[PATCH] ARM: dts: imx6: Add Embest MarS Board

Shawn Guo shawn.guo at linaro.org
Mon Apr 27 01:39:18 PDT 2015 

On Wed, Apr 01, 2015 at 10:10:09AM +0200, Vianney le Clément de Saint-Marcq wrote:
> Add device tree for the Embest/Element 14 MarS Board [1], an i.MX6 Dual
> based development board.
> 
> The e-MMC chip is disabled because initialization fails (error -110).
> A possible cause is described in [2].

If eMMC doesn't work yet, you should just not add it.

> 
> [1] http://www.embest-tech.com/shop/star/marsboard.html
> [2] https://community.freescale.com/message/442168#442168
> 
> Signed-off-by: Vianney le Clément de Saint-Marcq <vianney.leclement at essensium.com>
> ---
>  arch/arm/boot/dts/Makefile            |   1 +
>  arch/arm/boot/dts/imx6q-marsboard.dts | 401 ++++++++++++++++++++++++++++++++++
>  2 files changed, 402 insertions(+)
>  create mode 100644 arch/arm/boot/dts/imx6q-marsboard.dts
> 
> diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
> index 91bd5bd..06fa33e 100644
> --- a/arch/arm/boot/dts/Makefile
> +++ b/arch/arm/boot/dts/Makefile
> @@ -249,6 +249,7 @@ dtb-$(CONFIG_ARCH_MXC) += \
>  	imx6q-gw54xx.dtb \
>  	imx6q-gw552x.dtb \
>  	imx6q-hummingboard.dtb \
> +	imx6q-marsboard.dtb \
>  	imx6q-nitrogen6x.dtb \
>  	imx6q-phytec-pbab01.dtb \
>  	imx6q-rex-pro.dtb \
> diff --git a/arch/arm/boot/dts/imx6q-marsboard.dts b/arch/arm/boot/dts/imx6q-marsboard.dts
> new file mode 100644
> index 0000000..30265c6
> --- /dev/null
> +++ b/arch/arm/boot/dts/imx6q-marsboard.dts
> @@ -0,0 +1,401 @@
> +/*
> + * Copyright 2015 Vianney le Clément de Saint-Marcq, Essensium NV
> + *  Based on imx6dl-riotboard.dts Copyright Iain Paton.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + *
> + */

For new dts file, we suggest to use GPL/X11 dual-license for non-Linux
users. Find example below.

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/arch/arm/boot/dts/imx6q-hummingboard.dts

> +
> +/dts-v1/;
> +#include "imx6q.dtsi"
> +#include <dt-bindings/gpio/gpio.h>
> +
> +/ {
> +	model = "MarS Board i.MX6 Dual Board";
> +	compatible = "embest,imx6q-marsboard", "fsl,imx6q";
> +
> +	memory {
> +		reg = <0x10000000 0x40000000>;
> +	};
> +
> +	regulators {
> +		compatible = "simple-bus";
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +
> +		reg_2p5v: regulator at 0 {
> +			compatible = "regulator-fixed";
> +			reg = <0>;
> +			regulator-name = "2P5V";
> +			regulator-min-microvolt = <2500000>;
> +			regulator-max-microvolt = <2500000>;
> +		};
> +
> +		reg_3p3v: regulator at 1 {
> +			compatible = "regulator-fixed";
> +			reg = <1>;
> +			regulator-name = "3P3V";
> +			regulator-min-microvolt = <3300000>;
> +			regulator-max-microvolt = <3300000>;
> +		};
> +
> +		reg_usb_otg_vbus: regulator at 2 {
> +			compatible = "regulator-fixed";
> +			reg = <2>;
> +			regulator-name = "usb_otg_vbus";
> +			regulator-min-microvolt = <5000000>;
> +			regulator-max-microvolt = <5000000>;
> +			gpio = <&gpio3 22 0>;

Use the definition in dt-bindings/gpio/gpio.h.  That's why you include
it in the file, right?

> +		};
> +	};
> +
> +	leds {
> +		compatible = "gpio-leds";
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&pinctrl_led>;
> +
> +		led0: user1 {

The label is defined for nothing.

> +			label = "user1";
> +			gpios = <&gpio5 2 GPIO_ACTIVE_LOW>;
> +			default-state = "on";
> +			linux,default-trigger = "heartbeat";
> +		};
> +
> +		led1: user2 {
> +			label = "user2";
> +			gpios = <&gpio3 28 GPIO_ACTIVE_LOW>;
> +			default-state = "off";
> +		};
> +	};
> +};
> +
> +&audmux {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_audmux>;
> +	status = "okay";
> +};
> +
> +&ecspi1 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_ecspi1>;
> +	cs-gpios = <&gpio2 30 0>;

Ditto

> +	fsl,spi-num-chipselects = <1>;
> +	status = "okay";
> +
> +	flash: m25p80 at 0 {
> +		compatible = "st,sst25vf016b";
> +		reg = <0>;
> +		spi-max-frequency = <20000000>;
> +		#address-cells = <1>;
> +		#size-cells = <1>;
> +
> +		bootloader at 0 {
> +			reg = <0x00000000 0x00100000>;
> +			read-only;
> +		};
> +
> +		kernel at 100000 {
> +			reg = <0x00100000 0x00100000>;
> +		};

Do not put the partition table in the default DTS, as it's an
user/software level configuration.

> +	};
> +};
> +
> +&fec {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_enet>;
> +	phy-mode = "rgmii";
> +	status = "okay";
> +};
> +
> +&hdmi {
> +	ddc-i2c-bus = <&i2c2>;
> +	status = "okay";
> +};
> +
> +&i2c1 {
> +	clock-frequency = <100000>;
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_i2c1>;
> +	status = "okay";
> +};
> +
> +&i2c2 {
> +	clock-frequency = <100000>;
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_i2c2>;
> +	status = "okay";
> +};
> +
> +&i2c3 {
> +	clock-frequency = <100000>;
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_i2c3>;
> +	status = "okay";
> +};
> +
> +&pwm1 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_pwm1>;
> +	status = "okay";
> +};
> +
> +&pwm2 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_pwm2>;
> +	status = "okay";
> +};
> +
> +&pwm3 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_pwm3>;
> +	status = "okay";
> +};
> +
> +&pwm4 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_pwm4>;
> +	status = "okay";
> +};
> +
> +&uart1 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_uart1>;
> +	status = "okay";
> +};
> +
> +&uart2 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_uart2>;
> +	status = "okay";
> +};
> +
> +&uart3 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_uart3>;
> +	status = "okay";
> +};
> +
> +&uart4 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_uart4>;
> +	status = "okay";
> +};
> +
> +&uart5 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_uart5>;
> +	status = "okay";
> +};
> +
> +&usbh1 {
> +	dr_mode = "host";
> +	disable-over-current;
> +	status = "okay";
> +};
> +
> +&usbotg {
> +	vbus-supply = <&reg_usb_otg_vbus>;
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_usbotg>;
> +	disable-over-current;
> +	dr_mode = "otg";
> +	status = "okay";
> +};
> +
> +&usdhc2 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_usdhc2>;
> +	cd-gpios = <&gpio1 4 0>;
> +	vmmc-supply = <&reg_3p3v>;
> +	status = "okay";
> +};
> +
> +&usdhc3 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_usdhc3>;
> +	vmmc-supply = <&reg_3p3v>;
> +	non-removable;
> +	/* Disabled because eMMC initialization fails */
> +	/*status = "okay";*/
> +};
> +
> +&iomuxc {
> +	pinctrl-names = "default";

It makes no sense to have pinctrl-names without anything like pinctrl-0.

> +
> +	imx6-marsboard {
> +		pinctrl_audmux: audmuxgrp {
> +			fsl,pins = <
> +				MX6QDL_PAD_CSI0_DAT7__AUD3_RXD		0x130b0
> +				MX6QDL_PAD_CSI0_DAT4__AUD3_TXC		0x130b0
> +				MX6QDL_PAD_CSI0_DAT5__AUD3_TXD		0x110b0
> +				MX6QDL_PAD_CSI0_DAT6__AUD3_TXFS		0x130b0
> +			>;
> +		};
> +
> +		pinctrl_ecspi1: ecspi1grp {
> +			fsl,pins = <
> +				MX6QDL_PAD_EIM_D16__ECSPI1_SCLK		0x100b1
> +				MX6QDL_PAD_EIM_D17__ECSPI1_MISO		0x100b1
> +				MX6QDL_PAD_EIM_D18__ECSPI1_MOSI		0x100b1
> +				MX6QDL_PAD_EIM_EB2__GPIO2_IO30		0x000b1		/* CS0 */
> +			>;
> +		};
> +
> +		pinctrl_ecspi2: ecspi2grp {
> +			fsl,pins = <
> +				MX6QDL_PAD_EIM_CS0__ECSPI2_SCLK		0x100b1
> +				MX6QDL_PAD_EIM_CS1__ECSPI2_MOSI		0x100b1
> +				MX6QDL_PAD_EIM_OE__ECSPI2_MISO		0x100b1
> +				MX6QDL_PAD_EIM_LBA__GPIO2_IO27		0x000b1		/* CS0 */
> +				MX6QDL_PAD_EIM_A17__GPIO2_IO21		0x000b1		/* IRQ */
> +			>;
> +		};
> +
> +		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		0x1b0b0
> +				MX6QDL_PAD_RGMII_TD0__RGMII_TD0		0x1b0b0
> +				MX6QDL_PAD_RGMII_TD1__RGMII_TD1		0x1b0b0
> +				MX6QDL_PAD_RGMII_TD2__RGMII_TD2		0x1b0b0
> +				MX6QDL_PAD_RGMII_TD3__RGMII_TD3		0x1b0b0
> +				MX6QDL_PAD_RGMII_TX_CTL__RGMII_TX_CTL	0x1b0b0
> +				MX6QDL_PAD_ENET_REF_CLK__ENET_TX_CLK	0x0a0b1		/* AR8035 CLK_25M --> ENET_REF_CLK (V22) */
> +				MX6QDL_PAD_RGMII_RXC__RGMII_RXC		0x1b0b0		/* AR8035 pin strapping: IO voltage: pull up */
> +				MX6QDL_PAD_RGMII_RD0__RGMII_RD0		0x130b0		/* AR8035 pin strapping: PHYADDR#0: pull down */
> +				MX6QDL_PAD_RGMII_RD1__RGMII_RD1		0x130b0		/* AR8035 pin strapping: PHYADDR#1: pull down */
> +				MX6QDL_PAD_RGMII_RD2__RGMII_RD2		0x1b0b0		/* AR8035 pin strapping: MODE#1: pull up */
> +				MX6QDL_PAD_RGMII_RD3__RGMII_RD3		0x1b0b0		/* AR8035 pin strapping: MODE#3: pull up */
> +				MX6QDL_PAD_RGMII_RX_CTL__RGMII_RX_CTL	0x130b0		/* AR8035 pin strapping: MODE#0: pull down */
> +				MX6QDL_PAD_EIM_D31__GPIO3_IO31		0x130b0		/* RGMII_nRST */
> +				MX6QDL_PAD_ENET_TX_EN__GPIO1_IO28	0x180b0		/* AR8035 interrupt */

Can we put the comment right above to shorten the lines a bit?

				/* AR8035 CLK_25M --> ENET_REF_CLK (V22) */
				MX6QDL_PAD_ENET_REF_CLK__ENET_TX_CLK	0x0a0b1
				/* AR8035 pin strapping: IO voltage: pull up */
				MX6QDL_PAD_RGMII_RXC__RGMII_RXC		0x1b0b0

> +			>;
> +		};
> +
> +		pinctrl_i2c1: i2c1grp {
> +			fsl,pins = <
> +				MX6QDL_PAD_CSI0_DAT8__I2C1_SDA		0x4001b8b1
> +				MX6QDL_PAD_CSI0_DAT9__I2C1_SCL		0x4001b8b1
> +			>;
> +		};
> +
> +		pinctrl_i2c2: i2c2grp {
> +			fsl,pins = <
> +				MX6QDL_PAD_KEY_COL3__I2C2_SCL		0x4001b8b1
> +				MX6QDL_PAD_KEY_ROW3__I2C2_SDA		0x4001b8b1
> +			>;
> +		};
> +
> +		pinctrl_i2c3: i2c3grp {
> +			fsl,pins = <
> +				MX6QDL_PAD_GPIO_5__I2C3_SCL		0x4001b8b1
> +				MX6QDL_PAD_GPIO_6__I2C3_SDA		0x4001b8b1
> +			>;
> +		};
> +
> +		pinctrl_led: ledgrp {
> +			fsl,pins = <
> +				MX6QDL_PAD_EIM_A25__GPIO5_IO02		0x1b0b1	/* user led0 */
> +				MX6QDL_PAD_EIM_D28__GPIO3_IO28		0x1b0b1	/* user led1 */
> +			>;
> +		};
> +
> +		pinctrl_pwm1: pwm1grp {
> +			fsl,pins = <
> +				MX6QDL_PAD_GPIO_9__PWM1_OUT		0x1b0b1
> +			>;
> +		};
> +
> +		pinctrl_pwm2: pwm2grp {
> +			fsl,pins = <
> +				MX6QDL_PAD_SD1_DAT2__PWM2_OUT		0x1b0b1
> +			>;
> +		};
> +
> +		pinctrl_pwm3: pwm3grp {
> +			fsl,pins = <
> +				MX6QDL_PAD_SD4_DAT1__PWM3_OUT		0x1b0b1
> +			>;
> +		};
> +
> +		pinctrl_pwm4: pwm4grp {
> +			fsl,pins = <
> +				MX6QDL_PAD_SD4_DAT2__PWM4_OUT		0x1b0b1
> +			>;
> +		};
> +
> +		pinctrl_uart1: uart1grp {
> +			fsl,pins = <
> +				MX6QDL_PAD_CSI0_DAT10__UART1_TX_DATA	0x1b0b1
> +				MX6QDL_PAD_CSI0_DAT11__UART1_RX_DATA	0x1b0b1
> +				MX6QDL_PAD_EIM_D19__UART1_CTS_B		0x1b0b1
> +				MX6QDL_PAD_EIM_D20__UART1_RTS_B		0x1b0b1
> +			>;
> +		};
> +
> +		pinctrl_uart2: uart2grp {
> +			fsl,pins = <
> +				MX6QDL_PAD_EIM_D26__UART2_TX_DATA	0x1b0b1
> +				MX6QDL_PAD_EIM_D27__UART2_RX_DATA	0x1b0b1
> +			>;
> +		};
> +
> +		pinctrl_uart3: uart3grp {
> +			fsl,pins = <
> +				MX6QDL_PAD_EIM_D24__UART3_TX_DATA	0x1b0b1
> +				MX6QDL_PAD_EIM_D25__UART3_RX_DATA	0x1b0b1
> +				MX6QDL_PAD_EIM_EB3__UART3_RTS_B		0x1b0b1
> +				MX6QDL_PAD_EIM_D23__UART3_CTS_B		0x1b0b1
> +			>;
> +		};
> +
> +		pinctrl_uart4: uart4grp {
> +			fsl,pins = <
> +				MX6QDL_PAD_KEY_COL0__UART4_TX_DATA	0x1b0b1
> +				MX6QDL_PAD_KEY_ROW0__UART4_RX_DATA	0x1b0b1
> +			>;
> +		};
> +
> +		pinctrl_uart5: uart5grp {
> +			fsl,pins = <
> +				MX6QDL_PAD_KEY_COL1__UART5_TX_DATA	0x1b0b1
> +				MX6QDL_PAD_KEY_ROW1__UART5_RX_DATA	0x1b0b1
> +			>;
> +		};
> +
> +		pinctrl_usbotg: usbotggrp {
> +			fsl,pins = <
> +				MX6QDL_PAD_ENET_RX_ER__USB_OTG_ID	0x17059
> +				MX6QDL_PAD_EIM_D22__GPIO3_IO22		0x000b0	/* MX6QDL_PAD_EIM_D22__USB_OTG_PWR */

What does the comment mean?

Shawn

> +				MX6QDL_PAD_EIM_D21__USB_OTG_OC		0x1b0b0
> +			>;
> +		};
> +
> +		pinctrl_usdhc2: usdhc2grp {
> +			fsl,pins = <
> +				MX6QDL_PAD_SD2_CMD__SD2_CMD		0x17059
> +				MX6QDL_PAD_SD2_CLK__SD2_CLK		0x10059
> +				MX6QDL_PAD_SD2_DAT0__SD2_DATA0		0x17059
> +				MX6QDL_PAD_SD2_DAT1__SD2_DATA1		0x17059
> +				MX6QDL_PAD_SD2_DAT2__SD2_DATA2		0x17059
> +				MX6QDL_PAD_SD2_DAT3__SD2_DATA3		0x17059
> +				MX6QDL_PAD_GPIO_4__GPIO1_IO04		0x1b0b0	/* SD2 CD */
> +			>;
> +		};
> +
> +		pinctrl_usdhc3: usdhc3grp {
> +			fsl,pins = <
> +				MX6QDL_PAD_SD3_CMD__SD3_CMD		0x17059
> +				MX6QDL_PAD_SD3_CLK__SD3_CLK		0x10059
> +				MX6QDL_PAD_SD3_DAT0__SD3_DATA0		0x17059
> +				MX6QDL_PAD_SD3_DAT1__SD3_DATA1		0x17059
> +				MX6QDL_PAD_SD3_DAT2__SD3_DATA2		0x17059
> +				MX6QDL_PAD_SD3_DAT3__SD3_DATA3		0x17059
> +				MX6QDL_PAD_SD3_RST__GPIO7_IO08		0x1b0b0	/* SD3 RST (eMMC) */
> +			>;
> +		};
> +	};
> +};
> -- 
> 2.3.5
>

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