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

Ram Kumar Dwivedi
2025-07-24T07:36:29Z

On 23-Jul-25 12:25 AM, Dmitry Baryshkov wrote:
> On Tue, Jul 22, 2025 at 09:41:02PM +0530, Ram Kumar Dwivedi wrote:
>> 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.
>
>
> If they are optional and they are for automotive, then why are you
> adding them to the SM8150 DTSi file, enforcing them for all SM8150
> targets?
>
Hi Dmitry,

I have moved them to board specific file sa8155p.dtsi in latest patchset.

Thanks,
Ram.

>>
>> 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
>>
>