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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-65bad19be01sm2447598a12.3.2026.02.17.02.59.10 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 17 Feb 2026 02:59:12 -0800 (PST) Message-ID: Date: Tue, 17 Feb 2026 11:59:10 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 3/5] arm64: dts: qcom: milos: Add WCN6750 WiFi node To: Dmitry Baryshkov Cc: Luca Weiss , Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Alexander Koskovich , Jeff Johnson , ~postmarketos/upstreaming@lists.sr.ht, phone-devel@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org References: <20260116-milos-fp6-bt-wifi-v1-0-27b4fbb77e9c@fairphone.com> <20260116-milos-fp6-bt-wifi-v1-3-27b4fbb77e9c@fairphone.com> <5fe80f4a-ef5c-4008-88e2-60ad1f8c2a18@oss.qualcomm.com> <4u6yutdbpmsaz5t2rzjtttvvbf5onkckkdwxqma672pqnkre5w@zagnzqwl7ju5> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <4u6yutdbpmsaz5t2rzjtttvvbf5onkckkdwxqma672pqnkre5w@zagnzqwl7ju5> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMjE3MDA5MCBTYWx0ZWRfX30j0XprNYOZy n/H842KtyX+eQjQtMCcqA2PEiqMb1psQ+4t35g1UKfWJS7dJCrU906CZqUOVSlxA6IiDnkZEAA+ BuQHWW2ibNUZHcmbPQWr7naC2lO0rUx3ETD27+EkJxEuOf45kDeYAwKa/vcY3XEWGh4nOX47c1n GVkDWF3r/B5x/d5SLcNtcTnwdzr/NXRUnwpoAevoEDrAISFqXEI5kYC5iQ/U7lb3AbaZ9yhL2cy PKmLUqBdKsKO3SiiqX3KWpto1Sf8IgRtYd50k8WOsa727UT8KxKH8NhSW8BMLftcOuEptt8oVSh 2387fatkYd9GDD0SYW4kHEy2ZCFrAe4cJZw+9v5+G4kXWO8HjknrT8kC7/aHRZ6Sw5zq6tMI088 M/4wn2qt0e9CtCucyH1JwaorqQRNHVl+Q+52cYNWmM3lG1fKeg8a+h6fk+Ay0NJAG/sXchiwkQS ewx+HhCI851bpm/soNw== X-Authority-Analysis: v=2.4 cv=b+G/I9Gx c=1 sm=1 tr=0 ts=69944a02 cx=c_pps a=mPf7EqFMSY9/WdsSgAYMbA==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=HzLeVaNsDn8A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=Mpw57Om8IfrbqaoTuvik:22 a=GgsMoib0sEa3-_RKJdDe:22 a=6H0WHjuAAAAA:8 a=creFfYD69OIjy85eYnMA:9 a=QEXdDO2ut3YA:10 a=dawVfQjAaf238kedN5IG:22 a=Soq9LBFxuPC4vsCAQt-j:22 X-Proofpoint-GUID: MdHVQr_iVxuTCXdFoyritLroF8uK6tSp X-Proofpoint-ORIG-GUID: MdHVQr_iVxuTCXdFoyritLroF8uK6tSp X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-02-17_01,2026-02-16_04,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 lowpriorityscore=0 priorityscore=1501 malwarescore=0 suspectscore=0 bulkscore=0 impostorscore=0 adultscore=0 phishscore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2601150000 definitions=main-2602170090 On 2/13/26 3:31 PM, Dmitry Baryshkov wrote: > On Tue, Jan 20, 2026 at 03:39:44PM +0100, Konrad Dybcio wrote: >> On 1/16/26 3:50 PM, Luca Weiss wrote: >>> Add a node for the WCN6750 WiFi found with the Milos SoC. >>> >>> Signed-off-by: Luca Weiss >>> --- >>> arch/arm64/boot/dts/qcom/milos.dtsi | 46 +++++++++++++++++++++++++++++++++++++ >>> 1 file changed, 46 insertions(+) >>> >>> diff --git a/arch/arm64/boot/dts/qcom/milos.dtsi b/arch/arm64/boot/dts/qcom/milos.dtsi >>> index 024e1c9992fe..80feb3e9d3e2 100644 >>> --- a/arch/arm64/boot/dts/qcom/milos.dtsi >>> +++ b/arch/arm64/boot/dts/qcom/milos.dtsi >>> @@ -2043,6 +2043,52 @@ gic_its: msi-controller@17140000 { >>> }; >>> }; >>> >>> + wifi: wifi@17110040 { >>> + compatible = "qcom,wcn6750-wifi"; >>> + reg = <0x0 0x17110040 0x0 0x0>; >> >> This reg doesn't.. sound.. very.. good.. >> >> The size being 0 is of course wrong, but perhaps more interestingly >> the base address is a register within the GIC.. >> >>> + iommus = <&apps_smmu 0x1400 0x1>; >> >> And this is a PCIe stream >> >> But I see kodiak has the exact same setup.. >> >> After digging a little into the driver, that 'reg' is apparently >> indeed consumed, as a base for PCI MSIs.. I feel like there should be >> some better way to express this.. non-everyday setup > > I wonder, why are we using it directly instead of relying on GIC? I > guess it is because we need to map MSI registers over the PCIe IOMMU and > then let the other side write to them. How is it being handled in the > normal PCIe case? Looking at the recent r3g2 patches with the second switch enabled on PCIe1, it seems not to be an issue there Konrad