Need to include PSRAM support in mbed-os

Mbed OS Feature requests
,
1

Hi,
I am trying to include PSRAM support for mbed os.I know for this i need to activate FCM module in targets.json .
But in targets.json the device_has_add no support for FMC.
Below is my target.json device part

{

  • “EM_GATEWAY_L471ZG”:*
  • {*
  •    "inherits": ["MCU_STM32L471xG"],*

  •    "device_name": "STM32L471ZGTx",*

  •    "bootloader_supported": true,*

  •    "extra_labels_add": ["STM32L471xG"],*

  •    "macros_add": ["TWO_RAM_REGIONS"],*

  •   "mbed_rom_start": "0x08000000",*

  •    "mbed_rom_size": "0x100000",*

  •    "mbed_ram_start": "0x20000000",*

  •    "mbed_ram_size": "0x18000",*

  •    "device_has_add": [*

  •        "ANALOGOUT",*

  •        "CAN",*

  •        "SERIAL_ASYNCH",*

  •        "TRNG",*

  •        "FLASH",*

  •        "MPU"*

  •    ]*
  • }*
    }
    What i am looking for is:
  1. The Method to add a new module to the device_has_add
  2. Any help on adding a PSRAM support in mbed-os
  3. In mbed documentation it is mentioned as device_has, but in examples it is device_has_add , if both keyword has same functionalities or different.

Thanks for your help, in advance.