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

   1 STMicroelectronics STM32 Factory-programmed data device tree bindings
   2
   3 This represents STM32 Factory-programmed read only non-volatile area: locked
   4 flash, OTP, read-only HW regs... This contains various information such as:
   5 analog calibration data for temperature sensor (e.g. TS_CAL1, TS_CAL2),
   6 internal vref (VREFIN_CAL), unique device ID...
   7
   8 Required properties:
   9 - compatible:           Should be one of:
  10                         "st,stm32f4-otp"
  11                         "st,stm32mp15-bsec"
  12 - reg:                  Offset and length of factory-programmed area.
  13 - #address-cells:       Should be '<1>'.
  14 - #size-cells:          Should be '<1>'.
  15
  16 Optional Data cells:
  17 - Must be child nodes as described in nvmem.txt.
  18
  19 Example on stm32f4:
  20         romem: nvmem@1fff7800 {
  21                 compatible = "st,stm32f4-otp";
  22                 reg = <0x1fff7800 0x400>;
  23                 #address-cells = <1>;
  24                 #size-cells = <1>;
  25
  26                 /* Data cells: ts_cal1 at 0x1fff7a2c */
  27                 ts_cal1: calib@22c {
  28                         reg = <0x22c 0x2>;
  29                 };
  30                 ...
  31         };