Re: [PATCH] ARM: dts: imx5: Add dts files for USB armory.

[Shawn Guo]

On Fri, Mar 27, 2015 at 01:23:00PM -0700, Vagrant Cascadian wrote:
> Add support for the USB armory board by Inverse Path. This board
> features a Freescale iMX53 SoC, 512MB RAM, and USB OTG operating in
> either peripheral or host mode, and 5 GPIO pins.
> 
> One .dtb is generated for operating in peripheral mode, and one is
> generated for operating in host mode.

Is it possible to ask bootloader to patch the dtb instead of maintaining
a new one for just changing one USB property?

> 
> Signed-off-by: Vagrant Cascadian <vagrant@xxxxxxxxxx>
> Cc: Andrej Rosano <andrej@xxxxxxxxxxxxxxx>
> Cc: Rob Herring <robh+dt@xxxxxxxxxx>
> Cc: Pawel Moll <pawel.moll@xxxxxxx>
> Cc: Mark Rutland <mark.rutland@xxxxxxx>
> Cc: Ian Campbell <ijc+devicetree@xxxxxxxxxxxxxx>
> Cc: Kumar Gala <galak@xxxxxxxxxxxxxx>
> Cc: Russell King <linux@xxxxxxxxxxxxxxxx>
> Cc: Shawn Guo <shawn.guo@xxxxxxxxxx>
> Cc: Sascha Hauer <kernel@xxxxxxxxxxxxxx>
> Cc: devicetree@xxxxxxxxxxxxxxx
> Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
> Cc: linux-kernel@xxxxxxxxxxxxxxx
> ---
>  arch/arm/boot/dts/Makefile                      |   2 +
>  arch/arm/boot/dts/imx53-usbarmory-host_mode.dts |  17 +++
>  arch/arm/boot/dts/imx53-usbarmory.dts           |  13 ++
>  arch/arm/boot/dts/imx53-usbarmory.dtsi          | 183 ++++++++++++++++++++++++
>  4 files changed, 215 insertions(+)
>  create mode 100644 arch/arm/boot/dts/imx53-usbarmory-host_mode.dts
>  create mode 100644 arch/arm/boot/dts/imx53-usbarmory.dts
>  create mode 100644 arch/arm/boot/dts/imx53-usbarmory.dtsi
> 
> diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
> index a1c776b..bd2258b 100644
> --- a/arch/arm/boot/dts/Makefile
> +++ b/arch/arm/boot/dts/Makefile
> @@ -244,6 +244,8 @@ dtb-$(CONFIG_SOC_IMX53) += \
>  	imx53-smd.dtb \
>  	imx53-tx53-x03x.dtb \
>  	imx53-tx53-x13x.dtb \
> +	imx53-usbarmory.dtb \
> +	imx53-usbarmory-host_mode.dtb \
>  	imx53-voipac-bsb.dtb
>  dtb-$(CONFIG_SOC_IMX6Q) += \
>  	imx6dl-aristainetos_4.dtb \
> diff --git a/arch/arm/boot/dts/imx53-usbarmory-host_mode.dts b/arch/arm/boot/dts/imx53-usbarmory-host_mode.dts
> new file mode 100644
> index 0000000..a94cb1d
> --- /dev/null
> +++ b/arch/arm/boot/dts/imx53-usbarmory-host_mode.dts
> @@ -0,0 +1,17 @@
> +/*
> + * Copyright 2015 Inverse Path, S.r.l.
> + *
> + * The code contained herein is licensed under the GNU General Public
> + * License. You may obtain a copy of the GNU General Public License
> + * Version 2 or later at the following locations:
> + *
> + * http://www.opensource.org/licenses/gpl-license.html
> + * http://www.gnu.org/copyleft/gpl.html
> + */

For new dts file, we suggest to use GPL/X11 dual-license for considering
non-Linux device tree users.  Below is an example.

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

> +
> +/dts-v1/;
> +#include "imx53-usbarmory.dtsi"
> +
> +&usbotg {
> +	dr_mode = "host";
> +};
> diff --git a/arch/arm/boot/dts/imx53-usbarmory.dts b/arch/arm/boot/dts/imx53-usbarmory.dts
> new file mode 100644
> index 0000000..c86a4d8
> --- /dev/null
> +++ b/arch/arm/boot/dts/imx53-usbarmory.dts
> @@ -0,0 +1,13 @@
> +/*
> + * Copyright 2015 Inverse Path, S.r.l.
> + *
> + * The code contained herein is licensed under the GNU General Public
> + * License. You may obtain a copy of the GNU General Public License
> + * Version 2 or later at the following locations:
> + *
> + * http://www.opensource.org/licenses/gpl-license.html
> + * http://www.gnu.org/copyleft/gpl.html
> + */
> +
> +/dts-v1/;
> +#include "imx53-usbarmory.dtsi"
> diff --git a/arch/arm/boot/dts/imx53-usbarmory.dtsi b/arch/arm/boot/dts/imx53-usbarmory.dtsi
> new file mode 100644
> index 0000000..b4a9052
> --- /dev/null
> +++ b/arch/arm/boot/dts/imx53-usbarmory.dtsi
> @@ -0,0 +1,183 @@
> +/*
> + * Copyright 2015 Inverse Path, S.r.l.
> + *
> + * The code contained herein is licensed under the GNU General Public
> + * License. You may obtain a copy of the GNU General Public License
> + * Version 2 or later at the following locations:
> + *
> + * http://www.opensource.org/licenses/gpl-license.html
> + * http://www.gnu.org/copyleft/gpl.html
> + */
> +
> +#include "imx53.dtsi"
> +
> +/ {
> +	model = "Inverse Path USB armory";
> +	compatible = "inversepath,imx53-usbarmory", "fsl,imx53";
> +};
> +
> +/ {
> +	chosen {
> +		stdout-path = &uart1;
> +	};
> +
> +	memory {
> +		reg = <0x70000000 0x20000000>;
> +	};
> +
> +	leds {
> +		compatible = "gpio-leds";
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&led_pin_gpio4_27>;
> +
> +		user {
> +			label = "LED";
> +			gpios = <&gpio4 27 0>;
> +			linux,default-trigger = "heartbeat";
> +		};
> +	};
> +};
> +
> +&esdhc1 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_esdhc1>;
> +	status = "okay";
> +};
> +
> +&iomuxc {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_hog>;
> +
> +	imx53-usbarmory {
> +		pinctrl_hog: hoggrp {
> +			fsl,pins = <
> +				MX53_PAD_GPIO_0__CCM_SSI_EXT1_CLK 0x80000000
> +				MX53_PAD_GPIO_8__GPIO1_8          0x80000000
> +				MX53_PAD_PATA_DATA14__GPIO2_14    0x80000000
> +				MX53_PAD_PATA_DATA15__GPIO2_15    0x80000000
> +				MX53_PAD_EIM_DA11__GPIO3_11       0x80000000
> +				MX53_PAD_EIM_DA12__GPIO3_12       0x80000000
> +				MX53_PAD_PATA_DA_0__GPIO7_6       0x80000000
> +				MX53_PAD_PATA_DA_2__GPIO7_8	  0x80000000
> +				MX53_PAD_GPIO_16__GPIO7_11        0x80000000

Please use a proper pad configuration value instead of using whatever
comes from firmware.

> +			>;
> +		};
> +
> +		led_pin_gpio4_27: led_gpio4_27@0 {
> +			fsl,pins = <
> +				MX53_PAD_DISP0_DAT6__GPIO4_27 0x80000000

Ditto

> +			>;
> +		};
> +
> +		pinctrl_esdhc1: esdhc1grp {
> +			fsl,pins = <
> +				MX53_PAD_SD1_DATA0__ESDHC1_DAT0		0x1d5
> +				MX53_PAD_SD1_DATA1__ESDHC1_DAT1		0x1d5
> +				MX53_PAD_SD1_DATA2__ESDHC1_DAT2		0x1d5
> +				MX53_PAD_SD1_DATA3__ESDHC1_DAT3		0x1d5
> +				MX53_PAD_SD1_CMD__ESDHC1_CMD		0x1d5
> +				MX53_PAD_SD1_CLK__ESDHC1_CLK		0x1d5
> +			>;
> +		};
> +
> +		pinctrl_i2c1: i2c1grp {
> +			fsl,pins = <
> +				MX53_PAD_CSI0_DAT8__I2C1_SDA	0xc0000000
> +				MX53_PAD_CSI0_DAT9__I2C1_SCL	0xc0000000

Ditto

> +			>;
> +		};
> +
> +		pinctrl_uart1: uart1grp {
> +			fsl,pins = <
> +				MX53_PAD_CSI0_DAT10__UART1_TXD_MUX	0x1e4
> +				MX53_PAD_CSI0_DAT11__UART1_RXD_MUX	0x1e4
> +			>;
> +		};
> +	};
> +};
> +
> +&uart1 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_uart1>;
> +	status = "okay";
> +};
> +
> +&vpu {
> +	status = "okay";
> +};

This is unnecessary, as vpu block is always enabled in imx53.dtsi.

> +
> +&usbotg {
> +	dr_mode = "peripheral";
> +	status = "okay";
> +};
> +
> +&i2c1 {

Please sort the node alphabetically in label names.

> +	ltc3589: pmic@34 {
> +		compatible = "lltc,ltc3589-2";
> +		reg = <0x34>;
> +
> +		regulators {
> +			sw1_reg: sw1 {
> +				regulator-min-microvolt = <591930>;
> +				regulator-max-microvolt = <1224671>;
> +				lltc,fb-voltage-divider = <100000 158000>;
> +				regulator-ramp-delay = <7000>;
> +				regulator-boot-on;
> +				regulator-always-on;
> +			};
> +
> +			sw2_reg: sw2 {
> +				regulator-min-microvolt = <704123>;
> +				regulator-max-microvolt = <1456803>;
> +				lltc,fb-voltage-divider = <180000 191000>;
> +				regulator-ramp-delay = <7000>;
> +				regulator-boot-on;
> +				regulator-always-on;
> +			};
> +
> +			sw3_reg: sw3 {
> +				regulator-min-microvolt = <1341250>;
> +				regulator-max-microvolt = <2775000>;
> +				lltc,fb-voltage-divider = <270000 100000>;
> +				regulator-ramp-delay = <7000>;
> +				regulator-boot-on;
> +				regulator-always-on;
> +			};
> +
> +			bb_out_reg: bb-out {
> +				regulator-min-microvolt = <3387341>;
> +				regulator-max-microvolt = <3387341>;
> +				lltc,fb-voltage-divider = <511000 158000>;
> +				regulator-boot-on;
> +				regulator-always-on;
> +			};

Miss a new line here.

Shawn

> +			ldo1_reg: ldo1 {
> +				regulator-min-microvolt = <1306329>;
> +				regulator-max-microvolt = <1306329>;
> +				lltc,fb-voltage-divider = <100000 158000>;
> +				regulator-boot-on;
> +				regulator-always-on;
> +			};
> +
> +			ldo2_reg: ldo2 {
> +				regulator-min-microvolt = <704123>;
> +				regulator-max-microvolt = <1456806>;
> +				lltc,fb-voltage-divider = <180000 191000>;
> +				regulator-ramp-delay = <7000>;
> +				regulator-boot-on;
> +				regulator-always-on;
> +			};
> +
> +			ldo3_reg: ldo3 {
> +				regulator-min-microvolt = <2800000>;
> +				regulator-max-microvolt = <2800000>;
> +				regulator-boot-on;
> +			};
> +
> +			ldo4_reg: ldo4 {
> +				regulator-min-microvolt = <1200000>;
> +				regulator-max-microvolt = <3200000>;
> +			};
> +		};
> +	};
> +};
> -- 
> 2.1.4
> 


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