Re: [PATCH 2/2] ARM: dts: imx53: add support for USB armory board

Shawn Guo
2016-06-28T01:50:55Z

On Tue, Jun 21, 2016 at 04:50:53PM +0200, andrej-6l9oX9VzF44FueaiHvvTSg@public.gmane.org wrote:
> From: Andrej Rosano <andrej-6l9oX9VzF44FueaiHvvTSg@public.gmane.org>
>
> Add support for Inverse Path USB armory board, an open source
> flash-drive sized computer based on NXP i.MX53 SoC.
>
> https://inversepath.com/usbarmory
>
> Signed-off-by: Andrej Rosano <andrej-6l9oX9VzF44FueaiHvvTSg@public.gmane.org>
> ---
> arch/arm/boot/dts/Makefile | 1 +
> arch/arm/boot/dts/imx53-usbarmory.dts | 239 ++++++++++++++++++++++++++++++++++
> 2 files changed, 240 insertions(+)
> create mode 100644 arch/arm/boot/dts/imx53-usbarmory.dts
>
> diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
> index 414b427..f8f85ab 100644
> --- a/arch/arm/boot/dts/Makefile
> +++ b/arch/arm/boot/dts/Makefile
> @@ -303,6 +303,7 @@ dtb-$(CONFIG_SOC_IMX53) += \
> imx53-smd.dtb \
> imx53-tx53-x03x.dtb \
> imx53-tx53-x13x.dtb \
> + imx53-usbarmory.dtb \
> imx53-voipac-bsb.dtb
> dtb-$(CONFIG_SOC_IMX6Q) += \
> imx6dl-apf6dev.dtb \
> diff --git a/arch/arm/boot/dts/imx53-usbarmory.dts b/arch/arm/boot/dts/imx53-usbarmory.dts
> new file mode 100644
> index 0000000..9a172fd
> --- /dev/null
> +++ b/arch/arm/boot/dts/imx53-usbarmory.dts
> @@ -0,0 +1,239 @@
> +/*
> + * USB armory MkI device tree include file
> + * https://inversepath.com/usbarmory
> + *
> + * Copyright (C) 2015, Inverse Path
> + * Andrej Rosano <andrej-6l9oX9VzF44FueaiHvvTSg@public.gmane.org>
> + *
> + * Licensed under GPLv2
> + */

Maybe GPL/X11 dual licence to consider non-Linux users. There are
plenty of dual licence examples under arch/arm/boot/dts.

> +
> +/dts-v1/;
> +#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>;

Use the macro in include/dt-bindings/gpio/gpio.h for polarity.

> + linux,default-trigger = "heartbeat";
> + };
> + };
> +};
> +
> +&cpu0 {
> + operating-points = <
> + /* kHz */
> + 166666 850000
> + 400000 900000
> + 800000 1050000
> + >;

Can you put some comments in there explaining why you need a custom opp
table for the board?

> +};
> +
> +&esdhc1 {
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_esdhc1>;
> + status = "okay";
> +};
> +
> +&iomuxc {
> + pinctrl-names = "default";

The property makes no sense where there is no pinctrl-0 property.

> +
> + imx53-usbarmory {

This container node can be dropped to save an indentation level.

> + led_pin_gpio4_27: led_gpio4_27@0 {

Can this node be named in a similar scheme as other pinctrl entries?

> + fsl,pins = <
> + MX53_PAD_DISP0_DAT6__GPIO4_27 0x0
> + >;
> + };
> +
> + 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_pmic: i2c1grp_pmic {

Please try to sort these pinctrl entries alphabetically.

> + fsl,pins = <
> + MX53_PAD_EIM_D21__I2C1_SCL 0x0
> + MX53_PAD_EIM_D28__I2C1_SDA 0x0
> + >;
> + };
> +
> + /*
> + * UART mode pin header configration
> + * 3 - GPIO5[26], pull-down 100K
> + * 4 - GPIO5[27], pull-down 100K
> + * 5 - TX, pull-up 100K
> + * 6 - RX, pull-up 100K
> + * 7 - GPIO5[30], pull-down 100K
> + */
> + pinctrl_uart1: uart1grp {
> + fsl,pins = <
> + MX53_PAD_CSI0_DAT8__GPIO5_26 0xc0
> + MX53_PAD_CSI0_DAT9__GPIO5_27 0xc0
> + MX53_PAD_CSI0_DAT10__UART1_TXD_MUX 0x1e4
> + MX53_PAD_CSI0_DAT11__UART1_RXD_MUX 0x1e4
> + MX53_PAD_CSI0_DAT12__GPIO5_30 0xc0
> + >;
> + };
> +
> + /*
> + * GPIO mode pin header configuration
> + * 3 - GPIO5[26], pull-down 100K
> + * 4 - GPIO5[27], pull-down 100K
> + * 5 - GPIO5[28], pull-down 100K
> + * 6 - GPIO5[29], pull-down 100K
> + * 7 - GPIO5[30], pull-down 100K
> + */
> + pinctrl_gpio5: gpio5grp {

The entry is referenced nowhere.

> + fsl,pins = <
> + MX53_PAD_CSI0_DAT8__GPIO5_26 0xc0
> + MX53_PAD_CSI0_DAT9__GPIO5_27 0xc0
> + MX53_PAD_CSI0_DAT10__GPIO5_28 0xc0
> + MX53_PAD_CSI0_DAT11__GPIO5_29 0xc0
> + MX53_PAD_CSI0_DAT12__GPIO5_30 0xc0
> + >;
> + };
> +
> + /*
> + * SPI mode pin header configuration
> + * 3 - SCLK
> + * 4 - MOSI
> + * 5 - MISO
> + * 6 - /SS0
> + * 7 - /SS1
> + */
> + pinctrl_ecspi2: ecspi2grp {
> + fsl,pins = <
> + MX53_PAD_CSI0_DAT8__ECSPI2_SCLK 0x0
> + MX53_PAD_CSI0_DAT9__ECSPI2_MOSI 0x0
> + MX53_PAD_CSI0_DAT10__ECSPI2_MISO 0x0
> + MX53_PAD_CSI0_DAT11__GPIO5_29 0x0
> + MX53_PAD_CSI0_DAT12__GPIO5_30 0x0
> + >;
> + };
> +
> + /*
> + * I2C mode pin header configuration
> + * 3 - SDA
> + * 4 - SCL
> + * 5 - GPIO5[28], pull-down 100K
> + * 6 - GPIO5[29], pull-down 100K
> + * 7 - GPIO5[30], pull-down 100K
> + */
> + pinctrl_i2c1_pinheader: i2c1grp_pinheader {

The entry is referenced nowhere.

> + fsl,pins = <
> + MX53_PAD_CSI0_DAT8__I2C1_SDA 0x0
> + MX53_PAD_CSI0_DAT9__I2C1_SCL 0x0
> + MX53_PAD_CSI0_DAT10__GPIO5_28 0xc0
> + MX53_PAD_CSI0_DAT11__GPIO5_29 0xc0
> + MX53_PAD_CSI0_DAT12__GPIO5_30 0xc0
> + >;
> + };
> + };
> +};
> +
> +&uart1 {
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_uart1>;
> + status = "okay";
> +};
> +
> +&usbotg {
> + dr_mode = "peripheral";
> + status = "okay";
> +};
> +
> +&i2c1 {

Please sort these nodes alphabetically in label name.

> + pinctrl-0 = <&pinctrl_i2c1_pmic>;
> + status = "okay";

Have a newline between property list and sub-node.

> + ltc3589: pmic@34 {
> + compatible = "lltc,ltc3589-2";
> + reg = <0x34>;

Ditto

Shawn

> + 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;
> + };
> + 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>;
> + };
> + };
> + };
> +};
> --
> 2.9.0
>
>
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