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Date: Mon, 6 May 2024 10:20:47 +0200
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Frank Wunderlich <linux@...web.de>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>,
 Michael Turquette <mturquette@...libre.com>, Stephen Boyd
 <sboyd@...nel.org>, Pavel Machek <pavel@....cz>, Lee Jones <lee@...nel.org>,
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
 Matthias Brugger <matthias.bgg@...il.com>,
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Cc: Frank Wunderlich <frank-w@...lic-files.de>,
 Eric Woudstra <ericwouds@...il.com>, Tianling Shen <cnsztl@...ortalwrt.org>,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-clk@...r.kernel.org, linux-leds@...r.kernel.org,
 netdev@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 linux-mediatek@...ts.infradead.org, Tianling Shen <cnsztl@...il.com>
Subject: Re: [RFC v1 5/5] arm64: dts: mediatek: Add mt7986 based Bananapi R3
 Mini

On 05/05/2024 18:45, Frank Wunderlich wrote:
> From: Frank Wunderlich <frank-w@...lic-files.de>
> 
> Add device Tree for Bananapi R3 Mini SBC.
> 
> Co-developed-by: Eric Woudstra <ericwouds@...il.com>
> Signed-off-by: Eric Woudstra <ericwouds@...il.com>
> Co-developed-by: Tianling Shen <cnsztl@...il.com>
> Signed-off-by: Tianling Shen <cnsztl@...il.com>
> Signed-off-by: Frank Wunderlich <frank-w@...lic-files.de>
> ---
>  arch/arm64/boot/dts/mediatek/Makefile         |   1 +
>  .../mediatek/mt7986a-bananapi-bpi-r3-mini.dts | 486 ++++++++++++++++++
>  2 files changed, 487 insertions(+)
>  create mode 100644 arch/arm64/boot/dts/mediatek/mt7986a-bananapi-bpi-r3-mini.dts
> 
> diff --git a/arch/arm64/boot/dts/mediatek/Makefile b/arch/arm64/boot/dts/mediatek/Makefile
> index 37b4ca3a87c9..1763b001ab06 100644
> --- a/arch/arm64/boot/dts/mediatek/Makefile
> +++ b/arch/arm64/boot/dts/mediatek/Makefile
> @@ -11,6 +11,7 @@ dtb-$(CONFIG_ARCH_MEDIATEK) += mt7622-bananapi-bpi-r64.dtb
>  dtb-$(CONFIG_ARCH_MEDIATEK) += mt7981b-xiaomi-ax3000t.dtb
>  dtb-$(CONFIG_ARCH_MEDIATEK) += mt7986a-acelink-ew-7886cax.dtb
>  dtb-$(CONFIG_ARCH_MEDIATEK) += mt7986a-bananapi-bpi-r3.dtb
> +dtb-$(CONFIG_ARCH_MEDIATEK) += mt7986a-bananapi-bpi-r3-mini.dtb
>  dtb-$(CONFIG_ARCH_MEDIATEK) += mt7986a-bananapi-bpi-r3-emmc.dtbo
>  dtb-$(CONFIG_ARCH_MEDIATEK) += mt7986a-bananapi-bpi-r3-nand.dtbo
>  dtb-$(CONFIG_ARCH_MEDIATEK) += mt7986a-bananapi-bpi-r3-nor.dtbo
> diff --git a/arch/arm64/boot/dts/mediatek/mt7986a-bananapi-bpi-r3-mini.dts b/arch/arm64/boot/dts/mediatek/mt7986a-bananapi-bpi-r3-mini.dts
> new file mode 100644
> index 000000000000..c764b4dc4752
> --- /dev/null
> +++ b/arch/arm64/boot/dts/mediatek/mt7986a-bananapi-bpi-r3-mini.dts
> @@ -0,0 +1,486 @@
> +// SPDX-License-Identifier: (GPL-2.0 OR MIT)
> +/*
> + * Copyright (C) 2021 MediaTek Inc.
> + * Authors: Frank Wunderlich <frank-w@...lic-files.de>
> + *          Eric Woudstra <ericwouds@...il.com>
> + *          Tianling Shen <cnsztl@...ortalwrt.org>
> + */
> +
> +/dts-v1/;
> +
> +#include <dt-bindings/gpio/gpio.h>
> +#include <dt-bindings/input/input.h>
> +#include <dt-bindings/leds/common.h>
> +#include <dt-bindings/pinctrl/mt65xx.h>
> +
> +#include "mt7986a.dtsi"
> +
> +/ {
> +	model = "Bananapi BPI-R3 Mini";
> +	chassis-type = "embedded";
> +	compatible = "bananapi,bpi-r3mini", "mediatek,mt7986a";
> +
> +	aliases {
> +		serial0 = &uart0;
> +		ethernet0 = &gmac0;
> +		ethernet1 = &gmac1;
> +	};
> +
> +	chosen {
> +		stdout-path = "serial0:115200n8";
> +	};
> +
> +	dcin: regulator-12vd {

Please use name for all fixed regulators which matches current format
recommendation: 'regulator-[0-9]+v[0-9]+'

https://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator.git/commit/?id=b6d4b3500d57370f5b3abf0701c9166b384db976

> +		compatible = "regulator-fixed";
> +		regulator-name = "12vd";
> +		regulator-min-microvolt = <12000000>;
> +		regulator-max-microvolt = <12000000>;
> +		regulator-boot-on;
> +		regulator-always-on;
> +	};
> +
> +	fan: pwm-fan {
> +		compatible = "pwm-fan";
> +		#cooling-cells = <2>;
> +		/* cooling level (0, 1, 2) - pwm inverted */
> +		cooling-levels = <255 96 0>;
> +		pwms = <&pwm 0 10000>;
> +		status = "okay";

Why? Where is it disabled?

> +	};
> +
> +	reg_1p8v: regulator-1p8v {

Please use name for all fixed regulators which matches current format
recommendation: 'regulator-[0-9]+v[0-9]+'

https://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator.git/commit/?id=b6d4b3500d57370f5b3abf0701c9166b384db976

In other places as well.



Best regards,
Krzysztof


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