linux-kernel - Re: [PATCH 1/2] ARM: dts: tegra20: add labels to i2c nodes

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Date:   Fri, 20 Dec 2019 17:00:46 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Richard Leitner <richard.leitner@...data.com>, robh+dt@...nel.org,
        mark.rutland@....com, thierry.reding@...il.com,
        jonathanh@...dia.com
Cc:     devicetree@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] ARM: dts: tegra20: add labels to i2c nodes

19.12.2019 16:04, Richard Leitner пишет:
> Add numbered labels to the i2c nodes of the Tegra20 SoC so we just need
> to alias it from derived boards.
> 
> Signed-off-by: Richard Leitner <richard.leitner@...data.com>
> ---
>  arch/arm/boot/dts/tegra20.dtsi | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/arch/arm/boot/dts/tegra20.dtsi b/arch/arm/boot/dts/tegra20.dtsi
> index 9c58e7fcf5c0..e02f75757a7e 100644
> --- a/arch/arm/boot/dts/tegra20.dtsi
> +++ b/arch/arm/boot/dts/tegra20.dtsi
> @@ -464,7 +464,7 @@
>  		clocks = <&tegra_car TEGRA20_CLK_RTC>;
>  	};
>  
> -	i2c@...0c000 {
> +	i2c1: i2c@...0c000 {
>  		compatible = "nvidia,tegra20-i2c";
>  		reg = <0x7000c000 0x100>;
>  		interrupts = <GIC_SPI 38 IRQ_TYPE_LEVEL_HIGH>;
> @@ -494,7 +494,7 @@
>  		status = "disabled";
>  	};
>  
> -	i2c@...0c400 {
> +	i2c2: i2c@...0c400 {
>  		compatible = "nvidia,tegra20-i2c";
>  		reg = <0x7000c400 0x100>;
>  		interrupts = <GIC_SPI 84 IRQ_TYPE_LEVEL_HIGH>;
> @@ -510,7 +510,7 @@
>  		status = "disabled";
>  	};
>  
> -	i2c@...0c500 {
> +	i2c3: i2c@...0c500 {
>  		compatible = "nvidia,tegra20-i2c";
>  		reg = <0x7000c500 0x100>;
>  		interrupts = <GIC_SPI 92 IRQ_TYPE_LEVEL_HIGH>;
> 

Hello Richard,

Why derived boards couldn't label nodes by themselves? That's what all
derived boards are doing already.

BTW, upstream should benefit from the submitted changes. This is not a
very useful change for upstream if you're not updating the actual DTs of
any of the boards in arch/arm/boot/dts/*.