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diff --git a/Bindings/eeprom/at24.yaml b/Bindings/eeprom/at24.yaml
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+# SPDX-License-Identifier: GPL-2.0-only
+# Copyright 2019 BayLibre SAS
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/eeprom/at24.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: I2C EEPROMs compatible with Atmel's AT24
+
+maintainers:
+ - Bartosz Golaszewski <bgolaszewski@baylibre.com>
+
+allOf:
+ - $ref: /schemas/nvmem/nvmem.yaml
+ - $ref: /schemas/nvmem/nvmem-deprecated-cells.yaml
+
+select:
+ properties:
+ compatible:
+ contains:
+ pattern: "^atmel,(24(c|cs|mac)[0-9]+|spd)$"
+ required:
+ - compatible
+
+properties:
+ $nodename:
+ pattern: "^eeprom@[0-9a-f]{1,2}$"
+
+ # There are multiple known vendors who manufacture EEPROM chips compatible
+ # with Atmel's AT24. The compatible string requires either a single item
+ # if the memory comes from Atmel (in which case the vendor part must be
+ # 'atmel') or two items with the same 'model' part where the vendor part of
+ # the first one is the actual manufacturer and the second item is the
+ # corresponding 'atmel,<model>' from Atmel.
+ compatible:
+ oneOf:
+ - allOf:
+ - minItems: 1
+ items:
+ - pattern: "^(atmel|catalyst|microchip|nxp|ramtron|renesas|rohm|st),(24(c|cs|lc|mac)[0-9]+|spd)$"
+ - pattern: "^atmel,(24(c|cs|mac)[0-9]+|spd)$"
+ - oneOf:
+ - items:
+ pattern: c00$
+ - items:
+ pattern: c01$
+ - items:
+ pattern: cs01$
+ - items:
+ pattern: c02$
+ - items:
+ pattern: cs02$
+ - items:
+ pattern: mac402$
+ - items:
+ pattern: mac602$
+ - items:
+ pattern: c04$
+ - items:
+ pattern: cs04$
+ - items:
+ pattern: c08$
+ - items:
+ pattern: cs08$
+ - items:
+ pattern: c16$
+ - items:
+ pattern: cs16$
+ - items:
+ pattern: c32$
+ - items:
+ pattern: c32d-wl$
+ - items:
+ pattern: cs32$
+ - items:
+ pattern: c64$
+ - items:
+ pattern: c64d-wl$
+ - items:
+ pattern: cs64$
+ - items:
+ pattern: c128$
+ - items:
+ pattern: cs128$
+ - items:
+ pattern: c256$
+ - items:
+ pattern: cs256$
+ - items:
+ pattern: c512$
+ - items:
+ pattern: cs512$
+ - items:
+ pattern: c1024$
+ - items:
+ pattern: cs1024$
+ - items:
+ pattern: c1025$
+ - items:
+ pattern: cs1025$
+ - items:
+ pattern: c2048$
+ - items:
+ pattern: cs2048$
+ - items:
+ pattern: spd$
+ # These are special cases that don't conform to the above pattern.
+ # Each requires a standard at24 model as fallback.
+ - items:
+ - const: belling,bl24c16a
+ - const: atmel,24c16
+ - items:
+ - enum:
+ - rohm,br24g01
+ - rohm,br24t01
+ - const: atmel,24c01
+ - items:
+ - enum:
+ - nxp,se97b
+ - renesas,r1ex24002
+ - const: atmel,24c02
+ - items:
+ - enum:
+ - onnn,cat24c04
+ - onnn,cat24c05
+ - const: atmel,24c04
+ - items:
+ - const: renesas,r1ex24016
+ - const: atmel,24c16
+ - items:
+ - const: giantec,gt24c32a
+ - const: atmel,24c32
+ - items:
+ - enum:
+ - renesas,r1ex24128
+ - samsung,s524ad0xd1
+ - const: atmel,24c128
+
+ label:
+ description: Descriptive name of the EEPROM.
+
+ reg:
+ maxItems: 1
+
+ pagesize:
+ description:
+ The length of the pagesize for writing. Please consult the
+ manual of your device, that value varies a lot. A wrong value
+ may result in data loss! If not specified, a safety value of
+ '1' is used which will be very slow.
+ $ref: /schemas/types.yaml#/definitions/uint32
+ enum: [1, 8, 16, 32, 64, 128, 256]
+ default: 1
+
+ read-only:
+ $ref: /schemas/types.yaml#/definitions/flag
+ description:
+ Disables writes to the eeprom.
+
+ size:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description:
+ Total eeprom size in bytes.
+
+ no-read-rollover:
+ $ref: /schemas/types.yaml#/definitions/flag
+ description:
+ Indicates that the multi-address eeprom does not automatically roll
+ over reads to the next slave address. Please consult the manual of
+ your device.
+
+ wp-gpios: true
+
+ address-width:
+ description:
+ Number of address bits.
+ $ref: /schemas/types.yaml#/definitions/uint32
+ default: 8
+ enum: [ 8, 16 ]
+
+ num-addresses:
+ description:
+ Total number of i2c slave addresses this device takes.
+ $ref: /schemas/types.yaml#/definitions/uint32
+ default: 1
+ minimum: 1
+ maximum: 8
+
+ vcc-supply:
+ description:
+ phandle of the regulator that provides the supply voltage.
+
+required:
+ - compatible
+ - reg
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ eeprom@52 {
+ compatible = "microchip,24c32", "atmel,24c32";
+ reg = <0x52>;
+ pagesize = <32>;
+ wp-gpios = <&gpio1 3 0>;
+ num-addresses = <8>;
+ };
+ };
+...
diff --git a/Bindings/eeprom/at25.yaml b/Bindings/eeprom/at25.yaml
new file mode 100644
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+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$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 <ceggers@arri.de>
+
+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#
+ - $ref: /schemas/nvmem/nvmem.yaml
+ - if:
+ properties:
+ compatible:
+ not:
+ contains:
+ const: cypress,fm25
+ then:
+ required:
+ - pagesize
+ - size
+ - address-width
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+ spi {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ eeprom@0 {
+ compatible = "st,m95256", "atmel,at25";
+ reg = <0>;
+ spi-max-frequency = <5000000>;
+ spi-cpha;
+ spi-cpol;
+ wp-gpios = <&gpio1 3 0>;
+
+ pagesize = <64>;
+ size = <32768>;
+ address-width = <16>;
+ };
+
+ fram@1 {
+ compatible = "cypress,fm25", "atmel,at25";
+ reg = <1>;
+ spi-max-frequency = <40000000>;
+ };
+ };
diff --git a/Bindings/eeprom/microchip,93lc46b.yaml b/Bindings/eeprom/microchip,93lc46b.yaml
new file mode 100644
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+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/eeprom/microchip,93lc46b.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Microchip 93xx46 SPI compatible EEPROM family
+
+maintainers:
+ - Cory Tusar <cory.tusar@pid1solutions.com>
+
+properties:
+ compatible:
+ enum:
+ - atmel,at93c46
+ - atmel,at93c46d
+ - atmel,at93c56
+ - atmel,at93c66
+ - eeprom-93xx46
+ - microchip,93lc46b
+
+ data-size:
+ description: number of data bits per word
+ $ref: /schemas/types.yaml#/definitions/uint32
+ enum: [8, 16]
+
+ reg:
+ description: chip select of EEPROM
+ maxItems: 1
+
+ read-only:
+ description:
+ parameter-less property which disables writes to the EEPROM
+ type: boolean
+
+ select-gpios:
+ description:
+ specifies the GPIO that needs to be asserted prior to each access
+ of EEPROM (e.g. for SPI bus multiplexing)
+ maxItems: 1
+
+required:
+ - compatible
+ - reg
+ - data-size
+ - spi-max-frequency
+
+allOf:
+ - $ref: /schemas/spi/spi-peripheral-props.yaml#
+ - $ref: /schemas/nvmem/nvmem.yaml
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+
+ spi {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ eeprom@0 {
+ compatible = "eeprom-93xx46";
+ reg = <0>;
+ spi-max-frequency = <1000000>;
+ spi-cs-high;
+ data-size = <8>;
+ select-gpios = <&gpio4 4 GPIO_ACTIVE_HIGH>;
+ };
+ };