linux-kernel - Re: [PATCH V2] arm64: dts: imx: Add Beacon i.mx8mm development kit

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Message-ID: <CAOMZO5AqjrQxGcHVLPRQXC0nRUM+hOeWtnAK2vJ=O_P28FZ3-g@mail.gmail.com>
Date:   Tue, 10 Mar 2020 22:24:01 -0300
From:   Fabio Estevam <festevam@...il.com>
To:     Adam Ford <aford173@...il.com>
Cc:     "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        aford@...conembeddedworks.com, Rob Herring <robh+dt@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        NXP Linux Team <linux-imx@....com>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V2] arm64: dts: imx: Add Beacon i.mx8mm development kit

Hi Adam,

On Tue, Mar 10, 2020 at 10:01 PM Adam Ford <aford173@...il.com> wrote:

> +&ecspi2 {
> +       pinctrl-names = "default";
> +       pinctrl-0 = <&pinctrl_espi2>;
> +       cs-gpios = <&gpio5 9 0>;

You could use GPIO_ACTIVE_HIGH instead of hardcoded 0.

> +       status = "okay";
> +
> +       at25@0 {

Node names should be generic:

eeprom@0

> +               compatible = "atmel,at25";

Documentation/devicetree/bindings/eeprom/at25.txt states:

"- compatible : Should be "<vendor>,<type>", and generic value "atmel,at25".
  Example "<vendor>,<type>" values:
    "microchip,25lc040"
    "st,m95m02"
    "st,m95256"

> +&i2c4 {
> +

Unneeded blank line.

> diff --git a/arch/arm64/boot/dts/freescale/beacon-imx8mm-kit.dts b/arch/arm64/boot/dts/freescale/beacon-imx8mm-kit.dts
> new file mode 100644
> index 000000000000..417b15d345d5
> --- /dev/null
> +++ b/arch/arm64/boot/dts/freescale/beacon-imx8mm-kit.dts
> @@ -0,0 +1,19 @@
> +// SPDX-License-Identifier: (GPL-2.0 OR MIT)
> +/*
> + * Copyright 2020 Compass Electronics Group, LLC
> + */
> +
> +/dts-v1/;
> +
> +#include "imx8mm.dtsi"
> +#include "beacon-imx8mm-som.dtsi"
> +#include "beacon-imx8mm-baseboard.dtsi"

The naming convention we use is to start the dts names with the i.MX
SoC name, so:

imx8mm-beacon-som.dtsi
imx8mm-beacon-baseboard.dtsi

> +/ {
> +       model = "Beacon EmbeddedWorks i.MX8M Mini Development Kit";
> +       compatible = "fsl,imx8mm";

You should add an Entry for Beacon in
Documentation/devicetree/bindings/vendor-prefixes.yaml on a separate
patch.

and then:

compatible = "beacon,imx8mm-beacon-kit", "fsl,imx8mm"

Also, please add an entry for this board in
Documentation/devicetree/bindings/arm/fsl.yaml

> +&i2c3 {
> +       clock-frequency = <400000>;
> +       pinctrl-names = "default";
> +       pinctrl-0 = <&pinctrl_i2c3>;
> +       status = "okay";
> +
> +       eeprom@50 {
> +               compatible = "atmel,24c64";

Same comment about the compatible.

> +&iomuxc {
> +

Unneeded blank line.

> +               pinctrl_fec1: fec1grp {