linux-kernel - Re: [PATCH v1 13/19] arm: dts: mt7623: move node mt6323 leds to mt6323.dtsi

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Message-ID: <20180302154050.lfxojro4woucl6lh@rob-hp-laptop>
Date:   Fri, 2 Mar 2018 09:40:50 -0600
From:   Rob Herring <robh@...nel.org>
To:     sean.wang@...iatek.com
Cc:     matthias.bgg@...il.com, mark.rutland@....com,
        devicetree@...r.kernel.org, linux-mediatek@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Lee Jones <lee.jones@...aro.org>
Subject: Re: [PATCH v1 13/19] arm: dts: mt7623: move node mt6323 leds to
 mt6323.dtsi

On Fri, Feb 23, 2018 at 06:16:33PM +0800, sean.wang@...iatek.com wrote:
> From: Sean Wang <sean.wang@...iatek.com>
> 
> Since those LEDs are parts of PMIC MT6323, it is reasonable to merge
> those LEDs node definition back into mt6323.dtsi. This way can improve
> the reusability of those nodes among different boards with the same PMIC.
> 
> Signed-off-by: Sean Wang <sean.wang@...iatek.com>
> Cc: Lee Jones <lee.jones@...aro.org>
> ---
>  arch/arm/boot/dts/mt6323.dtsi                 | 26 ++++++++++++++++++++++++-
>  arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts | 28 ---------------------------
>  2 files changed, 25 insertions(+), 29 deletions(-)
> 
> diff --git a/arch/arm/boot/dts/mt6323.dtsi b/arch/arm/boot/dts/mt6323.dtsi
> index 7c783d6..44c5642 100644
> --- a/arch/arm/boot/dts/mt6323.dtsi
> +++ b/arch/arm/boot/dts/mt6323.dtsi
> @@ -1,5 +1,5 @@
>  /*
> - * Copyright (c) 2017 MediaTek Inc.
> + * Copyright (c) 2017-2018 MediaTek Inc.
>   * Author: John Crispin <john@...ozen.org>
>   *	   Sean Wang <sean.wang@...iatek.com>
>   * This program is free software; you can redistribute it and/or modify
> @@ -237,5 +237,29 @@
>  				regulator-enable-ramp-delay = <216>;
>  			};
>  		};
> +
> +		leds {
> +			compatible = "mediatek,mt6323-led";
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +
> +			led@0 {
> +				reg = <0>;
> +				label = "mt6323:isink:green";

Changing the label potentially breaks userspace. And the fact that it is 
a green LED is very much board specific. So I think the old location was 
correct. You could put the parent node here and leave these child nodes 
in the board specific dts file.


> +				default-state = "off";
> +			};
> +
> +			led@1 {
> +				reg = <1>;
> +				label = "mt6323:isink:red";
> +				default-state = "off";
> +			};
> +
> +			led@2 {
> +				reg = <2>;
> +				label = "mt6323:isink:blue";
> +				default-state = "off";
> +			};
> +		};
>  	};
>  };
> diff --git a/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts b/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts
> index 75e61c4..767b225 100644
> --- a/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts
> +++ b/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts
> @@ -483,34 +483,6 @@
>  	status = "okay";
>  };
>  
> -&pwrap {
> -	mt6323 {
> -		mt6323led: led {
> -			compatible = "mediatek,mt6323-led";
> -			#address-cells = <1>;
> -			#size-cells = <0>;
> -
> -			led@0 {
> -				reg = <0>;
> -				label = "bpi-r2:isink:green";
> -				default-state = "off";
> -			};
> -
> -			led@1 {
> -				reg = <1>;
> -				label = "bpi-r2:isink:red";
> -				default-state = "off";
> -			};
> -
> -			led@2 {
> -				reg = <2>;
> -				label = "bpi-r2:isink:blue";
> -				default-state = "off";
> -			};
> -		};
> -	};
> -};
> -
>  &spi0 {
>  	pinctrl-names = "default";
>  	pinctrl-0 = <&spi0_pins_a>;
> -- 
> 2.7.4
>