1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-C
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/nvmem/nvmem
5 $schema: http://devicetree.org/meta-schemas/co
6
7 title: NVMEM (Non Volatile Memory)
8
9 maintainers:
10 - Srinivas Kandagatla <srinivas.kandagatla@li
11
12 description: |
13 This binding is intended to represent the lo
14 configuration data stored in NVMEMs like eep
15
16 On a significant proportion of boards, the m
17 some data on NVMEM, for the OS to be able to
18 information and act upon it. Obviously, the
19 where to retrieve these data from, and where
20 storage device.
21
22 properties:
23 "#address-cells":
24 const: 1
25
26 "#size-cells":
27 const: 1
28
29 read-only:
30 $ref: /schemas/types.yaml#/definitions/fla
31 description:
32 Mark the provider as read only.
33
34 wp-gpios:
35 description:
36 GPIO to which the write-protect pin of t
37 The write-protect GPIO is asserted, when
38 (logical '1') to block the write operati
39 when it's driven low (logical '0') to al
40 maxItems: 1
41
42 nvmem-layout:
43 $ref: /schemas/nvmem/layouts/nvmem-layout.
44 description:
45 Alternative to the statically defined nv
46 container may reference more advanced (d
47 parsers.
48
49 additionalProperties: true
50
51 examples:
52 - |
53 #include <dt-bindings/gpio/gpio.h>
54
55 qfprom: eeprom@700000 {
56 compatible = "qcom,msm8974-qfprom",
57 #address-cells = <1>;
58 #size-cells = <1>;
59 reg = <0x00700000 0x100000>;
60
61 wp-gpios = <&gpio1 3 GPIO_ACTIVE_HIG
62
63 /* ... */
64
65 nvmem-layout {
66 compatible = "fixed-layout";
67 #address-cells = <1>;
68 #size-cells = <1>;
69
70 /* Data cells */
71 tsens_calibration: calib@404 {
72 reg = <0x404 0x10>;
73 };
74
75 tsens_calibration_bckp: calib_bc
76 reg = <0x504 0x11>;
77 bits = <6 128>;
78 };
79
80 pvs_version: pvs-version@6 {
81 reg = <0x6 0x2>;
82 bits = <7 2>;
83 };
84
85 speed_bin: speed-bin@c{
86 reg = <0xc 0x1>;
87 bits = <2 3>;
88 };
89 };
90 };
91
92 ...
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