FlexSPI NOR driver

arch/arm/src/imxrt/Kconfig

@@ -168,6 +168,10 @@ config IMXRT_LPSPI
 	bool
 	default n
 
+config IMXRT_FLEXSPI
+	bool
+	default n
+
 config IMXRT_ADC
     bool
     default n
@@ -644,6 +648,15 @@ menuconfig IMXRT_LPSPI4
 
 endmenu # LPSPI Peripherals
 
+menu "FLEXSPI Peripherals"
+
+menuconfig IMXRT_FLEXSPI1
+	bool "FLEXSPI1"
+	default n
+	select IMXRT_FLEXSPI
+
+endmenu # FLEXSPI Peripherals
+
 menu "ADC Peripherals"
 
 menuconfig IMXRT_ADC1

arch/arm/src/imxrt/Make.defs

@@ -138,6 +138,10 @@ ifeq ($(CONFIG_IMXRT_LPSPI),y)
 CHIP_CSRCS += imxrt_lpspi.c
 endif
 
+ifeq ($(CONFIG_IMXRT_FLEXSPI),y)
+CHIP_CSRCS += imxrt_flexspi.c
+endif
+
 ifeq ($(CONFIG_IMXRT_ENC),y)
 CHIP_CSRCS += imxrt_enc.c
 endif

arch/arm/src/imxrt/hardware/imxrt_iomuxc.h

@@ -175,4 +175,7 @@
 
 #define IOMUX_ADC_DEFAULT                     (0)
 
+#define IOMUX_FLEXSPI_DEFAULT                 (IOMUX_SLEW_FAST | IOMUX_DRIVE_40OHM | IOMUX_SPEED_MAX | \
+                                               IOMUX_PULL_DOWN_100K | IOMUX_PULL_KEEP | GPIO_SION_ENABLE )
+
 #endif /* __ARCH_ARM_SRC_IMXRT_HARDWARE_IMXRT_IOMUXC_H */

arch/arm/src/imxrt/imxrt_flexspi.h

@@ -0,0 +1,93 @@
+/****************************************************************************
+ * arch/arm/src/imxrt/imxrt_flexspi.h
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+#ifndef __ARCH_ARM_SRC_IMXRT_IMXRT_FLEXSPI_H
+#define __ARCH_ARM_SRC_IMXRT_IMXRT_FLEXSPI_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdint.h>
+#include <stdbool.h>
+
+#include "chip.h"
+#include "imxrt_config.h"
+
+#ifdef CONFIG_IMXRT_FLEXSPI
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Inline Functions
+ ****************************************************************************/
+
+#ifndef __ASSEMBLY__
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+#undef EXTERN
+#if defined(__cplusplus)
+#define EXTERN extern "C"
+extern "C"
+{
+#else
+#define EXTERN extern
+#endif
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: imxrt_flexspi_initialize
+ *
+ * Description:
+ *   Initialize the selected FlexSPI port in master mode
+ *
+ * Input Parameters:
+ *   intf - Interface number(must be zero)
+ *
+ * Returned Value:
+ *   Valid FlexSPI device structure reference on success; a NULL on failure
+ *
+ ****************************************************************************/
+
+struct flexspi_dev_s;
+FAR struct flexspi_dev_s *imxrt_flexspi_initialize(int intf);
+
+#undef EXTERN
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* __ASSEMBLY__ */
+#endif /* CONFIG_IMXRT_FLEXSPI */
+#endif /* __ARCH_ARM_SRC_IMXRT_IMXRT_FLEXSPI_H */

drivers/mtd/Kconfig

@@ -655,6 +655,25 @@ config W25QXXXJV_SECTOR512
 
 endif # MTD_W25QXXXJV
 
+config MTD_FLEXSPI_NOR
+	bool "FlexSPI-based NOR FLASH"
+	default n
+	---help---
+		Support the W25Q064JV, WIS25WP064
+
+if MTD_FLEXSPI_NOR
+
+config FLEXSPI_NOR_FREQUENCY
+	int "FlexSPI NOR Frequency"
+	default 133000000
+	---help---
+		Per data sheet:
+		– 133MHz Single, Dual/Quad SPI clocks
+		– 266/532MHz equivalent Dual/Quad SPI
+		– 66MB/S continuous data transfer rate
+
+endif # MTD_FLEXSPI_NOR
+
 config MTD_MX25RXX
 	bool "QuadSPI-based Macronix MX25RXX family FLASH"
 	default n

drivers/mtd/Make.defs

@@ -140,6 +140,10 @@ ifeq ($(CONFIG_MTD_IS25XP),y)
 CSRCS += is25xp.c
 endif
 
+ifeq ($(CONFIG_MTD_FLEXSPI_NOR),y)
+CSRCS += flexspi_nor.c
+endif
+
 ifeq ($(CONFIG_MTD_SMART),y)
 ifeq ($(CONFIG_FS_SMARTFS),y)
 CSRCS += smart.c

include/nuttx/mtd/mtd.h

@@ -90,7 +90,8 @@
  * Public Types
  ****************************************************************************/
 
-struct qspi_dev_s; /* Forward reference */
+struct qspi_dev_s;    /* Forward reference */
+struct flexspi_dev_s; /* Forward reference */
 
 /* The following defines the geometry for the device.  It treats the device
  * as though it were just an array of fixed size blocks.  That is most likely
@@ -594,6 +595,18 @@ FAR struct mtd_dev_s *n25qxxx_initialize(FAR struct qspi_dev_s *qspi,
 FAR struct mtd_dev_s *w25qxxxjv_initialize(FAR struct qspi_dev_s *qspi,
                                          bool unprotect);
 
+/****************************************************************************
+ * Name: flexspi_nor_initialize
+ *
+ * Description:
+ *   Create an initialized MTD device instance for the FlexSPI-based
+ *   FLASH part.
+ *
+ ****************************************************************************/
+
+FAR struct mtd_dev_s *flexspi_nor_initialize(FAR struct flexspi_dev_s
+                                             *flexspi, bool unprotect);
+
 /****************************************************************************
  * Name: blockmtd_initialize
  *