1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/nvmem/st,stm32-romem.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: STMicroelectronics STM32 Factory-programmed data
8
9 description: |
10 This represents STM32 Factory-programmed read only non-volatile area: locked
11 flash, OTP, read-only HW regs... This contains various information such as:
12 analog calibration data for temperature sensor (e.g. TS_CAL1, TS_CAL2),
13 internal vref (VREFIN_CAL), unique device ID...
14
15 maintainers:
16 - Fabrice Gasnier <fabrice.gasnier@foss.st.com>
17
18 allOf:
19 - $ref: nvmem.yaml#
20 - $ref: nvmem-deprecated-cells.yaml#
21
22 properties:
23 compatible:
24 enum:
25 - st,stm32f4-otp
26 - st,stm32mp13-bsec
27 - st,stm32mp15-bsec
28 - st,stm32mp25-bsec
29
30 reg:
31 maxItems: 1
32
33 patternProperties:
34 "^.*@[0-9a-f]+$":
35 type: object
36 $ref: layouts/fixed-cell.yaml
37 unevaluatedProperties: false
38
39 properties:
40 st,non-secure-otp:
41 description: |
42 This property explicits a factory programmed area that both secure
43 and non-secure worlds can access. It is needed when, by default, the
44 related area can only be reached by the secure world.
45 type: boolean
46
47 required:
48 - "#address-cells"
49 - "#size-cells"
50 - compatible
51 - reg
52
53 unevaluatedProperties: false
54
55 examples:
56 - |
57 efuse@1fff7800 {
58 compatible = "st,stm32f4-otp";
59 reg = <0x1fff7800 0x400>;
60 #address-cells = <1>;
61 #size-cells = <1>;
62
63 calib@22c {
64 reg = <0x22c 0x2>;
65 };
66
67 mac_addr@e4 {
68 reg = <0xe4 0x8>;
69 st,non-secure-otp;
70 };
71 };
72
73 ...
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