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1# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause2%YAML 1.23---4$id: http://devicetree.org/schemas/eeprom/at25.yaml#5$schema: http://devicetree.org/meta-schemas/core.yaml#6 7title: SPI EEPROMs or FRAMs compatible with Atmel's AT258 9maintainers:10 - Christian Eggers <ceggers@arri.de>11 12properties:13 $nodename:14 anyOf:15 - pattern: "^eeprom@[0-9a-f]{1,2}$"16 - pattern: "^fram@[0-9a-f]{1,2}$"17 18 # There are multiple known vendors who manufacture EEPROM chips compatible19 # with Atmel's AT25. The compatible string requires two items where the20 # 'vendor' and 'model' parts of the first are the actual chip and the second21 # item is fixed to "atmel,at25". Some existing bindings only have the22 # "atmel,at25" part and should be fixed by somebody who knows vendor and23 # product.24 compatible:25 oneOf:26 - items:27 - enum:28 - anvo,anv32e61w29 - atmel,at25256B30 - fujitsu,mb85rs1mt31 - fujitsu,mb85rs25632 - fujitsu,mb85rs6433 - microchip,at25160bn34 - microchip,25lc04035 - st,m95m0236 - st,m9525637 - st,m9564038 - cypress,fm2539 40 - const: atmel,at2541 42 # Please don't use this alternative for new bindings.43 - items:44 - const: atmel,at2545 46 reg:47 maxItems: 148 49 pagesize:50 $ref: /schemas/types.yaml#/definitions/uint3251 enum: [1, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536, 131072]52 description:53 Size of the eeprom page. FRAMs don't have pages.54 55 size:56 $ref: /schemas/types.yaml#/definitions/uint3257 description:58 Total eeprom size in bytes.59 60 address-width:61 $ref: /schemas/types.yaml#/definitions/uint3262 enum: [ 8, 9, 16, 24 ]63 description:64 Number of address bits.65 For 9 bits, the MSB of the address is sent as bit 3 of the instruction66 byte, before the address byte.67 68 spi-cpha: true69 70 spi-cpol: true71 72 read-only:73 description:74 Disable writes to the eeprom.75 type: boolean76 77 wp-gpios:78 maxItems: 179 description:80 GPIO to which the write-protect pin of the chip is connected.81 82 # Deprecated: at25,byte-len, at25,addr-mode, at25,page-size83 at25,byte-len:84 $ref: /schemas/types.yaml#/definitions/uint3285 description:86 Total eeprom size in bytes. Deprecated, use "size" property instead.87 deprecated: true88 89 at25,addr-mode:90 $ref: /schemas/types.yaml#/definitions/uint3291 description:92 Addr-mode flags, as defined in include/linux/spi/eeprom.h.93 Deprecated, use "address-width" property instead.94 deprecated: true95 96 at25,page-size:97 $ref: /schemas/types.yaml#/definitions/uint3298 description:99 Size of the eeprom page. Deprecated, use "pagesize" property instead.100 deprecated: true101 102required:103 - compatible104 - reg105 - spi-max-frequency106 107allOf:108 - $ref: /schemas/spi/spi-peripheral-props.yaml#109 - $ref: /schemas/nvmem/nvmem.yaml110 - if:111 properties:112 compatible:113 not:114 contains:115 const: cypress,fm25116 then:117 required:118 - pagesize119 - size120 - address-width121 122unevaluatedProperties: false123 124examples:125 - |126 #include <dt-bindings/gpio/gpio.h>127 spi {128 #address-cells = <1>;129 #size-cells = <0>;130 131 eeprom@0 {132 compatible = "st,m95256", "atmel,at25";133 reg = <0>;134 spi-max-frequency = <5000000>;135 spi-cpha;136 spi-cpol;137 wp-gpios = <&gpio1 3 0>;138 139 pagesize = <64>;140 size = <32768>;141 address-width = <16>;142 };143 144 fram@1 {145 compatible = "cypress,fm25", "atmel,at25";146 reg = <1>;147 spi-max-frequency = <40000000>;148 };149 };150