linux-kernel - Re: [PATCH v5 1/3] arm64: dts: Add a device tree for the Librem 5 phone

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Date:   Thu, 20 Aug 2020 19:01:28 -0300
From:   Fabio Estevam <festevam@...il.com>
To:     Martin Kepplinger <martin.kepplinger@...i.sm>
Cc:     Rob Herring <robh@...nel.org>, kernel@...i.sm,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Sascha Hauer <kernel@...gutronix.de>,
        NXP Linux Team <linux-imx@....com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Yongcai Huang <Anson.Huang@....com>,
        Guido Günther <agx@...xcpu.org>,
        "Angus Ainslie (Purism)" <angus@...ea.ca>,
        Mark Brown <broonie@...nel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        Daniel Baluta <daniel.baluta@....com>
Subject: Re: [PATCH v5 1/3] arm64: dts: Add a device tree for the Librem 5 phone

Hi Martin,

This looks good.

Only some minor comments:

On Fri, Jul 31, 2020 at 5:28 AM Martin Kepplinger
<martin.kepplinger@...i.sm> wrote:

> +       sound {
> +               compatible = "simple-audio-card";
> +               pinctrl-0 = <&pinctrl_hp>;

Please pass pinctrl-names = "default"; prior to pinctrl-0. Please
check globally in this patch.

> +&ecspi1 {
> +       pinctrl-names = "default";
> +       pinctrl-0 = <&pinctrl_ecspi1>;
> +       cs-gpios = <&gpio5 9 GPIO_ACTIVE_HIGH>;

This should be active low instead.

After 8cdcd8aeee28 ("spi: imx/fsl-lpspi: Convert to GPIO descriptors")
you should a similar message as in the kernel log:

flash@0 enforce active low on chipselect handle

> +       pinctrl_ecspi1: spi1grp {

ecspigrp {

> +       flash@53 {
> +               compatible = "lm3560";

This seems to be not documented. It also misses the vendor.

> +&i2c3 {
> +       clock-frequency = <387000>;
> +       pinctrl-names = "default";
> +       pinctrl-0 = <&pinctrl_i2c3>;
> +       status = "okay";
> +
> +       codec: audio-codec@1a {
> +               compatible = "wlf,wm8962";
> +               reg = <0x1a>; // 0x4a is the test address

Remove the comment, maybe?

Reviewed-by: Fabio Estevam <festevam@...il.com>