From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wr1-f49.google.com (mail-wr1-f49.google.com [209.85.221.49]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1CDF117BCE; Sun, 6 Jul 2025 10:53:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.221.49 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751799213; cv=none; b=uhj8g3HCERy/7gaYP8ikSheyQ6onvEkLwiw+2Cm0Df3duNnEDUbiJRCDtzKJSHAOhEFMh6wXcBiNQ1WbKCKM5RljZTIddK3UJVI5aX7ezomnQDHWBmx5ixukeh3U24XHMcfc0gCoHPx71byNnXXxbzoheMJcwgat2M5/mpBBdAg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751799213; c=relaxed/simple; bh=hO91axIELC89D5o2swhCKNlygBueJYLWBNu0MZg03oQ=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=b70lFfhOpuyKVoXSeVzM0A1GOjU5IuCyAF0pJzvOruHbODS3X+THZryNHsooDEdRzS7cyWIZ4kwytF8QNxKVU01ovJtEFtzxl/a+PczXGj9MICdZ1hgsr58XWm3EfO+mi/hUlXRb+TfHSgnKgjDDZF6kmvAkBe94v+YXAFmIO5k= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=KGp/Wq4D; arc=none smtp.client-ip=209.85.221.49 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="KGp/Wq4D" Received: by mail-wr1-f49.google.com with SMTP id ffacd0b85a97d-3a4f72cba73so2054345f8f.1; Sun, 06 Jul 2025 03:53:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1751799210; x=1752404010; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=Rl5aIDFBl7BfHLUk8Y1FaZt5D9KfnVPhh08Fkw39vp8=; b=KGp/Wq4DKHaXO86Leg/ifGzLh1zg+XQeTDA1Iahr5rtGlUGFy1gaGAiW3RV7x1SUIz GYb3qojfhSBxEmIVduR5rTc/fKVXfV+bIP8CFGKW3azxEuFfi8myxAtTCbvVJ+Cp1v9B fs6n1GWVnlFFvLt3ZahEdkYtb5bU4GLjRA8CgbO3TMUb471n1Qy2bT+c/J64FJptF1Cz aAZAY5zhpUV4lzIVjIZx/BWGrkoUNo+HrTJnzEu4rcxKfgjk1bpOfBDtxQLa44SynXjR vgZo9Eesibe6lU1qlhw8jmLzD7sL5CHC1OkBnq8PhtCabU8ElTXjKh8eYTIvhYbf5ftn wzYA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1751799210; x=1752404010; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=Rl5aIDFBl7BfHLUk8Y1FaZt5D9KfnVPhh08Fkw39vp8=; b=vDcQfASAjcgH90mVNQLyJMy9budwjqtSzGkDYY+mgr7cQCuwBMZuTjmInWHCOTeuI6 HSiYoWAobZOvjikJ/wJgrpQPwt/n+K2lZk+PkkuCsLI3T0OMyBc2OFUk55H+2HlVS27e HE+R8wSGxyhcaQxtzZtelsnzIp8s8iXsOIpXXMLnEx7ai9KhBVz6KYU9ccl6yvggxfgl Eh79WZXsAcwYthn2gzLVoHDFHBZHzmmf5Kd70fHvLNxc0Uzgux6ClGUEMitz83Su8pVF boZDYFy3RRb5hMrd8CxUvYcDZIuwYYqIsMwpG0VROBBw+H0dqa8TfxGHARv4DZk+wD3Z SNYw== X-Forwarded-Encrypted: i=1; AJvYcCVcMW7nh6Wk8NXqAD6+yLTo22F/+vBQWC6xfGp8/rjlORh910eh0Y2/0zJgSya5XUP+YvZNxq/VBWHVO3Ku@vger.kernel.org, AJvYcCXN6ifh4L8JlHMy9jUPtOG2MjmUu93Lcit0MqKqlPDizrLUbpu1I5/AU3IybNzuBS6MnhPyTEConZ5m@vger.kernel.org X-Gm-Message-State: AOJu0YziuJ1nLFbPTbHHAOaND8FFwXnh2bDtJQucfAY+C3rFadrCiZMv c9eCSCN+L/+icaqJm9+Q+ck0bDVJeoD91W8cdLcu0OvbiUNQ/y5aovio X-Gm-Gg: ASbGncuMEfMsC+Igs4bZibdlmqU6Jb+qAmypIa/9lmhU1Z6QM8nTnXcBY/i5jt8NYGV foULa6pQQ6HqCNrv5uQrJ5rGpy/CkX5FCkOKamzamt89BPom7PPvO61sNXekypavToZeYlLGfkk C85jsZlPAZ1DfX04mHXVKjCEUKO9bdJ+CbaA7JRwnfKF5t4cLVel86lG7HLrzzUaHXmh4LxRomV 5qVKJIQaoqCSbpLMX8NY1UH6+WFpnoH2H400B1x3WfRRJjfIc+/PczuLG1ZR7GkrbaPYom2EUwa E0HFTtql47IWKZJvHYW2UiTN5Lyb7Fx/nLNdtErQwHgQ0O6idKUWwwSkbNx2eGAo1G8uLLRaFRD l5/8rtjSatMNx3sBIJQ== X-Google-Smtp-Source: AGHT+IEQPZxKSHEU6v6YjdCk3jMRA9LfzHcP+l2NaDcRx2syaWwk1uY2E6C4p46eeU1lYX6rRjeJIw== X-Received: by 2002:a05:600c:56cb:b0:440:69f5:f179 with SMTP id 5b1f17b1804b1-454b1f4fb49mr62520655e9.7.1751799210219; Sun, 06 Jul 2025 03:53:30 -0700 (PDT) Received: from masalkhi.. (pd907d170.dip0.t-ipconnect.de. [217.7.209.112]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-454b1634147sm80283985e9.18.2025.07.06.03.53.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 06 Jul 2025 03:53:29 -0700 (PDT) From: Abd-Alrhman Masalkhi To: arnd@arndb.de, gregkh@linuxfoundation.org, robh@kernel.org, krzk+dt@kernel.org Cc: conor+dt@kernel.org, luoyifan@cmss.chinamobile.com, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, christophe.jaillet@wanadoo.fr, abd.masalkhi@gmail.com Subject: [PATCH v6 0/3] Add support for STMicroelectronics M24LR EEPROM/NFC chips Date: Sun, 6 Jul 2025 10:53:08 +0000 Message-ID: <20250706105311.395162-1-abd.masalkhi@gmail.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit This patch series adds support for the STMicroelectronics M24LR series RFID/NFC EEPROM devices. These chips expose two I2C addresses: the primary one provides access to system control and configuration registers, while the secondary address is used for EEPROM access. The driver implements both functionalities: - A sysfs-based interface for the control and system parameter registers. - EEPROM access via the nvmem subsystem using a secondary I2C dummy client. Tested on: M24LR04E-R using Yocto on Raspberry Pi 4 Signed-off-by: Abd-Alrhman Masalkhi Abd-Alrhman Masalkhi (3): dt-bindings: eeprom: Add ST M24LR support eeprom: add driver for ST M24LR series RFID/NFC EEPROM chips ABI: sysfs: add documentation for ST M24LR EEPROM and control interface .../ABI/testing/sysfs-bus-i2c-devices-m24lr | 100 +++ .../devicetree/bindings/eeprom/st,m24lr.yaml | 52 ++ drivers/misc/eeprom/Kconfig | 18 + drivers/misc/eeprom/Makefile | 1 + drivers/misc/eeprom/m24lr.c | 662 ++++++++++++++++++ 5 files changed, 833 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-bus-i2c-devices-m24lr create mode 100644 Documentation/devicetree/bindings/eeprom/st,m24lr.yaml create mode 100644 drivers/misc/eeprom/m24lr.c -- 2.43.0