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 bindings
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 - $ref: "nvmem.yaml#"
20
21 properties:
22 compatible:
23 enum:
24 - st,stm32f4-otp
25 - st,stm32mp15-bsec
26
27 reg:
28 maxItems: 1
29
30 patternProperties:
31 "^.*@[0-9a-f]+$":
32 type: object
33
34 properties:
35 st,non-secure-otp:
36 description: |
37 This property explicits a factory programmed area that both secure
38 and non-secure worlds can access. It is needed when, by default, the
39 related area can only be reached by the secure world.
40 type: boolean
41
42 required:
43 - "#address-cells"
44 - "#size-cells"
45 - compatible
46 - reg
47
48 unevaluatedProperties: false
49
50 examples:
51 - |
52 efuse@1fff7800 {
53 compatible = "st,stm32f4-otp";
54 reg = <0x1fff7800 0x400>;
55 #address-cells = <1>;
56 #size-cells = <1>;
57
58 calib@22c {
59 reg = <0x22c 0x2>;
60 };
61
62 mac_addr@e4 {
63 reg = <0xe4 0x8>;
64 st,non-secure-otp;
65 };
66 };
67
68 ...
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