1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-C 1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2 %YAML 1.2 2 %YAML 1.2
3 --- 3 ---
4 $id: http://devicetree.org/schemas/nvmem/nvmem 4 $id: http://devicetree.org/schemas/nvmem/nvmem.yaml#
5 $schema: http://devicetree.org/meta-schemas/co 5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6 6
7 title: NVMEM (Non Volatile Memory) 7 title: NVMEM (Non Volatile Memory)
8 8
9 maintainers: 9 maintainers:
10 - Srinivas Kandagatla <srinivas.kandagatla@li 10 - Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
11 11
12 description: | 12 description: |
13 This binding is intended to represent the lo 13 This binding is intended to represent the location of hardware
14 configuration data stored in NVMEMs like eep 14 configuration data stored in NVMEMs like eeprom, efuses and so on.
15 15
16 On a significant proportion of boards, the m 16 On a significant proportion of boards, the manufacturer has stored
17 some data on NVMEM, for the OS to be able to 17 some data on NVMEM, for the OS to be able to retrieve these
18 information and act upon it. Obviously, the 18 information and act upon it. Obviously, the OS has to know about
19 where to retrieve these data from, and where 19 where to retrieve these data from, and where they are stored on the
20 storage device. 20 storage device.
21 21
22 properties: 22 properties:
23 "#address-cells": 23 "#address-cells":
24 const: 1 24 const: 1
25 25
26 "#size-cells": 26 "#size-cells":
27 const: 1 27 const: 1
28 28
29 read-only: 29 read-only:
30 $ref: /schemas/types.yaml#/definitions/fla 30 $ref: /schemas/types.yaml#/definitions/flag
31 description: 31 description:
32 Mark the provider as read only. 32 Mark the provider as read only.
33 33
34 wp-gpios: 34 wp-gpios:
35 description: 35 description:
36 GPIO to which the write-protect pin of t 36 GPIO to which the write-protect pin of the chip is connected.
37 The write-protect GPIO is asserted, when 37 The write-protect GPIO is asserted, when it's driven high
38 (logical '1') to block the write operati 38 (logical '1') to block the write operation. It's deasserted,
39 when it's driven low (logical '0') to al 39 when it's driven low (logical '0') to allow writing.
40 maxItems: 1 40 maxItems: 1
41 41
42 nvmem-layout: 42 nvmem-layout:
43 $ref: /schemas/nvmem/layouts/nvmem-layout. 43 $ref: /schemas/nvmem/layouts/nvmem-layout.yaml
44 description: 44 description:
45 Alternative to the statically defined nv 45 Alternative to the statically defined nvmem cells, this
46 container may reference more advanced (d 46 container may reference more advanced (dynamic) layout
47 parsers. 47 parsers.
48 48
49 additionalProperties: true 49 additionalProperties: true
50 50
51 examples: 51 examples:
52 - | 52 - |
53 #include <dt-bindings/gpio/gpio.h> 53 #include <dt-bindings/gpio/gpio.h>
54 54
55 qfprom: eeprom@700000 { 55 qfprom: eeprom@700000 {
56 compatible = "qcom,msm8974-qfprom", 56 compatible = "qcom,msm8974-qfprom", "qcom,qfprom";
57 #address-cells = <1>; 57 #address-cells = <1>;
58 #size-cells = <1>; 58 #size-cells = <1>;
59 reg = <0x00700000 0x100000>; 59 reg = <0x00700000 0x100000>;
60 60
61 wp-gpios = <&gpio1 3 GPIO_ACTIVE_HIG 61 wp-gpios = <&gpio1 3 GPIO_ACTIVE_HIGH>;
62 62
63 /* ... */ 63 /* ... */
64 64
65 nvmem-layout { 65 nvmem-layout {
66 compatible = "fixed-layout"; 66 compatible = "fixed-layout";
67 #address-cells = <1>; 67 #address-cells = <1>;
68 #size-cells = <1>; 68 #size-cells = <1>;
69 69
70 /* Data cells */ 70 /* Data cells */
71 tsens_calibration: calib@404 { 71 tsens_calibration: calib@404 {
72 reg = <0x404 0x10>; 72 reg = <0x404 0x10>;
73 }; 73 };
74 74
75 tsens_calibration_bckp: calib_bc 75 tsens_calibration_bckp: calib_bckp@504 {
76 reg = <0x504 0x11>; 76 reg = <0x504 0x11>;
77 bits = <6 128>; 77 bits = <6 128>;
78 }; 78 };
79 79
80 pvs_version: pvs-version@6 { 80 pvs_version: pvs-version@6 {
81 reg = <0x6 0x2>; 81 reg = <0x6 0x2>;
82 bits = <7 2>; 82 bits = <7 2>;
83 }; 83 };
84 84
85 speed_bin: speed-bin@c{ 85 speed_bin: speed-bin@c{
86 reg = <0xc 0x1>; 86 reg = <0xc 0x1>;
87 bits = <2 3>; 87 bits = <2 3>;
88 }; 88 };
89 }; 89 };
90 }; 90 };
91 91
92 ... 92 ...
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