[PATCH 3/4] arm64: dts: imx8mp: Add FEC RMII pin mux on i.MX8MP DHCOM

[Marek Vasut]

The i.MX8MP DHCOM SoM may come with either external RGMII PHY or
LAN8740Ai RMII PHY on the SoM attached to FEC MAC. Add pin mux
settings for both options, so that DT overlay can override these
settings on SoM variant with the LAN8740Ai PHY.

Signed-off-by: Marek Vasut <marex at denx.de>
---
Cc: "NXP i.MX U-Boot Team" <uboot-imx at nxp.com>
Cc: Fabio Estevam <festevam at gmail.com>
Cc: Peng Fan <peng.fan at nxp.com>
Cc: Stefano Babic <sbabic at denx.de>
Cc: u-boot at lists.denx.de
---
 arch/arm/dts/imx8mp-dhcom-pdk2.dts |  2 ++
 arch/arm/dts/imx8mp-dhcom-som.dtsi | 22 +++++++++++++++++++---
 2 files changed, 21 insertions(+), 3 deletions(-)

diff --git a/arch/arm/dts/imx8mp-dhcom-pdk2.dts b/arch/arm/dts/imx8mp-dhcom-pdk2.dts
index 382fbedaf6b..ac104cd3e62 100644
--- a/arch/arm/dts/imx8mp-dhcom-pdk2.dts
+++ b/arch/arm/dts/imx8mp-dhcom-pdk2.dts
@@ -117,7 +117,9 @@
 /delete-node/ &ethphy1f;
 
 &fec {	/* Second ethernet */
+	pinctrl-0 = <&pinctrl_fec_rgmii>;
 	phy-handle = <&ethphypdk>;
+	phy-mode = "rgmii";
 
 	mdio {
 		ethphypdk: ethernet-phy at 7 { /* KSZ 9021 */
diff --git a/arch/arm/dts/imx8mp-dhcom-som.dtsi b/arch/arm/dts/imx8mp-dhcom-som.dtsi
index b56607dfb39..9fd8bce8065 100644
--- a/arch/arm/dts/imx8mp-dhcom-som.dtsi
+++ b/arch/arm/dts/imx8mp-dhcom-som.dtsi
@@ -129,9 +129,9 @@
 
 &fec {	/* Second ethernet */
 	pinctrl-names = "default";
-	pinctrl-0 = <&pinctrl_fec>;
+	pinctrl-0 = <&pinctrl_fec_rmii>;
 	phy-handle = <&ethphy1f>;
-	phy-mode = "rgmii";
+	phy-mode = "rmii";
 	fsl,magic-packet;
 	status = "okay";
 
@@ -723,7 +723,7 @@
 		>;
 	};
 
-	pinctrl_fec: dhcom-fec-grp {
+	pinctrl_fec_rgmii: dhcom-fec-rgmii-grp {	/* RGMII */
 		fsl,pins = <
 			MX8MP_IOMUXC_SAI1_MCLK__ENET1_TX_CLK		0x1f
 			MX8MP_IOMUXC_SAI1_RXD2__ENET1_MDC		0x3
@@ -744,6 +744,22 @@
 		>;
 	};
 
+	pinctrl_fec_rmii: dhcom-fec-rmii-grp {	/* RMII */
+		fsl,pins = <
+			MX8MP_IOMUXC_SAI1_RXD2__ENET1_MDC		0x3
+			MX8MP_IOMUXC_SAI1_RXD3__ENET1_MDIO		0x3
+			MX8MP_IOMUXC_SAI1_RXD4__ENET1_RGMII_RD0		0x91
+			MX8MP_IOMUXC_SAI1_RXD5__ENET1_RGMII_RD1		0x91
+			MX8MP_IOMUXC_SAI1_TXFS__ENET1_RGMII_RX_CTL	0x91
+			MX8MP_IOMUXC_SAI1_TXD6__ENET1_RX_ER		0x91
+			MX8MP_IOMUXC_SAI1_TXD0__ENET1_RGMII_TD0		0x1f
+			MX8MP_IOMUXC_SAI1_TXD1__ENET1_RGMII_TD1		0x1f
+			MX8MP_IOMUXC_SAI1_TXD4__ENET1_RGMII_TX_CTL	0x1f
+			/* Clock */
+			MX8MP_IOMUXC_SAI1_MCLK__ENET1_TX_CLK		0x4000001f
+		>;
+	};
+
 	pinctrl_flexcan1: dhcom-flexcan1-grp {
 		fsl,pins = <
 			MX8MP_IOMUXC_SPDIF_RX__CAN1_RX			0x154
-- 
2.39.1