Documentation/devicetree/bindings/nvmem/st,stm32-romem.yaml

   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   - $ref: nvmem.yaml#
  20
  21 properties:
  22   compatible:
  23     enum:
  24       - st,stm32f4-otp
  25       - st,stm32mp13-bsec
  26       - st,stm32mp15-bsec
  27       - st,stm32mp25-bsec
  28
  29   reg:
  30     maxItems: 1
  31
  32 patternProperties:
  33   "^.*@[0-9a-f]+$":
  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
  44 required:
  45   - "#address-cells"
  46   - "#size-cells"
  47   - compatible
  48   - reg
  49
  50 unevaluatedProperties: false
  51
  52 examples:
  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 ...