From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) (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 7F06A437859 for ; Mon, 6 Jul 2026 12:44:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.180.131 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783341895; cv=none; b=m3/j3whSJ6UL3F1rS/bmJwv0S+byUbizDrzlkFKP7Fqo0YhNbm3f9O5mMcmO2U1MfPGFAzEG6F99hjRYmlIa3rkeyU3BwCsYqcZyM9+0eQnJ4IwiRHQIYvzh50sTiMYF5qhA49mQDaLA90ouBEQQ5qB9Ivz99GCAVrh7qxWFeYk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783341895; c=relaxed/simple; bh=T44HwwZ1Q0M84+szoUbk3kJ64ZYTCT8dJmP8V7D67KU=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type:To:Cc; b=JULNj8ftBly/OWNdAprZDWORQnyJVq0UZyns0CgbzuWsHdUjtYwyN5G6j/t5iL+zy+x35/5GrkItL+xf4Gr6R+Su/3poP6n9VxtGFG5QbDkvY4SFCg1iCOl6OxbkC7daM3x4eaD6lJ9OEHCZjDywwGXncF88L2/xHyzusSKLC2I= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oss.qualcomm.com; spf=pass smtp.mailfrom=oss.qualcomm.com; dkim=pass (2048-bit key) header.d=qualcomm.com header.i=@qualcomm.com header.b=HvCI54HI; dkim=pass (2048-bit key) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com header.b=Rv/dLGV0; arc=none smtp.client-ip=205.220.180.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oss.qualcomm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=oss.qualcomm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=qualcomm.com header.i=@qualcomm.com header.b="HvCI54HI"; dkim=pass (2048-bit key) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com header.b="Rv/dLGV0" Received: from pps.filterd (m0279869.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 666AxMRW395417 for ; Mon, 6 Jul 2026 12:44:51 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=qualcomm.com; h= cc:content-transfer-encoding:content-type:date:from:message-id :mime-version:subject:to; s=qcppdkim1; bh=7VfOweZR0NvzKfVRW7ae+/ NW8JVQadN2E/hr03AdQ1s=; b=HvCI54HI6r2WAiPzYc0IXb/+6AOTqyJ2z1Q1Fs JNVh0m4mSZDL5o21i+i8bvQetkwOJ9innTRe2tVd0jSJc37bGA8wKzVwiVF7Bsus JGoJIYok+3i12s7ZIggCc4wl9NGo4bzR3lL/esbGOCJ8KivTwK6jzC/C+yIq0ptc itK7/HcU5/tl+x6Il+4JZw2JWuEe/WCA7wwlxVYvXsRwFcugg3Ha9ESH9WrPuh1A 7d0ghGcy9nZhbdPx14EYgydrDsLFurGwhz8rQmkCylU0mnNOl87XtCbGrOKFBcW3 VaMKUx2fmp4AnkeMMXbHq7C2lQVewhebNpZs8Kfu3Jnp69NA== Received: from mail-qk1-f199.google.com (mail-qk1-f199.google.com [209.85.222.199]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 4f89qpgqh4-1 (version=TLSv1.3 cipher=TLS_AES_128_GCM_SHA256 bits=128 verify=NOT) for ; Mon, 06 Jul 2026 12:44:50 +0000 (GMT) Received: by mail-qk1-f199.google.com with SMTP id af79cd13be357-92e68cb7a3eso552980785a.2 for ; Mon, 06 Jul 2026 05:44:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oss.qualcomm.com; s=google; t=1783341890; x=1783946690; darn=vger.kernel.org; h=cc:to:content-transfer-encoding:content-type:mime-version :message-id:date:subject:from:from:to:cc:subject:date:message-id :reply-to:content-type; bh=7VfOweZR0NvzKfVRW7ae+/NW8JVQadN2E/hr03AdQ1s=; b=Rv/dLGV0WULvhdf/N42KB3kaJmx9YhyU5WeEkYj5PeNzPIbW8RDWFeDKMYKtqvg9AK BsknjBbWel+R478IkumD5roLIAXY76TwSve27JPJAPo/NHNp899oIfxHdAqu2lw95iQO i460UVtZKoJfEliTUwJ0qA6Rv6iqBQot49mrTYsFsP8qsxVeQhNCJW1ttUDRfMQUdMLL N88HBtEgShThZq/W2Hi6xn0E/ElSfHuZAgFItSMCxr6Kyl/EtXLfObNmPWxTw93tjV2F HwLog3kiTEp0QhwH7dlqJAGqTt1D11P2ZhpqKV/pvBaUzFfMqNhT6JV85Gmba8hvDyc5 DyvQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1783341890; x=1783946690; h=cc:to:content-transfer-encoding:content-type:mime-version :message-id:date:subject:from:x-gm-gg:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to:content-type; bh=7VfOweZR0NvzKfVRW7ae+/NW8JVQadN2E/hr03AdQ1s=; b=f6mN1KlJg2IUaNEyU+wk5O5FYjC2TWS+lXvWPQNe4pFrECxAI2YqZRmN8+y8Y9Zo0m P4wa6IvO8GkxsBFLrvHLqcFIsKxaCLxu++FN2lTzW8/K71pKr7fldVxwXk+gi0iBmRc+ wvfc56/caAfBHWlTy6DNBbAtmTR5kTQ19/YmOb6Ku24nl5uCCcc6wh4vSO11CsgktS4D +G8N6M52N9AAWTUSCpLPr8zHVe1KrNVL7ku3fXfP7GjoXMYux3HpmCh4Kn+QFFMu8/Rg 2VacylY0aE/3U6810Vip++5wRVmTa5ymhUGB4iyNDuW0x8uEtGoEiQJprjLc7rZkolik D7Ng== X-Forwarded-Encrypted: i=1; AHgh+Rrh4jFSMCLH+GIdS+LwssZy8qa4YMUjQBszm25UwKP9S5VqBQHQmjd+evmC/VdKMjCHjTZq9ERT4g==@vger.kernel.org X-Gm-Message-State: AOJu0YxWT6dmlFnLkc6LpjIvPXpdxIttluXu5QLw6rxPhIa+AVpU9jmk 8nhfs6EaPd4ut38iv/ch+BlWTu//Ll0D9SvNy0v1YhjCuWNv3c7Ugo7eIOvNgZqlnbkqbqn6ZY+ oU38gQfJh8P2gwJ8fJWeQqsPOfia+b2HNYWj2aJlCw9zyvYXuTyd5LaeTkrZM/A== X-Gm-Gg: AfdE7cnMB4NBYDAIzhsqNVPYJVjwLf9LG0NTocJ/H7oRo1PvISRaVjqYGkT0VhQS6j/ 9Iv6Wu6PA0b5bukdUwu/JAGSiofZ+RUp7CztUhnq0+wtc8ZGMqMMS/aE+VnyQ1eVdv9InzCgzco o0xIVyrgq2tid5Z+/pAOG1V+itBDCOU86xJHp8mpdvL+RBieHAyxFzhAimhNE+t+hunkjFbqMC/ r22EGro+feEWW0SOmEncwzNxQrhI6KvezpouSQSw0AjoeWPKxebSnw0P5q0osmHNEBZK8qy0UF2 JhdToSSqKMQPawXzOeSB3yonmdKarsb8gms+dxma7vQb2yDdEYjTDROyX/XRkeEE8a0zkrv7r0j 1gEqkMw6H3yqgpp2nDXnuwjVqzuiCMrcfp+erlMck X-Received: by 2002:a05:620a:2911:b0:92b:81fb:87b7 with SMTP id af79cd13be357-92ebb4a74b1mr50556985a.13.1783341890125; Mon, 06 Jul 2026 05:44:50 -0700 (PDT) X-Received: by 2002:a05:620a:2911:b0:92b:81fb:87b7 with SMTP id af79cd13be357-92ebb4a74b1mr50548185a.13.1783341889592; Mon, 06 Jul 2026 05:44:49 -0700 (PDT) Received: from brgl-qcom.local ([2a01:cb1d:dc:7e00:86f0:c42b:ef4c:d3bb]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-47aa0a55be4sm22126539f8f.31.2026.07.06.05.44.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 06 Jul 2026 05:44:48 -0700 (PDT) From: Bartosz Golaszewski Subject: [PATCH v3 00/20] driver core: count references of the platform device's fwnode, not OF node Date: Mon, 06 Jul 2026 14:44:12 +0200 Message-Id: <20260706-pdev-fwnode-ref-v3-0-1ff028e33779@oss.qualcomm.com> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-B4-Tracking: v=1; b=H4sIAByjS2oC/23NQQ6CMBAF0KuQri1pp1KKK+9hXBQ6SBOh2GrVE O5uITEucDPJ/8l/M5GA3mIgh2wiHqMN1g0piF1Gmk4PF6TWpEyAgWQFMDoajLR9Ds4g9dhSo2S phKxKjjVJqzGV9rWKp3PKnQ1359/rg8iX9mvxjRU5ZVSpRsBe81oZOLoQ8ttDXxvX93k6ZCEj/ BgJ1ZaBhdE1QsFFW0n8w8zz/AGy8k9g/AAAAA== X-Change-ID: 20260520-pdev-fwnode-ref-d867836971eb To: Lee Jones , Mark Brown , Thierry Reding , Sebastian Hesselbarth , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Srinivas Kandagatla , Greg Kroah-Hartman , Vinod Koul , "Rafael J. Wysocki" , Danilo Krummrich , Rob Herring , Saravana Kannan , Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , "Christophe Leroy (CS GROUP)" , Andi Shyti , Andy Shevchenko , Joerg Roedel , Will Deacon , Robin Murphy , Doug Berger , Florian Fainelli , Broadcom internal kernel review list , Ulf Hansson , Frank Li , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , Matthew Brost , =?utf-8?q?Thomas_Hellstr=C3=B6m?= , Rodrigo Vivi , David Airlie , Simona Vetter , Peter Chen , Paul Cercueil , Bin Liu , Philipp Zabel , Maximilian Luz , Hans de Goede , =?utf-8?q?Ilpo_J=C3=A4rvinen?= , Krzysztof Kozlowski , Benjamin Herrenschmidt Cc: brgl@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-sound@vger.kernel.org, driver-core@lists.linux.dev, devicetree@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-i2c@vger.kernel.org, iommu@lists.linux.dev, linux-pm@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, intel-xe@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-usb@vger.kernel.org, linux-mips@vger.kernel.org, platform-driver-x86@vger.kernel.org, mfd@lists.linux.dev, Bartosz Golaszewski , stable@vger.kernel.org, Manuel Ebner , Wolfram Sang , Konrad Dybcio X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=4776; i=bartosz.golaszewski@oss.qualcomm.com; h=from:subject:message-id; bh=T44HwwZ1Q0M84+szoUbk3kJ64ZYTCT8dJmP8V7D67KU=; b=owEBbQKS/ZANAwAKAQWdLsv/NoTDAcsmYgBqS6MoJZpVWXquJPA86qFchcYH7k3Onxk1jGth8 HC7/Ub3emyJAjMEAAEKAB0WIQSR5RMt5bVGHXuiZfwFnS7L/zaEwwUCakujKAAKCRAFnS7L/zaE w5C6EACRXYySfkJXFyTq8zPf7US9VFpPW3RE274q/2YBjIesYwUF0YvCKdzVceLWeMMeG2J6zDW kKPnEeuZJw5iEdAZ/ZBRMOAmEubsTBD4+/6aCpJUokHzGF4atoDvN4qGLBs0yunKGDADXpORe53 DKH2ZSJAeyeh6m6ApIS2kFEuxPAFgHOGRfJ49oU8HWhghwyrfZAafNM/pnRLdSVbJtjR4bbqJ6Y ADMhQbYObhQcUZPL+Pd0/zZ3eceBO5sR75HXI1CpMPtBmnurs5y8ROaFhD1O9fRw5R31AaggXa1 T2PfA++SCs59XKUD9MZ+sbvqxbKl+eT1YDimp9jxs7EtpTwGbAhWKJQU1dnLAYH2DqJAyABQ2iD Jz+z/UKxaEuZta2/BUh9S+ltz05OQNOaGi4dnWyQZTjJOEOAndluZXURrk55+4Th+jZf/hivpZM PH3hYGyTBIsWD+3bwfWzc/ywqJmwpgf/lm6De13odOQ+CgbtKNhqj1YiAYm0ycwrxLOwiYpeFAh SafUvNI+inETJ5q/MDf2BgXJTLYnwwem1L9HjWvrd+KcxlyXvcNkU2NqjNIS+az2hgs6TyTwLj2 6nrCsPnQJTSJQyRyLK9DlcWtWmfUmUcgkvKbl/Gtc3sMJFlfIjSQa2osUPg0ZgDKsosfSkNp2al Q5/taAz6caNJmuQ== X-Developer-Key: i=bartosz.golaszewski@oss.qualcomm.com; a=openpgp; fpr=169DEB6C0BC3C46013D2C79F11A72EA01471D772 X-Authority-Analysis: v=2.4 cv=c6qbhx9l c=1 sm=1 tr=0 ts=6a4ba342 cx=c_pps a=HLyN3IcIa5EE8TELMZ618Q==:117 a=xqWC_Br6kY4A:10 a=IkcTkHD0fZMA:10 a=RAioF0-LDSMA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=_glEPmIy2e8OvE2BGh3C:22 a=bC-a23v3AAAA:8 a=EUspDBNiAAAA:8 a=rL0NY73m5x218zCt0XUA:9 a=QEXdDO2ut3YA:10 a=bTQJ7kPSJx9SKPbeHEYW:22 a=FO4_E8m0qiDe52t0p3_H:22 X-Proofpoint-ORIG-GUID: kZfo5Zn9zb1MJmAbQfY0NljMtMWiwaVF X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzA2MDEyOSBTYWx0ZWRfX7YaXwY5HeUiR Cr2rTbgQRa+5V+U/1FysuQQof5D0J9yGWU/H0/8NFEt0v9udkCFRz12QkcCI/7qgq0Na7/JTGUy si3b4CJ4uvPKoLGr60NUJ9E6rJjugTANjBPjQRnlqJkJdCyH/r19gQTxWUe9m7fsrnzuZtm211X hEgQPzcHxVC4/hBo9IBz4kNTQQRtY9OTyB9Rm7Js+DZ7eN+btxK6Q3/q1xzj8DU/3FQQbSlN31R MCQo7HhwSM6QYusIfFZKGwgAz6ReyCCn5egtjO/PTby8/MFhNIejLnuJGq2OwGdCuIwcC8Q9lQD l+1bNySnK3VVLZYAlsR0g86m/0al0SkHY2HoMt8hk12hH8NSd66JMMtRkZ67rWg3Lgzz5IfvjHc qtcU7h3HjhNRPg22+jEhHg/AoEqKGrW0MugUb5D+Bz4lBIoLmLL0kkZHdK9fIona2B0E80Xs9VD pNvtNvlU/7BRRt7d6aw== X-Proofpoint-Spam-Info: AW1haW4tMjYwNzA2MDEyOSBTYWx0ZWRfX0rczPxcXsHbu fFJhZmNxknmJP3/63h9jWYFkRdztIp+ExvAy2qVhW1vMdL/udOMuJyhrhm6tETWCrUWSoF6xXPT BFU7j8NGRyZ/wc+pz8ynS9cfYNzZK7o= X-Proofpoint-GUID: kZfo5Zn9zb1MJmAbQfY0NljMtMWiwaVF X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-07-06_01,2026-07-06_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 bulkscore=0 impostorscore=0 phishscore=0 adultscore=0 lowpriorityscore=0 priorityscore=1501 clxscore=1015 spamscore=0 malwarescore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607060129 Platform device core provides helper interfaces for dealing with dynamically created platform devices. Most users should use platform_device_register_full() which encapsulates most of the operations but some modules will want to use the split approach of calling platform_device_alloc() + platform_device_add() separately for various reasons. With many platform devices now using dynamic software nodes as their primary firmware nodes and with the platform device interface being extended to also better cover the use-cases of secondary software nodes, I believe it makes sense to switch to counting the references of all kinds of firmware nodes. To that end, I identified all users of platform_device_alloc() that also assign dev.of_node or dev.fwnode manually. I noticed five cases where the references are not increased as they should (patches 1-5 fix these users) and provided three new functions in platform_device.h that now become the preferred interfaces for assigning firmware nodes to dynamic platform devices (in line with platform_device_add_data(), platform_device_add_resources(), etc.). The bulk of the patches in this series are small driver conversions to port all users to going through the new functions that now encapsulate the refcount logic. With that done, the final patch seamlessly switches to counting the references of all firmware node types. This effort is prerequisite of removing platform_device_release_full() and unifying the release path for dynamic platform devices using unmanaged software nodes. Merging strategy: The entire series should go through the driver core tree, possibly with an immutable branch provided to solve any potential conflicts though these are rather unlikely. Signed-off-by: Bartosz Golaszewski --- Changes in v3: - Use device_set_node() where applicable - Use __free(device_node) in fsl iommu driver - Don't use __free() where not really required - Add a patch updating the kerneldoc for platform_device_alloc() - Collect more tags - Link to v2: https://patch.msgid.link/20260629-pdev-fwnode-ref-v2-0-8abe2513f96e@oss.qualcomm.com Changes in v2: - Rebased on top of v7.2-rc1, dropped applied patches, collected tags - Link to v1: https://patch.msgid.link/20260521-pdev-fwnode-ref-v1-0-88c324a1b8d2@oss.qualcomm.com --- Bartosz Golaszewski (20): powerpc/powermac: fix OF node refcount driver core: platform: provide platform_device_set_of_node() driver core: platform: provide platform_device_set_fwnode() driver core: platform: provide platform_device_set_of_node_from_dev() driver core: update kerneldoc for platform_device_alloc() of: platform: use platform_device_set_of_node() powerpc/powermac: use platform_device_set_of_node() i2c: pxa-pci: use platform_device_set_of_node() iommu/fsl: use platform_device_set_of_node() net: bcmgenet: use platform_device_set_of_node() pmdomain: imx: use platform_device_set_of_node() mfd: tps6586: use platform_device_set_of_node() slimbus: qcom-ngd-ctrl: use platform_device_set_of_node() net: mv643xx: use platform_device_set_of_node() drm/xe/i2c: use platform_device_set_fwnode() platform/surface: gpe: use platform_device_set_fwnode() usb: chipidea: use platform_device_set_of_node_from_dev() usb: musb: use platform_device_set_of_node_from_dev() reset: rzg2l: use platform_device_set_of_node_from_dev() driver core: platform: count references to all kinds of firmware nodes arch/powerpc/platforms/powermac/low_i2c.c | 2 +- drivers/base/platform.c | 61 ++++++++++++++++++++++++++-- drivers/gpu/drm/xe/xe_i2c.c | 2 +- drivers/i2c/busses/i2c-pxa-pci.c | 3 +- drivers/iommu/fsl_pamu.c | 16 +++----- drivers/mfd/tps6586x.c | 2 +- drivers/net/ethernet/broadcom/genet/bcmmii.c | 3 +- drivers/net/ethernet/marvell/mv643xx_eth.c | 2 +- drivers/of/platform.c | 2 +- drivers/platform/surface/surface_gpe.c | 2 +- drivers/pmdomain/imx/gpc.c | 3 +- drivers/reset/reset-rzg2l-usbphy-ctrl.c | 2 +- drivers/slimbus/qcom-ngd-ctrl.c | 2 +- drivers/usb/chipidea/core.c | 2 +- drivers/usb/musb/jz4740.c | 2 +- include/linux/platform_device.h | 9 ++++ 16 files changed, 88 insertions(+), 27 deletions(-) --- base-commit: 8cdeaa50eae8dad34885515f62559ee83e7e8dda change-id: 20260520-pdev-fwnode-ref-d867836971eb Best regards, -- Bartosz Golaszewski