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 5DCFE214A8B; Tue, 28 Oct 2025 16:46:01 +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=1761669963; cv=none; b=u/uziqwHewiUgd6iFQPvTJ+naYO6ZbBoN3QmSOyBtdajCvrEF926xcQjSlzI4aIfEt+cptDP9/D/VfCYBoSJq0t7e09AM9gozX4jb3wBygd84ZhZnhIXZMm17/pXTWQsdifA2xyQolbvzOQSq7W3oQDJk5AraxCcmj3QZHE4T3g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761669963; c=relaxed/simple; bh=JpR4fWG1ncChqciQyze+WbIz99pClPhkzB2UqDbdlZk=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=S95tZEZrTjrUsZkmciYRCLXlpryZcb4yt9wZpUIzrq2lcg53yN64aLLkBs77tix5ESBQqMgrmGnPusa0otMcRG1P4ImhZVMP9oDzZmfFUo4j2xe05QQC+bZqRTTAM3YIShwvUYyhda3o014Txi2KXEk4UXlkH1z5i9k1M5RaXe4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=aAP6pw92; 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="aAP6pw92" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D84B0C4CEFF; Tue, 28 Oct 2025 16:45:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1761669960; bh=JpR4fWG1ncChqciQyze+WbIz99pClPhkzB2UqDbdlZk=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=aAP6pw92T0ww/UGtctLdTIo1UcOVyJYixVWFEr6BwcxZETMjZZe0VL2ZArxj1LMjP bCzDgDOQJZy/7CobxLeLzw8bfIWxXZRztx8U24B8+mi0tHFV+dCWQ6RxcGPpZLQzBi 3311sU5y3lrklp7/7nx8VDWk254cADB3qeqUDgMrVPzYuFZNlCdIR5+md4fTEM8vRK vvrzEUzx3X4mdJVGTRNw3YCkMbIiMm+798t3XpCGs4SM+WU/N+q81WrtYHmf67SeEL USk/8uO/Ob/ZsHFTQzFkYtQeAGEPeOjgwUg2ecWoF+Sk0GbWUzdj2sgtfQQmtgprQV cZ1/OoMPrsmWg== Message-ID: <8dd2a196-e15b-4b1b-bebe-fcb6445d427b@kernel.org> Date: Tue, 28 Oct 2025 17:45:56 +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 v3] watchdog: Add driver for Gunyah Watchdog To: Pavan Kondeti , Guenter Roeck Cc: hrishabh.rajput@oss.qualcomm.com, Bjorn Andersson , Konrad Dybcio , Wim Van Sebroeck , Rob Herring , Krzysztof Kozlowski , Conor Dooley , linux-arm-msm@vger.kernel.org, linux-watchdog@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Neil Armstrong References: <20251028-gunyah_watchdog-v3-1-e6d1ea438b1d@oss.qualcomm.com> <4659e69b-907a-49ba-8eb6-ac17232a5219@roeck-us.net> <3e4fd54c-90fb-4b15-a9cd-a2d11b0aa952@quicinc.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 28/10/2025 17:40, Pavan Kondeti wrote: >> Every other driver which supports devicetree has an .of_match_table >> which triggers device instantiation. If the Gunyah watchdog can for >> some reason not use that approach, its devicetree description should >> be fixed. Instantiating the device from its init function because its >> devicetree description is bad or missing is just wrong. It is even more >> wrong to try to contact the hardware or embedded controller to figure out >> if the device is there. This can have all kinds of negative impact on other >> hardware. >> > The Gunyah WDT node gets overlayed by bootloader. We see that this We absolutely don't care what your bootloader gives as overlay. You should have first define the bindings then add such stuff. You cannot use any argument of your bootloader in such case. You decided to do it ignoring or not even asking community, so you have to live now with all the consequences of it. Including rewriting completely bootloader. > overlay is failing w/ upstream device tree since the overlay has > references to downstream code. Please see [1]. Hence we are trying to > register the platform device dynamically. Best regards, Krzysztof