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 D4B96221FBD; Mon, 28 Jul 2025 11:52:30 +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=1753703551; cv=none; b=u9dLAm6sj8HDKv68zmRo/k6V+YuVXTK0gCfS2yh6wTa1+t+WZYhbQwqZWBMIMIxSD4H1FXFBsEopDytwnu0Km/RsSo9R+2NywZ4uVfIv8VO122Z2cvgTgD0wcMxMZsZg2GzeEJkVgFra6OS+EUgkS3AT+sAnunUJQq+MJHW7LUw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753703551; c=relaxed/simple; bh=n0J5JDKTqeiSZ0GT4nTGggSWytKhfzg7qr5qEFkmUNU=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=OKKuFYK07TiisyOcD0bUc8v4oyuO0egUykj0JQcPtnlJBeTfqlDM4cq/CD8PM6+zZCVkWPbfKz/WqCfm6Fvd+A/HG26f91pWoiollTqf01QlpRra0YDB7hU5TLDGCKEW1+Cni/DiNnit2uEq1We4D3UV6WRs7Br5UPwk8NCaL5E= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=oRbksmGa; 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="oRbksmGa" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3A6C3C4CEE7; Mon, 28 Jul 2025 11:52:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1753703550; bh=n0J5JDKTqeiSZ0GT4nTGggSWytKhfzg7qr5qEFkmUNU=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=oRbksmGapq9OYmr5bQZfbTnyAEOopzoaYZZzPo1tB1TP9ZpJZr+WnOqmdDUHOk5uh dOUb48Vfpe2P0N8Z0v1WaTEjVYl/YuwZXxZV4ZnZRvJvUxkdEx4oW61QXxqMLWyrKZ p2jM6GbxuMkfDU6sAuM03YhB2FwcBz9szLJtx2DCEFB++0YJh3gS0GJFvJTy18kuc8 n2c/wYxTRZUNhrtHb7DooKhp5tCbUaOVVfsK+w0OOAVFdNg4601pOBifTghfyjli7L dL6Lb75oBuNuDDgPO+JxEnUhc+y3DXIF1V2tN+g1L4ekaVGKqW7CMROGdkWQxAVyXN ShtXfvTTP+uLQ== Message-ID: Date: Mon, 28 Jul 2025 13:52:22 +0200 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 v13 07/10] firmware: psci: Implement vendor-specific resets as reboot-mode To: Dmitry Baryshkov Cc: Shivendra Pratap , Bartosz Golaszewski , Bjorn Andersson , Sebastian Reichel , Rob Herring , Sudeep Holla , Souvik Chakravarty , Krzysztof Kozlowski , Conor Dooley , Andy Yan , Mark Rutland , Lorenzo Pieralisi , Arnd Bergmann , Konrad Dybcio , cros-qcom-dts-watchers@chromium.org, Vinod Koul , Catalin Marinas , Will Deacon , Florian Fainelli , Mukesh Ojha , Stephen Boyd , Andre Draszik , linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, Elliot Berman , Srinivas Kandagatla References: <20250727-arm-psci-system_reset2-vendor-reboots-v13-0-6b8d23315898@oss.qualcomm.com> <20250727-arm-psci-system_reset2-vendor-reboots-v13-7-6b8d23315898@oss.qualcomm.com> <3gtlf5txxtioa5bvo6o467jupyoam4hjhm2mdiw5izv5vbl3tz@drndgp3tcrgo> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 28/07/2025 11:44, Dmitry Baryshkov wrote: > On Mon, Jul 28, 2025 at 06:53:14AM +0200, Krzysztof Kozlowski wrote: >> On 27/07/2025 18:24, Shivendra Pratap wrote: >>> + >>> +static int __init psci_init_vendor_reset(void) >>> +{ >>> + struct reboot_mode_driver *reboot; >>> + struct device_node *np; >>> + int ret; >>> + >>> + np = of_find_node_by_path("/psci/reboot-mode"); >> >> >> Why are you looking by full path, not by compatible? Is the ABI - above >> path - expressed anywhere? > > PSCI node is required to have a node name of psci, it doesn't have MMIO, This is true > so it resides in the root node This might be or not might be true. It is not defined by ABI. Anyway, you answered where the ABI would be documented, even though as I said it is not (/psci is not), but does not answer to first part: why you are not using compatibles which is always the preferred method? > and the reboot-mode is defined in the > previous patch. So, I'd assume, the path is defined. As I said, path is not. only psci/reboot-mode is. > Best regards, Krzysztof