (mii_bus:phy_addr=2188000.ethernet:00, irq=-1)
[ OK ] Started NBD server.
[ OK ] Started NTP client/server.
QCMAP:Start Main

Re: IMX6Q with TJA1101

Rita_Wang — Sat, 18 Apr 2020 05:41:29 GMT

You can refer to this https://community.nxp.com/message/1111935

Re: IMX6Q with TJA1101

dingwencai — Mon, 20 Apr 2020 03:03:05 GMT

Sorry, I checked the hardware connection, we are using mii, what else needs to be changed for dts?

Re: IMX6Q with TJA1101

Rita_Wang — Tue, 21 Apr 2020 07:58:54 GMT

I see that you are using the TJA1100, not TJA1101.

For ethernet MII mode, total signals are 18, in your device tree you need to configure the pins.

You can see the thread. https://community.nxp.com/message/989057

Re: IMX6Q with TJA1101

dingwencai — Tue, 21 Apr 2020 08:08:30 GMT

Sorry，the schematic mark is wrong.I confirmed it is TJA1101.So,is there a device tree for reference?

Re: IMX6Q with TJA1101

Rita_Wang — Wed, 29 Apr 2020 07:39:15 GMT

Using NXP's standard driver makes porting to the i.MX 6 simple. Porting needs to
address the following three areas:
• Pin configuration
• Source code
• Ethernet connection configuration

And for our newer BSP support the TJA1100, take the 4.14 release supports TJA1100 Ethernet PHY as an example linux/arch/arm64/boot/dts/freescale/fsl-imx8qxp-enet2-tja1100.dtsi