Re: [PATCH 8/9] arm64: dts: qcom: add IPQ5210 SoC and rdp504 board support

[Konrad Dybcio]

On 3/16/26 10:03 AM, Kathiravan Thirumoorthy wrote:
> 
> On 3/13/2026 6:18 PM, Konrad Dybcio wrote:
>> On 3/11/26 10:45 AM, Kathiravan Thirumoorthy wrote:
>>> Add initial device tree support for the Qualcomm IPQ5210 SoC and
>>> rdp504 board.
>>>
>>> Signed-off-by: Kathiravan Thirumoorthy <kathiravan.thirumoorthy@xxxxxxxxxxxxxxxx>
>>> ---

[...]

>>> +    firmware {
>>> +        optee {
>>> +            compatible = "linaro,optee-tz";
>>> +            method = "smc";
>>> +        };
>>> +
>>> +        scm {
>>> +            compatible = "qcom,scm-ipq5210", "qcom,scm";
>>> +        };
>> OP-TEE *and* SCM? What does the former do?
> 
> For OP-TEE, we have use cases like getting the random numbers, remoteproc PAS and few others.
> 
> For SCM, setting the download mode is one typical example where OP-TEE doesn't come into picture.
> 
> Please let me know if this helps.

I think it does, but it's odd that OPTEE wouldn't handle both

fwiw +Sumit is poking at OSS firmware for other platforms and may be
interested

Konrad