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Message-ID: <20250722161103.3938-3-quic_rdwivedi@quicinc.com>
Date: Tue, 22 Jul 2025 21:41:02 +0530
From: Ram Kumar Dwivedi <quic_rdwivedi@...cinc.com>
To: <mani@...nel.org>, <alim.akhtar@...sung.com>, <avri.altman@....com>,
        <bvanassche@....org>, <robh@...nel.org>, <krzk+dt@...nel.org>,
        <conor+dt@...nel.org>, <andersson@...nel.org>,
        <konradybcio@...nel.org>, <James.Bottomley@...senPartnership.com>,
        <martin.petersen@...cle.com>, <agross@...nel.org>
CC: <linux-arm-msm@...r.kernel.org>, <linux-scsi@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH 2/3] arm64: dts: qcom: sa8155: Add gear and rate limit properties to UFS

Add optional limit-hs-gear and limit-rate properties to the UFS node to
support automotive use cases that require limiting the maximum Tx/Rx HS
gear and rate due to hardware constraints.

Signed-off-by: Ram Kumar Dwivedi <quic_rdwivedi@...cinc.com>
---
 arch/arm64/boot/dts/qcom/sm8150.dtsi | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sm8150.dtsi b/arch/arm64/boot/dts/qcom/sm8150.dtsi
index b5494bcf5cff..87e8b60b3b2d 100644
--- a/arch/arm64/boot/dts/qcom/sm8150.dtsi
+++ b/arch/arm64/boot/dts/qcom/sm8150.dtsi
@@ -2082,6 +2082,9 @@ ufs_mem_hc: ufshc@...4000 {
 			resets = <&gcc GCC_UFS_PHY_BCR>;
 			reset-names = "rst";
 
+			limit-hs-gear = <3>;
+			limit-rate = <1>;
+
 			iommus = <&apps_smmu 0x300 0>;
 
 			clock-names =
-- 
2.50.1


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