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+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/nvmem/st,stm32-romem.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: STMicroelectronics STM32 Factory-programmed data bindings
+
+description: |
+ This represents STM32 Factory-programmed read only non-volatile area: locked
+ flash, OTP, read-only HW regs... This contains various information such as:
+ analog calibration data for temperature sensor (e.g. TS_CAL1, TS_CAL2),
+ internal vref (VREFIN_CAL), unique device ID...
+
+maintainers:
+ - Fabrice Gasnier <fabrice.gasnier@foss.st.com>
+
+allOf:
+ - $ref: "nvmem.yaml#"
+
+properties:
+ compatible:
+ enum:
+ - st,stm32f4-otp
+ - st,stm32mp15-bsec
+
+ reg:
+ maxItems: 1
+
+patternProperties:
+ "^.*@[0-9a-f]+$":
+ type: object
+
+ properties:
+ st,non-secure-otp:
+ description: |
+ This property explicits a factory programmed area that both secure
+ and non-secure worlds can access. It is needed when, by default, the
+ related area can only be reached by the secure world.
+ type: boolean
+
+required:
+ - "#address-cells"
+ - "#size-cells"
+ - compatible
+ - reg
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ efuse@1fff7800 {
+ compatible = "st,stm32f4-otp";
+ reg = <0x1fff7800 0x400>;
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ calib@22c {
+ reg = <0x22c 0x2>;
+ };
+
+ mac_addr@e4 {
+ reg = <0xe4 0x8>;
+ st,non-secure-otp;
+ };
+ };
+
+...