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46b4ddd2c4
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 <abd.masalkhi@gmail.com> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Link: https://lore.kernel.org/r/20250717063934.5083-2-abd.masalkhi@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
53 lines
1.2 KiB
YAML
53 lines
1.2 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/eeprom/st,m24lr.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: STMicroelectronics M24LR NFC/RFID EEPROM
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maintainers:
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- Abd-Alrhman Masalkhi <abd.masalkhi@gmail.com>
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description:
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STMicroelectronics M24LR series are dual-interface (RF + I2C)
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EEPROM chips. These devices support I2C-based access to both
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memory and a system area that controls authentication and configuration.
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They expose two I2C addresses, one for the system parameter sector and
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one for the EEPROM.
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allOf:
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- $ref: /schemas/nvmem/nvmem.yaml#
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properties:
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compatible:
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enum:
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- st,m24lr04e-r
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- st,m24lr16e-r
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- st,m24lr64e-r
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reg:
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items:
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- description: I2C address used for control/system registers
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- description: I2C address used for EEPROM memory access
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required:
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- compatible
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- reg
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unevaluatedProperties: false
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examples:
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- |
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i2c {
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#address-cells = <1>;
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#size-cells = <0>;
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eeprom@57 {
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compatible = "st,m24lr04e-r";
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reg = <0x57>, /* primary-device */
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<0x53>; /* secondary-device */
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};
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};
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...
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