# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause %YAML 1.2 --- $id: http://devicetree.org/schemas/eeprom/at25.yaml# $schema: http://devicetree.org/meta-schemas/core.yaml# title: SPI EEPROMs or FRAMs compatible with Atmel's AT25 maintainers: - Christian Eggers properties: $nodename: anyOf: - pattern: "^eeprom@[0-9a-f]{1,2}$" - pattern: "^fram@[0-9a-f]{1,2}$" # There are multiple known vendors who manufacture EEPROM chips compatible # with Atmel's AT25. The compatible string requires two items where the # 'vendor' and 'model' parts of the first are the actual chip and the second # item is fixed to "atmel,at25". Some existing bindings only have the # "atmel,at25" part and should be fixed by somebody who knows vendor and # product. compatible: oneOf: - items: - enum: - anvo,anv32e61w - atmel,at25256B - fujitsu,mb85rs1mt - fujitsu,mb85rs64 - microchip,at25160bn - microchip,25lc040 - st,m95m02 - st,m95256 - st,m95640 - cypress,fm25 - const: atmel,at25 # Please don't use this alternative for new bindings. - items: - const: atmel,at25 reg: maxItems: 1 pagesize: $ref: /schemas/types.yaml#/definitions/uint32 enum: [1, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536, 131072] description: Size of the eeprom page. FRAMs don't have pages. size: $ref: /schemas/types.yaml#/definitions/uint32 description: Total eeprom size in bytes. address-width: $ref: /schemas/types.yaml#/definitions/uint32 enum: [ 8, 9, 16, 24 ] description: Number of address bits. For 9 bits, the MSB of the address is sent as bit 3 of the instruction byte, before the address byte. spi-cpha: true spi-cpol: true read-only: description: Disable writes to the eeprom. type: boolean wp-gpios: maxItems: 1 description: GPIO to which the write-protect pin of the chip is connected. # Deprecated: at25,byte-len, at25,addr-mode, at25,page-size at25,byte-len: $ref: /schemas/types.yaml#/definitions/uint32 description: Total eeprom size in bytes. Deprecated, use "size" property instead. deprecated: true at25,addr-mode: $ref: /schemas/types.yaml#/definitions/uint32 description: Addr-mode flags, as defined in include/linux/spi/eeprom.h. Deprecated, use "address-width" property instead. deprecated: true at25,page-size: $ref: /schemas/types.yaml#/definitions/uint32 description: Size of the eeprom page. Deprecated, use "pagesize" property instead. deprecated: true required: - compatible - reg - spi-max-frequency allOf: - $ref: /schemas/spi/spi-peripheral-props.yaml# - $ref: /schemas/nvmem/nvmem.yaml - if: properties: compatible: not: contains: const: cypress,fm25 then: required: - pagesize - size - address-width unevaluatedProperties: false examples: - | #include spi { #address-cells = <1>; #size-cells = <0>; eeprom@0 { compatible = "st,m95256", "atmel,at25"; reg = <0>; spi-max-frequency = <5000000>; spi-cpha; spi-cpol; wp-gpios = <&gpio1 3 0>; pagesize = <64>; size = <32768>; address-width = <16>; }; fram@1 { compatible = "cypress,fm25", "atmel,at25"; reg = <1>; spi-max-frequency = <40000000>; }; };