From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B73F632F764; Tue, 4 Nov 2025 15:02:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762268553; cv=none; b=RCk3duZD3aZ0JTHVrFKd3sqLwUf/AVtqqbJR5OFiGJ5d04fZN1JLR4NgKcTd61GxvJ3UJHFvZS3zDu/Ho2bflkzNQQmT2VaQaQDSZm0RVPzdFPYDF2GVVFoe5+7zsAuWQGiBIBWBc9h63e+D8Fhv99jZJ1oNl3A93YOidzDhAA0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762268553; c=relaxed/simple; bh=MadU7Wv2vfsfU9rqxO2fTQYHoMOiOoJoCOKIT1cZTLU=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=K6QaFyHKzEgqnqmDpvLSo7uP5+wbz+x2vAqcUK4ixY4RiOPQ+D3S+HChsit9KuDSu+OAT4wa5zlsT0fRIinoSVSXUuG28m15MW9pwn6/kKprh8M4IlnydKB/SpaKvn4VYcTY9byrcKFF39Wzkt0K1TVdxZcVOimkfidpErw1AKE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=dgNfDg2f; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="dgNfDg2f" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A6DCBC4CEF7; Tue, 4 Nov 2025 15:02:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1762268553; bh=MadU7Wv2vfsfU9rqxO2fTQYHoMOiOoJoCOKIT1cZTLU=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=dgNfDg2fnXX0TptesTHXdDR4JOXlDtK18bxuZ7ClkWYJuSD4ljAzkBLuEgYZ3apdw evFm7tNP9CKuq0Wv3j1w5kvBaqWKFzyKQOczGvuK6glxKTzmYFjXDOsYBvf7ORqzzt oUNj5to1+jkhjT5lahTx/xFGw1Y/v2GNaTxxYgcJBSeWkGA0m98fCl0gI7H09U4Upn nLhsxOt9/T10PgNZFxOsYaAnfLTW1P/4Z0mbv8BEUvDN7lAQZ6h5VuZn9XP9hWNF2e lcSGuL1o3PTlc+bA/SnKE5IOpyCSHAcGHc5MCKWxvJeE2exkT01CLEelrIrbpeXMZS nwTyXpC5bhgRQ== Message-ID: <8f6189b0-24ac-4e24-9db5-c6f4d1bfb26a@kernel.org> Date: Tue, 4 Nov 2025 16:02:27 +0100 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: Konrad Dybcio , Jingyi Wang Cc: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Bjorn Andersson , 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> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 04/11/2025 15:58, 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 > > ? > > 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 Yes. Feel free to choose other fully compatible device as the fallback, like you mentioned in previous email, I proposed Kaanapali as the easiest. Best regards, Krzysztof