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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b8fc73f7c24sm448899366b.30.2026.02.18.03.05.03 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 18 Feb 2026 03:05:04 -0800 (PST) Message-ID: <36f0a71c-a8b7-4aaa-81c3-1945b268c57f@oss.qualcomm.com> Date: Wed, 18 Feb 2026 12:05:02 +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 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> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20260217-godlike-silent-owl-0a8487@quoll> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-GUID: Gsy_c9DzMlTkZvvvFnyppcrUgwLubMCP X-Authority-Analysis: v=2.4 cv=R7oO2NRX c=1 sm=1 tr=0 ts=69959ce2 cx=c_pps a=qKBjSQ1v91RyAK45QCPf5w==: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=EUspDBNiAAAA:8 a=rVRdtUZ5si-n9qu6NxkA:9 a=QEXdDO2ut3YA:10 a=NFOGd7dJGGMPyQGDc5-O:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMjE4MDA5OCBTYWx0ZWRfX+wJGrREkAi2C +rNQTG3PlFpBfCZ3m9wdlpnEAGzU3EDVH3PDM8XluSKB/MMl2Ux2rxQMTh2uOhhh+OtoRzEN5+p SscS5KslCJeVDll5XiTXwh2hbPYrBTylVSgr1etWZvqt6PcxIco0/R+sHtOEYeYSfvhOF6GerVc 3iR8J5EMjaEUrgyTiak/0/JvdomVZg1ZD8HupmLamzWDhFsnBnB1LeS4yop/ogsRb6zzm1T+w4e piqYfW1cpBl5fqjKdgU+iUJ7piuajxPbWmq4tK6HCc1zIaheXjecDvLITmOAf+kTZPWDvoeVNQe 17KSrN3Y2n7udYVFsjM+joAWABh8l0xKOvsD8Eli0rCD7lQGa9RRKA5++kA741wOU4uJEYJ5CX4 Ol1PjiCIb+Yld5nmBgD293dsy/Bazzxo/ahCISEtX/4P82IDuyFPc0RUJ2LgruTWqgY6gnkEAur e3SZZ3mSU3O32IiAxBg== X-Proofpoint-ORIG-GUID: Gsy_c9DzMlTkZvvvFnyppcrUgwLubMCP 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_01,2026-02-16_04,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 adultscore=0 priorityscore=1501 impostorscore=0 phishscore=0 lowpriorityscore=0 spamscore=0 suspectscore=0 bulkscore=0 malwarescore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2601150000 definitions=main-2602180098 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 Konrad