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

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Message-ID: <20161021013128.GE30578@tiger>
Date:   Fri, 21 Oct 2016 09:31:28 +0800
From:   Shawn Guo <shawnguo@...nel.org>
To:     Jagan Teki <jteki@...nedev.com>
Cc:     linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Matteo Lisi <matteo.lisi@...icam.com>,
        Michael Trimarchi <michael@...rulasolutions.com>,
        Jagan Teki <jagan@...rulasolutions.com>,
        Sascha Hauer <kernel@...gutronix.de>,
        Fabio Estevam <fabio.estevam@....com>
Subject: Re: [PATCH v7 5/5] ARM: dts: imx6qdl-icore: Add FEC support

On Fri, Oct 14, 2016 at 02:57:23PM +0530, Jagan Teki wrote:
> From: Jagan Teki <jagan@...rulasolutions.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@...gutronix.de>
> Cc: Fabio Estevam <fabio.estevam@....com>
> Cc: Shawn Guo <shawnguo@...nel.org>
> Cc: Matteo Lisi <matteo.lisi@...icam.com>
> Cc: Michael Trimarchi <michael@...rulasolutions.com>
> Signed-off-by: Jagan Teki <jagan@...rulasolutions.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>;

DT maintainers do not like this container node.  So please, just like
fix regulator node, put the fixed clock directly under root and give the
node an unique name like clock-xxx.

> +
> +		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>;

s/117/IMX6QDL_CLK_ENET

Shawn

> +	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
>