fix eeprom issues after cold boot

teensy4/eeprom.c

@@ -237,6 +237,9 @@ static void flash_write(void *addr, const void *data, uint32_t len)
 	FLEXSPI_LUTCR = FLEXSPI_LUTCR_UNLOCK;
 	FLEXSPI_IPCR0 = 0;
 	FLEXSPI_LUT60 = LUT0(CMD_SDR, PINS1, 0x06); // 06 = write enable
+	FLEXSPI_LUT61 = 0;
+	FLEXSPI_LUT62 = 0;
+	FLEXSPI_LUT63 = 0;
 	FLEXSPI_IPCR1 = FLEXSPI_IPCR1_ISEQID(15);
 	FLEXSPI_IPCMD = FLEXSPI_IPCMD_TRG;
 	arm_dcache_delete(addr, len); // purge old data from ARM's cache
@@ -273,6 +276,9 @@ static void flash_erase_sector(void *addr)
 	FLEXSPI_LUTKEY = FLEXSPI_LUTKEY_VALUE;
 	FLEXSPI_LUTCR = FLEXSPI_LUTCR_UNLOCK;
 	FLEXSPI_LUT60 = LUT0(CMD_SDR, PINS1, 0x06); // 06 = write enable
+	FLEXSPI_LUT61 = 0;
+	FLEXSPI_LUT62 = 0;
+	FLEXSPI_LUT63 = 0;
 	FLEXSPI_IPCR0 = 0;
 	FLEXSPI_IPCR1 = FLEXSPI_IPCR1_ISEQID(15);
 	FLEXSPI_IPCMD = FLEXSPI_IPCMD_TRG;
@@ -280,7 +286,6 @@ static void flash_erase_sector(void *addr)
 	while (!(FLEXSPI_INTR & FLEXSPI_INTR_IPCMDDONE)) ; // wait
 	FLEXSPI_INTR = FLEXSPI_INTR_IPCMDDONE;
 	FLEXSPI_LUT60 = LUT0(CMD_SDR, PINS1, 0x20) | LUT1(ADDR_SDR, PINS1, 24); // 20 = sector erase
-	FLEXSPI_LUT61 = 0;
 	FLEXSPI_IPCR0 = (uint32_t)addr & 0x001FF000;
 	FLEXSPI_IPCR1 = FLEXSPI_IPCR1_ISEQID(15);
 	FLEXSPI_IPCMD = FLEXSPI_IPCMD_TRG;