mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
128 lines
3.2 KiB
128 lines
3.2 KiB
# 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 compatible with Atmel's AT25 |
|
|
|
maintainers: |
|
- Christian Eggers <[email protected]> |
|
|
|
properties: |
|
$nodename: |
|
pattern: "^eeprom@[0-9a-f]{1,2}$" |
|
|
|
# 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 |
|
|
|
- const: atmel,at25 |
|
|
|
# Please don't use this alternative for new bindings. |
|
- items: |
|
- const: atmel,at25 |
|
|
|
reg: |
|
maxItems: 1 |
|
|
|
spi-max-frequency: true |
|
|
|
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. |
|
|
|
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 |
|
- pagesize |
|
- size |
|
- address-width |
|
|
|
additionalProperties: false |
|
|
|
examples: |
|
- | |
|
#include <dt-bindings/gpio/gpio.h> |
|
spi0 { |
|
#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>; |
|
}; |
|
};
|
|
|