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 8B4F4450906 for ; Tue, 28 Apr 2026 14:23:32 +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=1777386218; cv=none; b=I2q+zym2OYMIa21D5QNdBDZlnHKJHWTKeK9oW9QynvP81gQDe6z+dJ/cGul5aWci0DuO97mIbsKPVJ92QTQODwmY8pafcazhIzlGN/LYk7+t360k2nm2oX/GHn0bG8dbx96c/Wo0JMLmcHwkiHFnAeaCsxorjVoLUolw/z3pbWM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777386218; c=relaxed/simple; bh=JHOUVT0V1f6mw0N8o8TQITsurij+VJ8yGqDAQM2x4i0=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=M1g7ehaF6xn7YmyieQnr2RfsYH6X7hsE+H3hv4laZ4xqBVMJEjxa29hUBG4afs6BTPPNPrN3my/BPQT+O1c7k3eVPy5KsoFeLWj8QopTBfHl4+wekbRj8vHOdGdQf/O74qmX4mTxIQG6wNl13L4FbSn/NrGXQRSKYN8B1UqX/ZI= 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=EcpAQh6T; dkim=pass (2048-bit key) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com header.b=JGCxDVa7; 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="EcpAQh6T"; dkim=pass (2048-bit key) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com header.b="JGCxDVa7" Received: from pps.filterd (m0279864.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 63SE5HbX3457461 for ; Tue, 28 Apr 2026 14:23:31 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=qualcomm.com; h= cc:content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=qcppdkim1; bh= 2Q1pBVZE4xUj8/QalPHOJhwaMsZksGiJpCvGtPNlm6s=; b=EcpAQh6T9qPyWr8l yo7/iDh2mvD2DmoZ3LQIwNGfL8V4wJTtdC2zRUwwoXlwlRKw7tuOUg6KOifU/4CP UrnUdvNmG+IvkyXs+9OstpsQK6fmAMM9MszTdh+SBWw4GJhbcoH2O2H0sCXclvQ7 zoQQHAxmYz57Lr4TzeDb6+Jr7aXyC6L2tYn3tLfT/nfiK/O4c/WIlXw5WlgrjQBl /Hew6k6EWh6JBV4EyzP1TFMWHhfVzoCxdksYi8IHo4xF23hRwQ2L8nqYY0/RS+8H ksRpS6lFHVd3bJAYFxshm0dDtohw4J3Yyx1GzURiV5VtZ3cRULJSRIAlJ418s5Qh CVh6MA== Received: from mail-vk1-f197.google.com (mail-vk1-f197.google.com [209.85.221.197]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 4dtxb502yq-1 (version=TLSv1.3 cipher=TLS_AES_128_GCM_SHA256 bits=128 verify=NOT) for ; Tue, 28 Apr 2026 14:23:30 +0000 (GMT) Received: by mail-vk1-f197.google.com with SMTP id 71dfb90a1353d-56f694e2ab8so9653871e0c.1 for ; Tue, 28 Apr 2026 07:23:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oss.qualcomm.com; s=google; t=1777386210; x=1777991010; darn=vger.kernel.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=2Q1pBVZE4xUj8/QalPHOJhwaMsZksGiJpCvGtPNlm6s=; b=JGCxDVa7xDL3CmLidLCAsUs+l7bdiNDKSJ8Uch2sM7jiSyOzwEZTiqCws9hMyw0s2Z kZfe4Uo4vx06KZpEwvjUqSTCwy+DP7N2moOCB4WoMiVCUuIEZ0X/tCF97PCB45D2PN+h UbhI/eyeXoUd+i7og0r/++0EUyL9F9kErQFVPFjF0WgdQ7JGbFtf+GAwB7c7JhqlCTRN utUyfXcUvMDVjhKX7dEXoj0RdroXsf7H9jKlM36ekx25clmvdggnXLDGGMxPHJ2PuqyR xpjfSzw4WNX8WyPODAth4jESX/0G2TCCwhhEZtywoCnI9wBXsArqYeb+b64Qd2G5iTDH xIew== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1777386210; x=1777991010; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-gg:x-gm-message-state:from:to :cc:subject:date:message-id:reply-to; bh=2Q1pBVZE4xUj8/QalPHOJhwaMsZksGiJpCvGtPNlm6s=; b=rHUoSrYPUmq12v7q0mMTEOvbkD0XizT0JK0bDjZvWLKA3aq+7FfiEOnQOMWYVt/y7L 0VkILUduW9bhhfIan4fMxH9DGXA5zgBxkjmCERyzxhBF2HDdHMVfKgz/5FJdlcYUDs17 3t1dxSASX+aMOfBzYOlYq1upXYL/hYXZ41ljA8sg3TlfhAhjGoP6DTF4o7q9VN5J6kp1 kPGXw0KkKiUZM/XyccjlPy9w5dW00VJygzlaiguLA85jJKO6Ne8kOJIRJbdcGfdgCCEC nqL7LG9f/9hVNgEEoMqT5wgqjHMYXF+QQUvmIn6ItmHW8+eM4Hgt2suD/TVhy5ov5h2U zbAg== X-Forwarded-Encrypted: i=1; AFNElJ+KsOL2JBeMxl3oV7r0qDCpB8OZy7IOyp2ZQosiAJUD8yjsihxIdahWOHuFbNgManLxy58zONFHuFzE1ICJlQ==@vger.kernel.org X-Gm-Message-State: AOJu0Yyx8Hfz+YWPNlC3WovWeA+5cVRsZKgiYWajaTmQgbMPhEXxdUiq eyg/xXuen3ntqhoqivhYc3bC2LkPPVdEoVv6u4yGDzGL9ZqvZs/aedqMcSX8cv3xEi8XG2dOMTF kFk/Sj3tU9qhcVdevifYkBaM/f+viC1qPTbEWHzleWMvpQnfF8xNFJMGHRCetsPQWGGO8QA== X-Gm-Gg: AeBDievigbvl3DTntytcS9pdidsJmBJ9DuLqop4/zztlgGhN/fQuP88YlDV8kusIXdL XL1SZHFd/ZpLvLBaq7Pj6ySkALfTAuXAKvVGdOUL0kxpuB+ilXBj+OoZ9aauGb9m8icOWDcrutk kueiZqivpBQdSloJqoCtHXsBQAJAioXETmxr4aDBnDSjRyeJZi1sQwq94lVYBCQcGVWDgADRmNr rncAQxtVqTcWErPWE81VIWEFbgjem3Ub2a8j22Ht1MFnjY8ovW8MXuGdRXUgFaQBqSnac3ikLco ZYRay5Pph6sgEaNyPQVWelxb5zHGIQCUKOQk/c3JtFujgsIRh2KXUamE1R9WCicdG9GwlDaoQ7E rXoSauRhJ5WAVpkVQ8KPEfCP6I8WS6YGDPmjPWNYdtzmI2LptLJTYnRxrbfpdwpFCDFE0fm3jpb f+CkZykK06HbFcLJRtMbuQMC3qey0= X-Received: by 2002:a05:6122:83c3:b0:56e:f262:9113 with SMTP id 71dfb90a1353d-573a574bd4emr1580860e0c.14.1777386209882; Tue, 28 Apr 2026 07:23:29 -0700 (PDT) X-Received: by 2002:a05:6122:83c3:b0:56e:f262:9113 with SMTP id 71dfb90a1353d-573a574bd4emr1580768e0c.14.1777386209190; Tue, 28 Apr 2026 07:23:29 -0700 (PDT) Received: from QCOM-eG0v1AUPpu.na.qualcomm.com ([2a01:e0a:830:450:653f:4d28:6a78:a6ca]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-bb80ba9b8c8sm107072666b.48.2026.04.28.07.23.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 28 Apr 2026 07:23:28 -0700 (PDT) From: Loic Poulain Date: Tue, 28 Apr 2026 16:23:12 +0200 Subject: [PATCH 7/9] Bluetooth: hci_sync: Add NVMEM-backed BD address retrieval Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260428-block-as-nvmem-v1-7-6ad23e75190a@oss.qualcomm.com> References: <20260428-block-as-nvmem-v1-0-6ad23e75190a@oss.qualcomm.com> In-Reply-To: <20260428-block-as-nvmem-v1-0-6ad23e75190a@oss.qualcomm.com> To: Ulf Hansson , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Bjorn Andersson , Konrad Dybcio , Jens Axboe , Johannes Berg , Jeff Johnson , Bartosz Golaszewski , Marcel Holtmann , Luiz Augusto von Dentz , Balakrishna Godavarthi , Rocky Liao , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman Cc: linux-mmc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-block@vger.kernel.org, linux-wireless@vger.kernel.org, ath10k@lists.infradead.org, linux-bluetooth@vger.kernel.org, netdev@vger.kernel.org, daniel@makrotopia.org, Loic Poulain X-Mailer: b4 0.14.2 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNDI4MDEzNiBTYWx0ZWRfX8y7XUCN9lzNZ i/QxVBnA8BjGRg+tt444OUR00bSoyM7f5ffE3VRkxTDXuqBkXTWRJJ+50qdtf+WWyLenoobEHcM lFUO2tiQlQ4vXmKNOPTNjri42oqoD0Pvzkhe4Z0O4sxYs6t6JT/eAjgHlYFBtIttMWOMHMkMlvI 9CSD+mDO2zXUCqIAtT/t46E6mdYkmM1FK/qL1ThsxdvOolr4SR/Z8bxZHjwFIgzniIg7VBLpQWp LZ9plMrtGzu0x0AKQN5f8C0mPqy9XGP238c57AEbffbFsqgE9gcKvLjhvzKNfV1jp0PlsiYHGML EzfRMAMaQAR9s88F4pcZvkotPYcKKqKrmHHGPGzKgpE30sBFih+Q5Lo+201vlMdp/dDtFrrSqNZ ND9cSdfu6LiSWJNKW1lsuJC3FUQNxEn6YMfbz1lmbKQPKHssAZGErF+iY7ohpW+MsRBfonw++Ca wVPvkSXpQKOOL8SM20g== X-Proofpoint-ORIG-GUID: c7bTDN1qbeV2TqCnD-eCExiQOL-Z98rD X-Proofpoint-GUID: c7bTDN1qbeV2TqCnD-eCExiQOL-Z98rD X-Authority-Analysis: v=2.4 cv=A45c+aWG c=1 sm=1 tr=0 ts=69f0c2e2 cx=c_pps a=JIY1xp/sjQ9K5JH4t62bdg==:117 a=xqWC_Br6kY4A:10 a=IkcTkHD0fZMA:10 a=A5OVakUREuEA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=DJpcGTmdVt4CTyJn9g5Z:22 a=EUspDBNiAAAA:8 a=teJl78XSWlBvCPfQsyoA:9 a=QEXdDO2ut3YA:10 a=tNoRWFLymzeba-QzToBc: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=2026-04-28_04,2026-04-28_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 suspectscore=0 impostorscore=0 phishscore=0 adultscore=0 priorityscore=1501 malwarescore=0 lowpriorityscore=0 bulkscore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604200000 definitions=main-2604280136 Some devices store the Bluetooth BD address in non-volatile memory, which can be accessed through the NVMEM framework. Similar to Ethernet or WiFi MAC addresses, add support for reading the BD address from a 'local-bd-address' NVMEM cell. As with the device-tree provided BD address, add a quirk to indicate whether a device or platform should attempt to read the address from NVMEM when no valid in-chip address is present. Also add a quirk to indicate if the address is stored in big-endian byte order. Signed-off-by: Loic Poulain --- include/net/bluetooth/hci.h | 18 +++++++++++++++ net/bluetooth/hci_sync.c | 56 ++++++++++++++++++++++++++++++++++++++++++++- 2 files changed, 73 insertions(+), 1 deletion(-) diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h index 572b1c620c5d653a1fe10b26c1b0ba33e8f4968f..7686466d1109253b0d75edeb5f6a99fb98ce4cc6 100644 --- a/include/net/bluetooth/hci.h +++ b/include/net/bluetooth/hci.h @@ -164,6 +164,24 @@ enum { */ HCI_QUIRK_BDADDR_PROPERTY_BROKEN, + /* When this quirk is set, the public Bluetooth address + * initially reported by HCI Read BD Address command + * is considered invalid. The public BD Address can be + * retrieved via a 'local-bd-address' NVMEM cell. + * + * This quirk can be set before hci_register_dev is called or + * during the hdev->setup vendor callback. + */ + HCI_QUIRK_USE_BDADDR_NVMEM, + + /* When this quirk is set, the Bluetooth Device Address provided by + * the 'local-bd-address' NVMEM is stored in big-endian order. + * + * This quirk can be set before hci_register_dev is called or + * during the hdev->setup vendor callback. + */ + HCI_QUIRK_BDADDR_NVMEM_BE, + /* When this quirk is set, the duplicate filtering during * scanning is based on Bluetooth devices addresses. To allow * RSSI based updates, restart scanning if needed. diff --git a/net/bluetooth/hci_sync.c b/net/bluetooth/hci_sync.c index fd3aacdea512a37c22b9a2be90c89ddca4b4d99f..f87cb6ae85c3a5754fe79f415ba05dd177f75fad 100644 --- a/net/bluetooth/hci_sync.c +++ b/net/bluetooth/hci_sync.c @@ -6,6 +6,7 @@ * Copyright 2023 NXP */ +#include #include #include @@ -3588,6 +3589,54 @@ int hci_powered_update_sync(struct hci_dev *hdev) return 0; } +/** + * hci_dev_get_bd_addr_from_nvmem - Get the Bluetooth Device Address + * (BD_ADDR) for a HCI device from + * an NVMEM cell. + * @hdev: The HCI device + * + * Search for 'local-bd-address' NVMEM cell. + * + * All-zero BD addresses are rejected (unprovisioned). + */ +static int hci_dev_get_bd_addr_from_nvmem(struct hci_dev *hdev) +{ + struct device *dev = hdev->dev.parent; + struct nvmem_cell *cell; + const void *ba; + int err = 0; + size_t len; + + cell = nvmem_cell_get(dev, "local-bd-address"); + if (IS_ERR(cell)) + return PTR_ERR(cell); + + ba = nvmem_cell_read(cell, &len); + nvmem_cell_put(cell); + + if (IS_ERR(ba)) { + bt_dev_warn(hdev, "Error reading BD address from NVMEM (%ld)\n", + PTR_ERR(ba)); + err = PTR_ERR(ba); + goto done; + } + + if (len != sizeof(bdaddr_t) || !bacmp(ba, BDADDR_ANY)) { + bt_dev_warn(hdev, "NVMEM BD address has incorrect format\n"); + err = -EINVAL; + goto done; + } + + if (hci_test_quirk(hdev, HCI_QUIRK_BDADDR_NVMEM_BE)) + baswap(&hdev->public_addr, (bdaddr_t *)ba); + else + bacpy(&hdev->public_addr, (bdaddr_t *)ba); + +done: + kfree(ba); + return err; +} + /** * hci_dev_get_bd_addr_from_property - Get the Bluetooth Device Address * (BD_ADDR) for a HCI device from @@ -5042,12 +5091,17 @@ static int hci_dev_setup_sync(struct hci_dev *hdev) * its setup callback. */ invalid_bdaddr = hci_test_quirk(hdev, HCI_QUIRK_INVALID_BDADDR) || - hci_test_quirk(hdev, HCI_QUIRK_USE_BDADDR_PROPERTY); + hci_test_quirk(hdev, HCI_QUIRK_USE_BDADDR_PROPERTY) || + hci_test_quirk(hdev, HCI_QUIRK_USE_BDADDR_NVMEM); if (!ret) { if (hci_test_quirk(hdev, HCI_QUIRK_USE_BDADDR_PROPERTY) && !bacmp(&hdev->public_addr, BDADDR_ANY)) hci_dev_get_bd_addr_from_property(hdev); + if (hci_test_quirk(hdev, HCI_QUIRK_USE_BDADDR_NVMEM) && + !bacmp(&hdev->public_addr, BDADDR_ANY)) + hci_dev_get_bd_addr_from_nvmem(hdev); + if (invalid_bdaddr && bacmp(&hdev->public_addr, BDADDR_ANY) && hdev->set_bdaddr) { ret = hdev->set_bdaddr(hdev, &hdev->public_addr); -- 2.34.1