linux-kernel - Re: [PATCH 4/4] arm64: dts: renesas: Add initial device tree for Yuridenki-Shokai Kakip board

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Message-ID: <467573be-f143-4cfc-a04e-86be092d1b58@kernel.org>
Date: Sat, 11 Jan 2025 10:34:52 +0100
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Nobuhiro Iwamatsu <iwamatsu@...auri.org>,
 Geert Uytterhoeven <geert+renesas@...der.be>,
 Magnus Damm <magnus.damm@...il.com>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>
Cc: linux-renesas-soc@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, Masato Kiuchi <kiuchi_masato@...idenki.co.jp>
Subject: Re: [PATCH 4/4] arm64: dts: renesas: Add initial device tree for
 Yuridenki-Shokai Kakip board

On 11/01/2025 09:09, Nobuhiro Iwamatsu wrote:
> +++ b/arch/arm64/boot/dts/renesas/r9a09g057h48-kakip.dts
> @@ -0,0 +1,138 @@
> +// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +/*
> + * Device Tree Source for Yuridenki-Shokai the Kakip board
> + *
> + * Copyright (C) 2024 Nobuhiro Iwamatsu <iwamatsu@...auri.org>
> + */
> +
> +/dts-v1/;
> +
> +#include <dt-bindings/pinctrl/renesas,r9a09g057-pinctrl.h>
> +#include <dt-bindings/gpio/gpio.h>
> +#include "r9a09g057.dtsi"
> +
> +/ {
> +	model = "Yuridenki-Shokai Kakip Board based on r9a09g057h48";
> +	compatible = "yuridenki,kakip", "renesas,r9a09g057h48", "renesas,r9a09g057";
> +
> +	aliases {
> +		serial0 = &scif;
> +		mmc0 = &sdhi0;
> +	};
> +
> +	chosen {
> +		bootargs = "ignore_loglevel";

Not really suitable for mainline DTS. This is just debugging, so drop.
Just like earlycon - not suitable for mainline usage.

> +		stdout-path = "serial0:115200n8";
> +	};
> +
> +	memory@...00000 {
> +		device_type = "memory";
> +		/* first 128MB is reserved for secure area. */
> +		reg = <0x0 0x48000000 0x1 0xF8000000>;
> +	};
> +
> +	reg_3p3v: regulator1 {

Keep consistent naming. regulator-1 or the name as in bindings:
'regulator-[0-9]v[0-9]'

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/devicetree/bindings/regulator/fixed-regulator.yaml?h=v6.11-rc1#n46

> +		compatible = "regulator-fixed";
> +
> +		regulator-name = "fixed-3.3V";
> +		regulator-min-microvolt = <3300000>;
> +		regulator-max-microvolt = <3300000>;
> +		regulator-boot-on;
> +		regulator-always-on;
> +	};
> +
> +	vqmmc_sdhi0: regulator-vccq-sdhi0 {

regulator-2? Why different styles of names?

> +		compatible = "regulator-gpio";
> +		regulator-name = "SDHI0 VccQ";
> +		gpios = <&pinctrl RZV2H_GPIO(A, 0) GPIO_ACTIVE_HIGH>;
> +		regulator-min-microvolt = <1800000>;
> +		regulator-max-microvolt = <3300000>;
> +		gpios-states = <0>;
> +		states = <3300000 0 1800000 1>;
> +	};
> +};
> +
> +&qextal_clk {
> +	clock-frequency = <24000000>;
> +};
> +
> +&pinctrl {
> +	scif_pins: scif {
> +		pins =  "SCIF_RXD", "SCIF_TXD";
> +	};
> +
> +	sd0-pwr-en-hog {
> +		gpio-hog;
> +		gpios = <RZV2H_GPIO(A, 1) GPIO_ACTIVE_HIGH>;
> +		output-high;
> +		line-name = "sd0_pwr_en";
> +	};
> +
> +	sdhi0_pins: sd0 {
> +		sd0_data {


No underscores in node names. Please follow DTS coding style.


Best regards,
Krzysztof