linux-kernel - Re: [PATCH v2 4/6] ARM: dts: sunxi: h3/h5: Update MBUS node

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Date:   Fri, 15 Oct 2021 17:29:48 +0900
From:   Chanwoo Choi <cw00.choi@...sung.com>
To:     Samuel Holland <samuel@...lland.org>,
        MyungJoo Ham <myungjoo.ham@...sung.com>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        Maxime Ripard <mripard@...nel.org>,
        Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Rob Herring <robh+dt@...nel.org>
Cc:     Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-pm@...r.kernel.org,
        linux-sunxi@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 4/6] ARM: dts: sunxi: h3/h5: Update MBUS node

On 10/4/21 10:27 AM, Samuel Holland wrote:
> In order to support memory dynamic frequency scaling (MDFS), the MBUS
> binding now requires enumerating more resources. Provide them in the
> device tree.
> 
> Since the H3 and H5 have different clock divider limits, they need
> separate compatibles.
> 
> Signed-off-by: Samuel Holland <samuel@...lland.org>
> ---
>  arch/arm/boot/dts/sun8i-h3.dtsi              |  4 ++++
>  arch/arm/boot/dts/sunxi-h3-h5.dtsi           | 11 ++++++++---
>  arch/arm64/boot/dts/allwinner/sun50i-h5.dtsi |  4 ++++
>  3 files changed, 16 insertions(+), 3 deletions(-)
> 
> diff --git a/arch/arm/boot/dts/sun8i-h3.dtsi b/arch/arm/boot/dts/sun8i-h3.dtsi
> index 4e89701df91f..43acb98cf390 100644
> --- a/arch/arm/boot/dts/sun8i-h3.dtsi
> +++ b/arch/arm/boot/dts/sun8i-h3.dtsi
> @@ -282,6 +282,10 @@ &display_clocks {
>  	compatible = "allwinner,sun8i-h3-de2-clk";
>  };
>  
> +&mbus {
> +	compatible = "allwinner,sun8i-h3-mbus";
> +};
> +
>  &mmc0 {
>  	compatible = "allwinner,sun7i-a20-mmc";
>  	clocks = <&ccu CLK_BUS_MMC0>,
> diff --git a/arch/arm/boot/dts/sunxi-h3-h5.dtsi b/arch/arm/boot/dts/sunxi-h3-h5.dtsi
> index c7428df9469e..3a683e190dab 100644
> --- a/arch/arm/boot/dts/sunxi-h3-h5.dtsi
> +++ b/arch/arm/boot/dts/sunxi-h3-h5.dtsi
> @@ -568,9 +568,14 @@ external_mdio: mdio@2 {
>  		};
>  
>  		mbus: dram-controller@...2000 {
> -			compatible = "allwinner,sun8i-h3-mbus";
> -			reg = <0x01c62000 0x1000>;
> -			clocks = <&ccu CLK_MBUS>;
> +			/* compatible is in per SoC .dtsi file */
> +			reg = <0x01c62000 0x1000>,
> +			      <0x01c63000 0x1000>;
> +			reg-names = "mbus", "dram";
> +			clocks = <&ccu CLK_MBUS>,
> +				 <&ccu CLK_DRAM>,
> +				 <&ccu CLK_BUS_DRAM>;
> +			clock-names = "mbus", "dram", "bus";
>  			#address-cells = <1>;
>  			#size-cells = <1>;
>  			dma-ranges = <0x00000000 0x40000000 0xc0000000>;
> diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h5.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-h5.dtsi
> index 578a63dedf46..35d5d238e313 100644
> --- a/arch/arm64/boot/dts/allwinner/sun50i-h5.dtsi
> +++ b/arch/arm64/boot/dts/allwinner/sun50i-h5.dtsi
> @@ -233,6 +233,10 @@ &display_clocks {
>  	compatible = "allwinner,sun50i-h5-de2-clk";
>  };
>  
> +&mbus {
> +	compatible = "allwinner,sun50i-h5-mbus";
> +};
> +
>  &mmc0 {
>  	compatible = "allwinner,sun50i-h5-mmc",
>  		     "allwinner,sun50i-a64-mmc";
> 

Reviewed-by: Chanwoo Choi <cw00.choi@...sung.com>

-- 
Best Regards,
Chanwoo Choi
Samsung Electronics