linux-kernel - Re: [PATCH 8/8] ARM: dts: msm: Use Operation Points V2 for UFS on SM8650

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Message-ID: <5b419c6a-ba22-41d3-bd5e-869d422f3c5d@kernel.org>
Date: Thu, 16 Jan 2025 10:22:47 +0100
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Ziqi Chen <quic_ziqichen@...cinc.com>, quic_cang@...cinc.com,
 bvanassche@....org, mani@...nel.org, beanhuo@...ron.com,
 avri.altman@....com, junwoo80.lee@...sung.com, martin.petersen@...cle.com,
 quic_nguyenb@...cinc.com, quic_nitirawa@...cinc.com,
 quic_rampraka@...cinc.com
Cc: linux-scsi@...r.kernel.org, Bjorn Andersson <andersson@...nel.org>,
 Konrad Dybcio <konradybcio@...nel.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>,
 "open list:ARM/QUALCOMM SUPPORT" <linux-arm-msm@...r.kernel.org>,
 "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
 <devicetree@...r.kernel.org>, open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 8/8] ARM: dts: msm: Use Operation Points V2 for UFS on
 SM8650

On 16/01/2025 10:11, Ziqi Chen wrote:
> Use Operation Points V2 for UFS on SM8650 so that multi-level
> clock/gear scaling can be possible.
> 
> Co-developed-by: Can Guo <quic_cang@...cinc.com>
> Signed-off-by: Can Guo <quic_cang@...cinc.com>
> Signed-off-by: Ziqi Chen <quic_ziqichen@...cinc.com>

Please don't send downstream code directly, but fix it first. Actually -
rework it 100%.

Please use subject prefixes matching the subsystem. You can get them for
example with `git log --oneline -- DIRECTORY_OR_FILE` on the directory
your patch is touching. For bindings, the preferred subjects are
explained here:
https://www.kernel.org/doc/html/latest/devicetree/bindings/submitting-patches.html#i-for-patch-submitters

> ---
>  arch/arm64/boot/dts/qcom/sm8650.dtsi | 51 +++++++++++++++++++++++-----
>  1 file changed, 43 insertions(+), 8 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sm8650.dtsi b/arch/arm64/boot/dts/qcom/sm8650.dtsi
> index 01ac3769ffa6..5466f1217f64 100644
> --- a/arch/arm64/boot/dts/qcom/sm8650.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sm8650.dtsi
> @@ -2557,18 +2557,11 @@ ufs_mem_hc: ufs@...4000 {
>  				      "tx_lane0_sync_clk",
>  				      "rx_lane0_sync_clk",
>  				      "rx_lane1_sync_clk";
> -			freq-table-hz = <100000000 403000000>,
> -					<0 0>,
> -					<0 0>,
> -					<100000000 403000000>,
> -					<100000000 403000000>,
> -					<0 0>,
> -					<0 0>,
> -					<0 0>;
>  
>  			resets = <&gcc GCC_UFS_PHY_BCR>;
>  			reset-names = "rst";
>  
> +			operating-points-v2 = <&ufs_opp_table>;
>  			interconnects = <&aggre1_noc MASTER_UFS_MEM QCOM_ICC_TAG_ALWAYS
>  					 &mc_virt SLAVE_EBI1 QCOM_ICC_TAG_ALWAYS>,
>  					<&gem_noc MASTER_APPSS_PROC QCOM_ICC_TAG_ALWAYS
> @@ -2590,6 +2583,48 @@ &mc_virt SLAVE_EBI1 QCOM_ICC_TAG_ALWAYS>,
>  			#reset-cells = <1>;
>  
>  			status = "disabled";
> +
> +			ufs_opp_table: opp-table {
> +					   compatible = "operating-points-v2";


Messed indentation.

> +					   // LOW_SVS


Drop

> +					   opp-100000000 {
> +							   opp-hz = /bits/ 64 <100000000>,
> +									   /bits/ 64 <0>,

Messed alignment.

> +									   /bits/ 64 <0>,
> +									   /bits/ 64 <100000000>,
> +									   /bits/ 64 <0>,
> +									   /bits/ 64 <0>,
> +									   /bits/ 64 <0>,




Best regards,
Krzysztof