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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b8fc735e587sm440840766b.2.2026.02.18.04.26.51 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 18 Feb 2026 04:26:52 -0800 (PST) Message-ID: <193d236b-864b-45bd-b0a9-6efbdccf6db9@oss.qualcomm.com> Date: Wed, 18 Feb 2026 13:26:49 +0100 Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH net-next v3 1/3] dt-bindings: sram: qcom,imem: Allow modem-tables subnode To: Krzysztof Kozlowski , Konrad Dybcio Cc: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Bjorn Andersson , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Alex Elder , Marijn Suijten , linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org References: <20260217-topic-ipa_imem-v3-0-d6d8ed1dfb67@oss.qualcomm.com> <20260217-topic-ipa_imem-v3-1-d6d8ed1dfb67@oss.qualcomm.com> <20260217-godlike-silent-owl-0a8487@quoll> <36f0a71c-a8b7-4aaa-81c3-1945b268c57f@oss.qualcomm.com> <0bfcb292-4e49-4047-b631-dd3029b43f1c@kernel.org> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <0bfcb292-4e49-4047-b631-dd3029b43f1c@kernel.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Authority-Analysis: v=2.4 cv=K60v3iWI c=1 sm=1 tr=0 ts=6995b00e cx=c_pps a=HLyN3IcIa5EE8TELMZ618Q==: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=gEfo2CItAAAA:8 a=EUspDBNiAAAA:8 a=RnnwUKbM9eazD08LpS8A:9 a=QEXdDO2ut3YA:10 a=bTQJ7kPSJx9SKPbeHEYW:22 a=sptkURWiP4Gy88Gu7hUp:22 X-Proofpoint-GUID: LIx92OLlnBc9pcdvPXJRmYZ0KqZSuFMi X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMjE4MDEwOSBTYWx0ZWRfXyg8znqo7GRHr aIERwTaM+tmFBLe2SK5RsfE0++6ZPwhVExcpj84JQE4/wR8TJNGd7TYoVfCWou17LnsPpbJGpXV VqUR8p4Ndq5j9qNjyN9ZIN77HjMkYNr7CxkpkYYMBEob4ipONpQNaPHdzaWgITzlkbSCTd8hw+X RLF1PrtDTxo4VOnh6XE8FZdeK2gWbh1/4Nu0DDaqUkWa02xSZApGhdg9RJhTZrfjq1sAN3AvbAH yjbC+3KHo8IjHWnw3UMGNk9CkTQ0wbmTLVy1l1WOpTzy1kmdhxr/nJYFYsitVVbYMkiG4AEvJw1 aiFUL+vkZaZVE719ypuHGxLFQW0F0hFLlZc/7RjxAVtdnI6k0WCxVOzY7rDDNXkSl3qdC9d7Kxo Z8ECxAwwyIDJ0FVXb7DWrb3azEjujdaPLWy/y+7HKMBaJa5BL9D22mXVMHYyYZ3g07seuZjbYvn aFftTrNtWBgXClaCPlA== X-Proofpoint-ORIG-GUID: LIx92OLlnBc9pcdvPXJRmYZ0KqZSuFMi 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=2026-02-18_02,2026-02-16_04,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 lowpriorityscore=0 clxscore=1015 malwarescore=0 priorityscore=1501 spamscore=0 impostorscore=0 bulkscore=0 suspectscore=0 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2601150000 definitions=main-2602180109 On 18-Feb-26 12:56, Krzysztof Kozlowski wrote: > On 18/02/2026 12:05, Konrad Dybcio wrote: >> On 2/17/26 9:25 PM, Krzysztof Kozlowski wrote: >>> On Tue, Feb 17, 2026 at 02:30:31PM +0100, Konrad Dybcio wrote: >>>> From: Konrad Dybcio >>>> >>>> The IP Accelerator hardware/firmware owns a sizeable region within the >>>> IMEM, named 'modem-tables', containing various packet processing >>>> configuration data. >>>> >>>> It's not actually accessed by the OS, although we have to IOMMU-map it >>>> with the IPA device, so that presumably the firmware can act upon it. >>>> >>>> Allow it as a subnode of IMEM. >>> >>> You do not have compatible, so rely on the node name as ABI, which is >>> fine in general but... I do not see usage of it in the driver. Why do >>> you need to define modem-tables child then? >> >> I don't really *need* the node name to be an ABI. However, the current >> binding for IMEM only allows a named "pil-reloc@.." subnode (which is >> consumed via of_find_compatible_node() in the remoteproc subsystem) so I >> figured the intention was to keep the list of allowed subnodes strictly >> moderated >> >> If you'd prefer a blanket pattern declaration with say '^[a-z]@[0-9a-z]+$' >> with just a reg requirement inside, I'm fine with that too > > No, the problem is that you do not use the ABI here at all. Neither > would you use the blanket pattern, so my question stays: why adding ABI > which is not used? The subnode I'm trying to introduce is going to be consumed (via a phandle reference) from the IPA node, as done by the remaining 2 patches in this series. I would much prefer not to touch this binding file, but there's an additionalProperties: false and just adding it as-is results in a: arch/arm64/boot/dts/qcom/sc7280-idp.dtb: sram@146a5000: 'modem-tables@1234' does not match any of the regexes: '^pil-reloc@[0-9a-f]+$', 'pinctrl-[0-9]+' from schema $id: http://devicetree.org/schemas/sram/qcom,imem.yaml# Konrad > > The pil-reloc is being used, as you pointed out. > > Best regards, > Krzysztof