Re: [PATCH 5/6] arm64: dts: qcom: lemans: Add support for TSCSS node

[Konrad Dybcio]

On 9/1/26 8:41 AM, Imran Shaik wrote:
> 
> 
> On 27-07-2026 08:14 pm, Konrad Dybcio wrote:
>> On 7/27/26 4:11 PM, Imran Shaik wrote:
>>> Add Timestamp Counter Subsystem (TSCSS) node support on Qualcomm Lemans
>>> SoCs.
>>>
>>> Signed-off-by: Imran Shaik <imran.shaik@xxxxxxxxxxxxxxxx>
>>> ---
>>>   arch/arm64/boot/dts/qcom/lemans.dtsi | 11 +++++++++++
>>>   1 file changed, 11 insertions(+)
>>>
>>> diff --git a/arch/arm64/boot/dts/qcom/lemans.dtsi b/arch/arm64/boot/dts/qcom/lemans.dtsi
>>> index 3b0539e27b5192582e0bc9ea248f1c0382e05030..e225292a1e41a5a313aca188ca04bb12474995e8 100644
>>> --- a/arch/arm64/boot/dts/qcom/lemans.dtsi
>>> +++ b/arch/arm64/boot/dts/qcom/lemans.dtsi
>>> @@ -3023,6 +3023,17 @@ pcie1_phy: phy@1c14000 {
>>>               status = "disabled";
>>>           };
>>>   +        tscss@1c80000 {
>>> +            compatible = "qcom,lemans-tscss";
>>> +            reg = <0x0 0x01c80000 0x0 0x2000>;
>>> +            reg-names = "tsc";
>>> +            clocks = <&gcc GCC_TSCSS_AHB_CLK>,
>>> +                 <&gcc GCC_TSCSS_GLOBAL_CNTR_CLK>;
>>> +            clock-names = "ahb", "cntr";
>>> +            assigned-clocks = <&gcc GCC_TSCSS_GLOBAL_CNTR_CLK>;
>>> +            assigned-clock-rates = <15625000>;
>>
>> I'm guessing this will only ever require a single rate - do we
>> need power-domains pointing to one of the RPMHPDs and a
>> required-opps reference to match?
>>
> 
> The power-domains/required-opps are not really required here, as this
> clock's rate is at the lowest corner on the CX rail, which is always
> kept ON.

The clock plan calls for SVS_L1, the RPMHPD node also defines SVS,
LOW_SVS and MIN_SVS below it

Konrad