drivers/mtd: Add gd25 driver

drivers/mtd/Kconfig

@@ -984,3 +984,28 @@ config W25_SLOWREAD
 	default n
 
 endif # MTD_W25
+
+config MTD_GD25
+	bool "SPI-based GD25 FLASH"
+	default n
+	select SPI
+
+if MTD_GD25
+
+config GD25_SPIMODE
+	int "GD25 SPI Mode"
+	default 0
+
+config GD25_SPIFREQUENCY
+	int "GD25 SPI Frequency"
+	default 20000000
+
+config GD25_READONLY
+	bool "GD25 Read-Only FLASH"
+	default n
+
+config GD25_SLOWREAD
+	bool
+	default n
+
+endif # MTD_GD25

drivers/mtd/Make.defs

@@ -108,6 +108,10 @@ ifeq ($(CONFIG_MTD_W25),y)
 CSRCS += w25.c
 endif
 
+ifeq ($(CONFIG_MTD_GD25),y)
+CSRCS += gd25.c
+endif
+
 ifeq ($(CONFIG_MTD_AT25),y)
 CSRCS += at25.c
 endif

include/nuttx/mtd/mtd.h

@@ -524,6 +524,16 @@ FAR struct mtd_dev_s *sst39vf_initialize(void);
 
 FAR struct mtd_dev_s *w25_initialize(FAR struct spi_dev_s *dev);
 
+/****************************************************************************
+ * Name: gd25_initialize
+ *
+ * Description:
+ *   Initializes the driver for SPI-based GD25 FLASH
+ *
+ ****************************************************************************/
+
+FAR struct mtd_dev_s *gd25_initialize(FAR struct spi_dev_s *dev);
+
 /****************************************************************************
  * Name: s25fl1_initialize
  *