tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/nvmem/nvmem.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: NVMEM (Non Volatile Memory) Device Tree Bindings
8
9maintainers:
10 - Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
11
12description: |
13 This binding is intended to represent the location of hardware
14 configuration data stored in NVMEMs like eeprom, efuses and so on.
15
16 On a significant proportion of boards, the manufacturer has stored
17 some data on NVMEM, for the OS to be able to retrieve these
18 information and act upon it. Obviously, the OS has to know about
19 where to retrieve these data from, and where they are stored on the
20 storage device.
21
22properties:
23 $nodename:
24 pattern: "^(eeprom|efuse|nvram)(@.*|-[0-9a-f])*$"
25
26 "#address-cells":
27 const: 1
28
29 "#size-cells":
30 const: 1
31
32 read-only:
33 $ref: /schemas/types.yaml#/definitions/flag
34 description:
35 Mark the provider as read only.
36
37patternProperties:
38 "^.*@[0-9a-f]+$":
39 type: object
40
41 properties:
42 reg:
43 maxItems: 1
44 description:
45 Offset and size in bytes within the storage device.
46
47 bits:
48 maxItems: 1
49 items:
50 items:
51 - minimum: 0
52 maximum: 7
53 description:
54 Offset in bit within the address range specified by reg.
55 - minimum: 1
56 description:
57 Size in bit within the address range specified by reg.
58
59 required:
60 - reg
61
62 additionalProperties: false
63
64examples:
65 - |
66 qfprom: eeprom@700000 {
67 #address-cells = <1>;
68 #size-cells = <1>;
69
70 /* ... */
71
72 /* Data cells */
73 tsens_calibration: calib@404 {
74 reg = <0x404 0x10>;
75 };
76
77 tsens_calibration_bckp: calib_bckp@504 {
78 reg = <0x504 0x11>;
79 bits = <6 128>;
80 };
81
82 pvs_version: pvs-version@6 {
83 reg = <0x6 0x2>;
84 bits = <7 2>;
85 };
86
87 speed_bin: speed-bin@c{
88 reg = <0xc 0x1>;
89 bits = <2 3>;
90 };
91 };
92
93...