xref: /freebsd/sys/contrib/device-tree/Bindings/nvmem/st,stm32-romem.yaml (revision 81ad626541db97eb356e2c1d4a20eb2a26a766ab) 
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
7title: STMicroelectronics STM32 Factory-programmed data bindings
8
9description: |
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
15maintainers:
16  - Fabrice Gasnier <fabrice.gasnier@foss.st.com>
17
18allOf:
19  - $ref: "nvmem.yaml#"
20
21properties:
22  compatible:
23    enum:
24      - st,stm32f4-otp
25      - st,stm32mp15-bsec
26
27  reg:
28    maxItems: 1
29
30patternProperties:
31  "^.*@[0-9a-f]+$":
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
42required:
43  - "#address-cells"
44  - "#size-cells"
45  - compatible
46  - reg
47
48unevaluatedProperties: false
49
50examples:
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...
69