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[109.43.113.198]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3a53244f516sm1671874f8f.74.2025.06.06.05.07.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 06 Jun 2025 05:07:14 -0700 (PDT) From: Abd-Alrhman Masalkhi To: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org Cc: arnd@arndb.de, gregkh@linuxfoundation.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, abd.masalkhi@gmail.com Subject: [PATCH v3 1/3] dt-bindings: eeprom: Add ST M24LR support Date: Fri, 6 Jun 2025 12:06:29 +0000 Message-ID: <20250606120631.3140054-2-abd.masalkhi@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250606120631.3140054-1-abd.masalkhi@gmail.com> References: <20250606120631.3140054-1-abd.masalkhi@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Add support for STMicroelectronics M24LR RFID/NFC EEPROM chips. These devices use two I2C addresses: the primary address provides access to control and system parameter registers, while the secondary address is used for EEPROM access. Signed-off-by: Abd-Alrhman Masalkhi --- Changes in v3: - Dropped reference to the i2c-mux binding. - Added reference to the nvmem binding to reflect EEPROM usage. - Updated 'reg' property to represent the device using two I2C addresses. - Fixed DT schema errors and yamllint warnings. - Removed the unused 'pagesize' property. --- .../devicetree/bindings/misc/st,m24lr.yaml | 54 +++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 Documentation/devicetree/bindings/misc/st,m24lr.yaml diff --git a/Documentation/devicetree/bindings/misc/st,m24lr.yaml b/Documentation/devicetree/bindings/misc/st,m24lr.yaml new file mode 100644 index 000000000000..775d218381b7 --- /dev/null +++ b/Documentation/devicetree/bindings/misc/st,m24lr.yaml @@ -0,0 +1,54 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/misc/st,m24lr.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: STMicroelectronics M24LR NFC/RFID EEPROM + +maintainers: + - Abd-Alrhman Masalkhi + +description: + STMicroelectronics M24LR series are dual-interface (RF + I2C) + EEPROM chips. These devices support I2C-based access to both + memory and a system area that controls authentication and configuration. + They expose two I2C addresses, one for the system parameter sector and + one for the EEPROM. + +allOf: + - $ref: /schemas/nvmem/nvmem.yaml# + +properties: + compatible: + enum: + - st,m24lr04e-r + - st,m24lr16e-r + - st,m24lr64e-r + + reg: + description: + Two I2C address, the primary for control registers, the secondary + for EEPROM access. + minItems: 2 + maxItems: 2 + +required: + - compatible + - reg + +unevaluatedProperties: false + +examples: + - | + i2c { + #address-cells = <1>; + #size-cells = <0>; + + eeprom@57 { + compatible = "st,m24lr04e-r"; + reg = <0x57>, /* primary-device */ + <0x53>; /* secondary-device */ + }; + }; +... -- 2.43.0