linux-kernel - Re: [PATCH 1/2] arm64: dts: ti: k3-j784s4-main: Add DT node for UFS

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Date:   Tue, 25 Jul 2023 16:06:47 +0530
From:   Vignesh Raghavendra <vigneshr@...com>
To:     Udit Kumar <u-kumar1@...com>, <nm@...com>, <kristo@...nel.org>,
        <robh+dt@...nel.org>, <linux-arm-kernel@...ts.infradead.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     Chai Wenle <Wenle.Chai@...driver.com>
Subject: Re: [PATCH 1/2] arm64: dts: ti: k3-j784s4-main: Add DT node for UFS

Hi Udit

Minor nits inline:

On 25/07/23 11:08, Udit Kumar wrote:
> This patch adds UFS support present in J784S4 SOC.

"This patch" perhaps is redundant

> 
> UFS is documentend in J784S4 TRM[1]

s/documentend/documented

> Section 12.3.7 'Universal Flash Storage (UFS) Interface'
> 
> [1] http://www.ti.com/lit/zip/spruj52
> 
> Cc: Chai Wenle <Wenle.Chai@...driver.com>
> Signed-off-by: Udit Kumar <u-kumar1@...com>
> ---
>  arch/arm64/boot/dts/ti/k3-j784s4-main.dtsi | 24 ++++++++++++++++++++++
>  1 file changed, 24 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/ti/k3-j784s4-main.dtsi b/arch/arm64/boot/dts/ti/k3-j784s4-main.dtsi
> index 11f163e5cadf..f1db1ca5d6b1 100644
> --- a/arch/arm64/boot/dts/ti/k3-j784s4-main.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-j784s4-main.dtsi
> @@ -1370,6 +1370,30 @@ main_spi7: spi@...0000 {
>  		status = "disabled";
>  	};
>  
> +	ufs_wrapper: ufs-wrapper@...0000 {
> +		compatible = "ti,j721e-ufs";
> +		reg = <0x0 0x4e80000 0x0 0x100>;

Inline with rest of the file please use 0x00

		reg = <0x00 0x4e80000 0x00 0x100>;

> +		power-domains = <&k3_pds 387 TI_SCI_PD_EXCLUSIVE>;
> +		clocks = <&k3_clks 387 3>;
> +		assigned-clocks = <&k3_clks 387 3>;
> +		assigned-clock-parents = <&k3_clks 387 6>;
> +		ranges;
> +		#address-cells = <2>;
> +		#size-cells = <2>;
> +		status = "disabled";
> +
> +		ufs@...4000 {
> +			compatible = "cdns,ufshc-m31-16nm", "jedec,ufs-2.0";
> +			reg = <0x0 0x4e84000 0x0 0x10000>;

Same here or perhaps use ranges in the parent node?

> +			interrupts = <GIC_SPI 17 IRQ_TYPE_LEVEL_HIGH>;
> +			freq-table-hz = <250000000 250000000>, <19200000 19200000>,
> +					<19200000 19200000>;
> +			clocks = <&k3_clks 387 1>, <&k3_clks 387 3>, <&k3_clks 387 3>;
> +			clock-names = "core_clk", "phy_clk", "ref_clk";
> +			dma-coherent;
> +		};
> +	};
> +
>  	main_r5fss0: r5fss@...0000 {
>  		compatible = "ti,j721s2-r5fss";
>  		ti,cluster-mode = <1>;

-- 
Regards
Vignesh