[PATCH V6 07/15] ARM: dts: imx6q-dhcom: Use 1G ethernet on the PDK2 board

Christoph Niedermaier
2021-07-15T00:07:41Z

The PDK2 board is capable of running both 100M and 1G ethernet. However,
the i.MX6 has only one ethernet MAC, so it is possible to configure
either 100M or 1G Ethernet. In case of 100M option, the PHY is on the
SoM and the signals are routed to a RJ45 port. For 1G the PHY is on
the PDK2 board with another RJ45 port. 100M and 1G ethernet use
different signal pins from the i.MX6, but share the MDIO bus.

This SoM board combination is used to demonstrate how to enable 1G
ethernet configuration.

Signed-off-by: Christoph Niedermaier <cniedermaier@dh-electronics.com>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Fabio Estevam <festevam@denx.de>
Cc: Marek Vasut <marex@denx.de>
Cc: NXP Linux Team <linux-imx@nxp.com>
Cc: kernel@dh-electronics.com
To: linux-arm-kernel@lists.infradead.org
---
V2: - Rebase on Shawn Guos branch for-next
V3: - Rework of the commit message
- Remove superfluous property max-speed
V4: - No changes
V5: - No changes
V6: - Rebase on 5.14-rc1
---
arch/arm/boot/dts/imx6q-dhcom-pdk2.dts | 51 ++++++++++++++++++++++++++++++++--
1 file changed, 48 insertions(+), 3 deletions(-)

diff --git a/arch/arm/boot/dts/imx6q-dhcom-pdk2.dts b/arch/arm/boot/dts/imx6q-dhcom-pdk2.dts
index 4d455831b3ca..3b0276de41f9 100644
--- a/arch/arm/boot/dts/imx6q-dhcom-pdk2.dts
+++ b/arch/arm/boot/dts/imx6q-dhcom-pdk2.dts
@@ -173,6 +173,46 @@
status = "disabled";
};

+/* 1G ethernet */
+/delete-node/ &ethphy0;
+&fec {
+ phy-mode = "rgmii";
+ phy-handle = <&ethphy7>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_enet_1G>;
+ status = "okay";
+
+ mdio {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ ethphy7: ethernet-phy@7 { /* KSZ 9021 */
+ compatible = "ethernet-phy-ieee802.3-c22";
+ interrupt-parent = <&gpio1>;
+ interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
+ pinctrl-0 = <&pinctrl_ethphy7>;
+ pinctrl-names = "default";
+ reg = <7>;
+ reset-gpios = <&gpio3 29 GPIO_ACTIVE_LOW>;
+ reset-assert-us = <1000>;
+ reset-deassert-us = <1000>;
+
+ rxc-skew-ps = <3000>;
+ rxd0-skew-ps = <0>;
+ rxd1-skew-ps = <0>;
+ rxd2-skew-ps = <0>;
+ rxd3-skew-ps = <0>;
+ txc-skew-ps = <3000>;
+ txd0-skew-ps = <0>;
+ txd1-skew-ps = <0>;
+ txd2-skew-ps = <0>;
+ txd3-skew-ps = <0>;
+ rxdv-skew-ps = <0>;
+ txen-skew-ps = <0>;
+ };
+ };
+};
+
&hdmi {
ddc-i2c-bus = <&i2c2>;
status = "okay";
@@ -255,9 +295,14 @@
MX6QDL_PAD_RGMII_RD2__RGMII_RD2 0x1b0b0
MX6QDL_PAD_RGMII_RD3__RGMII_RD3 0x1b0b0
MX6QDL_PAD_RGMII_RX_CTL__RGMII_RX_CTL 0x1b0b0
- MX6QDL_PAD_EIM_D29__GPIO3_IO29 0x000b0
- MX6QDL_PAD_GPIO_0__GPIO1_IO00 0x000b1
- MX6QDL_PAD_EIM_D26__GPIO3_IO26 0x000b1
+ >;
+ };
+
+ pinctrl_ethphy7: ethphy7-grp {
+ fsl,pins = <
+ MX6QDL_PAD_EIM_D29__GPIO3_IO29 0xb0 /* Reset */
+ MX6QDL_PAD_GPIO_0__GPIO1_IO00 0xb1 /* Int */
+ MX6QDL_PAD_EIM_D26__GPIO3_IO26 0xb1 /* WOL */
>;
};