STM32 temperature sensor

[Delsian]

Is your enhancement proposal related to a problem? Please describe.
STM32 chips contain an internal temperature sensor, but existing ADC bindings doesn't allow read internal temperature value in a proper way.

Describe the solution you'd like
Sensor binding similar to dts\bindings\sensor\nxp,kinetis-temperature.yaml

Additional context

/* Temperature sensor calibration value address */
#define TEMP130_CAL_ADDR ((uint16_t*) ((uint32_t) 0x1FF8007E))
#define TEMP30_CAL_ADDR ((uint16_t*) ((uint32_t) 0x1FF8007A))
#define VDD_CALIB ((uint16_t) (300))
#define VDD_APPLI ((uint16_t) (330)) // <-- change this to according to your supply voltage

int32_t ComputeTemperature(uint32_t measure)
{
  int32_t temperature;
  temperature = ((measure * VDD_APPLI / VDD_CALIB) - (int32_t)*TEMP30_CAL_ADDR );
  temperature = temperature *(int32_t)(130-30);
  temperature = temperature /(int32_t)(*TEMP130_CAL_ADDR -*TEMP30_CAL_ADDR);
  temperature = temperature + 30;
  return(temperature);
}

Other usable sources, for example, AN3964 "STM32L1x temperature sensor example"

[erwango]

@Delsian Thanks for this. Don't hesiate to contribute of you have solution in mind.

[Delsian]

Implemented.