[PATCH 2/3] arm64: dts: qcom: sa8155: Add gear and rate limit properties to UFS

Ram Kumar Dwivedi
2025-07-22T16:11:40Z

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@quicinc.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@1d84000 {
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