xref: /freebsd/sys/contrib/device-tree/Bindings/nvmem/st,stm32-romem.yaml (revision a90b9d0159070121c221b966469c3e36d912bf82) 
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
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  - $ref: nvmem.yaml#
20
21properties:
22  compatible:
23    enum:
24      - st,stm32f4-otp
25      - st,stm32mp13-bsec
26      - st,stm32mp15-bsec
27      - st,stm32mp25-bsec
28
29  reg:
30    maxItems: 1
31
32patternProperties:
33  "^.*@[0-9a-f]+$":
34    type: object
35
36    properties:
37      st,non-secure-otp:
38        description: |
39          This property explicits a factory programmed area that both secure
40          and non-secure worlds can access. It is needed when, by default, the
41          related area can only be reached by the secure world.
42        type: boolean
43
44required:
45  - "#address-cells"
46  - "#size-cells"
47  - compatible
48  - reg
49
50unevaluatedProperties: false
51
52examples:
53  - |
54    efuse@1fff7800 {
55      compatible = "st,stm32f4-otp";
56      reg = <0x1fff7800 0x400>;
57      #address-cells = <1>;
58      #size-cells = <1>;
59
60      calib@22c {
61        reg = <0x22c 0x2>;
62      };
63
64      mac_addr@e4 {
65        reg = <0xe4 0x8>;
66        st,non-secure-otp;
67      };
68    };
69
70...
71