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

From: Mukesh Ojha

Date: Sun Sep 20 2026 - 03:55:13 EST


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.

--
-Mukesh Ojha