linux-kernel - Re: [RFC PATCH 8/8] arm64: dts: ti: use 'freq-table' in UFS node

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Date:   Mon, 21 Feb 2022 07:13:40 -0600
From:   Nishanth Menon <nm@...com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
CC:     Alim Akhtar <alim.akhtar@...sung.com>,
        Avri Altman <avri.altman@....com>,
        Rob Herring <robh+dt@...nel.org>,
        Wei Xu <xuwei5@...ilicon.com>, Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Vignesh Raghavendra <vigneshr@...com>,
        Tero Kristo <kristo@...nel.org>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Chanho Park <chanho61.park@...sung.com>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Jan Kotas <jank@...ence.com>, <linux-scsi@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-samsung-soc@...r.kernel.org>,
        <linux-arm-msm@...r.kernel.org>
Subject: Re: [RFC PATCH 8/8] arm64: dts: ti: use 'freq-table' in UFS node

On 19:45-20220219, Krzysztof Kozlowski wrote:
> The 'freq-table-hz' property is deprecated by UFS bindings.
> The uint32-array requires also element to be passed within one <> block.
> 
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
> ---
>  arch/arm64/boot/dts/ti/k3-j721e-main.dtsi | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/boot/dts/ti/k3-j721e-main.dtsi b/arch/arm64/boot/dts/ti/k3-j721e-main.dtsi
> index 599861259a30..c3afef0321ae 100644
> --- a/arch/arm64/boot/dts/ti/k3-j721e-main.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-j721e-main.dtsi
> @@ -1257,7 +1257,9 @@ ufs@...4000 {
>  			compatible = "cdns,ufshc-m31-16nm", "jedec,ufs-2.0";
>  			reg = <0x0 0x4e84000 0x0 0x10000>;
>  			interrupts = <GIC_SPI 17 IRQ_TYPE_LEVEL_HIGH>;
> -			freq-table-hz = <250000000 250000000>, <19200000 19200000>, <19200000 19200000>;
> +			freq-table = <250000000 250000000

<min max> is much more readable and less error prone in case of a large
set.

> +				      19200000 19200000
> +				      19200000 19200000>;

are you sure the removal of the tuple adds value?

>  			clocks = <&k3_clks 277 0>, <&k3_clks 277 1>, <&k3_clks 277 1>;
>  			clock-names = "core_clk", "phy_clk", "ref_clk";
>  			dma-coherent;
> -- 
> 2.32.0
> 

-- 
Regards,
Nishanth Menon
Key (0xDDB5849D1736249D)/Fingerprint: F8A2 8693 54EB 8232 17A3  1A34 DDB5 849D 1736 249D