Re: [PATCH] arm64: dts: qcom: ipq5424: Add reserved memory for TF-A

[Kathiravan Thirumoorthy <kathiravan.thirumoorthy@oss.qualcomm.com>]

On 6/24/2025 6:57 PM, Konrad Dybcio wrote:
> On 6/24/25 12:36 PM, Kathiravan Thirumoorthy wrote:
>> From: Vignesh Viswanathan <quic_viswanat@quicinc.com>
>>
>> IPQ5424 supports both TZ and TF-A as secure software options and various
>> DDR sizes. In most cases, TF-A or TZ is loaded at the same memory
>> location, but in the 256MB DDR configuration TF-A is loaded at a different
>> region.
>>
>> So, add the reserved memory node for TF-A and keep it disabled by default.
>> During bootup, U-Boot will detect which secure software is running and
>> enable or disable the node accordingly.
>>
>> Signed-off-by: Vignesh Viswanathan <quic_viswanat@quicinc.com>
>> Signed-off-by: Kathiravan Thirumoorthy <kathiravan.thirumoorthy@oss.qualcomm.com>
>> ---
> Can the said u-boot simply dynamically add the reservation then?

Yeah it could have been done in U-Boot itself but it wasn't. 256MB DDR 
configuration solution is already shipped out and the stock U-Boot 
enable this node to avoid the random issues.

>
> Konrad