linux-kernel - Re: [PATCHv7 2/3] ARM: dts: Add support for i.MX6 UltraLite DART Variscite Customboard

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Date:   Wed, 13 Nov 2019 08:52:16 +0100
From:   Marco Felsch <m.felsch@...gutronix.de>
To:     Oliver Graute <oliver.graute@...il.com>
Cc:     shawnguo@...nel.org, narmstrong@...libre.com,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCHv7 2/3] ARM: dts: Add support for i.MX6 UltraLite DART
 Variscite Customboard


Hi Oliver,

I made my comments inline.

On 19-11-12 20:22, Oliver Graute wrote:
> This patch adds DeviceTree Source for the i.MX6 UltraLite DART NAND/WIFI
> 
> Signed-off-by: Oliver Graute <oliver.graute@...il.com>
> Cc: Shawn Guo <shawnguo@...nel.org>
> Cc: Neil Armstrong <narmstrong@...libre.com>
> Cc: Marco Felsch <m.felsch@...gutronix.de>
> ---
> Changelog:
> 
> v7
>  - fixed wakeup-source
> 
> v6:
>  - added some muxing
>  - added codec in sound node
>  - added adc1 node
> 
>  arch/arm/boot/dts/Makefile                      |   1 +
>  arch/arm/boot/dts/imx6ul-var-6ulcustomboard.dts | 221 ++++++++++++++++++++++++
>  2 files changed, 222 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 df2e1f2..65fac53 100644
> --- a/arch/arm/boot/dts/Makefile
> +++ b/arch/arm/boot/dts/Makefile
> @@ -583,6 +583,7 @@ 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..5b88aad
> --- /dev/null
> +++ b/arch/arm/boot/dts/imx6ul-var-6ulcustomboard.dts
> @@ -0,0 +1,221 @@
> +// 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@...il.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";

The status line can be dropped.

> +	};
> +
> +	gpio-keys {
> +		compatible = "gpio-keys";
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&pinctrl_gpio_keys>;

Where is the phandle?

> +
> +		user {
> +			gpios = <&gpio1 0 GPIO_ACTIVE_LOW>;
> +			linux,code = <KEY_BACK>;
> +			wakeup-source;
> +		};
> +	};
> +
> +	gpio-leds {
> +		compatible = "gpio-leds";
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&pinctrl_gpio_leds>;

Also this phandle.. I saw this a few times within this dts. Please make
sure that your dts(i) files are self-contained so move the muxing to
this dts. This happens a few time, I don't list all phandles.

> +
> +		d16-led {
> +			gpios = <&gpio4 20 GPIO_ACTIVE_HIGH>;
> +			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 = <&codec_dai>;
> +		simple-audio-card,frame-master = <&codec_dai>;
> +
> +		cpu_dai: simple-audio-card,cpu {

Do you need the cpu_dai phandle?

> +			sound-dai = <&sai2>;
> +		};
> +
> +		codec_dai: simple-audio-card,codec {
> +			sound-dai = <&wm8731>;
> +			system-clock-frequency = <12288000>;
> +		};
> +	};
> +};
> +
> +&adc1 {
> +	vref-supply = <&reg_touch_3v3>;

This is the only place where you use this regulator so can we move the
regulator to this dts instead of the common dtsi?

> +	status = "okay";
> +};
> +
> +&can1 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_flexcan1>;
> +	status = "okay";
> +};
> +
> +&can2 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_flexcan2>;
> +	status = "okay";
> +};
> +
> +&fec1 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_enet1>;
> +	status = "okay";
> +};
> +
> +&fec2 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_enet2>;
> +	status = "okay";
> +};
> +
> +&i2c1 {
> +	clock-frequency = <400000>;

Can this go to the common dtsi file?

> +	status = "okay";
> +};
> +
> +&i2c2 {
> +	clock_frequency = <100000>;
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_i2c2>;
> +	status = "okay";
> +
> +	wm8731: audio-codec@1a {
> +		compatible = "wlf,wm8731";
> +		reg = <0x1a>;
> +		#sound-dai-cells = <0>;
> +		clocks = <&clks IMX6UL_CLK_SAI2>;
> +		clock-names = "mclk";
> +	};
> +
> +	touchscreen@38 {
> +		compatible = "edt,edt-ft5x06";
> +		reg = <0x38>;
> +		interrupt-parent = <&gpio3>;
> +		interrupts = <4 IRQ_TYPE_NONE>;
> +		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 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_pwm1>;

Where goes this phandle?

> +	status = "okay";
> +};
> +
> +&uart1 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_uart1>;
> +	status = "okay";
> +};
> +
> +&uart2 {
> +	status = "okay";
> +};
> +
> +&uart3 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_uart3>;
> +	uart-has-rtscts;
> +	status = "okay";
> +};
> +
> +&usbotg1 {
> +	disable-over-current;
> +	dr_mode = "host";
> +	status = "okay";
> +};
> +
> +&usbotg2 {
> +	disable-over-current;
> +	dr_mode = "host";
> +	status = "okay";
> +};
> +
> +&iomuxc {
> +	pinctrl_rtc: rtcgrp {
> +		fsl,pins = <
> +			MX6UL_PAD_SNVS_TAMPER7__GPIO5_IO07	0x1b0b0
> +		>;
> +	};
> +};
> -- 
> 2.7.4
> 
> 

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