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 89188330D4C for ; Fri, 3 Apr 2026 13:52:06 +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=1775224330; cv=none; b=Zu+sqJxtE5jHU5o8OLk5w46WuanyL9utTzmaEWj0DaNBuhIfvL7C61eNTP5+ChQkGtaJ9Iq3fe9vbAdsDFBi87SJBLLzE6tkEoG+Ig9RAfloG2jqSlNpwLUj/I8wG/XiNsJBjREIdnzaTUGKhj/L1BaHlmtme4r4euQlP6Xr1WM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775224330; c=relaxed/simple; bh=NlWOA6UrBUxPU2ZmL/Aama748Uq244oTOSPRnxCWr80=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type:To:Cc; b=CnVR4AV7HMBfg6W9jBhO3r0t5S7WroQ7oOtsEZm1bRydc7akB1EFIvAeLqkfMIn9wuhwku5QkMJdZKJGIN9nJLpF4OqSYYR3NX4zdR1dlI1P9/H/I3lbdKtkXHe4BeuoSrW1RYIuZFGwWcYZ1UOc5lYkiw5q4bDfQqXaLcQb/o8= 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=Uy6V79kX; dkim=pass (2048-bit key) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com header.b=VEu5G6pI; 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="Uy6V79kX"; dkim=pass (2048-bit key) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com header.b="VEu5G6pI" Received: from pps.filterd (m0279873.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 633BMcJK982208 for ; Fri, 3 Apr 2026 13:52:05 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=Jncd9S+sPgUnlMtnW1kBhI 3ZQuWK02IAKrgbnLxtzqw=; b=Uy6V79kXpcuITgY8AQLFAO2QboAK3c6Ukc/jNq NNS1GhOkUrLZqRV/4L2c7Vj8CccSup7x21tx3YhNiBscrNeZK8//eLN8mS84JxW5 mqvy6cXLwX2bTAd7jplLELf7jLFC7eYofCrrQeNd1ko0TPkcxyChjCcBBU20UJvE VXHj9zDVFghxgk8bzolx593Un0nygJQk4p2fItgmLfJnYF2CDupCHB4iaBtXU/6p rF87apN4QKkethSsvEsROoBKqxrMsLr+cfBksUjnlb0kXro6O881/lvKBtYBUoYH 7T1z8Vnw6nCxax+YX80pSfPNfBZMN8gSeJIJqPce9bvMlnjg== Received: from mail-qt1-f199.google.com (mail-qt1-f199.google.com [209.85.160.199]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 4d9tupuqtm-1 (version=TLSv1.3 cipher=TLS_AES_128_GCM_SHA256 bits=128 verify=NOT) for ; Fri, 03 Apr 2026 13:52:05 +0000 (GMT) Received: by mail-qt1-f199.google.com with SMTP id d75a77b69052e-50b4076dc16so83271401cf.2 for ; Fri, 03 Apr 2026 06:52:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oss.qualcomm.com; s=google; t=1775224324; x=1775829124; darn=vger.kernel.org; h=cc:to:content-transfer-encoding:mime-version:message-id:date :subject:from:from:to:cc:subject:date:message-id:reply-to; bh=Jncd9S+sPgUnlMtnW1kBhI3ZQuWK02IAKrgbnLxtzqw=; b=VEu5G6pIXUbsu943laVERkpJezzcbWyJN8A4VDEZ18wNrVKXGH+I0L2J+VgaueVr7s k+xqUQdNtmlYaT5m1F5J8nSgWZrmaHj+DHEUtpBWkHooXV0+uUclr7lszRl7ZT7ibqfI affi+D2eVf4F/bUGwPLFKLzdMVvvz0ZQQAx/M2t2LH2Gcg88BvNv26u08qirzpYobRkM rh2bqRLGhTnG+VxSLehcSiNgrGRkgy4qtk3VkM2cKzuxCpUAuV1NKBknakVUuKddSQ87 tIXJVTb45WdCx5n3SdbLUgtSVne3zSRmmWwLcpcwamD33XJ2fsfgxv7il8vpvkERj7kI qFOw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1775224324; x=1775829124; 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=Jncd9S+sPgUnlMtnW1kBhI3ZQuWK02IAKrgbnLxtzqw=; b=NTRr4v9RNaiXy4InpjyHQFEZ4p2bpDwXw6QxjiA4IZuteRsX1kMx6HMssCm5wocQuG wwd+Ek1gewkucrfDp9bWk3gkZBCTjc3UdVb7ZTmhVe8UrsHRLC5C8M33w3ofXJ2oFo0g jH/4fuVYH9tSYb0KQuwHNW9MgrqwiTTpItBJMdHPxHSNiTKacS1T+54iIyozOWNfecJL BP0Et9p/2uhN/l0VlvZLp+F6BEUYHFIiUBH+WNVP0jORk3XarYjR+fVpbUeL/QF5gHkK nl84X/LHqCYvINHijNi5IzmeOzdu+bMwO5TAxSiEMCLeWiz8o8E1SkZYF32MDW3typki +s5g== X-Gm-Message-State: AOJu0YzZia9VYHqmTYh2dzBmoatJE+WNb3FvuZlyNvwiukeXHPzIE30k l/k4lNx/keBIk0z3F2E9QzEYGe6s9KK3diMey9RsQST8tCBuiY0Kw3JY0VqSlWeMEdVLPUbNMMF D6K91TgvdhsGuoTRDOY9RHC8zx9nHIfb6L1AVjZd9vW41gzVYmSxp6J5iFCC9LTfU8ZJLo7q6 X-Gm-Gg: ATEYQzygIcWxy73FcKBctIiNK8eGTBnFC02jWVwAxd7Jas9XfhDPHWFyHxOHVDCp5ZP iEulW+EcEIRbOiyBCkkADTEGdPFtWYLTL+/+vm+/mBcu7dORKkNp/MHsWOnjO2f6d4GSdN9XG6q +imK2AKtEW0f4hrisJmfmo/6fL4d8ocDEtB3+fF+U9YVF5Ccl3Z1qhK9KumE/by4o4KSpj7geE6 1mwoIk6jaSp6Kynr5IG/D+Qn+eQ6PDyztFn0VU8Wm2r18LSutUDU8x32HyXcIsvHsYOWmV0Mx8J To9uMXlyuJGeqDwq/M7E4gBXRR9KNDiMP75rnrIkSHm4VsT7t7W4IkF+uDLjfJ9ECcS7m8GkWEn zM/W+ehXnBn8z2Emz5wGEEXUj+ED4MX6HRBJSAGVDujHfk/fqLPFW X-Received: by 2002:a05:622a:260f:b0:509:2448:410 with SMTP id d75a77b69052e-50d62ae8458mr42937841cf.47.1775224323932; Fri, 03 Apr 2026 06:52:03 -0700 (PDT) X-Received: by 2002:a05:622a:260f:b0:509:2448:410 with SMTP id d75a77b69052e-50d62ae8458mr42937351cf.47.1775224323446; Fri, 03 Apr 2026 06:52:03 -0700 (PDT) Received: from brgl-qcom.local ([2a01:cb1d:dc:7e00:129d:59e8:f7c9:47ca]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-43d1e4d29bbsm16948132f8f.21.2026.04.03.06.52.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 03 Apr 2026 06:52:02 -0700 (PDT) From: Bartosz Golaszewski Subject: [PATCH v3 0/2] driver core: make references to unregistered software nodes a special case Date: Fri, 03 Apr 2026 15:51:49 +0200 Message-Id: <20260403-swnode-unreg-retcode-v3-0-7886092b28b4@oss.qualcomm.com> Precedence: bulk X-Mailing-List: linux-acpi@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=H4sIAPXFz2kC/x3MSw5AMBRG4a3IHWvStAi2IgbKjzspufVKxN6V4 Tc456YAYQSqk5sEBwdefIRNE+rnzk9QPEST0abQmbYqnH4ZoHYvmJRg6z/Z0uWuMuicKSmmq2D k69827fO8EvG3YWYAAAA= X-Change-ID: 20260403-swnode-unreg-retcode-38b5b92eab28 To: Andy Shevchenko , Daniel Scally , Heikki Krogerus , Sakari Ailus , Greg Kroah-Hartman , "Rafael J. Wysocki" , Danilo Krummrich , Mika Westerberg , Andy Shevchenko , Linus Walleij , Hans de Goede , =?utf-8?q?Ilpo_J=C3=A4rvinen?= , Dmitry Torokhov , Len Brown Cc: linux-acpi@vger.kernel.org, driver-core@lists.linux.dev, linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, platform-driver-x86@vger.kernel.org, brgl@kernel.org, Bartosz Golaszewski X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=2105; i=bartosz.golaszewski@oss.qualcomm.com; h=from:subject:message-id; bh=NlWOA6UrBUxPU2ZmL/Aama748Uq244oTOSPRnxCWr80=; b=owEBbQKS/ZANAwAKAQWdLsv/NoTDAcsmYgBpz8X6M2qYjAHwaPwqmT/pp9+4mIAqzXsPY+bba kOFCo306GSJAjMEAAEKAB0WIQSR5RMt5bVGHXuiZfwFnS7L/zaEwwUCac/F+gAKCRAFnS7L/zaE w1LuEACh3O8artkXQUwfvuuCLjG5ktBfI+U8MJhhKQCCBPkRGQnZ6rphdma2YLCZHXYMRx7G27i GV8ZdKW+/q+QQ6h3mgev46ldzgTc5MKF5STbxlMc96ctIr352g7BhqKNc2az2ItE/YuTLTbGFe3 q+c7VXV8xoD3e1AZR9nEvGZd1rPnx3SvAf0MGNUHebfG7umL/jlHx5JGPBdHdxJ2ogP+rCW3Tc0 ftLLcX+fC/2oWOM+b3lfwz/Lxps/oe06HmPUwDVcUeotQjSNBUVGOmp9ysbHka0LQYUGfe1MC7s 6lyO8m6wx02afdnNLPFDAq/9QuBm80TIPT6OQLJiEVcqs8UE+z/hAsLaJj8IHaLxQy9N7iS8VLR 8q3yE54xuM0fomeiy5yFI76SYHYXIMB9vajE0cDyilOuKapYBF8QXzwxIAqojSqJkKdAEoucHeD pV+DXYZNsHo/2ePt1/SF0mEvlNFgKj6h/qeNYC+ttJWVgsha5zvj7dRGe09z0L7oMsXfOYJWnLS /zdwt6KHQvf+Wj/zLpWz7DDc2It9cspD//3kDzP0AlKnZ2cn4vfjh8c7qMp6CSY4mEImYBbfJ8C kk5t40EMKxz0CI5BdkSm8J/g1o+stvJgX+6p3lXxW+4e68ZEjWL4LpXJZPrl/lH1yijL82eTFsd po+o2jNh6+zmkog== X-Developer-Key: i=bartosz.golaszewski@oss.qualcomm.com; a=openpgp; fpr=169DEB6C0BC3C46013D2C79F11A72EA01471D772 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNDAzMDEyMyBTYWx0ZWRfX/mQXG2AF3gFU oCnuC0hkXT1Mrz28GyT+ylS0oSkYeyJg/aP4pIX5B+7WSDLJkg3/Tt6v9jB+QmJm4t7pfmAYU9+ ffuqtj4xHqRmo7nzeweQ5uRECPcNI0aInj+jYNm7fxStQQVxZTUTXGKoNcfoMD8qMVoluIrEJV1 xahFooxAgjCN0Zks2ZnZW68Qmm+v+m20AL/ChFWzXE0Jord4g61pIyitMaRSTdH+5cdnmcQ5RRp q7DE+TASEfEdf3QYHVfXH+9DlN5/usGcnq7BVdXrlozlI36KFgsAImuOD6WKFp2EE0+t+U7Jz15 TnasVQ+eNMPaC/8pUzkyD2I47/oG/2Incgn1I+C8LAIwYmHx7GvNbO6960ZVUbMJ0i2oVPbM95T ISMGq2lQeuqOgo3dJsSfJkln41crDehPghqnrdVyfHOdmTWYKZdRqEAHfA5HCcQjscrsmn+a+KZ NFrcbRFqvut96ri3fTQ== X-Proofpoint-ORIG-GUID: Knyxu6cnIWi0sxLLZGAXsYOBsMRNVvZV X-Proofpoint-GUID: Knyxu6cnIWi0sxLLZGAXsYOBsMRNVvZV X-Authority-Analysis: v=2.4 cv=DZ0aa/tW c=1 sm=1 tr=0 ts=69cfc605 cx=c_pps a=WeENfcodrlLV9YRTxbY/uA==:117 a=xqWC_Br6kY4A:10 a=IkcTkHD0fZMA:10 a=A5OVakUREuEA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=rJkE3RaqiGZ5pbrm-msn:22 a=bC-a23v3AAAA:8 a=EUspDBNiAAAA:8 a=h3m_6F4IQ1uC9WK5d8AA:9 a=QEXdDO2ut3YA:10 a=kacYvNCVWA4VmyqE58fU:22 a=FO4_E8m0qiDe52t0p3_H:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-04-03_04,2026-04-03_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 phishscore=0 bulkscore=0 priorityscore=1501 suspectscore=0 adultscore=0 malwarescore=0 clxscore=1015 spamscore=0 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2604030123 I spun this out of the bigger series (see: link to v2) in hopes that we can get it in for v7.1 and make follow-up development easier next cycle. This series proposes to make unregistered software nodes (ones that have an address but which have not been passed to software_node_register() yet) a special case with its dedicated error number. This will allow subsystems to defer probe as if it was a firmware node not backed by a device yet. This is done in order to allow easier attaching of software nodes to GPIO controllers and the removal of current label name matching against the software node's name. The patches can be picked up independently into driver core and GPIO trees. Signed-off-by: Bartosz Golaszewski --- Changes in v3: - Drop x86 changes from the series (will be resubmitted later) - Use -ENOTCONN instead of -ENXIO to indicate unregistered software nodes - Fix retval check logic in gpiolib-swnode - Link to v2: https://patch.msgid.link/20260402-baytrail-real-swnode-v2-0-6f5054a4cc07@oss.qualcomm.com Changes in v2: - Completely new approach - Keep the cherryview and baytrail secondary fwnode handling as a driver-specific quirk for x86 tablets and don't introduce any new API - Change the return value when resolving a reference to an unregistered software node and defer probe in GPIOLIB in that situation - Export acpi_bus_type for use in x86-android-tablets - Link to v1: https://patch.msgid.link/20260319-baytrail-real-swnode-v1-0-75f2264ae49f@oss.qualcomm.com --- Bartosz Golaszewski (2): software node: return -ENOTCONN when referenced swnode is not registered yet gpio: swnode: defer probe on references to unregistered software nodes drivers/base/swnode.c | 2 +- drivers/gpio/gpiolib-swnode.c | 11 ++++++++++- 2 files changed, 11 insertions(+), 2 deletions(-) --- base-commit: cc13002a9f984d37906e9476f3e532a8cdd126f5 change-id: 20260403-swnode-unreg-retcode-38b5b92eab28 Best regards, -- Bartosz Golaszewski