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Tue, 11 Nov 2025 00:30:03 -0800 (PST) X-Google-Smtp-Source: AGHT+IEuhb2GGhvE8OZGJfSKk9DDBi2oTQ4tUBBW8s8pA3ACUuriomTebsLbkZBpIa15zbib8ASJvw== X-Received: by 2002:a05:6a20:430c:b0:342:a261:e2c9 with SMTP id adf61e73a8af0-3579a57ad80mr3102772637.8.1762849802611; Tue, 11 Nov 2025 00:30:02 -0800 (PST) Received: from [10.151.37.217] ([202.46.23.19]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-7b0c953e791sm14749002b3a.7.2025.11.11.00.29.57 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 11 Nov 2025 00:30:02 -0800 (PST) Message-ID: <5b1f8204-1f49-4061-aa4e-f6dfe5ae2a0a@oss.qualcomm.com> Date: Tue, 11 Nov 2025 13:59:55 +0530 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 1/2] dt-bindings: soc: qcom: Add qcom,kaanapali-imem compatible To: Bjorn Andersson , Konrad Dybcio Cc: Krzysztof Kozlowski , Jingyi Wang , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Konrad Dybcio , Robert Marko , Das Srinagesh , aiqun.yu@oss.qualcomm.com, tingwei.zhang@oss.qualcomm.com, trilok.soni@oss.qualcomm.com, yijie.yang@oss.qualcomm.com, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <20251102-knp-soc-binding-v3-0-11255ec4a535@oss.qualcomm.com> <20251102-knp-soc-binding-v3-1-11255ec4a535@oss.qualcomm.com> <20251104-glaring-rebel-pillbug-a467ca@kuoka> <790ca394-cee2-412b-97d8-c6416b843010@oss.qualcomm.com> <9ee07db9-508e-4c08-8f79-6ccfd9b646ab@oss.qualcomm.com> <6af33c1b-5b95-4efc-b429-5bfb9ee7caeb@kernel.org> <8cf870a8-706d-4514-a87a-a69b64521ab5@oss.qualcomm.com> <9d80b581-5d3f-4b95-91e7-c73c113b0976@oss.qualcomm.com> Content-Language: en-US From: Kathiravan Thirumoorthy In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMTExMDA2NiBTYWx0ZWRfX/d2vsDq7f2VI OSonoGeAmscfBJKuVFN/urv4j2DeiytbFHivhEtHmgYGpr36/NHgsZjYyiSCQpvo6GHdCM0wsra XDHcjK6kKYJnwGJokS1YihCbN6ZLWOI5FcZpS3JxEQt5G1DI0vftnz8eyDX3Sd1aKwKZE8sDHzH iyvVQg4986blvc6/BX5iytCYTYsdd90oaaJI36mGI5af7pZlOzkhL1fjqPY9+pVjVDNXUn8ePVf Ah/PTtN5/9Ymrc6lsxTkk3Fi817EkQ9NgHyn+JnggzrF2rCLHx/GqWdLinyLl5ero4DKs7f5uKa q9Y++vuCN0TJiEEjd6MpItWfPaIOl2aQC1tVOv6eRnIc6PlKExqdhYBVWEPvb1R9zmLcGv+fcED 3l0JLlrIcVolP6HK40iQh4vZ60IJHw== X-Proofpoint-GUID: GrE4UI9yxIaJ1x7oY0Wwyt4CMQSABrEr X-Proofpoint-ORIG-GUID: GrE4UI9yxIaJ1x7oY0Wwyt4CMQSABrEr X-Authority-Analysis: v=2.4 cv=CeIFJbrl c=1 sm=1 tr=0 ts=6912f40c cx=c_pps a=Oh5Dbbf/trHjhBongsHeRQ==:117 a=j4ogTh8yFefVWWEFDRgCtg==:17 a=IkcTkHD0fZMA:10 a=6UeiqGixMTsA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=OHlQOMkkIfFZTL2-Co4A:9 a=QEXdDO2ut3YA:10 a=_Vgx9l1VpLgwpw_dHYaR:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2025-11-11_01,2025-11-11_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 priorityscore=1501 lowpriorityscore=0 bulkscore=0 impostorscore=0 clxscore=1015 phishscore=0 malwarescore=0 spamscore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2510240001 definitions=main-2511110066 On 11/7/2025 1:54 AM, Bjorn Andersson wrote: > On Tue, Nov 04, 2025 at 03:58:27PM +0100, Konrad Dybcio wrote: >> On 11/4/25 3:52 PM, Krzysztof Kozlowski wrote: >>> On 04/11/2025 15:38, Konrad Dybcio wrote: >>>> On 11/4/25 3:37 PM, Krzysztof Kozlowski wrote: >>>>> On 04/11/2025 15:35, Konrad Dybcio wrote: >>>>>> On 11/4/25 3:26 PM, Krzysztof Kozlowski wrote: >>>>>>> This I got, but nothing here explains why you need generic compatible. >>>>>>> To re-iterate: there was no generic compatible before, now there is. >>>>>>> Writing bindings and numerous reviews from DT maintainers ask not to use >>>>>>> generic compatibles. >>>>>> OK so let's not worry about a generic compatible. IMEM exists since >>>>>> MSM8974 and it only had major hw updates with SM8550. They don't >>>>>> impact the software interface though, so qcom,msm8974-imem is OK. >>>>>> >>>>>> There's a separate control/status register address space for each >>>>>> instance of this IP (usually far apart from the actual SRAM pool), >>>>>> which Linux doesn't have to care about. >>>>> Just use qcom,kaanapali-imem - that's the first device here without syscons. >>>> So we don't want to move the existing ones over? >>> This was never discussed and this patch did not do it. You cannot move >>> them, that's ABI. >> I see, I implicitly assumed this would be a sweeping change. >> >> So should the Kaanapali submitters simply send a version of this >> patch with: >> >> - oneOf: >> - const: qcom,kaanapali-imem >> - items: >> # existing big list >> >> ? > We have 33 cases of "this is just a generic Qualcomm IMEM block", could > we just make it "qcom,imem" until there's actually a sign that it's not > a platform-independent block? Any conclusion / further feedback on this would be helpful to move things forward. Thanks in advance. > > Regards, > Bjorn > >> I'm not a huge fan of using kaanapali as the fallback-going-forward >> since it's literally the newest platform on the shelves (or perhaps >> not even on the shelves yet..) so it's going to look funny when >> someone comes up with support for another 2013 soc.. but perhaps >> that's just how things are supposed to be >> >> Konrad