spi_flash: re-enable the HPM mode on several XMC chips

components/bootloader_support/bootloader_flash/include/bootloader_flash_priv.h

@@ -42,6 +42,7 @@ extern "C" {
 #define CMD_WRSR2      0x31 /* Not all SPI flash uses this command */
 #define CMD_WRSR3      0x11 /* Not all SPI flash uses this command */
 #define CMD_WREN       0x06
+#define CMD_WRENVSR    0x50 /* Flash write enable for volatile SR bits */
 #define CMD_WRDI       0x04
 #define CMD_RDSR       0x05
 #define CMD_RDSR2      0x35 /* Not all SPI flash uses this command */
@@ -50,6 +51,8 @@ extern "C" {
 #define CMD_RDSFDP     0x5A /* Read the SFDP of the flash */
 #define CMD_WRAP       0x77 /* Set burst with wrap command */
 #define CMD_RESUME     0x7A /* Resume command to clear flash suspend bit */
+#define CMD_RESETEN    0x66
+#define CMD_RESET      0x99
 
 
 /* Provide a Flash API for bootloader_support code,
@@ -172,6 +175,14 @@ uint32_t bootloader_flash_read_sfdp(uint32_t sfdp_addr, unsigned int miso_byte_n
  */
 void bootloader_enable_wp(void);
 
+/**
+ * @brief Once this function is called,
+ * any on-going internal operations will be terminated and the device will return to its default power-on
+ * state and lose all the current volatile settings, such as Volatile Status Register bits, Write Enable Latch
+ * (WEL) status, Program/Erase Suspend status, etc.
+ */
+void bootloader_spi_flash_reset(void);
+
 #ifdef __cplusplus
 }
 #endif