openwrt/target/linux/layerscape/patches-4.9/401-mtd-spi-nor-support-layerscape.patch

From c03c545e064a81515fe109ddcc4ecb3895528e58 Mon Sep 17 00:00:00 2001
From: Yangbo Lu <[email protected]>
Date: Fri, 6 Jul 2018 15:32:05 +0800
Subject: [PATCH] mtd: spi-nor: support layerscape

This is an integrated patch for layerscape qspi support.

Signed-off-by: Suresh Gupta <[email protected]>
Signed-off-by: Yunhui Cui <[email protected]>
Signed-off-by: mar.krzeminski <[email protected]>
Signed-off-by: Alison Wang <[email protected]>
Signed-off-by: Nobuhiro Iwamatsu <[email protected]>
Signed-off-by: LABBE Corentin <[email protected]>
Signed-off-by: Yuan Yao <[email protected]>
Signed-off-by: Alexander Kurz <[email protected]>
Signed-off-by: L. D. Pinney <[email protected]>
Signed-off-by: Ash Benz <[email protected]>
Signed-off-by: Yangbo Lu <[email protected]>
---
 drivers/mtd/devices/m25p80.c      |   3 +-
 drivers/mtd/mtdchar.c             |   2 +-
 drivers/mtd/spi-nor/fsl-quadspi.c | 327 ++++++++++++++++++++++++------
 drivers/mtd/spi-nor/spi-nor.c     | 141 ++++++++++++-
 include/linux/mtd/spi-nor.h       |  14 +-
 5 files changed, 416 insertions(+), 71 deletions(-)

--- a/drivers/mtd/mtdchar.c
+++ b/drivers/mtd/mtdchar.c
@@ -455,7 +455,7 @@ static int mtdchar_readoob(struct file *
 	 * data. For our userspace tools it is important to dump areas
 	 * with ECC errors!
 	 * For kernel internal usage it also might return -EUCLEAN
-	 * to signal the caller that a bitflip has occured and has
+	 * to signal the caller that a bitflip has occurred and has
 	 * been corrected by the ECC algorithm.
 	 *
 	 * Note: currently the standard NAND function, nand_read_oob_std,
--- a/drivers/mtd/spi-nor/fsl-quadspi.c
+++ b/drivers/mtd/spi-nor/fsl-quadspi.c
@@ -41,6 +41,8 @@
 #define QUADSPI_QUIRK_TKT253890		(1 << 2)
 /* Controller cannot wake up from wait mode, TKT245618 */
 #define QUADSPI_QUIRK_TKT245618         (1 << 3)
+/* QSPI_AMBA_BASE is internally added by SOC design */
+#define QUADSPI_AMBA_BASE_INTERNAL	(0x10000)
 
 /* The registers */
 #define QUADSPI_MCR			0x00
@@ -193,7 +195,7 @@
 #define QUADSPI_LUT_NUM		64
 
 /* SEQID -- we can have 16 seqids at most. */
-#define SEQID_QUAD_READ		0
+#define SEQID_READ		0
 #define SEQID_WREN		1
 #define SEQID_WRDI		2
 #define SEQID_RDSR		3
@@ -205,15 +207,22 @@
 #define SEQID_RDCR		9
 #define SEQID_EN4B		10
 #define SEQID_BRWR		11
+#define SEQID_RDAR_OR_RD_EVCR	12
+#define SEQID_WRAR		13
+#define SEQID_WD_EVCR           14
 
 #define QUADSPI_MIN_IOMAP SZ_4M
 
+#define FLASH_VENDOR_SPANSION_FS	"s25fs"
+#define SPANSION_S25FS_FAMILY	(1 << 1)
+
 enum fsl_qspi_devtype {
 	FSL_QUADSPI_VYBRID,
 	FSL_QUADSPI_IMX6SX,
 	FSL_QUADSPI_IMX7D,
 	FSL_QUADSPI_IMX6UL,
 	FSL_QUADSPI_LS1021A,
+	FSL_QUADSPI_LS2080A,
 };
 
 struct fsl_qspi_devtype_data {
@@ -224,7 +233,7 @@ struct fsl_qspi_devtype_data {
 	int driver_data;
 };
 
-static struct fsl_qspi_devtype_data vybrid_data = {
+static const struct fsl_qspi_devtype_data vybrid_data = {
 	.devtype = FSL_QUADSPI_VYBRID,
 	.rxfifo = 128,
 	.txfifo = 64,
@@ -232,7 +241,7 @@ static struct fsl_qspi_devtype_data vybr
 	.driver_data = QUADSPI_QUIRK_SWAP_ENDIAN,
 };
 
-static struct fsl_qspi_devtype_data imx6sx_data = {
+static const struct fsl_qspi_devtype_data imx6sx_data = {
 	.devtype = FSL_QUADSPI_IMX6SX,
 	.rxfifo = 128,
 	.txfifo = 512,
@@ -241,7 +250,7 @@ static struct fsl_qspi_devtype_data imx6
 		       | QUADSPI_QUIRK_TKT245618,
 };
 
-static struct fsl_qspi_devtype_data imx7d_data = {
+static const struct fsl_qspi_devtype_data imx7d_data = {
 	.devtype = FSL_QUADSPI_IMX7D,
 	.rxfifo = 512,
 	.txfifo = 512,
@@ -250,7 +259,7 @@ static struct fsl_qspi_devtype_data imx7
 		       | QUADSPI_QUIRK_4X_INT_CLK,
 };
 
-static struct fsl_qspi_devtype_data imx6ul_data = {
+static const struct fsl_qspi_devtype_data imx6ul_data = {
 	.devtype = FSL_QUADSPI_IMX6UL,
 	.rxfifo = 128,
 	.txfifo = 512,
@@ -267,6 +276,14 @@ static struct fsl_qspi_devtype_data ls10
 	.driver_data = 0,
 };
 
+static struct fsl_qspi_devtype_data ls2080a_data = {
+	.devtype = FSL_QUADSPI_LS2080A,
+	.rxfifo = 128,
+	.txfifo = 64,
+	.ahb_buf_size = 1024,
+	.driver_data = QUADSPI_AMBA_BASE_INTERNAL | QUADSPI_QUIRK_TKT253890,
+};
+
 #define FSL_QSPI_MAX_CHIP	4
 struct fsl_qspi {
 	struct spi_nor nor[FSL_QSPI_MAX_CHIP];
@@ -282,6 +299,7 @@ struct fsl_qspi {
 	u32 nor_size;
 	u32 nor_num;
 	u32 clk_rate;
+	u32 ddr_smp;
 	unsigned int chip_base_addr; /* We may support two chips. */
 	bool has_second_chip;
 	bool big_endian;
@@ -309,6 +327,23 @@ static inline int needs_wakeup_wait_mode
 	return q->devtype_data->driver_data & QUADSPI_QUIRK_TKT245618;
 }
 
+static inline int has_added_amba_base_internal(struct fsl_qspi *q)
+{
+	return q->devtype_data->driver_data & QUADSPI_AMBA_BASE_INTERNAL;
+}
+
+static u32 fsl_get_nor_vendor(struct spi_nor *nor)
+{
+	u32 vendor_id;
+
+	if (nor->vendor) {
+		if (memcmp(nor->vendor, FLASH_VENDOR_SPANSION_FS,
+					sizeof(FLASH_VENDOR_SPANSION_FS) - 1))
+			vendor_id = SPANSION_S25FS_FAMILY;
+	}
+	return vendor_id;
+}
+
 /*
  * R/W functions for big- or little-endian registers:
  * The qSPI controller's endian is independent of the CPU core's endian.
@@ -331,6 +366,31 @@ static u32 qspi_readl(struct fsl_qspi *q
 		return ioread32(addr);
 }
 
+static inline u32 *u8tou32(u32 *dest, const u8 *src, size_t n)
+{
+	size_t i;
+	*dest = 0;
+
+	n = n > 4 ? 4 : n;
+	for (i = 0; i < n; i++)
+		*dest |= *src++ << i * 8;
+
+	return dest;
+
+}
+
+static inline u8 *u32tou8(u8 *dest, const u32 *src, size_t n)
+{
+	size_t i;
+	u8 *xdest = dest;
+
+	n = n > 4 ? 4 : n;
+	for (i = 0; i < n; i++)
+		*xdest++ = *src >> i * 8;
+
+	return dest;
+}
+
 /*
  * An IC bug makes us to re-arrange the 32-bit data.
  * The following chips, such as IMX6SLX, have fixed this bug.
@@ -373,8 +433,15 @@ static void fsl_qspi_init_lut(struct fsl
 	void __iomem *base = q->iobase;
 	int rxfifo = q->devtype_data->rxfifo;
 	u32 lut_base;
-	u8 cmd, addrlen, dummy;
 	int i;
+	u32 vendor;
+
+	struct spi_nor *nor = &q->nor[0];
+	u8 addrlen = (nor->addr_width == 3) ? ADDR24BIT : ADDR32BIT;
+	u8 read_op = nor->read_opcode;
+	u8 read_dm = nor->read_dummy;
+
+	vendor = fsl_get_nor_vendor(nor);
 
 	fsl_qspi_unlock_lut(q);
 
@@ -382,24 +449,50 @@ static void fsl_qspi_init_lut(struct fsl
 	for (i = 0; i < QUADSPI_LUT_NUM; i++)
 		qspi_writel(q, 0, base + QUADSPI_LUT_BASE + i * 4);
 
-	/* Quad Read */
-	lut_base = SEQID_QUAD_READ * 4;
+	/* Read */
+	lut_base = SEQID_READ * 4;
 
-	if (q->nor_size <= SZ_16M) {
-		cmd = SPINOR_OP_READ_1_1_4;
-		addrlen = ADDR24BIT;
-		dummy = 8;
-	} else {
-		/* use the 4-byte address */
-		cmd = SPINOR_OP_READ_1_1_4;
-		addrlen = ADDR32BIT;
-		dummy = 8;
-	}
-
-	qspi_writel(q, LUT0(CMD, PAD1, cmd) | LUT1(ADDR, PAD1, addrlen),
+	if (nor->flash_read == SPI_NOR_FAST) {
+		qspi_writel(q, LUT0(CMD, PAD1, read_op) |
+			    LUT1(ADDR, PAD1, addrlen),
+				base + QUADSPI_LUT(lut_base));
+		qspi_writel(q,  LUT0(DUMMY, PAD1, read_dm) |
+			    LUT1(FSL_READ, PAD1, rxfifo),
+				base + QUADSPI_LUT(lut_base + 1));
+	} else if (nor->flash_read == SPI_NOR_QUAD) {
+		if (q->nor_size == 0x4000000) {
+			read_op = 0xEC;
+		qspi_writel(q,
+			LUT0(CMD, PAD1, read_op) | LUT1(ADDR, PAD4, addrlen),
 			base + QUADSPI_LUT(lut_base));
-	qspi_writel(q, LUT0(DUMMY, PAD1, dummy) | LUT1(FSL_READ, PAD4, rxfifo),
+		qspi_writel(q,
+			LUT0(MODE, PAD4, 0xff) | LUT1(DUMMY, PAD4, read_dm),
 			base + QUADSPI_LUT(lut_base + 1));
+		qspi_writel(q,
+			LUT0(FSL_READ, PAD4, rxfifo),
+			base + QUADSPI_LUT(lut_base + 2));
+		} else {
+			qspi_writel(q, LUT0(CMD, PAD1, read_op) |
+				    LUT1(ADDR, PAD1, addrlen),
+				    base + QUADSPI_LUT(lut_base));
+			qspi_writel(q, LUT0(DUMMY, PAD1, read_dm) |
+				    LUT1(FSL_READ, PAD4, rxfifo),
+				    base + QUADSPI_LUT(lut_base + 1));
+		}
+	} else if (nor->flash_read == SPI_NOR_DDR_QUAD) {
+		/* read mode : 1-4-4, such as Spansion s25fl128s. */
+		qspi_writel(q, LUT0(CMD, PAD1, read_op)
+			| LUT1(ADDR_DDR, PAD4, addrlen),
+			base + QUADSPI_LUT(lut_base));
+
+		qspi_writel(q, LUT0(MODE_DDR, PAD4, 0xff)
+			| LUT1(DUMMY, PAD1, read_dm),
+			base + QUADSPI_LUT(lut_base + 1));
+
+		qspi_writel(q, LUT0(FSL_READ_DDR, PAD4, rxfifo)
+			| LUT1(JMP_ON_CS, PAD1, 0),
+			base + QUADSPI_LUT(lut_base + 2));
+	}
 
 	/* Write enable */
 	lut_base = SEQID_WREN * 4;
@@ -409,16 +502,8 @@ static void fsl_qspi_init_lut(struct fsl
 	/* Page Program */
 	lut_base = SEQID_PP * 4;
 
-	if (q->nor_size <= SZ_16M) {
-		cmd = SPINOR_OP_PP;
-		addrlen = ADDR24BIT;
-	} else {
-		/* use the 4-byte address */
-		cmd = SPINOR_OP_PP;
-		addrlen = ADDR32BIT;
-	}
-
-	qspi_writel(q, LUT0(CMD, PAD1, cmd) | LUT1(ADDR, PAD1, addrlen),
+	qspi_writel(q, LUT0(CMD, PAD1, nor->program_opcode) |
+		    LUT1(ADDR, PAD1, addrlen),
 			base + QUADSPI_LUT(lut_base));
 	qspi_writel(q, LUT0(FSL_WRITE, PAD1, 0),
 			base + QUADSPI_LUT(lut_base + 1));
@@ -432,10 +517,8 @@ static void fsl_qspi_init_lut(struct fsl
 	/* Erase a sector */
 	lut_base = SEQID_SE * 4;
 
-	cmd = q->nor[0].erase_opcode;
-	addrlen = q->nor_size <= SZ_16M ? ADDR24BIT : ADDR32BIT;
-
-	qspi_writel(q, LUT0(CMD, PAD1, cmd) | LUT1(ADDR, PAD1, addrlen),
+	qspi_writel(q, LUT0(CMD, PAD1, nor->erase_opcode) |
+		    LUT1(ADDR, PAD1, addrlen),
 			base + QUADSPI_LUT(lut_base));
 
 	/* Erase the whole chip */
@@ -476,6 +559,44 @@ static void fsl_qspi_init_lut(struct fsl
 	qspi_writel(q, LUT0(CMD, PAD1, SPINOR_OP_BRWR),
 			base + QUADSPI_LUT(lut_base));
 
+
+	/*
+	 * Flash Micron and Spansion command confilict
+	 * use the same value 0x65. But it indicates different meaning.
+	 */
+	lut_base = SEQID_RDAR_OR_RD_EVCR * 4;
+
+	if (vendor == SPANSION_S25FS_FAMILY) {
+		/*
+		* Read any device register.
+		* Used for Spansion S25FS-S family flash only.
+		*/
+		qspi_writel(q, LUT0(CMD, PAD1, SPINOR_OP_SPANSION_RDAR) |
+			    LUT1(ADDR, PAD1, ADDR24BIT),
+			    base + QUADSPI_LUT(lut_base));
+		qspi_writel(q, LUT0(DUMMY, PAD1, 8) | LUT1(FSL_READ, PAD1, 1),
+			    base + QUADSPI_LUT(lut_base + 1));
+	} else {
+		qspi_writel(q, LUT0(CMD, PAD1, SPINOR_OP_RD_EVCR),
+			    base + QUADSPI_LUT(lut_base));
+	}
+
+	/*
+	 * Write any device register.
+	 * Used for Spansion S25FS-S family flash only.
+	 */
+	lut_base = SEQID_WRAR * 4;
+	qspi_writel(q, LUT0(CMD, PAD1, SPINOR_OP_SPANSION_WRAR) |
+			LUT1(ADDR, PAD1, ADDR24BIT),
+			base + QUADSPI_LUT(lut_base));
+	qspi_writel(q, LUT0(FSL_WRITE, PAD1, 1),
+			base + QUADSPI_LUT(lut_base + 1));
+
+	/* Write EVCR register */
+	lut_base = SEQID_WD_EVCR * 4;
+	qspi_writel(q, LUT0(CMD, PAD1, SPINOR_OP_WD_EVCR),
+		    base + QUADSPI_LUT(lut_base));
+
 	fsl_qspi_lock_lut(q);
 }
 
@@ -483,8 +604,24 @@ static void fsl_qspi_init_lut(struct fsl
 static int fsl_qspi_get_seqid(struct fsl_qspi *q, u8 cmd)
 {
 	switch (cmd) {
+	case SPINOR_OP_READ_1_4_4_D:
+	case SPINOR_OP_READ4_1_4_4_D:
+	case SPINOR_OP_READ4_1_1_4:
 	case SPINOR_OP_READ_1_1_4:
-		return SEQID_QUAD_READ;
+	case SPINOR_OP_READ_FAST:
+	case SPINOR_OP_READ4_FAST:
+		return SEQID_READ;
+	/*
+	 * Spansion & Micron use the same command value 0x65
+	 * Spansion: SPINOR_OP_SPANSION_RDAR, read any register.
+	 * Micron: SPINOR_OP_RD_EVCR,
+	 * read enhanced volatile configuration register.
+	 * case SPINOR_OP_RD_EVCR:
+	 */
+	case SPINOR_OP_SPANSION_RDAR:
+		return SEQID_RDAR_OR_RD_EVCR;
+	case SPINOR_OP_SPANSION_WRAR:
+		return SEQID_WRAR;
 	case SPINOR_OP_WREN:
 		return SEQID_WREN;
 	case SPINOR_OP_WRDI:
@@ -496,6 +633,7 @@ static int fsl_qspi_get_seqid(struct fsl
 	case SPINOR_OP_CHIP_ERASE:
 		return SEQID_CHIP_ERASE;
 	case SPINOR_OP_PP:
+	case SPINOR_OP_PP_4B:
 		return SEQID_PP;
 	case SPINOR_OP_RDID:
 		return SEQID_RDID;
@@ -507,6 +645,8 @@ static int fsl_qspi_get_seqid(struct fsl
 		return SEQID_EN4B;
 	case SPINOR_OP_BRWR:
 		return SEQID_BRWR;
+	case SPINOR_OP_WD_EVCR:
+		return SEQID_WD_EVCR;
 	default:
 		if (cmd == q->nor[0].erase_opcode)
 			return SEQID_SE;
@@ -531,8 +671,11 @@ fsl_qspi_runcmd(struct fsl_qspi *q, u8 c
 	/* save the reg */
 	reg = qspi_readl(q, base + QUADSPI_MCR);
 
-	qspi_writel(q, q->memmap_phy + q->chip_base_addr + addr,
-			base + QUADSPI_SFAR);
+	if (has_added_amba_base_internal(q))
+		qspi_writel(q, q->chip_base_addr + addr, base + QUADSPI_SFAR);
+	else
+		qspi_writel(q, q->memmap_phy + q->chip_base_addr + addr,
+			    base + QUADSPI_SFAR);
 	qspi_writel(q, QUADSPI_RBCT_WMRK_MASK | QUADSPI_RBCT_RXBRD_USEIPS,
 			base + QUADSPI_RBCT);
 	qspi_writel(q, reg | QUADSPI_MCR_CLR_RXF_MASK, base + QUADSPI_MCR);
@@ -582,10 +725,10 @@ static void fsl_qspi_read_data(struct fs
 				q->chip_base_addr, tmp);
 
 		if (len >= 4) {
-			*((u32 *)rxbuf) = tmp;
+			u32tou8(rxbuf, &tmp, 4);
 			rxbuf += 4;
 		} else {
-			memcpy(rxbuf, &tmp, len);
+			u32tou8(rxbuf, &tmp, len);
 			break;
 		}
 
@@ -619,11 +762,12 @@ static inline void fsl_qspi_invalid(stru
 }
 
 static ssize_t fsl_qspi_nor_write(struct fsl_qspi *q, struct spi_nor *nor,
-				u8 opcode, unsigned int to, u32 *txbuf,
+				u8 opcode, unsigned int to, u8 *txbuf,
 				unsigned count)
 {
 	int ret, i, j;
 	u32 tmp;
+	u8 byts;
 
 	dev_dbg(q->dev, "to 0x%.8x:0x%.8x, len : %d\n",
 		q->chip_base_addr, to, count);
@@ -633,10 +777,13 @@ static ssize_t fsl_qspi_nor_write(struct
 	qspi_writel(q, tmp | QUADSPI_MCR_CLR_TXF_MASK, q->iobase + QUADSPI_MCR);
 
 	/* fill the TX data to the FIFO */
+	byts = count;
 	for (j = 0, i = ((count + 3) / 4); j < i; j++) {
-		tmp = fsl_qspi_endian_xchg(q, *txbuf);
+		u8tou32(&tmp, txbuf, byts);
+		tmp = fsl_qspi_endian_xchg(q, tmp);
 		qspi_writel(q, tmp, q->iobase + QUADSPI_TBDR);
-		txbuf++;
+		txbuf += 4;
+		byts -= 4;
 	}
 
 	/* fill the TXFIFO upto 16 bytes for i.MX7d */
@@ -657,11 +804,43 @@ static void fsl_qspi_set_map_addr(struct
 {
 	int nor_size = q->nor_size;
 	void __iomem *base = q->iobase;
+	u32 mem_base;
+
+	if (has_added_amba_base_internal(q))
+		mem_base = 0x0;
+	else
+		mem_base = q->memmap_phy;
+
+	qspi_writel(q, nor_size + mem_base, base + QUADSPI_SFA1AD);
+	qspi_writel(q, nor_size * 2 + mem_base, base + QUADSPI_SFA2AD);
+	qspi_writel(q, nor_size * 3 + mem_base, base + QUADSPI_SFB1AD);
+	qspi_writel(q, nor_size * 4 + mem_base, base + QUADSPI_SFB2AD);
+}
+
+/*
+ * enable controller ddr quad mode to support different
+ * vender flashes ddr quad mode.
+ */
+static void set_ddr_quad_mode(struct fsl_qspi *q)
+{
+	u32 reg, reg2;
+
+	reg = qspi_readl(q, q->iobase + QUADSPI_MCR);
+
+	/* Firstly, disable the module */
+	qspi_writel(q, reg | QUADSPI_MCR_MDIS_MASK, q->iobase + QUADSPI_MCR);
+
+	/* Set the Sampling Register for DDR */
+	reg2 = qspi_readl(q, q->iobase + QUADSPI_SMPR);
+	reg2 &= ~QUADSPI_SMPR_DDRSMP_MASK;
+	reg2 |= (((q->ddr_smp) << QUADSPI_SMPR_DDRSMP_SHIFT) &
+			QUADSPI_SMPR_DDRSMP_MASK);
+	qspi_writel(q, reg2, q->iobase + QUADSPI_SMPR);
+
+	/* Enable the module again (enable the DDR too) */
+	reg |= QUADSPI_MCR_DDR_EN_MASK;
+	qspi_writel(q, reg, q->iobase + QUADSPI_MCR);
 
-	qspi_writel(q, nor_size + q->memmap_phy, base + QUADSPI_SFA1AD);
-	qspi_writel(q, nor_size * 2 + q->memmap_phy, base + QUADSPI_SFA2AD);
-	qspi_writel(q, nor_size * 3 + q->memmap_phy, base + QUADSPI_SFB1AD);
-	qspi_writel(q, nor_size * 4 + q->memmap_phy, base + QUADSPI_SFB2AD);
 }
 
 /*
@@ -704,6 +883,11 @@ static void fsl_qspi_init_abh_read(struc
 	seqid = fsl_qspi_get_seqid(q, q->nor[0].read_opcode);
 	qspi_writel(q, seqid << QUADSPI_BFGENCR_SEQID_SHIFT,
 		q->iobase + QUADSPI_BFGENCR);
+
+	/* enable the DDR quad read */
+	if (q->nor->flash_read == SPI_NOR_DDR_QUAD)
+		set_ddr_quad_mode(q);
+
 }
 
 /* This function was used to prepare and enable QSPI clock */
@@ -822,6 +1006,7 @@ static const struct of_device_id fsl_qsp
 	{ .compatible = "fsl,imx7d-qspi", .data = (void *)&imx7d_data, },
 	{ .compatible = "fsl,imx6ul-qspi", .data = (void *)&imx6ul_data, },
 	{ .compatible = "fsl,ls1021a-qspi", .data = (void *)&ls1021a_data, },
+	{ .compatible = "fsl,ls2080a-qspi", .data = (void *)&ls2080a_data, },
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, fsl_qspi_dt_ids);
@@ -835,8 +1020,12 @@ static int fsl_qspi_read_reg(struct spi_
 {
 	int ret;
 	struct fsl_qspi *q = nor->priv;
+	u32 to = 0;
 
-	ret = fsl_qspi_runcmd(q, opcode, 0, len);
+	if (opcode == SPINOR_OP_SPANSION_RDAR)
+		u8tou32(&to, nor->cmd_buf, 4);
+
+	ret = fsl_qspi_runcmd(q, opcode, to, len);
 	if (ret)
 		return ret;
 
@@ -848,9 +1037,13 @@ static int fsl_qspi_write_reg(struct spi
 {
 	struct fsl_qspi *q = nor->priv;
 	int ret;
+	u32 to = 0;
+
+	if (opcode == SPINOR_OP_SPANSION_WRAR)
+		u8tou32(&to, nor->cmd_buf, 4);
 
 	if (!buf) {
-		ret = fsl_qspi_runcmd(q, opcode, 0, 1);
+		ret = fsl_qspi_runcmd(q, opcode, to, 1);
 		if (ret)
 			return ret;
 
@@ -859,7 +1052,7 @@ static int fsl_qspi_write_reg(struct spi
 
 	} else if (len > 0) {
 		ret = fsl_qspi_nor_write(q, nor, opcode, 0,
-					(u32 *)buf, len);
+					buf, len);
 		if (ret > 0)
 			return 0;
 	} else {
@@ -875,7 +1068,7 @@ static ssize_t fsl_qspi_write(struct spi
 {
 	struct fsl_qspi *q = nor->priv;
 	ssize_t ret = fsl_qspi_nor_write(q, nor, nor->program_opcode, to,
-					 (u32 *)buf, len);
+					 (u8 *)buf, len);
 
 	/* invalid the data in the AHB buffer. */
 	fsl_qspi_invalid(q);
@@ -922,7 +1115,7 @@ static ssize_t fsl_qspi_read(struct spi_
 		len);
 
 	/* Read out the data directly from the AHB buffer.*/
-	memcpy(buf, q->ahb_addr + q->chip_base_addr + from - q->memmap_offs,
+	memcpy_toio(buf, q->ahb_addr + q->chip_base_addr + from - q->memmap_offs,
 		len);
 
 	return len;
@@ -980,6 +1173,8 @@ static int fsl_qspi_probe(struct platfor
 	struct spi_nor *nor;
 	struct mtd_info *mtd;
 	int ret, i = 0;
+	int find_node;
+	enum read_mode mode = SPI_NOR_QUAD;
 
 	q = devm_kzalloc(dev, sizeof(*q), GFP_KERNEL);
 	if (!q)
@@ -1027,6 +1222,12 @@ static int fsl_qspi_probe(struct platfor
 		goto clk_failed;
 	}
 
+	/* find ddrsmp value */
+	ret = of_property_read_u32(dev->of_node, "fsl,ddr-sampling-point",
+				&q->ddr_smp);
+	if (ret)
+		q->ddr_smp = 0;
+
 	/* find the irq */
 	ret = platform_get_irq(pdev, 0);
 	if (ret < 0) {
@@ -1050,6 +1251,7 @@ static int fsl_qspi_probe(struct platfor
 
 	mutex_init(&q->lock);
 
+	find_node = 0;
 	/* iterate the subnodes. */
 	for_each_available_child_of_node(dev->of_node, np) {
 		/* skip the holes */
@@ -1076,18 +1278,25 @@ static int fsl_qspi_probe(struct platfor
 		ret = of_property_read_u32(np, "spi-max-frequency",
 				&q->clk_rate);
 		if (ret < 0)
-			goto mutex_failed;
+			continue;
 
 		/* set the chip address for READID */
 		fsl_qspi_set_base_addr(q, nor);
 
-		ret = spi_nor_scan(nor, NULL, SPI_NOR_QUAD);
+		ret = of_property_read_bool(np, "m25p,fast-read");
+		mode = (ret) ? SPI_NOR_FAST : SPI_NOR_QUAD;
+		/* Can we enable the DDR Quad Read? */
+		ret = of_property_read_bool(np, "ddr-quad-read");
 		if (ret)
-			goto mutex_failed;
+			mode = SPI_NOR_DDR_QUAD;
+
+		ret = spi_nor_scan(nor, NULL, mode);
+		if (ret)
+			continue;
 
 		ret = mtd_device_register(mtd, NULL, 0);
 		if (ret)
-			goto mutex_failed;
+			continue;
 
 		/* Set the correct NOR size now. */
 		if (q->nor_size == 0) {
@@ -1110,8 +1319,12 @@ static int fsl_qspi_probe(struct platfor
 			nor->page_size = q->devtype_data->txfifo;
 
 		i++;
+		find_node++;
 	}
 
+	if (find_node == 0)
+		goto mutex_failed;
+
 	/* finish the rest init. */
 	ret = fsl_qspi_nor_setup_last(q);
 	if (ret)
--- a/drivers/mtd/spi-nor/spi-nor.c
+++ b/drivers/mtd/spi-nor/spi-nor.c
@@ -40,6 +40,13 @@
 #define SPI_NOR_MAX_ID_LEN	6
 #define SPI_NOR_MAX_ADDR_WIDTH	4
 
+#define SPI_NOR_MICRON_WRITE_ENABLE    0x7f
+/* Added for S25FS-S family flash */
+#define SPINOR_CONFIG_REG3_OFFSET      0x800004
+#define CR3V_4KB_ERASE_UNABLE  0x8
+#define SPINOR_S25FS_FAMILY_ID 0x81
+
+
 struct flash_info {
 	char		*name;
 
@@ -68,7 +75,8 @@ struct flash_info {
 #define SECT_4K_PMC		BIT(4)	/* SPINOR_OP_BE_4K_PMC works uniformly */
 #define SPI_NOR_DUAL_READ	BIT(5)	/* Flash supports Dual Read */
 #define SPI_NOR_QUAD_READ	BIT(6)	/* Flash supports Quad Read */
-#define USE_FSR			BIT(7)	/* use flag status register */
+#define USE_FSR			BIT(13)	/* use flag status register */
+#define SPI_NOR_DDR_QUAD_READ	BIT(7)	/* Flash supports DDR Quad Read */
 #define SPI_NOR_HAS_LOCK	BIT(8)	/* Flash supports lock/unlock via SR */
 #define SPI_NOR_HAS_TB		BIT(9)	/*
 					 * Flash SR has Top/Bottom (TB) protect
@@ -85,9 +93,11 @@ struct flash_info {
 					 * Use dedicated 4byte address op codes
 					 * to support memory size above 128Mib.
 					 */
+#define NO_CHIP_ERASE		BIT(12) /* Chip does not support chip erase */
 };
 
 #define JEDEC_MFR(info)	((info)->id[0])
+#define EXT_ID(info)	((info)->id[5])
 
 static const struct flash_info *spi_nor_match_id(const char *name);
 
@@ -132,7 +142,7 @@ static int read_fsr(struct spi_nor *nor)
 /*
  * Read configuration register, returning its value in the
  * location. Return the configuration register value.
- * Returns negative if error occured.
+ * Returns negative if error occurred.
  */
 static int read_cr(struct spi_nor *nor)
 {
@@ -160,6 +170,8 @@ static inline int spi_nor_read_dummy_cyc
 	case SPI_NOR_DUAL:
 	case SPI_NOR_QUAD:
 		return 8;
+	case SPI_NOR_DDR_QUAD:
+		return 6;
 	case SPI_NOR_NORMAL:
 		return 0;
 	}
@@ -962,6 +974,8 @@ static const struct flash_info spi_nor_i
 
 	/* ESMT */
 	{ "f25l32pa", INFO(0x8c2016, 0, 64 * 1024, 64, SECT_4K | SPI_NOR_HAS_LOCK) },
+	{ "f25l32qa", INFO(0x8c4116, 0, 64 * 1024, 64, SECT_4K | SPI_NOR_HAS_LOCK) },
+	{ "f25l64qa", INFO(0x8c4117, 0, 64 * 1024, 128, SECT_4K | SPI_NOR_HAS_LOCK) },
 
 	/* Everspin */
 	{ "mr25h256", CAT25_INFO( 32 * 1024, 1, 256, 2, SPI_NOR_NO_ERASE | SPI_NOR_NO_FR) },
@@ -1015,12 +1029,15 @@ static const struct flash_info spi_nor_i
 	{ "mx25l3205d",  INFO(0xc22016, 0, 64 * 1024,  64, SECT_4K) },
 	{ "mx25l3255e",  INFO(0xc29e16, 0, 64 * 1024,  64, SECT_4K) },
 	{ "mx25l6405d",  INFO(0xc22017, 0, 64 * 1024, 128, SECT_4K) },
+	{ "mx25u2033e",  INFO(0xc22532, 0, 64 * 1024,   4, SECT_4K) },
+	{ "mx25u4035",   INFO(0xc22533, 0, 64 * 1024,   8, SECT_4K) },
+	{ "mx25u8035",   INFO(0xc22534, 0, 64 * 1024,  16, SECT_4K) },
 	{ "mx25u3235f",	 INFO(0xc22536, 0, 64 * 1024, 64, 0) },
 	{ "mx25u6435f",  INFO(0xc22537, 0, 64 * 1024, 128, SECT_4K) },
 	{ "mx25l12805d", INFO(0xc22018, 0, 64 * 1024, 256, 0) },
 	{ "mx25l12855e", INFO(0xc22618, 0, 64 * 1024, 256, 0) },
 	{ "mx25l25635e", INFO(0xc22019, 0, 64 * 1024, 512, 0) },
-	{ "mx25u25635f", INFO(0xc22539, 0, 64 * 1024, 512, SECT_4K | SPI_NOR_4B_OPCODES) },
+	{ "mx25u25635f", INFO(0xc22539, 0, 64 * 1024, 512, SECT_4K) },
 	{ "mx25l25655e", INFO(0xc22619, 0, 64 * 1024, 512, 0) },
 	{ "mx66l51235l", INFO(0xc2201a, 0, 64 * 1024, 1024, SPI_NOR_QUAD_READ) },
 	{ "mx66l1g55g",  INFO(0xc2261b, 0, 64 * 1024, 2048, SPI_NOR_QUAD_READ) },
@@ -1034,10 +1051,11 @@ static const struct flash_info spi_nor_i
 	{ "n25q128a11",  INFO(0x20bb18, 0, 64 * 1024,  256, SECT_4K | SPI_NOR_QUAD_READ) },
 	{ "n25q128a13",  INFO(0x20ba18, 0, 64 * 1024,  256, SECT_4K | SPI_NOR_QUAD_READ) },
 	{ "n25q256a",    INFO(0x20ba19, 0, 64 * 1024,  512, SECT_4K | SPI_NOR_QUAD_READ) },
+	{ "n25q256ax1",  INFO(0x20bb19, 0, 64 * 1024,  512, SECT_4K | SPI_NOR_QUAD_READ) },
 	{ "n25q512a",    INFO(0x20bb20, 0, 64 * 1024, 1024, SECT_4K | USE_FSR | SPI_NOR_QUAD_READ) },
 	{ "n25q512ax3",  INFO(0x20ba20, 0, 64 * 1024, 1024, SECT_4K | USE_FSR | SPI_NOR_QUAD_READ) },
-	{ "n25q00",      INFO(0x20ba21, 0, 64 * 1024, 2048, SECT_4K | USE_FSR | SPI_NOR_QUAD_READ) },
-	{ "n25q00a",     INFO(0x20bb21, 0, 64 * 1024, 2048, SECT_4K | USE_FSR | SPI_NOR_QUAD_READ) },
+	{ "n25q00",      INFO(0x20ba21, 0, 64 * 1024, 2048, SECT_4K | USE_FSR | SPI_NOR_QUAD_READ | NO_CHIP_ERASE) },
+	{ "n25q00a",     INFO(0x20bb21, 0, 64 * 1024, 2048, SECT_4K | USE_FSR | SPI_NOR_QUAD_READ | NO_CHIP_ERASE) },
 
 	/* PMC */
 	{ "pm25lv512",   INFO(0,        0, 32 * 1024,    2, SECT_4K_PMC) },
@@ -1055,8 +1073,11 @@ static const struct flash_info spi_nor_i
 	{ "s70fl01gs",  INFO(0x010221, 0x4d00, 256 * 1024, 256, 0) },
 	{ "s25sl12800", INFO(0x012018, 0x0300, 256 * 1024,  64, 0) },
 	{ "s25sl12801", INFO(0x012018, 0x0301,  64 * 1024, 256, 0) },
-	{ "s25fl128s",	INFO6(0x012018, 0x4d0180, 64 * 1024, 256, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
+	{ "s25fs256s1", INFO6(0x010219, 0x4d0181, 64 * 1024, 512, 0)},
+	{ "s25fl128s",	INFO6(0x012018, 0x4d0180, 64 * 1024, 256, SPI_NOR_QUAD_READ
+			| SPI_NOR_DDR_QUAD_READ) },
 	{ "s25fl129p0", INFO(0x012018, 0x4d00, 256 * 1024,  64, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
+	{ "s25fs512s",  INFO6(0x010220, 0x4d0081, 256 * 1024, 256, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ)},
 	{ "s25fl129p1", INFO(0x012018, 0x4d01,  64 * 1024, 256, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
 	{ "s25sl004a",  INFO(0x010212,      0,  64 * 1024,   8, 0) },
 	{ "s25sl008a",  INFO(0x010213,      0,  64 * 1024,  16, 0) },
@@ -1130,7 +1151,15 @@ static const struct flash_info spi_nor_i
 	{ "w25x40", INFO(0xef3013, 0, 64 * 1024,  8,  SECT_4K) },
 	{ "w25x80", INFO(0xef3014, 0, 64 * 1024,  16, SECT_4K) },
 	{ "w25x16", INFO(0xef3015, 0, 64 * 1024,  32, SECT_4K) },
+	{
+		"w25q16dw", INFO(0xef6015, 0, 64 * 1024,  32,
+			SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
+			SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
+	},
 	{ "w25x32", INFO(0xef3016, 0, 64 * 1024,  64, SECT_4K) },
+	{ "w25q20cl", INFO(0xef4012, 0, 64 * 1024,  4, SECT_4K) },
+	{ "w25q20bw", INFO(0xef5012, 0, 64 * 1024,  4, SECT_4K) },
+	{ "w25q20ew", INFO(0xef6012, 0, 64 * 1024,  4, SECT_4K) },
 	{ "w25q32", INFO(0xef4016, 0, 64 * 1024,  64, SECT_4K) },
 	{
 		"w25q32dw", INFO(0xef6016, 0, 64 * 1024,  64,
@@ -1197,6 +1226,53 @@ static const struct flash_info *spi_nor_
 		id[0], id[1], id[2]);
 	return ERR_PTR(-ENODEV);
 }
+/*
+ * The S25FS-S family physical sectors may be configured as a
+ * hybrid combination of eight 4-kB parameter sectors
+ * at the top or bottom of the address space with all
+ * but one of the remaining sectors being uniform size.
+ * The Parameter Sector Erase commands (20h or 21h) must
+ * be used to erase the 4-kB parameter sectors individually.
+ * The Sector (uniform sector) Erase commands (D8h or DCh)
+ * must be used to erase any of the remaining
+ * sectors, including the portion of highest or lowest address
+ * sector that is not overlaid by the parameter sectors.
+ * The uniform sector erase command has no effect on parameter sectors.
+ */
+static int spansion_s25fs_disable_4kb_erase(struct spi_nor *nor)
+{
+	struct fsl_qspi *q;
+	u32 cr3v_addr  = SPINOR_CONFIG_REG3_OFFSET;
+	u8 cr3v = 0x0;
+	int ret = 0x0;
+
+	q = nor->priv;
+
+	nor->cmd_buf[2] = cr3v_addr >> 16;
+	nor->cmd_buf[1] = cr3v_addr >> 8;
+	nor->cmd_buf[0] = cr3v_addr >> 0;
+
+	ret = nor->read_reg(nor, SPINOR_OP_SPANSION_RDAR, &cr3v, 1);
+	if (ret)
+		return ret;
+	if (cr3v & CR3V_4KB_ERASE_UNABLE)
+		return 0;
+	ret = nor->write_reg(nor, SPINOR_OP_WREN, NULL, 0);
+	if (ret)
+		return ret;
+	cr3v = CR3V_4KB_ERASE_UNABLE;
+	nor->program_opcode = SPINOR_OP_SPANSION_WRAR;
+	nor->write(nor, cr3v_addr, 1, &cr3v);
+
+	ret = nor->read_reg(nor, SPINOR_OP_SPANSION_RDAR, &cr3v, 1);
+	if (ret)
+		return ret;
+	if (!(cr3v & CR3V_4KB_ERASE_UNABLE))
+		return -EPERM;
+
+	return 0;
+}
+
 
 static int spi_nor_read(struct mtd_info *mtd, loff_t from, size_t len,
 			size_t *retlen, u_char *buf)
@@ -1416,7 +1492,7 @@ static int macronix_quad_enable(struct s
  * Write status Register and configuration register with 2 bytes
  * The first byte will be written to the status register, while the
  * second byte will be written to the configuration register.
- * Return negative if error occured.
+ * Return negative if error occurred.
  */
 static int write_sr_cr(struct spi_nor *nor, u16 val)
 {
@@ -1464,6 +1540,24 @@ static int spansion_quad_enable(struct s
 	return 0;
 }
 
+static int set_ddr_quad_mode(struct spi_nor *nor, const struct flash_info *info)
+{
+	int status;
+
+	switch (JEDEC_MFR(info)) {
+	case SNOR_MFR_SPANSION:
+		status = spansion_quad_enable(nor);
+		if (status) {
+			dev_err(nor->dev, "Spansion DDR quad-read not enabled\n");
+			return status;
+		}
+		return status;
+	default:
+		return -EINVAL;
+	}
+}
+
+
 static int set_quad_mode(struct spi_nor *nor, const struct flash_info *info)
 {
 	int status;
@@ -1610,9 +1704,25 @@ int spi_nor_scan(struct spi_nor *nor, co
 		write_sr(nor, 0);
 		spi_nor_wait_till_ready(nor);
 	}
+	if (JEDEC_MFR(info) == SNOR_MFR_MICRON) {
+		ret = read_sr(nor);
+		ret &= SPI_NOR_MICRON_WRITE_ENABLE;
+
+		write_enable(nor);
+		write_sr(nor, ret);
+	}
+
+	if (EXT_ID(info) == SPINOR_S25FS_FAMILY_ID) {
+		ret = spansion_s25fs_disable_4kb_erase(nor);
+		if (ret)
+			return ret;
+	}
+
 
 	if (!mtd->name)
 		mtd->name = dev_name(dev);
+	if (info->name)
+		nor->vendor = info->name;
 	mtd->priv = nor;
 	mtd->type = MTD_NORFLASH;
 	mtd->writesize = 1;
@@ -1646,6 +1756,8 @@ int spi_nor_scan(struct spi_nor *nor, co
 		nor->flags |= SNOR_F_USE_FSR;
 	if (info->flags & SPI_NOR_HAS_TB)
 		nor->flags |= SNOR_F_HAS_SR_TB;
+	if (info->flags & NO_CHIP_ERASE)
+		nor->flags |= SNOR_F_NO_OP_CHIP_ERASE;
 
 #ifdef CONFIG_MTD_SPI_NOR_USE_4K_SECTORS
 	/* prefer "small sector" erase if possible */
@@ -1685,9 +1797,15 @@ int spi_nor_scan(struct spi_nor *nor, co
 	/* Some devices cannot do fast-read, no matter what DT tells us */
 	if (info->flags & SPI_NOR_NO_FR)
 		nor->flash_read = SPI_NOR_NORMAL;
-
-	/* Quad/Dual-read mode takes precedence over fast/normal */
-	if (mode == SPI_NOR_QUAD && info->flags & SPI_NOR_QUAD_READ) {
+	/* DDR Quad/Quad/Dual-read mode takes precedence over fast/normal */
+	if (mode == SPI_NOR_DDR_QUAD && info->flags & SPI_NOR_DDR_QUAD_READ) {
+		ret = set_ddr_quad_mode(nor, info);
+		if (ret) {
+			dev_err(dev, "DDR quad mode not supported\n");
+			return ret;
+		}
+		nor->flash_read = SPI_NOR_DDR_QUAD;
+	} else if (mode == SPI_NOR_QUAD && info->flags & SPI_NOR_QUAD_READ) {
 		ret = set_quad_mode(nor, info);
 		if (ret) {
 			dev_err(dev, "quad mode not supported\n");
@@ -1700,6 +1818,9 @@ int spi_nor_scan(struct spi_nor *nor, co
 
 	/* Default commands */
 	switch (nor->flash_read) {
+	case SPI_NOR_DDR_QUAD:
+		nor->read_opcode = SPINOR_OP_READ4_1_4_4_D;
+		break;
 	case SPI_NOR_QUAD:
 		nor->read_opcode = SPINOR_OP_READ_1_1_4;
 		break;
--- a/include/linux/mtd/spi-nor.h
+++ b/include/linux/mtd/spi-nor.h
@@ -31,10 +31,10 @@
 
 /*
  * Note on opcode nomenclature: some opcodes have a format like
- * SPINOR_OP_FUNCTION{4,}_x_y_z. The numbers x, y, and z stand for the number
+ * SPINOR_OP_FUNCTION{4,}_x_y_z{_D}. The numbers x, y,and z stand for the number
  * of I/O lines used for the opcode, address, and data (respectively). The
  * FUNCTION has an optional suffix of '4', to represent an opcode which
- * requires a 4-byte (32-bit) address.
+ * requires a 4-byte (32-bit) address. The suffix of 'D' stands for the
  */
 
 /* Flash opcodes. */
@@ -46,7 +46,9 @@
 #define SPINOR_OP_READ_1_1_2	0x3b	/* Read data bytes (Dual Output SPI) */
 #define SPINOR_OP_READ_1_2_2	0xbb	/* Read data bytes (Dual I/O SPI) */
 #define SPINOR_OP_READ_1_1_4	0x6b	/* Read data bytes (Quad Output SPI) */
+#define SPINOR_OP_READ_1_4_4_D	0xed	/* Read data bytes (DDR Quad SPI) */
 #define SPINOR_OP_READ_1_4_4	0xeb	/* Read data bytes (Quad I/O SPI) */
+#define SPINOR_OP_READ4_1_4_4_D	0xee	/* Read data bytes (DDR Quad SPI) */
 #define SPINOR_OP_PP		0x02	/* Page program (up to 256 bytes) */
 #define SPINOR_OP_PP_1_1_4	0x32	/* Quad page program */
 #define SPINOR_OP_PP_1_4_4	0x38	/* Quad page program */
@@ -62,9 +64,11 @@
 /* 4-byte address opcodes - used on Spansion and some Macronix flashes. */
 #define SPINOR_OP_READ_4B	0x13	/* Read data bytes (low frequency) */
 #define SPINOR_OP_READ_FAST_4B	0x0c	/* Read data bytes (high frequency) */
+#define SPINOR_OP_READ4_FAST    0x0c    /* Read data bytes (high frequency) */
 #define SPINOR_OP_READ_1_1_2_4B	0x3c	/* Read data bytes (Dual Output SPI) */
 #define SPINOR_OP_READ_1_2_2_4B	0xbc	/* Read data bytes (Dual I/O SPI) */
 #define SPINOR_OP_READ_1_1_4_4B	0x6c	/* Read data bytes (Quad Output SPI) */
+#define SPINOR_OP_READ4_1_1_4  0x6c    /* Read data bytes (Quad SPI) */
 #define SPINOR_OP_READ_1_4_4_4B	0xec	/* Read data bytes (Quad I/O SPI) */
 #define SPINOR_OP_PP_4B		0x12	/* Page program (up to 256 bytes) */
 #define SPINOR_OP_PP_1_1_4_4B	0x34	/* Quad page program */
@@ -94,6 +98,10 @@
 /* Used for Spansion flashes only. */
 #define SPINOR_OP_BRWR		0x17	/* Bank register write */
 
+/* Used for Spansion S25FS-S family flash only. */
+#define SPINOR_OP_SPANSION_RDAR	0x65	/* Read any device register */
+#define SPINOR_OP_SPANSION_WRAR	0x71	/* Write any device register */
+
 /* Used for Micron flashes only. */
 #define SPINOR_OP_RD_EVCR      0x65    /* Read EVCR register */
 #define SPINOR_OP_WD_EVCR      0x61    /* Write EVCR register */
@@ -124,6 +132,7 @@ enum read_mode {
 	SPI_NOR_FAST,
 	SPI_NOR_DUAL,
 	SPI_NOR_QUAD,
+	SPI_NOR_DDR_QUAD,
 };
 
 #define SPI_NOR_MAX_CMD_SIZE	8
@@ -189,6 +198,7 @@ struct spi_nor {
 	bool			sst_write_second;
 	u32			flags;
 	u8			cmd_buf[SPI_NOR_MAX_CMD_SIZE];
+	char			*vendor;
 
 	int (*prepare)(struct spi_nor *nor, enum spi_nor_ops ops);
 	void (*unprepare)(struct spi_nor *nor, enum spi_nor_ops ops);