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Date:   Thu, 29 Aug 2019 09:54:05 +0200
From:   Marco Felsch <m.felsch@pengutronix.de>
To:     Oliver Graute <oliver.graute@gmail.com>
Cc:     shawnguo@kernel.org, Mark Rutland <mark.rutland@arm.com>,
        devicetree@vger.kernel.org, narmstrong@baylibre.com,
        Sascha Hauer <s.hauer@pengutronix.de>,
        linux-kernel@vger.kernel.org, Rob Herring <robh+dt@kernel.org>,
        NXP Linux Team <linux-imx@nxp.com>,
        Pengutronix Kernel Team <kernel@pengutronix.de>,
        Fabio Estevam <festevam@gmail.com>,
        linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCHv5 2/2] ARM: dts: Add support for i.MX6 UltraLite DART
 Variscite Customboard
Message-ID: <20190829075405.j7av4aojvzddlfz3@pengutronix.de>
References: <1567009160-21965-1-git-send-email-oliver.graute@gmail.com>
 <1567009160-21965-3-git-send-email-oliver.graute@gmail.com>
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Hi Oliver,

On 19-08-28 18:19, Oliver Graute wrote:
> This patch adds DeviceTree Source for the i.MX6 UltraLite DART NAND/WIFI
> 
> Signed-off-by: Oliver Graute <oliver.graute@gmail.com>
> Cc: Shawn Guo <shawnguo@kernel.org>
> Cc: Neil Armstrong <narmstrong@baylibre.com>
> ---
>  arch/arm/boot/dts/Makefile                      |   1 +
>  arch/arm/boot/dts/imx6ul-var-6ulcustomboard.dts | 196 ++++++++++++++++++++++++
>  2 files changed, 197 insertions(+)
>  create mode 100644 arch/arm/boot/dts/imx6ul-var-6ulcustomboard.dts
> 
> diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
> index a24a6a1..a2a69e4 100644
> --- a/arch/arm/boot/dts/Makefile
> +++ b/arch/arm/boot/dts/Makefile
> @@ -579,6 +579,7 @@ dtb-$(CONFIG_SOC_IMX6UL) += \
>  	imx6ul-tx6ul-0010.dtb \
>  	imx6ul-tx6ul-0011.dtb \
>  	imx6ul-tx6ul-mainboard.dtb \
> +	imx6ul-var-6ulcustomboard.dtb \
>  	imx6ull-14x14-evk.dtb \
>  	imx6ull-colibri-eval-v3.dtb \
>  	imx6ull-colibri-wifi-eval-v3.dtb \
> diff --git a/arch/arm/boot/dts/imx6ul-var-6ulcustomboard.dts b/arch/arm/boot/dts/imx6ul-var-6ulcustomboard.dts
> new file mode 100644
> index 00000000..1861b34
> --- /dev/null
> +++ b/arch/arm/boot/dts/imx6ul-var-6ulcustomboard.dts
> @@ -0,0 +1,196 @@
> +// SPDX-License-Identifier: (GPL-2.0)
> +/*
> + * Support for Variscite DART-6UL Module
> + *
> + * Copyright (C) 2015 Freescale Semiconductor, Inc.
> + * Copyright (C) 2015-2016 Variscite Ltd. - http://www.variscite.com
> + * Copyright (C) 2018-2019 Oliver Graute <oliver.graute@gmail.com>
> + */
> +
> +/dts-v1/;
> +
> +#include <dt-bindings/input/input.h>
> +#include "imx6ul-imx6ull-var-dart-common.dtsi"
> +
> +/ {
> +	model = "Variscite i.MX6 UltraLite Carrier-board";
> +	compatible = "variscite,6ulcustomboard", "fsl,imx6ul";
> +
> +	backlight {
> +		compatible = "pwm-backlight";
> +		pwms = <&pwm1 0 20000>;
> +		brightness-levels = <0 4 8 16 32 64 128 255>;
> +		default-brightness-level = <6>;
> +		status = "okay";
> +	};
> +
> +	gpio-keys {
> +		compatible = "gpio-keys";
> +
> +		user {
> +			gpios = <&gpio1 0 GPIO_ACTIVE_LOW>;

Please mux the gpios where you need them. In this case mux it within the
gpio-keys node.

> +			linux,code = <KEY_BACK>;
> +			gpio-key,wakeup;
> +		};
> +	};
> +
> +	gpio-leds {
> +		compatible = "gpio-leds";
> +
> +		d16-led {
> +			gpios = <&gpio4 20 GPIO_ACTIVE_HIGH>;

The same applies here.

> +			linux,default-trigger = "heartbeat";
> +		};
> +	};
> +
> +	sound {
> +		compatible = "simple-audio-card";
> +		simple-audio-card,name = "wm8731audio";
> +		simple-audio-card,widgets =
> +			"Headphone", "Headphone Jack",
> +			"Line", "Line Jack",
> +			"Microphone", "Mic Jack";
> +		simple-audio-card,routing =
> +			"Headphone Jack", "RHPOUT",
> +			"Headphone Jack", "LHPOUT",
> +			"LLINEIN", "Line Jack",
> +			"RLINEIN", "Line Jack",
> +			"MICIN", "Mic Bias",
> +			"Mic Bias", "Mic Jack";
> +		simple-audio-card,format = "i2s";
> +		simple-audio-card,bitclock-master = <&sound_master>;
> +		simple-audio-card,frame-master = <&sound_master>;
> +
> +		sound_master: simple-audio-card,cpu {
> +				sound-dai = <&sai2>;
> +		};

Where is the codec node?

> +	};
> +};
> +
> +&can1 {
> +	status = "okay";

We need to move the complete muxing from the SoM dtsi to the baseboard
for all baseboard related nodes.. I tought that the Dart 6UL layout
follows a specific standard but that isn't the case.

> +};
> +
> +&can2 {
> +	status = "okay";
> +};
> +
> +&fec1 {
> +	phy-mode = "rgmii";

This avoid such re-assigning here too. Also the imx6ul only support
10/100 Mbit/s. So rgmii makes no sense here.

> +	phy-reset-gpios = <&gpio5 0 GPIO_ACTIVE_LOW>;
> +	phy-handle = <&ethphy0>;
> +	status = "okay";
> +};
> +
> +&fec2 {
> +	phy-mode = "rgmii";
> +	phy-reset-gpios = <&gpio1 10 GPIO_ACTIVE_LOW>;
> +	phy-handle = <&ethphy1>;
> +	status = "okay";
> +};
> +
> +&i2c1 {
> +	clock-frequency = <400000>;
> +	status = "okay";
> +};
> +
> +&i2c2 {
> +	clock_frequency = <100000>;
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_i2c2>;
> +	status = "okay";
> +
> +	wm8731: audio-codec@1a {
> +		#sound-dai-cells = <0>;

Please move #sound-dai-cells below compatible and reg property.

> +		compatible = "wlf,wm8731";
> +		reg = <0x1a>;
> +		clocks = <&clks IMX6UL_CLK_SAI2>;
> +		clock-names = "mclk";
> +	};
> +
> +	touchscreen@38 {
> +		compatible = "edt,edt-ft5x06";
> +		reg = <0x38>;
> +		interrupt-parent = <&gpio3>;
> +		interrupts = <4 0>;

Make use of IRQ_TYPE_*

> +		touchscreen-size-x = <800>;
> +		touchscreen-size-y = <480>;
> +		touchscreen-inverted-x;
> +		touchscreen-inverted-y;
> +		wakeup-source;
> +	};
> +
> +	rtc@68 {
> +		compatible = "dallas,ds1337";
> +		reg = <0x68>;
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&pinctrl_rtc>;
> +		interrupt-parent = <&gpio5>;
> +		interrupts = <7 IRQ_TYPE_EDGE_FALLING>;
> +	};
> +};
> +
> +&lcdif {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_lcdif>;
> +	display = <&display0>;
> +	status = "okay";
> +
> +	display0: display0 {
> +		bits-per-pixel = <16>;
> +		bus-width = <24>;
> +
> +		display-timings {
> +			native-mode = <&timing0>;
> +			timing0: timing0 {
> +				clock-frequency =<35000000>;
> +				hactive = <800>;
> +				vactive = <480>;
> +				hfront-porch = <40>;
> +				hback-porch = <40>;
> +				hsync-len = <48>;
> +				vback-porch = <29>;
> +				vfront-porch = <13>;
> +				vsync-len = <3>;
> +				hsync-active = <0>;
> +				vsync-active = <0>;
> +				de-active = <1>;
> +				pixelclk-active = <0>;
> +			};
> +		};
> +	};
> +};
> +
> +&pwm1 {
> +	status = "okay";
> +};
> +
> +&uart1 {
> +	status = "okay";
> +};
> +
> +&uart2 {
> +	status = "okay";
> +};
> +
> +&uart3 {
> +	status = "okay";
> +};
> +
> +&usbotg1 {
> +	dr_mode = "host";
> +	status = "okay";
> +};
> +
> +&usbotg2 {
> +	dr_mode = "host";
> +	status = "okay";
> +};
> +
> +&iomuxc {
> +	pinctrl_rtc: rtcgrp {
> +		fsl,pins = <
> +			MX6UL_PAD_SNVS_TAMPER7__GPIO5_IO07	0x1b0b0
> +		>;
> +	};

As I said above, move the complete muxing pwm/usb/i2c/lcd/... from the
som dtsi to the baseboard dts because it is only valid for this
baseboard. Another baseboard using this som can have a complete
different mux option.

Regards,
  Marco


> +};
> -- 
> 2.7.4
> 
> 
> 

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