Merge pull request #8639 from offirko/offir-mbed-qspif3

Add get_erase_value() support

Author: Cruz Monrreal

components/storage/blockdevice/COMPONENT_QSPIF/QSPIFBlockDevice.cpp

@@ -514,6 +514,11 @@ bd_size_t QSPIFBlockDevice::size() const
     return _device_size_bytes;
 }
 
+int QSPIFBlockDevice::get_erase_value() const
+{
+    return 0xFF;
+}
+
 /********************************/
 /*   Different Device Csel Mgmt */
 /********************************/

components/storage/blockdevice/COMPONENT_QSPIF/QSPIFBlockDevice.h

@@ -191,6 +191,17 @@ class QSPIFBlockDevice : public BlockDevice {
      */
     virtual bd_size_t get_erase_size(bd_addr_t addr);
 
+    /** Get the value of storage byte after it was erased
+     *
+     *  If get_erase_value returns a non-negative byte value, the underlying
+     *  storage is set to that value when erased, and storage containing
+     *  that value can be programmed without another erase.
+     *
+     *  @return         The value of storage when erased, or -1 if you can't
+     *                  rely on the value of erased storage
+     */
+    virtual int get_erase_value() const;
+
     /** Get the total size of the underlying device
      *
      *  @return         Size of the underlying device in bytes