[PATCH v7 5/5] ARM: dts: imx6qdl-icore: Add FEC support

Jagan Teki
2016-10-14T09:29:05Z

From: Jagan Teki <jagan@amarulasolutions.com>

Add FEC support for Engicam i.CoreM6 dql modules.

Observed similar 'eth0: link is not ready' issue which was
discussed in [1] due rmii mode with external ref_clk, so added
clock node along with the properties mentioned by Shawn in [2]

FEC link log:
------------
$ ifconfig eth0 up
[ 27.905187] SMSC LAN8710/LAN8720 2188000.ethernet:00: attached PHY driver
[SMSC LAN8710/LAN8720] (mii_bus:phy_addr=2188000.ethernet:00, irq=-1)
[ 27.918982] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready

[1] https://patchwork.kernel.org/patch/3491061/
[2] https://patchwork.kernel.org/patch/3490511/

Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Matteo Lisi <matteo.lisi@engicam.com>
Cc: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
---
Changes for v7:
- none
Changes for v6:
- none
Changes for v5:
- new patch

arch/arm/boot/dts/imx6qdl-icore.dtsi | 37 ++++++++++++++++++++++++++++++++++++
1 file changed, 37 insertions(+)

diff --git a/arch/arm/boot/dts/imx6qdl-icore.dtsi b/arch/arm/boot/dts/imx6qdl-icore.dtsi
index 4e79858..972f48f 100644
--- a/arch/arm/boot/dts/imx6qdl-icore.dtsi
+++ b/arch/arm/boot/dts/imx6qdl-icore.dtsi
@@ -48,6 +48,18 @@
reg = <0x10000000 0x80000000>;
};

+ clocks {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ rmii_clk: clock@0 {
+ compatible = "fixed-clock";
+ reg = <0>;
+ #clock-cells = <0>;
+ clock-frequency = <25000000>; /* 25MHz for example */
+ };
+ };
+
reg_3p3v: regulator-3p3v {
compatible = "regulator-fixed";
regulator-name = "3P3V";
@@ -93,6 +105,15 @@
assigned-clock-parents = <&clks IMX6QDL_CLK_OSC>;
};

+&fec {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_enet>;
+ phy-reset-gpios = <&gpio7 12 GPIO_ACTIVE_LOW>;
+ clocks = <&clks 117>, <&clks 117>, <&rmii_clk>;
+ phy-mode = "rmii";
+ status = "okay";
+};
+
&gpmi {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_gpmi_nand>;
@@ -150,6 +171,22 @@
};

&iomuxc {
+ pinctrl_enet: enetgrp {
+ fsl,pins = <
+ MX6QDL_PAD_ENET_CRS_DV__ENET_RX_EN 0x1b0b0
+ MX6QDL_PAD_GPIO_16__ENET_REF_CLK 0x1b0b1
+ MX6QDL_PAD_ENET_TX_EN__ENET_TX_EN 0x1b0b0
+ MX6QDL_PAD_ENET_RXD1__ENET_RX_DATA1 0x1b0b0
+ MX6QDL_PAD_ENET_RXD0__ENET_RX_DATA0 0x1b0b0
+ MX6QDL_PAD_ENET_TXD1__ENET_TX_DATA1 0x1b0b0
+ MX6QDL_PAD_ENET_TXD0__ENET_TX_DATA0 0x1b0b0
+ MX6QDL_PAD_ENET_MDC__ENET_MDC 0x1b0b0
+ MX6QDL_PAD_ENET_MDIO__ENET_MDIO 0x1b0b0
+ MX6QDL_PAD_ENET_REF_CLK__GPIO1_IO23 0x1b0b0
+ MX6QDL_PAD_GPIO_17__GPIO7_IO12 0x1b0b0
+ >;
+ };
+
pinctrl_flexcan1: flexcan1grp {
fsl,pins = <
MX6QDL_PAD_KEY_ROW2__FLEXCAN1_RX 0x1b020
--
2.7.4