Re: [PATCH v11 1/2] arm64: dts: qcom: qcm6490-idp/qcs6490-rb3gen2: Keep wlan_ce_mem and drop redundant wifi memory-region

[Konrad Dybcio]

On 9/20/26 9:54 AM, Mukesh Ojha wrote:
> On Tue, Aug 25, 2026 at 11:32:49AM +0200, Konrad Dybcio wrote:
>> On 8/3/26 2:10 PM, Mukesh Ojha wrote:
>>> The reserved region wlan_ce_mem is device memory used by the WCN6750
>>> firmware. Deleting it in qcm6490-idp.dts and qcs6490-rb3gen2.dts is
>>> erroneous — the region must remain present regardless of whether the
>>> underlying OS uses it — so drop the /delete-node/ &wlan_ce_mem; from
>>> both board files.
>>
>> But it starts below 0x8000_0000 where RAM starts, so it shouldn't really
>> matter, no?
> 
> This region is used by the WLAN driver when Linux is at EL2, and similar to
> Kodiak Chrome, Kodiak IOT also needs to use it.

Right, it's a sneaky iommu_map

Reviewed-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxxxxxxxx>

Konrad