From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) (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 CD42E3F8254 for ; Mon, 29 Jun 2026 09:12:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.168.131 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782724381; cv=none; b=RkaU7pnxxnhYK306VaTQ0zg7UMHWIDGMBKoBMyZOFtj5lr/MK43w1Q2zuwt9Q+Ae+kB1M57DHYAtpx1PyW8JwibbCirsdEC24vQizqBaRFmMLuhSJmrM+pMqsX1G4dqB524C5nCfwNpyCbRQLF2aobayWzw121J4vWnZYYs9ITU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782724381; c=relaxed/simple; bh=SVCO5gWvclBRpZDymBp3Xgi/Iwkz3WPRgBlCjAVpAdc=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type:To:Cc; b=ooo236vO8J94xApydSUu550mUcRWi05doQEFdVpCFP+ar96dZXrN/G223wiIEsxeIvvYd1WfVMuuYI1Tfag5FqD7qJ/cqnKjgfo/k1U19WDTXzFyEp6ViIczUZLlfTqB9LckUfp/w3rg4w7k9CfpSZJ6QLx9I13BY1qqFt4GcC4= 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=REa1Sqeu; dkim=pass (2048-bit key) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com header.b=WLJT1iJe; arc=none smtp.client-ip=205.220.168.131 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="REa1Sqeu"; dkim=pass (2048-bit key) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com header.b="WLJT1iJe" Received: from pps.filterd (m0279867.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 65T8OISR2348855 for ; Mon, 29 Jun 2026 09:12:59 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=9pHsHj8j3f9AJ4gGh3rvQi L5ZcEANVsagK59YcLlw7c=; b=REa1SqeushWSQer8aXnmzptQdlYOnad/KzZIbr rVjM4xb7i0SX74d0nA2b+w9XRvBwQkqhep6aT+ltZ1ouyDakYMkRa+VyocWigHdo ECwkr5q1JXG7+mfowPxSQdQs6XgnFgiHD2IUwclaJNx1g9ZF02zxTaIFo6yBhq56 Hf/eR9yqJ/wbPWGBiH+qs6pHrsCT+T18AtHMuqpDZMwZNXa7J8/pZ3lT78YJWlPO BYhuTeqodcjSJqaSuoP8RudOhsInRwXgPAPoYeft1FxenH75SlwxfQp3KgcyJJrK 52n/t2iwdFpv0jMUlhS+1DragxFC2Cru9FOYXkTn8lAor5kg== 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 4f3n5s078b-1 (version=TLSv1.3 cipher=TLS_AES_128_GCM_SHA256 bits=128 verify=NOT) for ; Mon, 29 Jun 2026 09:12:59 +0000 (GMT) Received: by mail-qk1-f199.google.com with SMTP id af79cd13be357-92a62578049so487132585a.0 for ; Mon, 29 Jun 2026 02:12:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oss.qualcomm.com; s=google; t=1782724378; x=1783329178; darn=lists.linux.dev; h=cc:to:content-transfer-encoding:mime-version:message-id:date :subject:from:from:to:cc:subject:date:message-id:reply-to; bh=9pHsHj8j3f9AJ4gGh3rvQiL5ZcEANVsagK59YcLlw7c=; b=WLJT1iJeLTlr2yWtt0xRftEanszKaZhPm2OS/uVRlHACaxFuWg5xIJ0DxSaGWBfK8y c79oEpOKL4lfzbstTVF0ZgoScnp3TvRW31Qif5CpOOnrkQuwtxSt4Y566YdKoqzmNsN2 4njcjXeqD0b/0PLp8QsARXFrHd5hBi+JWGgoVkjpUSCI9szMInTyNN62h7wyShu3XPnO JezYyUGMopVgQUF5XgF4q5TlSUuzmp264jzb9UbvjUfmzqI0aZ0al40OptkbHYlAfQui 8llef2fQuvEkC9OeRfz3QWzLD8DUhQYK76QzK3o2XcYM2FvPtKWkcz5D/CBjpoiAu0Fu k+ZA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1782724378; x=1783329178; h=cc:to:content-transfer-encoding:mime-version:message-id:date :subject:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=9pHsHj8j3f9AJ4gGh3rvQiL5ZcEANVsagK59YcLlw7c=; b=rf6BIVKgCrmSCA+a3N62cqFKgnmbGIOphFuJS/VjtYQ/KphXfLkOtAxqTtphoSmrDX /Pjc/jls4RoHf/MtX3I8o7OS88HugUN728oplLLice4OH5ERDTYGD1KG9cCr87BM/xkW CV/xXtwvoTfvcvO3TP5BI+HEp/DHStUXiabQ1QqqXftdu4OuJVlmqb+RQUUWA7aQy8G/ mqPuEI41QwR1h1Mr6oY/A6CsvgWmNiul6Rk0/8RbLUtyR3JbTmdNKfGXbKVbMbUMZKfb 4sdBnDzYvYzl9EQiJteBUMZNcagkftfz9uX6rdLDS8euyOqriDEyQDfJukEV3UbGzFjz un5g== X-Forwarded-Encrypted: i=1; AFNElJ8MORcyKuPpSbPAcWA9gS2bnTOwe+Vu+rhZPsMgMWW2HYUtKlM+11lI1kFtc9vevBnDrEHYcLDQHL31Eg==@lists.linux.dev X-Gm-Message-State: AOJu0Ywo8PSo5XK7EvY2yZOGN9WCIeYPaNVPu4iBOoZN6Nm3EEPnPpow HYLpvxEuYxN7sVLS3RKlIkuwgrQVNemFfa2PpatuDseGLfUP4aP8mgsinutTd4rWCTidkrxuIuo VsgOvNRK3wzWpjus8VnxUJd+3184U+pME9szwtHMKsvmUjqZfWJu84TE2QaUncjdaow== X-Gm-Gg: AfdE7ckSi/t0Uf6bTPxmzy03ByLPhOs+oDbp8GIrY2sfWlVC+m29fHQicxVVCyXiA1k YxYdU5ONQFbM+0IflVYAir+CpdmyaRUr755rF6zPcOoKjyN4cLMyb2hFts9li39ggtyYjdti8mU AQqOuWP2vngDs3KyZYiLQoeBiuy+zt1U8tx81fWk8O67Slf2LN8ZiZFKkBJOKt+K7STsR8AIOn5 Iw7OQpH5Px9xB6JlokctPrtuw4mPB2gFHzx5jjLXbm3kqSM7XrqRtLyirA6FYOROzHmncCNiNdg 6HF3tMnkxzFis9HBBIWG0u9ZDvth3KEsgSG/g7WsqvgxQqU0VkCene+nhT7gLqlHoQp1xQ2bHM9 rUix1K1AesR8aXaxhqbCek4Fb+emzRQKh4aBpmwaq X-Received: by 2002:a05:620a:4693:b0:915:fc16:2ae0 with SMTP id af79cd13be357-92601f1b941mr3700622285a.25.1782724377994; Mon, 29 Jun 2026 02:12:57 -0700 (PDT) X-Received: by 2002:a05:620a:4693:b0:915:fc16:2ae0 with SMTP id af79cd13be357-92601f1b941mr3700615885a.25.1782724377393; Mon, 29 Jun 2026 02:12:57 -0700 (PDT) Received: from brgl-qcom.local ([2a01:cb1d:dc:7e00:4640:d76a:6126:9b65]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-470f55acda0sm20109240f8f.23.2026.06.29.02.12.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 29 Jun 2026 02:12:56 -0700 (PDT) From: Bartosz Golaszewski Subject: [PATCH v2 00/19] driver core: count references of the platform device's fwnode, not OF node Date: Mon, 29 Jun 2026 11:12:23 +0200 Message-Id: <20260629-pdev-fwnode-ref-v2-0-8abe2513f96e@oss.qualcomm.com> Precedence: bulk X-Mailing-List: driver-core@lists.linux.dev 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=H4sIAPc2QmoC/2WNQQ6CMBREr0L+2k/aolBZeQ/DorQfaSIUW60a0 rtbSVy5meRNMm9WCOQtBWiLFTxFG6ybM4hdAXpU84XQmswgmKjZQTBcDEUcnrMzhJ4GNLJuZFU fG0495NWSS/vajOcu82jD3fn3dhD5t/25+J8rcmQopa7EXvFeGnFyIZS3h7pqN01lDuhSSh80E UEUtQAAAA== 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, Bartosz Golaszewski , stable@vger.kernel.org, Wolfram Sang X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=4368; i=bartosz.golaszewski@oss.qualcomm.com; h=from:subject:message-id; bh=SVCO5gWvclBRpZDymBp3Xgi/Iwkz3WPRgBlCjAVpAdc=; b=owEBbQKS/ZANAwAKAQWdLsv/NoTDAcsmYgBqQjcB3e6fvH8ZvfEeXy1YHmy9qNmpXNBrMB4kt LmEukvHaW+JAjMEAAEKAB0WIQSR5RMt5bVGHXuiZfwFnS7L/zaEwwUCakI3AQAKCRAFnS7L/zaE w40lD/wI6sh/lZCL9bUVUVfhXHR/FqEMavHUiaEtY5IReyg186SG0Mncc66am9ylUTBeWqQ/Liw PzdetjPKGkl2mRBV79p59svntSoPYTxm6bDfJPTylBULVfRbMV7zUX6GR1R+9sMsAdjQHtttUXf ZBYlTf8+D4tdCF3nYWHuDG6oYuVSuhppnHyCuIBenJainf9Et2R1oilvSiR6Hk44dtysCxxi138 A6o/fQNZwJLNbc3o5niJuwb3gwBibFPBM4cUBQAVUlDHNnBKyZCxcqxvDR5Ded0FPvaLw4EoqSz Gk3oBMfE6C7nlRN1JjX9mIG6cMstinUsYDiLYHKq78u4qimbUdoG0ZCLgugigHzUfVQzn6Dk7jq iO+7/OLu8FPESDY773Btr8TTJIEPdZtDzxzBMfpVVf61+me8i7ek7mzZjdn5o0vlajQPr2sqeQu GU1drfykhuySyrVsiDuF5zWfbXZg6txYZ7r4Xxxlr2oR5fqMX+olKS7JxDu5bUDCkONRb2obyvO aFVU2bR34ttE1KlDGhTcuXUbyvTHH4mMDh4sHOCLfxYHwZgXl8Tx7JwiJ0biQHhZLEwRAlBTImw 4dVDIoHBWFRybmqNGjB4p+CCdmZWlRuXhakcLbWo01E6rCLmZBNphAu0jdgsDfCGFnENlKAoNdd L4/8S38znNlGEZw== X-Developer-Key: i=bartosz.golaszewski@oss.qualcomm.com; a=openpgp; fpr=169DEB6C0BC3C46013D2C79F11A72EA01471D772 X-Proofpoint-Spam-Info: AW1haW4tMjYwNjI5MDA3NCBTYWx0ZWRfX1imIGjYD8QV8 K4BPhyULsts5573XoJi4tpSvMHYOevJofE/vAII4Ip0H2/T62QPKQhp9Sb2d9j+Rds2Fie9JcSj 2XvrFzHDBCVAi1t34kU8EBno2gWZLQE= X-Proofpoint-ORIG-GUID: 4VdN_ptPohzzWpjKAT4THMHHVjwbQjmE X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNjI5MDA3NCBTYWx0ZWRfXww7AvHOwf9oE 5rs7syOuwiTTLIm1oCB+zKs/HToQXkh+pfC9cdeq0AkjowwctW/HFGrNnfILu1B2sf0AQ/H1iBA kF95DCwkGVRptZGuHY1N1Jep0n4XLQXt1Sog+eHj+quCjlUJZIa9LgIjZfuDhDdevveGH3GvFag gis3dhoCKcLAtorVh1ZuxNk6WQNaAniETx5KGuw6Uh7GX9A/0vzZJq1C6N9mx/04mG7LAz82NBb A3l5asZIlRjgEgJm+Xj5OcHc53vOoC/CtbsCyccMmuy8pupB5S+qm0jfAd/1j0tcs1jeQiT8vfn LGlJ0I58r2nqIhlM23jmuNWhn0dslikTz14FcUNysza8MIpGPFOIjaDzGdSqoPQmZjqntNEgBS1 0HLdBnP1Z0wWevDve3p6Jyo9W21sdxk8jN4k2hFbJ3L57fceG3LOqA4Spi4qHkIhDPVeh5njMtJ T185aELMpSvg2HvF5kA== X-Authority-Analysis: v=2.4 cv=NZzWEWD4 c=1 sm=1 tr=0 ts=6a42371b cx=c_pps a=HLyN3IcIa5EE8TELMZ618Q==:117 a=xqWC_Br6kY4A:10 a=IkcTkHD0fZMA:10 a=FelO9ux0wxsA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=eoimf2acIAo5FJnRuUoq:22 a=bC-a23v3AAAA:8 a=EUspDBNiAAAA:8 a=rL0NY73m5x218zCt0XUA:9 a=QEXdDO2ut3YA:10 a=bTQJ7kPSJx9SKPbeHEYW:22 a=FO4_E8m0qiDe52t0p3_H:22 X-Proofpoint-GUID: 4VdN_ptPohzzWpjKAT4THMHHVjwbQjmE X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.125,FMLib:17.12.100.49 definitions=2026-06-29_02,2026-06-26_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 impostorscore=0 spamscore=0 adultscore=0 suspectscore=0 clxscore=1015 bulkscore=0 priorityscore=1501 malwarescore=0 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2606290074 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 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 (19): 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() 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 | 56 ++++++++++++++++++++++++++-- drivers/gpu/drm/xe/xe_i2c.c | 2 +- drivers/i2c/busses/i2c-pxa-pci.c | 3 +- drivers/iommu/fsl_pamu.c | 7 ++-- drivers/mfd/tps6586x.c | 2 +- drivers/net/ethernet/broadcom/genet/bcmmii.c | 10 +++-- 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 | 8 ++++ 16 files changed, 84 insertions(+), 23 deletions(-) --- base-commit: dc59e4fea9d83f03bad6bddf3fa2e52491777482 change-id: 20260520-pdev-fwnode-ref-d867836971eb Best regards, -- Bartosz Golaszewski