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From:   Frieder Schrempf <frieder.schrempf@exceet.de>
To:     linux-mtd@lists.infradead.org, boris.brezillon@bootlin.com,
        linux-spi@vger.kernel.org
Cc:     dwmw2@infradead.org, computersforpeace@gmail.com,
        marek.vasut@gmail.com, richard@nod.at, miquel.raynal@bootlin.com,
        broonie@kernel.org, david.wolfe@nxp.com, fabio.estevam@nxp.com,
        prabhakar.kushwaha@nxp.com, yogeshnarayan.gaur@nxp.com,
        han.xu@nxp.com, shawnguo@kernel.org,
        Frieder Schrempf <frieder.schrempf@exceet.de>,
        linux-kernel@vger.kernel.org
Subject: [PATCH v2 09/12] mtd: fsl-quadspi: Remove the driver as it was replaced by spi-fsl-qspi.c
Date:   Thu,  5 Jul 2018 13:15:05 +0200
Message-Id: <1530789310-16254-10-git-send-email-frieder.schrempf@exceet.de>
In-Reply-To: <1530789310-16254-1-git-send-email-frieder.schrempf@exceet.de>
References: <1530789310-16254-1-git-send-email-frieder.schrempf@exceet.de>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

There's a new driver using the SPI memory interface of the SPI framework
at spi/spi-fsl-qspi.c, which can be used together with m25p80.c to
replace the functionality of this SPI NOR driver.

Signed-off-by: Frieder Schrempf <frieder.schrempf@exceet.de>
---
 drivers/mtd/spi-nor/Kconfig       |    9 -
 drivers/mtd/spi-nor/Makefile      |    1 -
 drivers/mtd/spi-nor/fsl-quadspi.c | 1217 --------------------------------
 3 files changed, 1227 deletions(-)

diff --git a/drivers/mtd/spi-nor/Kconfig b/drivers/mtd/spi-nor/Kconfig
index 6cc9c92..d1ca307 100644
--- a/drivers/mtd/spi-nor/Kconfig
+++ b/drivers/mtd/spi-nor/Kconfig
@@ -59,15 +59,6 @@ config SPI_CADENCE_QUADSPI
 	  device with a Cadence QSPI controller and want to access the
 	  Flash as an MTD device.
 
-config SPI_FSL_QUADSPI
-	tristate "Freescale Quad SPI controller"
-	depends on ARCH_MXC || SOC_LS1021A || ARCH_LAYERSCAPE || COMPILE_TEST
-	depends on HAS_IOMEM
-	help
-	  This enables support for the Quad SPI controller in master mode.
-	  This controller does not support generic SPI. It only supports
-	  SPI NOR.
-
 config SPI_HISI_SFC
 	tristate "Hisilicon SPI-NOR Flash Controller(SFC)"
 	depends on ARCH_HISI || COMPILE_TEST
diff --git a/drivers/mtd/spi-nor/Makefile b/drivers/mtd/spi-nor/Makefile
index f4c61d2..3f160c2e3 100644
--- a/drivers/mtd/spi-nor/Makefile
+++ b/drivers/mtd/spi-nor/Makefile
@@ -3,7 +3,6 @@ obj-$(CONFIG_MTD_SPI_NOR)	+= spi-nor.o
 obj-$(CONFIG_SPI_ASPEED_SMC)	+= aspeed-smc.o
 obj-$(CONFIG_SPI_ATMEL_QUADSPI)	+= atmel-quadspi.o
 obj-$(CONFIG_SPI_CADENCE_QUADSPI)	+= cadence-quadspi.o
-obj-$(CONFIG_SPI_FSL_QUADSPI)	+= fsl-quadspi.o
 obj-$(CONFIG_SPI_HISI_SFC)	+= hisi-sfc.o
 obj-$(CONFIG_MTD_MT81xx_NOR)    += mtk-quadspi.o
 obj-$(CONFIG_SPI_NXP_SPIFI)	+= nxp-spifi.o
diff --git a/drivers/mtd/spi-nor/fsl-quadspi.c b/drivers/mtd/spi-nor/fsl-quadspi.c
deleted file mode 100644
index 7d9620c..0000000
--- a/drivers/mtd/spi-nor/fsl-quadspi.c
+++ /dev/null
@@ -1,1217 +0,0 @@
-/*
- * Freescale QuadSPI driver.
- *
- * Copyright (C) 2013 Freescale Semiconductor, Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/interrupt.h>
-#include <linux/errno.h>
-#include <linux/platform_device.h>
-#include <linux/sched.h>
-#include <linux/delay.h>
-#include <linux/io.h>
-#include <linux/clk.h>
-#include <linux/err.h>
-#include <linux/of.h>
-#include <linux/of_device.h>
-#include <linux/timer.h>
-#include <linux/jiffies.h>
-#include <linux/completion.h>
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/partitions.h>
-#include <linux/mtd/spi-nor.h>
-#include <linux/mutex.h>
-#include <linux/pm_qos.h>
-#include <linux/sizes.h>
-
-/* Controller needs driver to swap endian */
-#define QUADSPI_QUIRK_SWAP_ENDIAN	(1 << 0)
-/* Controller needs 4x internal clock */
-#define QUADSPI_QUIRK_4X_INT_CLK	(1 << 1)
-/*
- * TKT253890, Controller needs driver to fill txfifo till 16 byte to
- * trigger data transfer even though extern data will not transferred.
- */
-#define QUADSPI_QUIRK_TKT253890		(1 << 2)
-/* Controller cannot wake up from wait mode, TKT245618 */
-#define QUADSPI_QUIRK_TKT245618         (1 << 3)
-
-/* The registers */
-#define QUADSPI_MCR			0x00
-#define QUADSPI_MCR_RESERVED_SHIFT	16
-#define QUADSPI_MCR_RESERVED_MASK	(0xF << QUADSPI_MCR_RESERVED_SHIFT)
-#define QUADSPI_MCR_MDIS_SHIFT		14
-#define QUADSPI_MCR_MDIS_MASK		(1 << QUADSPI_MCR_MDIS_SHIFT)
-#define QUADSPI_MCR_CLR_TXF_SHIFT	11
-#define QUADSPI_MCR_CLR_TXF_MASK	(1 << QUADSPI_MCR_CLR_TXF_SHIFT)
-#define QUADSPI_MCR_CLR_RXF_SHIFT	10
-#define QUADSPI_MCR_CLR_RXF_MASK	(1 << QUADSPI_MCR_CLR_RXF_SHIFT)
-#define QUADSPI_MCR_DDR_EN_SHIFT	7
-#define QUADSPI_MCR_DDR_EN_MASK		(1 << QUADSPI_MCR_DDR_EN_SHIFT)
-#define QUADSPI_MCR_END_CFG_SHIFT	2
-#define QUADSPI_MCR_END_CFG_MASK	(3 << QUADSPI_MCR_END_CFG_SHIFT)
-#define QUADSPI_MCR_SWRSTHD_SHIFT	1
-#define QUADSPI_MCR_SWRSTHD_MASK	(1 << QUADSPI_MCR_SWRSTHD_SHIFT)
-#define QUADSPI_MCR_SWRSTSD_SHIFT	0
-#define QUADSPI_MCR_SWRSTSD_MASK	(1 << QUADSPI_MCR_SWRSTSD_SHIFT)
-
-#define QUADSPI_IPCR			0x08
-#define QUADSPI_IPCR_SEQID_SHIFT	24
-#define QUADSPI_IPCR_SEQID_MASK		(0xF << QUADSPI_IPCR_SEQID_SHIFT)
-
-#define QUADSPI_BUF0CR			0x10
-#define QUADSPI_BUF1CR			0x14
-#define QUADSPI_BUF2CR			0x18
-#define QUADSPI_BUFXCR_INVALID_MSTRID	0xe
-
-#define QUADSPI_BUF3CR			0x1c
-#define QUADSPI_BUF3CR_ALLMST_SHIFT	31
-#define QUADSPI_BUF3CR_ALLMST_MASK	(1 << QUADSPI_BUF3CR_ALLMST_SHIFT)
-#define QUADSPI_BUF3CR_ADATSZ_SHIFT		8
-#define QUADSPI_BUF3CR_ADATSZ_MASK	(0xFF << QUADSPI_BUF3CR_ADATSZ_SHIFT)
-
-#define QUADSPI_BFGENCR			0x20
-#define QUADSPI_BFGENCR_PAR_EN_SHIFT	16
-#define QUADSPI_BFGENCR_PAR_EN_MASK	(1 << (QUADSPI_BFGENCR_PAR_EN_SHIFT))
-#define QUADSPI_BFGENCR_SEQID_SHIFT	12
-#define QUADSPI_BFGENCR_SEQID_MASK	(0xF << QUADSPI_BFGENCR_SEQID_SHIFT)
-
-#define QUADSPI_BUF0IND			0x30
-#define QUADSPI_BUF1IND			0x34
-#define QUADSPI_BUF2IND			0x38
-#define QUADSPI_SFAR			0x100
-
-#define QUADSPI_SMPR			0x108
-#define QUADSPI_SMPR_DDRSMP_SHIFT	16
-#define QUADSPI_SMPR_DDRSMP_MASK	(7 << QUADSPI_SMPR_DDRSMP_SHIFT)
-#define QUADSPI_SMPR_FSDLY_SHIFT	6
-#define QUADSPI_SMPR_FSDLY_MASK		(1 << QUADSPI_SMPR_FSDLY_SHIFT)
-#define QUADSPI_SMPR_FSPHS_SHIFT	5
-#define QUADSPI_SMPR_FSPHS_MASK		(1 << QUADSPI_SMPR_FSPHS_SHIFT)
-#define QUADSPI_SMPR_HSENA_SHIFT	0
-#define QUADSPI_SMPR_HSENA_MASK		(1 << QUADSPI_SMPR_HSENA_SHIFT)
-
-#define QUADSPI_RBSR			0x10c
-#define QUADSPI_RBSR_RDBFL_SHIFT	8
-#define QUADSPI_RBSR_RDBFL_MASK		(0x3F << QUADSPI_RBSR_RDBFL_SHIFT)
-
-#define QUADSPI_RBCT			0x110
-#define QUADSPI_RBCT_WMRK_MASK		0x1F
-#define QUADSPI_RBCT_RXBRD_SHIFT	8
-#define QUADSPI_RBCT_RXBRD_USEIPS	(0x1 << QUADSPI_RBCT_RXBRD_SHIFT)
-
-#define QUADSPI_TBSR			0x150
-#define QUADSPI_TBDR			0x154
-#define QUADSPI_SR			0x15c
-#define QUADSPI_SR_IP_ACC_SHIFT		1
-#define QUADSPI_SR_IP_ACC_MASK		(0x1 << QUADSPI_SR_IP_ACC_SHIFT)
-#define QUADSPI_SR_AHB_ACC_SHIFT	2
-#define QUADSPI_SR_AHB_ACC_MASK		(0x1 << QUADSPI_SR_AHB_ACC_SHIFT)
-
-#define QUADSPI_FR			0x160
-#define QUADSPI_FR_TFF_MASK		0x1
-
-#define QUADSPI_SFA1AD			0x180
-#define QUADSPI_SFA2AD			0x184
-#define QUADSPI_SFB1AD			0x188
-#define QUADSPI_SFB2AD			0x18c
-#define QUADSPI_RBDR			0x200
-
-#define QUADSPI_LUTKEY			0x300
-#define QUADSPI_LUTKEY_VALUE		0x5AF05AF0
-
-#define QUADSPI_LCKCR			0x304
-#define QUADSPI_LCKER_LOCK		0x1
-#define QUADSPI_LCKER_UNLOCK		0x2
-
-#define QUADSPI_RSER			0x164
-#define QUADSPI_RSER_TFIE		(0x1 << 0)
-
-#define QUADSPI_LUT_BASE		0x310
-
-/*
- * The definition of the LUT register shows below:
- *
- *  ---------------------------------------------------
- *  | INSTR1 | PAD1 | OPRND1 | INSTR0 | PAD0 | OPRND0 |
- *  ---------------------------------------------------
- */
-#define OPRND0_SHIFT		0
-#define PAD0_SHIFT		8
-#define INSTR0_SHIFT		10
-#define OPRND1_SHIFT		16
-
-/* Instruction set for the LUT register. */
-#define LUT_STOP		0
-#define LUT_CMD			1
-#define LUT_ADDR		2
-#define LUT_DUMMY		3
-#define LUT_MODE		4
-#define LUT_MODE2		5
-#define LUT_MODE4		6
-#define LUT_FSL_READ		7
-#define LUT_FSL_WRITE		8
-#define LUT_JMP_ON_CS		9
-#define LUT_ADDR_DDR		10
-#define LUT_MODE_DDR		11
-#define LUT_MODE2_DDR		12
-#define LUT_MODE4_DDR		13
-#define LUT_FSL_READ_DDR		14
-#define LUT_FSL_WRITE_DDR		15
-#define LUT_DATA_LEARN		16
-
-/*
- * The PAD definitions for LUT register.
- *
- * The pad stands for the lines number of IO[0:3].
- * For example, the Quad read need four IO lines, so you should
- * set LUT_PAD4 which means we use four IO lines.
- */
-#define LUT_PAD1		0
-#define LUT_PAD2		1
-#define LUT_PAD4		2
-
-/* Oprands for the LUT register. */
-#define ADDR24BIT		0x18
-#define ADDR32BIT		0x20
-
-/* Macros for constructing the LUT register. */
-#define LUT0(ins, pad, opr)						\
-		(((opr) << OPRND0_SHIFT) | ((LUT_##pad) << PAD0_SHIFT) | \
-		((LUT_##ins) << INSTR0_SHIFT))
-
-#define LUT1(ins, pad, opr)	(LUT0(ins, pad, opr) << OPRND1_SHIFT)
-
-/* other macros for LUT register. */
-#define QUADSPI_LUT(x)          (QUADSPI_LUT_BASE + (x) * 4)
-#define QUADSPI_LUT_NUM		64
-
-/* SEQID -- we can have 16 seqids at most. */
-#define SEQID_READ		0
-#define SEQID_WREN		1
-#define SEQID_WRDI		2
-#define SEQID_RDSR		3
-#define SEQID_SE		4
-#define SEQID_CHIP_ERASE	5
-#define SEQID_PP		6
-#define SEQID_RDID		7
-#define SEQID_WRSR		8
-#define SEQID_RDCR		9
-#define SEQID_EN4B		10
-#define SEQID_BRWR		11
-
-#define QUADSPI_MIN_IOMAP SZ_4M
-
-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 {
-	enum fsl_qspi_devtype devtype;
-	int rxfifo;
-	int txfifo;
-	int ahb_buf_size;
-	int driver_data;
-};
-
-static const struct fsl_qspi_devtype_data vybrid_data = {
-	.devtype = FSL_QUADSPI_VYBRID,
-	.rxfifo = 128,
-	.txfifo = 64,
-	.ahb_buf_size = 1024,
-	.driver_data = QUADSPI_QUIRK_SWAP_ENDIAN,
-};
-
-static const struct fsl_qspi_devtype_data imx6sx_data = {
-	.devtype = FSL_QUADSPI_IMX6SX,
-	.rxfifo = 128,
-	.txfifo = 512,
-	.ahb_buf_size = 1024,
-	.driver_data = QUADSPI_QUIRK_4X_INT_CLK
-		       | QUADSPI_QUIRK_TKT245618,
-};
-
-static const struct fsl_qspi_devtype_data imx7d_data = {
-	.devtype = FSL_QUADSPI_IMX7D,
-	.rxfifo = 512,
-	.txfifo = 512,
-	.ahb_buf_size = 1024,
-	.driver_data = QUADSPI_QUIRK_TKT253890
-		       | QUADSPI_QUIRK_4X_INT_CLK,
-};
-
-static const struct fsl_qspi_devtype_data imx6ul_data = {
-	.devtype = FSL_QUADSPI_IMX6UL,
-	.rxfifo = 128,
-	.txfifo = 512,
-	.ahb_buf_size = 1024,
-	.driver_data = QUADSPI_QUIRK_TKT253890
-		       | QUADSPI_QUIRK_4X_INT_CLK,
-};
-
-static struct fsl_qspi_devtype_data ls1021a_data = {
-	.devtype = FSL_QUADSPI_LS1021A,
-	.rxfifo = 128,
-	.txfifo = 64,
-	.ahb_buf_size = 1024,
-	.driver_data = 0,
-};
-
-static const struct fsl_qspi_devtype_data ls2080a_data = {
-	.devtype = FSL_QUADSPI_LS2080A,
-	.rxfifo = 128,
-	.txfifo = 64,
-	.ahb_buf_size = 1024,
-	.driver_data = QUADSPI_QUIRK_TKT253890,
-};
-
-
-#define FSL_QSPI_MAX_CHIP	4
-struct fsl_qspi {
-	struct spi_nor nor[FSL_QSPI_MAX_CHIP];
-	void __iomem *iobase;
-	void __iomem *ahb_addr;
-	u32 memmap_phy;
-	u32 memmap_offs;
-	u32 memmap_len;
-	struct clk *clk, *clk_en;
-	struct device *dev;
-	struct completion c;
-	const struct fsl_qspi_devtype_data *devtype_data;
-	u32 nor_size;
-	u32 nor_num;
-	u32 clk_rate;
-	unsigned int chip_base_addr; /* We may support two chips. */
-	bool has_second_chip;
-	bool big_endian;
-	struct mutex lock;
-	struct pm_qos_request pm_qos_req;
-};
-
-static inline int needs_swap_endian(struct fsl_qspi *q)
-{
-	return q->devtype_data->driver_data & QUADSPI_QUIRK_SWAP_ENDIAN;
-}
-
-static inline int needs_4x_clock(struct fsl_qspi *q)
-{
-	return q->devtype_data->driver_data & QUADSPI_QUIRK_4X_INT_CLK;
-}
-
-static inline int needs_fill_txfifo(struct fsl_qspi *q)
-{
-	return q->devtype_data->driver_data & QUADSPI_QUIRK_TKT253890;
-}
-
-static inline int needs_wakeup_wait_mode(struct fsl_qspi *q)
-{
-	return q->devtype_data->driver_data & QUADSPI_QUIRK_TKT245618;
-}
-
-/*
- * R/W functions for big- or little-endian registers:
- * The qSPI controller's endian is independent of the CPU core's endian.
- * So far, although the CPU core is little-endian but the qSPI have two
- * versions for big-endian and little-endian.
- */
-static void qspi_writel(struct fsl_qspi *q, u32 val, void __iomem *addr)
-{
-	if (q->big_endian)
-		iowrite32be(val, addr);
-	else
-		iowrite32(val, addr);
-}
-
-static u32 qspi_readl(struct fsl_qspi *q, void __iomem *addr)
-{
-	if (q->big_endian)
-		return ioread32be(addr);
-	else
-		return ioread32(addr);
-}
-
-/*
- * An IC bug makes us to re-arrange the 32-bit data.
- * The following chips, such as IMX6SLX, have fixed this bug.
- */
-static inline u32 fsl_qspi_endian_xchg(struct fsl_qspi *q, u32 a)
-{
-	return needs_swap_endian(q) ? __swab32(a) : a;
-}
-
-static inline void fsl_qspi_unlock_lut(struct fsl_qspi *q)
-{
-	qspi_writel(q, QUADSPI_LUTKEY_VALUE, q->iobase + QUADSPI_LUTKEY);
-	qspi_writel(q, QUADSPI_LCKER_UNLOCK, q->iobase + QUADSPI_LCKCR);
-}
-
-static inline void fsl_qspi_lock_lut(struct fsl_qspi *q)
-{
-	qspi_writel(q, QUADSPI_LUTKEY_VALUE, q->iobase + QUADSPI_LUTKEY);
-	qspi_writel(q, QUADSPI_LCKER_LOCK, q->iobase + QUADSPI_LCKCR);
-}
-
-static irqreturn_t fsl_qspi_irq_handler(int irq, void *dev_id)
-{
-	struct fsl_qspi *q = dev_id;
-	u32 reg;
-
-	/* clear interrupt */
-	reg = qspi_readl(q, q->iobase + QUADSPI_FR);
-	qspi_writel(q, reg, q->iobase + QUADSPI_FR);
-
-	if (reg & QUADSPI_FR_TFF_MASK)
-		complete(&q->c);
-
-	dev_dbg(q->dev, "QUADSPI_FR : 0x%.8x:0x%.8x\n", q->chip_base_addr, reg);
-	return IRQ_HANDLED;
-}
-
-static void fsl_qspi_init_lut(struct fsl_qspi *q)
-{
-	void __iomem *base = q->iobase;
-	int rxfifo = q->devtype_data->rxfifo;
-	u32 lut_base;
-	int i;
-
-	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;
-
-	fsl_qspi_unlock_lut(q);
-
-	/* Clear all the LUT table */
-	for (i = 0; i < QUADSPI_LUT_NUM; i++)
-		qspi_writel(q, 0, base + QUADSPI_LUT_BASE + i * 4);
-
-	/* Read */
-	lut_base = SEQID_READ * 4;
-
-	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));
-
-	/* Write enable */
-	lut_base = SEQID_WREN * 4;
-	qspi_writel(q, LUT0(CMD, PAD1, SPINOR_OP_WREN),
-			base + QUADSPI_LUT(lut_base));
-
-	/* Page Program */
-	lut_base = SEQID_PP * 4;
-
-	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));
-
-	/* Read Status */
-	lut_base = SEQID_RDSR * 4;
-	qspi_writel(q, LUT0(CMD, PAD1, SPINOR_OP_RDSR) |
-			LUT1(FSL_READ, PAD1, 0x1),
-			base + QUADSPI_LUT(lut_base));
-
-	/* Erase a sector */
-	lut_base = SEQID_SE * 4;
-
-	qspi_writel(q, LUT0(CMD, PAD1, nor->erase_opcode) |
-		    LUT1(ADDR, PAD1, addrlen),
-			base + QUADSPI_LUT(lut_base));
-
-	/* Erase the whole chip */
-	lut_base = SEQID_CHIP_ERASE * 4;
-	qspi_writel(q, LUT0(CMD, PAD1, SPINOR_OP_CHIP_ERASE),
-			base + QUADSPI_LUT(lut_base));
-
-	/* READ ID */
-	lut_base = SEQID_RDID * 4;
-	qspi_writel(q, LUT0(CMD, PAD1, SPINOR_OP_RDID) |
-			LUT1(FSL_READ, PAD1, 0x8),
-			base + QUADSPI_LUT(lut_base));
-
-	/* Write Register */
-	lut_base = SEQID_WRSR * 4;
-	qspi_writel(q, LUT0(CMD, PAD1, SPINOR_OP_WRSR) |
-			LUT1(FSL_WRITE, PAD1, 0x2),
-			base + QUADSPI_LUT(lut_base));
-
-	/* Read Configuration Register */
-	lut_base = SEQID_RDCR * 4;
-	qspi_writel(q, LUT0(CMD, PAD1, SPINOR_OP_RDCR) |
-			LUT1(FSL_READ, PAD1, 0x1),
-			base + QUADSPI_LUT(lut_base));
-
-	/* Write disable */
-	lut_base = SEQID_WRDI * 4;
-	qspi_writel(q, LUT0(CMD, PAD1, SPINOR_OP_WRDI),
-			base + QUADSPI_LUT(lut_base));
-
-	/* Enter 4 Byte Mode (Micron) */
-	lut_base = SEQID_EN4B * 4;
-	qspi_writel(q, LUT0(CMD, PAD1, SPINOR_OP_EN4B),
-			base + QUADSPI_LUT(lut_base));
-
-	/* Enter 4 Byte Mode (Spansion) */
-	lut_base = SEQID_BRWR * 4;
-	qspi_writel(q, LUT0(CMD, PAD1, SPINOR_OP_BRWR),
-			base + QUADSPI_LUT(lut_base));
-
-	fsl_qspi_lock_lut(q);
-}
-
-/* Get the SEQID for the command */
-static int fsl_qspi_get_seqid(struct fsl_qspi *q, u8 cmd)
-{
-	switch (cmd) {
-	case SPINOR_OP_READ_1_1_4:
-		return SEQID_READ;
-	case SPINOR_OP_WREN:
-		return SEQID_WREN;
-	case SPINOR_OP_WRDI:
-		return SEQID_WRDI;
-	case SPINOR_OP_RDSR:
-		return SEQID_RDSR;
-	case SPINOR_OP_SE:
-		return SEQID_SE;
-	case SPINOR_OP_CHIP_ERASE:
-		return SEQID_CHIP_ERASE;
-	case SPINOR_OP_PP:
-		return SEQID_PP;
-	case SPINOR_OP_RDID:
-		return SEQID_RDID;
-	case SPINOR_OP_WRSR:
-		return SEQID_WRSR;
-	case SPINOR_OP_RDCR:
-		return SEQID_RDCR;
-	case SPINOR_OP_EN4B:
-		return SEQID_EN4B;
-	case SPINOR_OP_BRWR:
-		return SEQID_BRWR;
-	default:
-		if (cmd == q->nor[0].erase_opcode)
-			return SEQID_SE;
-		dev_err(q->dev, "Unsupported cmd 0x%.2x\n", cmd);
-		break;
-	}
-	return -EINVAL;
-}
-
-static int
-fsl_qspi_runcmd(struct fsl_qspi *q, u8 cmd, unsigned int addr, int len)
-{
-	void __iomem *base = q->iobase;
-	int seqid;
-	u32 reg, reg2;
-	int err;
-
-	init_completion(&q->c);
-	dev_dbg(q->dev, "to 0x%.8x:0x%.8x, len:%d, cmd:%.2x\n",
-			q->chip_base_addr, addr, len, cmd);
-
-	/* save the reg */
-	reg = qspi_readl(q, base + QUADSPI_MCR);
-
-	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);
-
-	do {
-		reg2 = qspi_readl(q, base + QUADSPI_SR);
-		if (reg2 & (QUADSPI_SR_IP_ACC_MASK | QUADSPI_SR_AHB_ACC_MASK)) {
-			udelay(1);
-			dev_dbg(q->dev, "The controller is busy, 0x%x\n", reg2);
-			continue;
-		}
-		break;
-	} while (1);
-
-	/* trigger the LUT now */
-	seqid = fsl_qspi_get_seqid(q, cmd);
-	qspi_writel(q, (seqid << QUADSPI_IPCR_SEQID_SHIFT) | len,
-			base + QUADSPI_IPCR);
-
-	/* Wait for the interrupt. */
-	if (!wait_for_completion_timeout(&q->c, msecs_to_jiffies(1000))) {
-		dev_err(q->dev,
-			"cmd 0x%.2x timeout, addr@%.8x, FR:0x%.8x, SR:0x%.8x\n",
-			cmd, addr, qspi_readl(q, base + QUADSPI_FR),
-			qspi_readl(q, base + QUADSPI_SR));
-		err = -ETIMEDOUT;
-	} else {
-		err = 0;
-	}
-
-	/* restore the MCR */
-	qspi_writel(q, reg, base + QUADSPI_MCR);
-
-	return err;
-}
-
-/* Read out the data from the QUADSPI_RBDR buffer registers. */
-static void fsl_qspi_read_data(struct fsl_qspi *q, int len, u8 *rxbuf)
-{
-	u32 tmp;
-	int i = 0;
-
-	while (len > 0) {
-		tmp = qspi_readl(q, q->iobase + QUADSPI_RBDR + i * 4);
-		tmp = fsl_qspi_endian_xchg(q, tmp);
-		dev_dbg(q->dev, "chip addr:0x%.8x, rcv:0x%.8x\n",
-				q->chip_base_addr, tmp);
-
-		if (len >= 4) {
-			*((u32 *)rxbuf) = tmp;
-			rxbuf += 4;
-		} else {
-			memcpy(rxbuf, &tmp, len);
-			break;
-		}
-
-		len -= 4;
-		i++;
-	}
-}
-
-/*
- * If we have changed the content of the flash by writing or erasing,
- * we need to invalidate the AHB buffer. If we do not do so, we may read out
- * the wrong data. The spec tells us reset the AHB domain and Serial Flash
- * domain at the same time.
- */
-static inline void fsl_qspi_invalid(struct fsl_qspi *q)
-{
-	u32 reg;
-
-	reg = qspi_readl(q, q->iobase + QUADSPI_MCR);
-	reg |= QUADSPI_MCR_SWRSTHD_MASK | QUADSPI_MCR_SWRSTSD_MASK;
-	qspi_writel(q, reg, q->iobase + QUADSPI_MCR);
-
-	/*
-	 * The minimum delay : 1 AHB + 2 SFCK clocks.
-	 * Delay 1 us is enough.
-	 */
-	udelay(1);
-
-	reg &= ~(QUADSPI_MCR_SWRSTHD_MASK | QUADSPI_MCR_SWRSTSD_MASK);
-	qspi_writel(q, reg, q->iobase + QUADSPI_MCR);
-}
-
-static ssize_t fsl_qspi_nor_write(struct fsl_qspi *q, struct spi_nor *nor,
-				u8 opcode, unsigned int to, u32 *txbuf,
-				unsigned count)
-{
-	int ret, i, j;
-	u32 tmp;
-
-	dev_dbg(q->dev, "to 0x%.8x:0x%.8x, len : %d\n",
-		q->chip_base_addr, to, count);
-
-	/* clear the TX FIFO. */
-	tmp = qspi_readl(q, q->iobase + QUADSPI_MCR);
-	qspi_writel(q, tmp | QUADSPI_MCR_CLR_TXF_MASK, q->iobase + QUADSPI_MCR);
-
-	/* fill the TX data to the FIFO */
-	for (j = 0, i = ((count + 3) / 4); j < i; j++) {
-		tmp = fsl_qspi_endian_xchg(q, *txbuf);
-		qspi_writel(q, tmp, q->iobase + QUADSPI_TBDR);
-		txbuf++;
-	}
-
-	/* fill the TXFIFO upto 16 bytes for i.MX7d */
-	if (needs_fill_txfifo(q))
-		for (; i < 4; i++)
-			qspi_writel(q, tmp, q->iobase + QUADSPI_TBDR);
-
-	/* Trigger it */
-	ret = fsl_qspi_runcmd(q, opcode, to, count);
-
-	if (ret == 0)
-		return count;
-
-	return ret;
-}
-
-static void fsl_qspi_set_map_addr(struct fsl_qspi *q)
-{
-	int nor_size = q->nor_size;
-	void __iomem *base = q->iobase;
-
-	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);
-}
-
-/*
- * There are two different ways to read out the data from the flash:
- *  the "IP Command Read" and the "AHB Command Read".
- *
- * The IC guy suggests we use the "AHB Command Read" which is faster
- * then the "IP Command Read". (What's more is that there is a bug in
- * the "IP Command Read" in the Vybrid.)
- *
- * After we set up the registers for the "AHB Command Read", we can use
- * the memcpy to read the data directly. A "missed" access to the buffer
- * causes the controller to clear the buffer, and use the sequence pointed
- * by the QUADSPI_BFGENCR[SEQID] to initiate a read from the flash.
- */
-static void fsl_qspi_init_ahb_read(struct fsl_qspi *q)
-{
-	void __iomem *base = q->iobase;
-	int seqid;
-
-	/* AHB configuration for access buffer 0/1/2 .*/
-	qspi_writel(q, QUADSPI_BUFXCR_INVALID_MSTRID, base + QUADSPI_BUF0CR);
-	qspi_writel(q, QUADSPI_BUFXCR_INVALID_MSTRID, base + QUADSPI_BUF1CR);
-	qspi_writel(q, QUADSPI_BUFXCR_INVALID_MSTRID, base + QUADSPI_BUF2CR);
-	/*
-	 * Set ADATSZ with the maximum AHB buffer size to improve the
-	 * read performance.
-	 */
-	qspi_writel(q, QUADSPI_BUF3CR_ALLMST_MASK |
-			((q->devtype_data->ahb_buf_size / 8)
-			<< QUADSPI_BUF3CR_ADATSZ_SHIFT),
-			base + QUADSPI_BUF3CR);
-
-	/* We only use the buffer3 */
-	qspi_writel(q, 0, base + QUADSPI_BUF0IND);
-	qspi_writel(q, 0, base + QUADSPI_BUF1IND);
-	qspi_writel(q, 0, base + QUADSPI_BUF2IND);
-
-	/* Set the default lut sequence for AHB Read. */
-	seqid = fsl_qspi_get_seqid(q, q->nor[0].read_opcode);
-	qspi_writel(q, seqid << QUADSPI_BFGENCR_SEQID_SHIFT,
-		q->iobase + QUADSPI_BFGENCR);
-}
-
-/* This function was used to prepare and enable QSPI clock */
-static int fsl_qspi_clk_prep_enable(struct fsl_qspi *q)
-{
-	int ret;
-
-	ret = clk_prepare_enable(q->clk_en);
-	if (ret)
-		return ret;
-
-	ret = clk_prepare_enable(q->clk);
-	if (ret) {
-		clk_disable_unprepare(q->clk_en);
-		return ret;
-	}
-
-	if (needs_wakeup_wait_mode(q))
-		pm_qos_add_request(&q->pm_qos_req, PM_QOS_CPU_DMA_LATENCY, 0);
-
-	return 0;
-}
-
-/* This function was used to disable and unprepare QSPI clock */
-static void fsl_qspi_clk_disable_unprep(struct fsl_qspi *q)
-{
-	if (needs_wakeup_wait_mode(q))
-		pm_qos_remove_request(&q->pm_qos_req);
-
-	clk_disable_unprepare(q->clk);
-	clk_disable_unprepare(q->clk_en);
-
-}
-
-/* We use this function to do some basic init for spi_nor_scan(). */
-static int fsl_qspi_nor_setup(struct fsl_qspi *q)
-{
-	void __iomem *base = q->iobase;
-	u32 reg;
-	int ret;
-
-	/* disable and unprepare clock to avoid glitch pass to controller */
-	fsl_qspi_clk_disable_unprep(q);
-
-	/* the default frequency, we will change it in the future. */
-	ret = clk_set_rate(q->clk, 66000000);
-	if (ret)
-		return ret;
-
-	ret = fsl_qspi_clk_prep_enable(q);
-	if (ret)
-		return ret;
-
-	/* Reset the module */
-	qspi_writel(q, QUADSPI_MCR_SWRSTSD_MASK | QUADSPI_MCR_SWRSTHD_MASK,
-		base + QUADSPI_MCR);
-	udelay(1);
-
-	/* Init the LUT table. */
-	fsl_qspi_init_lut(q);
-
-	/* Disable the module */
-	qspi_writel(q, QUADSPI_MCR_MDIS_MASK | QUADSPI_MCR_RESERVED_MASK,
-			base + QUADSPI_MCR);
-
-	reg = qspi_readl(q, base + QUADSPI_SMPR);
-	qspi_writel(q, reg & ~(QUADSPI_SMPR_FSDLY_MASK
-			| QUADSPI_SMPR_FSPHS_MASK
-			| QUADSPI_SMPR_HSENA_MASK
-			| QUADSPI_SMPR_DDRSMP_MASK), base + QUADSPI_SMPR);
-
-	/* Enable the module */
-	qspi_writel(q, QUADSPI_MCR_RESERVED_MASK | QUADSPI_MCR_END_CFG_MASK,
-			base + QUADSPI_MCR);
-
-	/* clear all interrupt status */
-	qspi_writel(q, 0xffffffff, q->iobase + QUADSPI_FR);
-
-	/* enable the interrupt */
-	qspi_writel(q, QUADSPI_RSER_TFIE, q->iobase + QUADSPI_RSER);
-
-	return 0;
-}
-
-static int fsl_qspi_nor_setup_last(struct fsl_qspi *q)
-{
-	unsigned long rate = q->clk_rate;
-	int ret;
-
-	if (needs_4x_clock(q))
-		rate *= 4;
-
-	/* disable and unprepare clock to avoid glitch pass to controller */
-	fsl_qspi_clk_disable_unprep(q);
-
-	ret = clk_set_rate(q->clk, rate);
-	if (ret)
-		return ret;
-
-	ret = fsl_qspi_clk_prep_enable(q);
-	if (ret)
-		return ret;
-
-	/* Init the LUT table again. */
-	fsl_qspi_init_lut(q);
-
-	/* Init for AHB read */
-	fsl_qspi_init_ahb_read(q);
-
-	return 0;
-}
-
-static const struct of_device_id fsl_qspi_dt_ids[] = {
-	{ .compatible = "fsl,vf610-qspi", .data = &vybrid_data, },
-	{ .compatible = "fsl,imx6sx-qspi", .data = &imx6sx_data, },
-	{ .compatible = "fsl,imx7d-qspi", .data = &imx7d_data, },
-	{ .compatible = "fsl,imx6ul-qspi", .data = &imx6ul_data, },
-	{ .compatible = "fsl,ls1021a-qspi", .data = (void *)&ls1021a_data, },
-	{ .compatible = "fsl,ls2080a-qspi", .data = &ls2080a_data, },
-	{ /* sentinel */ }
-};
-MODULE_DEVICE_TABLE(of, fsl_qspi_dt_ids);
-
-static void fsl_qspi_set_base_addr(struct fsl_qspi *q, struct spi_nor *nor)
-{
-	q->chip_base_addr = q->nor_size * (nor - q->nor);
-}
-
-static int fsl_qspi_read_reg(struct spi_nor *nor, u8 opcode, u8 *buf, int len)
-{
-	int ret;
-	struct fsl_qspi *q = nor->priv;
-
-	ret = fsl_qspi_runcmd(q, opcode, 0, len);
-	if (ret)
-		return ret;
-
-	fsl_qspi_read_data(q, len, buf);
-	return 0;
-}
-
-static int fsl_qspi_write_reg(struct spi_nor *nor, u8 opcode, u8 *buf, int len)
-{
-	struct fsl_qspi *q = nor->priv;
-	int ret;
-
-	if (!buf) {
-		ret = fsl_qspi_runcmd(q, opcode, 0, 1);
-		if (ret)
-			return ret;
-
-		if (opcode == SPINOR_OP_CHIP_ERASE)
-			fsl_qspi_invalid(q);
-
-	} else if (len > 0) {
-		ret = fsl_qspi_nor_write(q, nor, opcode, 0,
-					(u32 *)buf, len);
-		if (ret > 0)
-			return 0;
-	} else {
-		dev_err(q->dev, "invalid cmd %d\n", opcode);
-		ret = -EINVAL;
-	}
-
-	return ret;
-}
-
-static ssize_t fsl_qspi_write(struct spi_nor *nor, loff_t to,
-			      size_t len, const u_char *buf)
-{
-	struct fsl_qspi *q = nor->priv;
-	ssize_t ret = fsl_qspi_nor_write(q, nor, nor->program_opcode, to,
-					 (u32 *)buf, len);
-
-	/* invalid the data in the AHB buffer. */
-	fsl_qspi_invalid(q);
-	return ret;
-}
-
-static ssize_t fsl_qspi_read(struct spi_nor *nor, loff_t from,
-			     size_t len, u_char *buf)
-{
-	struct fsl_qspi *q = nor->priv;
-	u8 cmd = nor->read_opcode;
-
-	/* if necessary,ioremap buffer before AHB read, */
-	if (!q->ahb_addr) {
-		q->memmap_offs = q->chip_base_addr + from;
-		q->memmap_len = len > QUADSPI_MIN_IOMAP ? len : QUADSPI_MIN_IOMAP;
-
-		q->ahb_addr = ioremap_nocache(
-				q->memmap_phy + q->memmap_offs,
-				q->memmap_len);
-		if (!q->ahb_addr) {
-			dev_err(q->dev, "ioremap failed\n");
-			return -ENOMEM;
-		}
-	/* ioremap if the data requested is out of range */
-	} else if (q->chip_base_addr + from < q->memmap_offs
-			|| q->chip_base_addr + from + len >
-			q->memmap_offs + q->memmap_len) {
-		iounmap(q->ahb_addr);
-
-		q->memmap_offs = q->chip_base_addr + from;
-		q->memmap_len = len > QUADSPI_MIN_IOMAP ? len : QUADSPI_MIN_IOMAP;
-		q->ahb_addr = ioremap_nocache(
-				q->memmap_phy + q->memmap_offs,
-				q->memmap_len);
-		if (!q->ahb_addr) {
-			dev_err(q->dev, "ioremap failed\n");
-			return -ENOMEM;
-		}
-	}
-
-	dev_dbg(q->dev, "cmd [%x],read from %p, len:%zd\n",
-		cmd, q->ahb_addr + q->chip_base_addr + from - q->memmap_offs,
-		len);
-
-	/* Read out the data directly from the AHB buffer.*/
-	memcpy(buf, q->ahb_addr + q->chip_base_addr + from - q->memmap_offs,
-		len);
-
-	return len;
-}
-
-static int fsl_qspi_erase(struct spi_nor *nor, loff_t offs)
-{
-	struct fsl_qspi *q = nor->priv;
-	int ret;
-
-	dev_dbg(nor->dev, "%dKiB at 0x%08x:0x%08x\n",
-		nor->mtd.erasesize / 1024, q->chip_base_addr, (u32)offs);
-
-	ret = fsl_qspi_runcmd(q, nor->erase_opcode, offs, 0);
-	if (ret)
-		return ret;
-
-	fsl_qspi_invalid(q);
-	return 0;
-}
-
-static int fsl_qspi_prep(struct spi_nor *nor, enum spi_nor_ops ops)
-{
-	struct fsl_qspi *q = nor->priv;
-	int ret;
-
-	mutex_lock(&q->lock);
-
-	ret = fsl_qspi_clk_prep_enable(q);
-	if (ret)
-		goto err_mutex;
-
-	fsl_qspi_set_base_addr(q, nor);
-	return 0;
-
-err_mutex:
-	mutex_unlock(&q->lock);
-	return ret;
-}
-
-static void fsl_qspi_unprep(struct spi_nor *nor, enum spi_nor_ops ops)
-{
-	struct fsl_qspi *q = nor->priv;
-
-	fsl_qspi_clk_disable_unprep(q);
-	mutex_unlock(&q->lock);
-}
-
-static int fsl_qspi_probe(struct platform_device *pdev)
-{
-	const struct spi_nor_hwcaps hwcaps = {
-		.mask = SNOR_HWCAPS_READ_1_1_4 |
-			SNOR_HWCAPS_PP,
-	};
-	struct device_node *np = pdev->dev.of_node;
-	struct device *dev = &pdev->dev;
-	struct fsl_qspi *q;
-	struct resource *res;
-	struct spi_nor *nor;
-	struct mtd_info *mtd;
-	int ret, i = 0;
-
-	q = devm_kzalloc(dev, sizeof(*q), GFP_KERNEL);
-	if (!q)
-		return -ENOMEM;
-
-	q->nor_num = of_get_child_count(dev->of_node);
-	if (!q->nor_num || q->nor_num > FSL_QSPI_MAX_CHIP)
-		return -ENODEV;
-
-	q->dev = dev;
-	q->devtype_data = of_device_get_match_data(dev);
-	if (!q->devtype_data)
-		return -ENODEV;
-	platform_set_drvdata(pdev, q);
-
-	/* find the resources */
-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "QuadSPI");
-	q->iobase = devm_ioremap_resource(dev, res);
-	if (IS_ERR(q->iobase))
-		return PTR_ERR(q->iobase);
-
-	q->big_endian = of_property_read_bool(np, "big-endian");
-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
-					"QuadSPI-memory");
-	if (!devm_request_mem_region(dev, res->start, resource_size(res),
-				     res->name)) {
-		dev_err(dev, "can't request region for resource %pR\n", res);
-		return -EBUSY;
-	}
-
-	q->memmap_phy = res->start;
-
-	/* find the clocks */
-	q->clk_en = devm_clk_get(dev, "qspi_en");
-	if (IS_ERR(q->clk_en))
-		return PTR_ERR(q->clk_en);
-
-	q->clk = devm_clk_get(dev, "qspi");
-	if (IS_ERR(q->clk))
-		return PTR_ERR(q->clk);
-
-	ret = fsl_qspi_clk_prep_enable(q);
-	if (ret) {
-		dev_err(dev, "can not enable the clock\n");
-		goto clk_failed;
-	}
-
-	/* find the irq */
-	ret = platform_get_irq(pdev, 0);
-	if (ret < 0) {
-		dev_err(dev, "failed to get the irq: %d\n", ret);
-		goto irq_failed;
-	}
-
-	ret = devm_request_irq(dev, ret,
-			fsl_qspi_irq_handler, 0, pdev->name, q);
-	if (ret) {
-		dev_err(dev, "failed to request irq: %d\n", ret);
-		goto irq_failed;
-	}
-
-	ret = fsl_qspi_nor_setup(q);
-	if (ret)
-		goto irq_failed;
-
-	if (of_get_property(np, "fsl,qspi-has-second-chip", NULL))
-		q->has_second_chip = true;
-
-	mutex_init(&q->lock);
-
-	/* iterate the subnodes. */
-	for_each_available_child_of_node(dev->of_node, np) {
-		/* skip the holes */
-		if (!q->has_second_chip)
-			i *= 2;
-
-		nor = &q->nor[i];
-		mtd = &nor->mtd;
-
-		nor->dev = dev;
-		spi_nor_set_flash_node(nor, np);
-		nor->priv = q;
-
-		if (q->nor_num > 1 && !mtd->name) {
-			int spiflash_idx;
-
-			ret = of_property_read_u32(np, "reg", &spiflash_idx);
-			if (!ret) {
-				mtd->name = devm_kasprintf(dev, GFP_KERNEL,
-							   "%s-%d",
-							   dev_name(dev),
-							   spiflash_idx);
-				if (!mtd->name) {
-					ret = -ENOMEM;
-					goto mutex_failed;
-				}
-			} else {
-				dev_warn(dev, "reg property is missing\n");
-			}
-		}
-
-		/* fill the hooks */
-		nor->read_reg = fsl_qspi_read_reg;
-		nor->write_reg = fsl_qspi_write_reg;
-		nor->read = fsl_qspi_read;
-		nor->write = fsl_qspi_write;
-		nor->erase = fsl_qspi_erase;
-
-		nor->prepare = fsl_qspi_prep;
-		nor->unprepare = fsl_qspi_unprep;
-
-		ret = of_property_read_u32(np, "spi-max-frequency",
-				&q->clk_rate);
-		if (ret < 0)
-			goto mutex_failed;
-
-		/* set the chip address for READID */
-		fsl_qspi_set_base_addr(q, nor);
-
-		ret = spi_nor_scan(nor, NULL, &hwcaps);
-		if (ret)
-			goto mutex_failed;
-
-		ret = mtd_device_register(mtd, NULL, 0);
-		if (ret)
-			goto mutex_failed;
-
-		/* Set the correct NOR size now. */
-		if (q->nor_size == 0) {
-			q->nor_size = mtd->size;
-
-			/* Map the SPI NOR to accessiable address */
-			fsl_qspi_set_map_addr(q);
-		}
-
-		/*
-		 * The TX FIFO is 64 bytes in the Vybrid, but the Page Program
-		 * may writes 265 bytes per time. The write is working in the
-		 * unit of the TX FIFO, not in the unit of the SPI NOR's page
-		 * size.
-		 *
-		 * So shrink the spi_nor->page_size if it is larger then the
-		 * TX FIFO.
-		 */
-		if (nor->page_size > q->devtype_data->txfifo)
-			nor->page_size = q->devtype_data->txfifo;
-
-		i++;
-	}
-
-	/* finish the rest init. */
-	ret = fsl_qspi_nor_setup_last(q);
-	if (ret)
-		goto last_init_failed;
-
-	fsl_qspi_clk_disable_unprep(q);
-	return 0;
-
-last_init_failed:
-	for (i = 0; i < q->nor_num; i++) {
-		/* skip the holes */
-		if (!q->has_second_chip)
-			i *= 2;
-		mtd_device_unregister(&q->nor[i].mtd);
-	}
-mutex_failed:
-	mutex_destroy(&q->lock);
-irq_failed:
-	fsl_qspi_clk_disable_unprep(q);
-clk_failed:
-	dev_err(dev, "Freescale QuadSPI probe failed\n");
-	return ret;
-}
-
-static int fsl_qspi_remove(struct platform_device *pdev)
-{
-	struct fsl_qspi *q = platform_get_drvdata(pdev);
-	int i;
-
-	for (i = 0; i < q->nor_num; i++) {
-		/* skip the holes */
-		if (!q->has_second_chip)
-			i *= 2;
-		mtd_device_unregister(&q->nor[i].mtd);
-	}
-
-	/* disable the hardware */
-	qspi_writel(q, QUADSPI_MCR_MDIS_MASK, q->iobase + QUADSPI_MCR);
-	qspi_writel(q, 0x0, q->iobase + QUADSPI_RSER);
-
-	mutex_destroy(&q->lock);
-
-	if (q->ahb_addr)
-		iounmap(q->ahb_addr);
-
-	return 0;
-}
-
-static int fsl_qspi_suspend(struct platform_device *pdev, pm_message_t state)
-{
-	return 0;
-}
-
-static int fsl_qspi_resume(struct platform_device *pdev)
-{
-	int ret;
-	struct fsl_qspi *q = platform_get_drvdata(pdev);
-
-	ret = fsl_qspi_clk_prep_enable(q);
-	if (ret)
-		return ret;
-
-	fsl_qspi_nor_setup(q);
-	fsl_qspi_set_map_addr(q);
-	fsl_qspi_nor_setup_last(q);
-
-	fsl_qspi_clk_disable_unprep(q);
-
-	return 0;
-}
-
-static struct platform_driver fsl_qspi_driver = {
-	.driver = {
-		.name	= "fsl-quadspi",
-		.of_match_table = fsl_qspi_dt_ids,
-	},
-	.probe          = fsl_qspi_probe,
-	.remove		= fsl_qspi_remove,
-	.suspend	= fsl_qspi_suspend,
-	.resume		= fsl_qspi_resume,
-};
-module_platform_driver(fsl_qspi_driver);
-
-MODULE_DESCRIPTION("Freescale QuadSPI Controller Driver");
-MODULE_AUTHOR("Freescale Semiconductor Inc.");
-MODULE_LICENSE("GPL v2");
-- 
2.7.4