1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/mtd/mtd.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: MTD (Memory Technology Device) Device Tree Bindings
8
9 maintainers:
10 - Miquel Raynal <miquel.raynal@bootlin.com>
11 - Richard Weinberger <richard@nod.at>
12
13 properties:
14 $nodename:
15 pattern: "^flash(@.*)?$"
16
17 label:
18 description:
19 User-defined MTD device name. Can be used to assign user friendly
20 names to MTD devices (instead of the flash model or flash controller
21 based name) in order to ease flash device identification and/or
22 describe what they are used for.
23
24 patternProperties:
25 "^otp(-[0-9]+)?$":
26 type: object
27 $ref: ../nvmem/nvmem.yaml#
28
29 description: |
30 An OTP memory region. Some flashes provide a one-time-programmable
31 memory whose content can either be programmed by a user or is already
32 pre-programmed by the factory. Some flashes might provide both.
33
34 properties:
35 compatible:
36 enum:
37 - user-otp
38 - factory-otp
39
40 required:
41 - compatible
42
43 additionalProperties: true
44
45 examples:
46 - |
47 spi {
48 #address-cells = <1>;
49 #size-cells = <0>;
50
51 flash@0 {
52 reg = <0>;
53 compatible = "jedec,spi-nor";
54 label = "System-firmware";
55 };
56 };
57
58 - |
59 spi {
60 #address-cells = <1>;
61 #size-cells = <0>;
62
63 flash@0 {
64 reg = <0>;
65 compatible = "jedec,spi-nor";
66
67 otp-1 {
68 compatible = "factory-otp";
69 #address-cells = <1>;
70 #size-cells = <1>;
71
72 electronic-serial-number@0 {
73 reg = <0 8>;
74 };
75 };
76
77 otp-2 {
78 compatible = "user-otp";
79 #address-cells = <1>;
80 #size-cells = <1>;
81
82 mac-address@0 {
83 reg = <0 6>;
84 };
85 };
86 };
87 };
88
89 ...
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