Merge tag 'cadence-mtd-spi-move' into spi-nor/next

mtd/spi: Move the cadence-quadspi driver to spi-mem

cadence-quadspi has been converted to use the SPIMEM framework,
and moved under drivers/spi/. The series was taken through the
SPI tree. Merge it also in spi-nor/next to avoid conflicts during
the release cycle.

3 files changed, 0 insertions, 1552 deletions

diff --git a/drivers/mtd/spi-nor/controllers/Kconfig b/drivers/mtd/spi-nor/controllers/Kconfig
index d89a5ea9446a..5c0e0ec2e6d1 100644
--- a/drivers/mtd/spi-nor/controllers/Kconfig
+++ b/drivers/mtd/spi-nor/controllers/Kconfig
@@ -9,17 +9,6 @@ config SPI_ASPEED_SMC
 	  and support for the SPI flash memory controller (SPI) for
 	  the host firmware. The implementation only supports SPI NOR.
 
-config SPI_CADENCE_QUADSPI
-	tristate "Cadence Quad SPI controller"
-	depends on OF && (ARM || ARM64 || COMPILE_TEST)
-	help
-	  Enable support for the Cadence Quad SPI Flash controller.
-
-	  Cadence QSPI is a specialized controller for connecting an SPI
-	  Flash over 1/2/4-bit wide bus. Enable this option if you have a
-	  device with a Cadence QSPI controller and want to access the
-	  Flash as an MTD device.
-
 config SPI_HISI_SFC
 	tristate "Hisilicon FMC SPI NOR Flash Controller(SFC)"
 	depends on ARCH_HISI || COMPILE_TEST
diff --git a/drivers/mtd/spi-nor/controllers/Makefile b/drivers/mtd/spi-nor/controllers/Makefile
index 46e6fbe586e3..e7abba491d98 100644
--- a/drivers/mtd/spi-nor/controllers/Makefile
+++ b/drivers/mtd/spi-nor/controllers/Makefile
@@ -1,6 +1,5 @@
 # SPDX-License-Identifier: GPL-2.0
 obj-$(CONFIG_SPI_ASPEED_SMC)	+= aspeed-smc.o
-obj-$(CONFIG_SPI_CADENCE_QUADSPI)	+= cadence-quadspi.o
 obj-$(CONFIG_SPI_HISI_SFC)	+= hisi-sfc.o
 obj-$(CONFIG_SPI_NXP_SPIFI)	+= nxp-spifi.o
 obj-$(CONFIG_SPI_INTEL_SPI)	+= intel-spi.o
diff --git a/drivers/mtd/spi-nor/controllers/cadence-quadspi.c b/drivers/mtd/spi-nor/controllers/cadence-quadspi.c
deleted file mode 100644
index 494dcab4aaaa..000000000000
--- a/drivers/mtd/spi-nor/controllers/cadence-quadspi.c
+++ /dev/null
@@ -1,1540 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Driver for Cadence QSPI Controller
- *
- * Copyright Altera Corporation (C) 2012-2014. All rights reserved.
- */
-#include <linux/clk.h>
-#include <linux/completion.h>
-#include <linux/delay.h>
-#include <linux/dma-mapping.h>
-#include <linux/dmaengine.h>
-#include <linux/err.h>
-#include <linux/errno.h>
-#include <linux/interrupt.h>
-#include <linux/io.h>
-#include <linux/iopoll.h>
-#include <linux/jiffies.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/partitions.h>
-#include <linux/mtd/spi-nor.h>
-#include <linux/of_device.h>
-#include <linux/of.h>
-#include <linux/platform_device.h>
-#include <linux/pm_runtime.h>
-#include <linux/reset.h>
-#include <linux/sched.h>
-#include <linux/spi/spi.h>
-#include <linux/timer.h>
-
-#define CQSPI_NAME			"cadence-qspi"
-#define CQSPI_MAX_CHIPSELECT		16
-
-/* Quirks */
-#define CQSPI_NEEDS_WR_DELAY		BIT(0)
-
-/* Capabilities mask */
-#define CQSPI_BASE_HWCAPS_MASK					\
-	(SNOR_HWCAPS_READ | SNOR_HWCAPS_READ_FAST |		\
-	SNOR_HWCAPS_READ_1_1_2 | SNOR_HWCAPS_READ_1_1_4 |	\
-	SNOR_HWCAPS_PP)
-
-struct cqspi_st;
-
-struct cqspi_flash_pdata {
-	struct spi_nor	nor;
-	struct cqspi_st	*cqspi;
-	u32		clk_rate;
-	u32		read_delay;
-	u32		tshsl_ns;
-	u32		tsd2d_ns;
-	u32		tchsh_ns;
-	u32		tslch_ns;
-	u8		inst_width;
-	u8		addr_width;
-	u8		data_width;
-	u8		cs;
-	bool		registered;
-	bool		use_direct_mode;
-};
-
-struct cqspi_st {
-	struct platform_device	*pdev;
-
-	struct clk		*clk;
-	unsigned int		sclk;
-
-	void __iomem		*iobase;
-	void __iomem		*ahb_base;
-	resource_size_t		ahb_size;
-	struct completion	transfer_complete;
-	struct mutex		bus_mutex;
-
-	struct dma_chan		*rx_chan;
-	struct completion	rx_dma_complete;
-	dma_addr_t		mmap_phys_base;
-
-	int			current_cs;
-	int			current_page_size;
-	int			current_erase_size;
-	int			current_addr_width;
-	unsigned long		master_ref_clk_hz;
-	bool			is_decoded_cs;
-	u32			fifo_depth;
-	u32			fifo_width;
-	bool			rclk_en;
-	u32			trigger_address;
-	u32			wr_delay;
-	struct cqspi_flash_pdata f_pdata[CQSPI_MAX_CHIPSELECT];
-};
-
-struct cqspi_driver_platdata {
-	u32 hwcaps_mask;
-	u8 quirks;
-};
-
-/* Operation timeout value */
-#define CQSPI_TIMEOUT_MS			500
-#define CQSPI_READ_TIMEOUT_MS			10
-
-/* Instruction type */
-#define CQSPI_INST_TYPE_SINGLE			0
-#define CQSPI_INST_TYPE_DUAL			1
-#define CQSPI_INST_TYPE_QUAD			2
-#define CQSPI_INST_TYPE_OCTAL			3
-
-#define CQSPI_DUMMY_CLKS_PER_BYTE		8
-#define CQSPI_DUMMY_BYTES_MAX			4
-#define CQSPI_DUMMY_CLKS_MAX			31
-
-#define CQSPI_STIG_DATA_LEN_MAX			8
-
-/* Register map */
-#define CQSPI_REG_CONFIG			0x00
-#define CQSPI_REG_CONFIG_ENABLE_MASK		BIT(0)
-#define CQSPI_REG_CONFIG_ENB_DIR_ACC_CTRL	BIT(7)
-#define CQSPI_REG_CONFIG_DECODE_MASK		BIT(9)
-#define CQSPI_REG_CONFIG_CHIPSELECT_LSB		10
-#define CQSPI_REG_CONFIG_DMA_MASK		BIT(15)
-#define CQSPI_REG_CONFIG_BAUD_LSB		19
-#define CQSPI_REG_CONFIG_IDLE_LSB		31
-#define CQSPI_REG_CONFIG_CHIPSELECT_MASK	0xF
-#define CQSPI_REG_CONFIG_BAUD_MASK		0xF
-
-#define CQSPI_REG_RD_INSTR			0x04
-#define CQSPI_REG_RD_INSTR_OPCODE_LSB		0
-#define CQSPI_REG_RD_INSTR_TYPE_INSTR_LSB	8
-#define CQSPI_REG_RD_INSTR_TYPE_ADDR_LSB	12
-#define CQSPI_REG_RD_INSTR_TYPE_DATA_LSB	16
-#define CQSPI_REG_RD_INSTR_MODE_EN_LSB		20
-#define CQSPI_REG_RD_INSTR_DUMMY_LSB		24
-#define CQSPI_REG_RD_INSTR_TYPE_INSTR_MASK	0x3
-#define CQSPI_REG_RD_INSTR_TYPE_ADDR_MASK	0x3
-#define CQSPI_REG_RD_INSTR_TYPE_DATA_MASK	0x3
-#define CQSPI_REG_RD_INSTR_DUMMY_MASK		0x1F
-
-#define CQSPI_REG_WR_INSTR			0x08
-#define CQSPI_REG_WR_INSTR_OPCODE_LSB		0
-#define CQSPI_REG_WR_INSTR_TYPE_ADDR_LSB	12
-#define CQSPI_REG_WR_INSTR_TYPE_DATA_LSB	16
-
-#define CQSPI_REG_DELAY				0x0C
-#define CQSPI_REG_DELAY_TSLCH_LSB		0
-#define CQSPI_REG_DELAY_TCHSH_LSB		8
-#define CQSPI_REG_DELAY_TSD2D_LSB		16
-#define CQSPI_REG_DELAY_TSHSL_LSB		24
-#define CQSPI_REG_DELAY_TSLCH_MASK		0xFF
-#define CQSPI_REG_DELAY_TCHSH_MASK		0xFF
-#define CQSPI_REG_DELAY_TSD2D_MASK		0xFF
-#define CQSPI_REG_DELAY_TSHSL_MASK		0xFF
-
-#define CQSPI_REG_READCAPTURE			0x10
-#define CQSPI_REG_READCAPTURE_BYPASS_LSB	0
-#define CQSPI_REG_READCAPTURE_DELAY_LSB		1
-#define CQSPI_REG_READCAPTURE_DELAY_MASK	0xF
-
-#define CQSPI_REG_SIZE				0x14
-#define CQSPI_REG_SIZE_ADDRESS_LSB		0
-#define CQSPI_REG_SIZE_PAGE_LSB			4
-#define CQSPI_REG_SIZE_BLOCK_LSB		16
-#define CQSPI_REG_SIZE_ADDRESS_MASK		0xF
-#define CQSPI_REG_SIZE_PAGE_MASK		0xFFF
-#define CQSPI_REG_SIZE_BLOCK_MASK		0x3F
-
-#define CQSPI_REG_SRAMPARTITION			0x18
-#define CQSPI_REG_INDIRECTTRIGGER		0x1C
-
-#define CQSPI_REG_DMA				0x20
-#define CQSPI_REG_DMA_SINGLE_LSB		0
-#define CQSPI_REG_DMA_BURST_LSB			8
-#define CQSPI_REG_DMA_SINGLE_MASK		0xFF
-#define CQSPI_REG_DMA_BURST_MASK		0xFF
-
-#define CQSPI_REG_REMAP				0x24
-#define CQSPI_REG_MODE_BIT			0x28
-
-#define CQSPI_REG_SDRAMLEVEL			0x2C
-#define CQSPI_REG_SDRAMLEVEL_RD_LSB		0
-#define CQSPI_REG_SDRAMLEVEL_WR_LSB		16
-#define CQSPI_REG_SDRAMLEVEL_RD_MASK		0xFFFF
-#define CQSPI_REG_SDRAMLEVEL_WR_MASK		0xFFFF
-
-#define CQSPI_REG_IRQSTATUS			0x40
-#define CQSPI_REG_IRQMASK			0x44
-
-#define CQSPI_REG_INDIRECTRD			0x60
-#define CQSPI_REG_INDIRECTRD_START_MASK		BIT(0)
-#define CQSPI_REG_INDIRECTRD_CANCEL_MASK	BIT(1)
-#define CQSPI_REG_INDIRECTRD_DONE_MASK		BIT(5)
-
-#define CQSPI_REG_INDIRECTRDWATERMARK		0x64
-#define CQSPI_REG_INDIRECTRDSTARTADDR		0x68
-#define CQSPI_REG_INDIRECTRDBYTES		0x6C
-
-#define CQSPI_REG_CMDCTRL			0x90
-#define CQSPI_REG_CMDCTRL_EXECUTE_MASK		BIT(0)
-#define CQSPI_REG_CMDCTRL_INPROGRESS_MASK	BIT(1)
-#define CQSPI_REG_CMDCTRL_WR_BYTES_LSB		12
-#define CQSPI_REG_CMDCTRL_WR_EN_LSB		15
-#define CQSPI_REG_CMDCTRL_ADD_BYTES_LSB		16
-#define CQSPI_REG_CMDCTRL_ADDR_EN_LSB		19
-#define CQSPI_REG_CMDCTRL_RD_BYTES_LSB		20
-#define CQSPI_REG_CMDCTRL_RD_EN_LSB		23
-#define CQSPI_REG_CMDCTRL_OPCODE_LSB		24
-#define CQSPI_REG_CMDCTRL_WR_BYTES_MASK		0x7
-#define CQSPI_REG_CMDCTRL_ADD_BYTES_MASK	0x3
-#define CQSPI_REG_CMDCTRL_RD_BYTES_MASK		0x7
-
-#define CQSPI_REG_INDIRECTWR			0x70
-#define CQSPI_REG_INDIRECTWR_START_MASK		BIT(0)
-#define CQSPI_REG_INDIRECTWR_CANCEL_MASK	BIT(1)
-#define CQSPI_REG_INDIRECTWR_DONE_MASK		BIT(5)
-
-#define CQSPI_REG_INDIRECTWRWATERMARK		0x74
-#define CQSPI_REG_INDIRECTWRSTARTADDR		0x78
-#define CQSPI_REG_INDIRECTWRBYTES		0x7C
-
-#define CQSPI_REG_CMDADDRESS			0x94
-#define CQSPI_REG_CMDREADDATALOWER		0xA0
-#define CQSPI_REG_CMDREADDATAUPPER		0xA4
-#define CQSPI_REG_CMDWRITEDATALOWER		0xA8
-#define CQSPI_REG_CMDWRITEDATAUPPER		0xAC
-
-/* Interrupt status bits */
-#define CQSPI_REG_IRQ_MODE_ERR			BIT(0)
-#define CQSPI_REG_IRQ_UNDERFLOW			BIT(1)
-#define CQSPI_REG_IRQ_IND_COMP			BIT(2)
-#define CQSPI_REG_IRQ_IND_RD_REJECT		BIT(3)
-#define CQSPI_REG_IRQ_WR_PROTECTED_ERR		BIT(4)
-#define CQSPI_REG_IRQ_ILLEGAL_AHB_ERR		BIT(5)
-#define CQSPI_REG_IRQ_WATERMARK			BIT(6)
-#define CQSPI_REG_IRQ_IND_SRAM_FULL		BIT(12)
-
-#define CQSPI_IRQ_MASK_RD		(CQSPI_REG_IRQ_WATERMARK	| \
-					 CQSPI_REG_IRQ_IND_SRAM_FULL	| \
-					 CQSPI_REG_IRQ_IND_COMP)
-
-#define CQSPI_IRQ_MASK_WR		(CQSPI_REG_IRQ_IND_COMP		| \
-					 CQSPI_REG_IRQ_WATERMARK	| \
-					 CQSPI_REG_IRQ_UNDERFLOW)
-
-#define CQSPI_IRQ_STATUS_MASK		0x1FFFF
-
-static int cqspi_wait_for_bit(void __iomem *reg, const u32 mask, bool clr)
-{
-	u32 val;
-
-	return readl_relaxed_poll_timeout(reg, val,
-					  (((clr ? ~val : val) & mask) == mask),
-					  10, CQSPI_TIMEOUT_MS * 1000);
-}
-
-static bool cqspi_is_idle(struct cqspi_st *cqspi)
-{
-	u32 reg = readl(cqspi->iobase + CQSPI_REG_CONFIG);
-
-	return reg & (1 << CQSPI_REG_CONFIG_IDLE_LSB);
-}
-
-static u32 cqspi_get_rd_sram_level(struct cqspi_st *cqspi)
-{
-	u32 reg = readl(cqspi->iobase + CQSPI_REG_SDRAMLEVEL);
-
-	reg >>= CQSPI_REG_SDRAMLEVEL_RD_LSB;
-	return reg & CQSPI_REG_SDRAMLEVEL_RD_MASK;
-}
-
-static irqreturn_t cqspi_irq_handler(int this_irq, void *dev)
-{
-	struct cqspi_st *cqspi = dev;
-	unsigned int irq_status;
-
-	/* Read interrupt status */
-	irq_status = readl(cqspi->iobase + CQSPI_REG_IRQSTATUS);
-
-	/* Clear interrupt */
-	writel(irq_status, cqspi->iobase + CQSPI_REG_IRQSTATUS);
-
-	irq_status &= CQSPI_IRQ_MASK_RD | CQSPI_IRQ_MASK_WR;
-
-	if (irq_status)
-		complete(&cqspi->transfer_complete);
-
-	return IRQ_HANDLED;
-}
-
-static unsigned int cqspi_calc_rdreg(struct spi_nor *nor)
-{
-	struct cqspi_flash_pdata *f_pdata = nor->priv;
-	u32 rdreg = 0;
-
-	rdreg |= f_pdata->inst_width << CQSPI_REG_RD_INSTR_TYPE_INSTR_LSB;
-	rdreg |= f_pdata->addr_width << CQSPI_REG_RD_INSTR_TYPE_ADDR_LSB;
-	rdreg |= f_pdata->data_width << CQSPI_REG_RD_INSTR_TYPE_DATA_LSB;
-
-	return rdreg;
-}
-
-static int cqspi_wait_idle(struct cqspi_st *cqspi)
-{
-	const unsigned int poll_idle_retry = 3;
-	unsigned int count = 0;
-	unsigned long timeout;
-
-	timeout = jiffies + msecs_to_jiffies(CQSPI_TIMEOUT_MS);
-	while (1) {
-		/*
-		 * Read few times in succession to ensure the controller
-		 * is indeed idle, that is, the bit does not transition
-		 * low again.
-		 */
-		if (cqspi_is_idle(cqspi))
-			count++;
-		else
-			count = 0;
-
-		if (count >= poll_idle_retry)
-			return 0;
-
-		if (time_after(jiffies, timeout)) {
-			/* Timeout, in busy mode. */
-			dev_err(&cqspi->pdev->dev,
-				"QSPI is still busy after %dms timeout.\n",
-				CQSPI_TIMEOUT_MS);
-			return -ETIMEDOUT;
-		}
-
-		cpu_relax();
-	}
-}
-
-static int cqspi_exec_flash_cmd(struct cqspi_st *cqspi, unsigned int reg)
-{
-	void __iomem *reg_base = cqspi->iobase;
-	int ret;
-
-	/* Write the CMDCTRL without start execution. */
-	writel(reg, reg_base + CQSPI_REG_CMDCTRL);
-	/* Start execute */
-	reg |= CQSPI_REG_CMDCTRL_EXECUTE_MASK;
-	writel(reg, reg_base + CQSPI_REG_CMDCTRL);
-
-	/* Polling for completion. */
-	ret = cqspi_wait_for_bit(reg_base + CQSPI_REG_CMDCTRL,
-				 CQSPI_REG_CMDCTRL_INPROGRESS_MASK, 1);
-	if (ret) {
-		dev_err(&cqspi->pdev->dev,
-			"Flash command execution timed out.\n");
-		return ret;
-	}
-
-	/* Polling QSPI idle status. */
-	return cqspi_wait_idle(cqspi);
-}
-
-static int cqspi_command_read(struct spi_nor *nor, u8 opcode,
-			      u8 *rxbuf, size_t n_rx)
-{
-	struct cqspi_flash_pdata *f_pdata = nor->priv;
-	struct cqspi_st *cqspi = f_pdata->cqspi;
-	void __iomem *reg_base = cqspi->iobase;
-	unsigned int rdreg;
-	unsigned int reg;
-	size_t read_len;
-	int status;
-
-	if (!n_rx || n_rx > CQSPI_STIG_DATA_LEN_MAX || !rxbuf) {
-		dev_err(nor->dev,
-			"Invalid input argument, len %zu rxbuf 0x%p\n",
-			n_rx, rxbuf);
-		return -EINVAL;
-	}
-
-	reg = opcode << CQSPI_REG_CMDCTRL_OPCODE_LSB;
-
-	rdreg = cqspi_calc_rdreg(nor);
-	writel(rdreg, reg_base + CQSPI_REG_RD_INSTR);
-
-	reg |= (0x1 << CQSPI_REG_CMDCTRL_RD_EN_LSB);
-
-	/* 0 means 1 byte. */
-	reg |= (((n_rx - 1) & CQSPI_REG_CMDCTRL_RD_BYTES_MASK)
-		<< CQSPI_REG_CMDCTRL_RD_BYTES_LSB);
-	status = cqspi_exec_flash_cmd(cqspi, reg);
-	if (status)
-		return status;
-
-	reg = readl(reg_base + CQSPI_REG_CMDREADDATALOWER);
-
-	/* Put the read value into rx_buf */
-	read_len = (n_rx > 4) ? 4 : n_rx;
-	memcpy(rxbuf, &reg, read_len);
-	rxbuf += read_len;
-
-	if (n_rx > 4) {
-		reg = readl(reg_base + CQSPI_REG_CMDREADDATAUPPER);
-
-		read_len = n_rx - read_len;
-		memcpy(rxbuf, &reg, read_len);
-	}
-
-	return 0;
-}
-
-static int cqspi_command_write(struct spi_nor *nor, const u8 opcode,
-			       const u8 *txbuf, size_t n_tx)
-{
-	struct cqspi_flash_pdata *f_pdata = nor->priv;
-	struct cqspi_st *cqspi = f_pdata->cqspi;
-	void __iomem *reg_base = cqspi->iobase;
-	unsigned int reg;
-	unsigned int data;
-	size_t write_len;
-	int ret;
-
-	if (n_tx > CQSPI_STIG_DATA_LEN_MAX || (n_tx && !txbuf)) {
-		dev_err(nor->dev,
-			"Invalid input argument, cmdlen %zu txbuf 0x%p\n",
-			n_tx, txbuf);
-		return -EINVAL;
-	}
-
-	reg = opcode << CQSPI_REG_CMDCTRL_OPCODE_LSB;
-	if (n_tx) {
-		reg |= (0x1 << CQSPI_REG_CMDCTRL_WR_EN_LSB);
-		reg |= ((n_tx - 1) & CQSPI_REG_CMDCTRL_WR_BYTES_MASK)
-			<< CQSPI_REG_CMDCTRL_WR_BYTES_LSB;
-		data = 0;
-		write_len = (n_tx > 4) ? 4 : n_tx;
-		memcpy(&data, txbuf, write_len);
-		txbuf += write_len;
-		writel(data, reg_base + CQSPI_REG_CMDWRITEDATALOWER);
-
-		if (n_tx > 4) {
-			data = 0;
-			write_len = n_tx - 4;
-			memcpy(&data, txbuf, write_len);
-			writel(data, reg_base + CQSPI_REG_CMDWRITEDATAUPPER);
-		}
-	}
-	ret = cqspi_exec_flash_cmd(cqspi, reg);
-	return ret;
-}
-
-static int cqspi_command_write_addr(struct spi_nor *nor,
-				    const u8 opcode, const unsigned int addr)
-{
-	struct cqspi_flash_pdata *f_pdata = nor->priv;
-	struct cqspi_st *cqspi = f_pdata->cqspi;
-	void __iomem *reg_base = cqspi->iobase;
-	unsigned int reg;
-
-	reg = opcode << CQSPI_REG_CMDCTRL_OPCODE_LSB;
-	reg |= (0x1 << CQSPI_REG_CMDCTRL_ADDR_EN_LSB);
-	reg |= ((nor->addr_width - 1) & CQSPI_REG_CMDCTRL_ADD_BYTES_MASK)
-		<< CQSPI_REG_CMDCTRL_ADD_BYTES_LSB;
-
-	writel(addr, reg_base + CQSPI_REG_CMDADDRESS);
-
-	return cqspi_exec_flash_cmd(cqspi, reg);
-}
-
-static int cqspi_read_setup(struct spi_nor *nor)
-{
-	struct cqspi_flash_pdata *f_pdata = nor->priv;
-	struct cqspi_st *cqspi = f_pdata->cqspi;
-	void __iomem *reg_base = cqspi->iobase;
-	unsigned int dummy_clk = 0;
-	unsigned int reg;
-
-	reg = nor->read_opcode << CQSPI_REG_RD_INSTR_OPCODE_LSB;
-	reg |= cqspi_calc_rdreg(nor);
-
-	/* Setup dummy clock cycles */
-	dummy_clk = nor->read_dummy;
-	if (dummy_clk > CQSPI_DUMMY_CLKS_MAX)
-		dummy_clk = CQSPI_DUMMY_CLKS_MAX;
-
-	if (dummy_clk / 8) {
-		reg |= (1 << CQSPI_REG_RD_INSTR_MODE_EN_LSB);
-		/* Set mode bits high to ensure chip doesn't enter XIP */
-		writel(0xFF, reg_base + CQSPI_REG_MODE_BIT);
-
-		/* Need to subtract the mode byte (8 clocks). */
-		if (f_pdata->inst_width != CQSPI_INST_TYPE_QUAD)
-			dummy_clk -= 8;
-
-		if (dummy_clk)
-			reg |= (dummy_clk & CQSPI_REG_RD_INSTR_DUMMY_MASK)
-			       << CQSPI_REG_RD_INSTR_DUMMY_LSB;
-	}
-
-	writel(reg, reg_base + CQSPI_REG_RD_INSTR);
-
-	/* Set address width */
-	reg = readl(reg_base + CQSPI_REG_SIZE);
-	reg &= ~CQSPI_REG_SIZE_ADDRESS_MASK;
-	reg |= (nor->addr_width - 1);
-	writel(reg, reg_base + CQSPI_REG_SIZE);
-	return 0;
-}
-
-static int cqspi_indirect_read_execute(struct spi_nor *nor, u8 *rxbuf,
-				       loff_t from_addr, const size_t n_rx)
-{
-	struct cqspi_flash_pdata *f_pdata = nor->priv;
-	struct cqspi_st *cqspi = f_pdata->cqspi;
-	void __iomem *reg_base = cqspi->iobase;
-	void __iomem *ahb_base = cqspi->ahb_base;
-	unsigned int remaining = n_rx;
-	unsigned int mod_bytes = n_rx % 4;
-	unsigned int bytes_to_read = 0;
-	u8 *rxbuf_end = rxbuf + n_rx;
-	int ret = 0;
-
-	writel(from_addr, reg_base + CQSPI_REG_INDIRECTRDSTARTADDR);
-	writel(remaining, reg_base + CQSPI_REG_INDIRECTRDBYTES);
-
-	/* Clear all interrupts. */
-	writel(CQSPI_IRQ_STATUS_MASK, reg_base + CQSPI_REG_IRQSTATUS);
-
-	writel(CQSPI_IRQ_MASK_RD, reg_base + CQSPI_REG_IRQMASK);
-
-	reinit_completion(&cqspi->transfer_complete);
-	writel(CQSPI_REG_INDIRECTRD_START_MASK,
-	       reg_base + CQSPI_REG_INDIRECTRD);
-
-	while (remaining > 0) {
-		if (!wait_for_completion_timeout(&cqspi->transfer_complete,
-				msecs_to_jiffies(CQSPI_READ_TIMEOUT_MS)))
-			ret = -ETIMEDOUT;
-
-		bytes_to_read = cqspi_get_rd_sram_level(cqspi);
-
-		if (ret && bytes_to_read == 0) {
-			dev_err(nor->dev, "Indirect read timeout, no bytes\n");
-			goto failrd;
-		}
-
-		while (bytes_to_read != 0) {
-			unsigned int word_remain = round_down(remaining, 4);
-
-			bytes_to_read *= cqspi->fifo_width;
-			bytes_to_read = bytes_to_read > remaining ?
-					remaining : bytes_to_read;
-			bytes_to_read = round_down(bytes_to_read, 4);
-			/* Read 4 byte word chunks then single bytes */
-			if (bytes_to_read) {
-				ioread32_rep(ahb_base, rxbuf,
-					     (bytes_to_read / 4));
-			} else if (!word_remain && mod_bytes) {
-				unsigned int temp = ioread32(ahb_base);
-
-				bytes_to_read = mod_bytes;
-				memcpy(rxbuf, &temp, min((unsigned int)
-							 (rxbuf_end - rxbuf),
-							 bytes_to_read));
-			}
-			rxbuf += bytes_to_read;
-			remaining -= bytes_to_read;
-			bytes_to_read = cqspi_get_rd_sram_level(cqspi);
-		}
-
-		if (remaining > 0)
-			reinit_completion(&cqspi->transfer_complete);
-	}
-
-	/* Check indirect done status */
-	ret = cqspi_wait_for_bit(reg_base + CQSPI_REG_INDIRECTRD,
-				 CQSPI_REG_INDIRECTRD_DONE_MASK, 0);
-	if (ret) {
-		dev_err(nor->dev,
-			"Indirect read completion error (%i)\n", ret);
-		goto failrd;
-	}
-
-	/* Disable interrupt */
-	writel(0, reg_base + CQSPI_REG_IRQMASK);
-
-	/* Clear indirect completion status */
-	writel(CQSPI_REG_INDIRECTRD_DONE_MASK, reg_base + CQSPI_REG_INDIRECTRD);
-
-	return 0;
-
-failrd:
-	/* Disable interrupt */
-	writel(0, reg_base + CQSPI_REG_IRQMASK);
-
-	/* Cancel the indirect read */
-	writel(CQSPI_REG_INDIRECTWR_CANCEL_MASK,
-	       reg_base + CQSPI_REG_INDIRECTRD);
-	return ret;
-}
-
-static int cqspi_write_setup(struct spi_nor *nor)
-{
-	unsigned int reg;
-	struct cqspi_flash_pdata *f_pdata = nor->priv;
-	struct cqspi_st *cqspi = f_pdata->cqspi;
-	void __iomem *reg_base = cqspi->iobase;
-
-	/* Set opcode. */
-	reg = nor->program_opcode << CQSPI_REG_WR_INSTR_OPCODE_LSB;
-	writel(reg, reg_base + CQSPI_REG_WR_INSTR);
-	reg = cqspi_calc_rdreg(nor);
-	writel(reg, reg_base + CQSPI_REG_RD_INSTR);
-
-	reg = readl(reg_base + CQSPI_REG_SIZE);
-	reg &= ~CQSPI_REG_SIZE_ADDRESS_MASK;
-	reg |= (nor->addr_width - 1);
-	writel(reg, reg_base + CQSPI_REG_SIZE);
-	return 0;
-}
-
-static int cqspi_indirect_write_execute(struct spi_nor *nor, loff_t to_addr,
-					const u8 *txbuf, const size_t n_tx)
-{
-	const unsigned int page_size = nor->page_size;
-	struct cqspi_flash_pdata *f_pdata = nor->priv;
-	struct cqspi_st *cqspi = f_pdata->cqspi;
-	void __iomem *reg_base = cqspi->iobase;
-	unsigned int remaining = n_tx;
-	unsigned int write_bytes;
-	int ret;
-
-	writel(to_addr, reg_base + CQSPI_REG_INDIRECTWRSTARTADDR);
-	writel(remaining, reg_base + CQSPI_REG_INDIRECTWRBYTES);
-
-	/* Clear all interrupts. */
-	writel(CQSPI_IRQ_STATUS_MASK, reg_base + CQSPI_REG_IRQSTATUS);
-
-	writel(CQSPI_IRQ_MASK_WR, reg_base + CQSPI_REG_IRQMASK);
-
-	reinit_completion(&cqspi->transfer_complete);
-	writel(CQSPI_REG_INDIRECTWR_START_MASK,
-	       reg_base + CQSPI_REG_INDIRECTWR);
-	/*
-	 * As per 66AK2G02 TRM SPRUHY8F section 11.15.5.3 Indirect Access
-	 * Controller programming sequence, couple of cycles of
-	 * QSPI_REF_CLK delay is required for the above bit to
-	 * be internally synchronized by the QSPI module. Provide 5
-	 * cycles of delay.
-	 */
-	if (cqspi->wr_delay)
-		ndelay(cqspi->wr_delay);
-
-	while (remaining > 0) {
-		size_t write_words, mod_bytes;
-
-		write_bytes = remaining > page_size ? page_size : remaining;
-		write_words = write_bytes / 4;
-		mod_bytes = write_bytes % 4;
-		/* Write 4 bytes at a time then single bytes. */
-		if (write_words) {
-			iowrite32_rep(cqspi->ahb_base, txbuf, write_words);
-			txbuf += (write_words * 4);
-		}
-		if (mod_bytes) {
-			unsigned int temp = 0xFFFFFFFF;
-
-			memcpy(&temp, txbuf, mod_bytes);
-			iowrite32(temp, cqspi->ahb_base);
-			txbuf += mod_bytes;
-		}
-
-		if (!wait_for_completion_timeout(&cqspi->transfer_complete,
-					msecs_to_jiffies(CQSPI_TIMEOUT_MS))) {
-			dev_err(nor->dev, "Indirect write timeout\n");
-			ret = -ETIMEDOUT;
-			goto failwr;
-		}
-
-		remaining -= write_bytes;
-
-		if (remaining > 0)
-			reinit_completion(&cqspi->transfer_complete);
-	}
-
-	/* Check indirect done status */
-	ret = cqspi_wait_for_bit(reg_base + CQSPI_REG_INDIRECTWR,
-				 CQSPI_REG_INDIRECTWR_DONE_MASK, 0);
-	if (ret) {
-		dev_err(nor->dev,
-			"Indirect write completion error (%i)\n", ret);
-		goto failwr;
-	}
-
-	/* Disable interrupt. */
-	writel(0, reg_base + CQSPI_REG_IRQMASK);
-
-	/* Clear indirect completion status */
-	writel(CQSPI_REG_INDIRECTWR_DONE_MASK, reg_base + CQSPI_REG_INDIRECTWR);
-
-	cqspi_wait_idle(cqspi);
-
-	return 0;
-
-failwr:
-	/* Disable interrupt. */
-	writel(0, reg_base + CQSPI_REG_IRQMASK);
-
-	/* Cancel the indirect write */
-	writel(CQSPI_REG_INDIRECTWR_CANCEL_MASK,
-	       reg_base + CQSPI_REG_INDIRECTWR);
-	return ret;
-}
-
-static void cqspi_chipselect(struct spi_nor *nor)
-{
-	struct cqspi_flash_pdata *f_pdata = nor->priv;
-	struct cqspi_st *cqspi = f_pdata->cqspi;
-	void __iomem *reg_base = cqspi->iobase;
-	unsigned int chip_select = f_pdata->cs;
-	unsigned int reg;
-
-	reg = readl(reg_base + CQSPI_REG_CONFIG);
-	if (cqspi->is_decoded_cs) {
-		reg |= CQSPI_REG_CONFIG_DECODE_MASK;
-	} else {
-		reg &= ~CQSPI_REG_CONFIG_DECODE_MASK;
-
-		/* Convert CS if without decoder.
-		 * CS0 to 4b'1110
-		 * CS1 to 4b'1101
-		 * CS2 to 4b'1011
-		 * CS3 to 4b'0111
-		 */
-		chip_select = 0xF & ~(1 << chip_select);
-	}
-
-	reg &= ~(CQSPI_REG_CONFIG_CHIPSELECT_MASK
-		 << CQSPI_REG_CONFIG_CHIPSELECT_LSB);
-	reg |= (chip_select & CQSPI_REG_CONFIG_CHIPSELECT_MASK)
-	    << CQSPI_REG_CONFIG_CHIPSELECT_LSB;
-	writel(reg, reg_base + CQSPI_REG_CONFIG);
-}
-
-static void cqspi_configure_cs_and_sizes(struct spi_nor *nor)
-{
-	struct cqspi_flash_pdata *f_pdata = nor->priv;
-	struct cqspi_st *cqspi = f_pdata->cqspi;
-	void __iomem *iobase = cqspi->iobase;
-	unsigned int reg;
-
-	/* configure page size and block size. */
-	reg = readl(iobase + CQSPI_REG_SIZE);
-	reg &= ~(CQSPI_REG_SIZE_PAGE_MASK << CQSPI_REG_SIZE_PAGE_LSB);
-	reg &= ~(CQSPI_REG_SIZE_BLOCK_MASK << CQSPI_REG_SIZE_BLOCK_LSB);
-	reg &= ~CQSPI_REG_SIZE_ADDRESS_MASK;
-	reg |= (nor->page_size << CQSPI_REG_SIZE_PAGE_LSB);
-	reg |= (ilog2(nor->mtd.erasesize) << CQSPI_REG_SIZE_BLOCK_LSB);
-	reg |= (nor->addr_width - 1);
-	writel(reg, iobase + CQSPI_REG_SIZE);
-
-	/* configure the chip select */
-	cqspi_chipselect(nor);
-
-	/* Store the new configuration of the controller */
-	cqspi->current_page_size = nor->page_size;
-	cqspi->current_erase_size = nor->mtd.erasesize;
-	cqspi->current_addr_width = nor->addr_width;
-}
-
-static unsigned int calculate_ticks_for_ns(const unsigned int ref_clk_hz,
-					   const unsigned int ns_val)
-{
-	unsigned int ticks;
-
-	ticks = ref_clk_hz / 1000;	/* kHz */
-	ticks = DIV_ROUND_UP(ticks * ns_val, 1000000);
-
-	return ticks;
-}
-
-static void cqspi_delay(struct spi_nor *nor)
-{
-	struct cqspi_flash_pdata *f_pdata = nor->priv;
-	struct cqspi_st *cqspi = f_pdata->cqspi;
-	void __iomem *iobase = cqspi->iobase;
-	const unsigned int ref_clk_hz = cqspi->master_ref_clk_hz;
-	unsigned int tshsl, tchsh, tslch, tsd2d;
-	unsigned int reg;
-	unsigned int tsclk;
-
-	/* calculate the number of ref ticks for one sclk tick */
-	tsclk = DIV_ROUND_UP(ref_clk_hz, cqspi->sclk);
-
-	tshsl = calculate_ticks_for_ns(ref_clk_hz, f_pdata->tshsl_ns);
-	/* this particular value must be at least one sclk */
-	if (tshsl < tsclk)
-		tshsl = tsclk;
-
-	tchsh = calculate_ticks_for_ns(ref_clk_hz, f_pdata->tchsh_ns);
-	tslch = calculate_ticks_for_ns(ref_clk_hz, f_pdata->tslch_ns);
-	tsd2d = calculate_ticks_for_ns(ref_clk_hz, f_pdata->tsd2d_ns);
-
-	reg = (tshsl & CQSPI_REG_DELAY_TSHSL_MASK)
-	       << CQSPI_REG_DELAY_TSHSL_LSB;
-	reg |= (tchsh & CQSPI_REG_DELAY_TCHSH_MASK)
-		<< CQSPI_REG_DELAY_TCHSH_LSB;
-	reg |= (tslch & CQSPI_REG_DELAY_TSLCH_MASK)
-		<< CQSPI_REG_DELAY_TSLCH_LSB;
-	reg |= (tsd2d & CQSPI_REG_DELAY_TSD2D_MASK)
-		<< CQSPI_REG_DELAY_TSD2D_LSB;
-	writel(reg, iobase + CQSPI_REG_DELAY);
-}
-
-static void cqspi_config_baudrate_div(struct cqspi_st *cqspi)
-{
-	const unsigned int ref_clk_hz = cqspi->master_ref_clk_hz;
-	void __iomem *reg_base = cqspi->iobase;
-	u32 reg, div;
-
-	/* Recalculate the baudrate divisor based on QSPI specification. */
-	div = DIV_ROUND_UP(ref_clk_hz, 2 * cqspi->sclk) - 1;
-
-	reg = readl(reg_base + CQSPI_REG_CONFIG);
-	reg &= ~(CQSPI_REG_CONFIG_BAUD_MASK << CQSPI_REG_CONFIG_BAUD_LSB);
-	reg |= (div & CQSPI_REG_CONFIG_BAUD_MASK) << CQSPI_REG_CONFIG_BAUD_LSB;
-	writel(reg, reg_base + CQSPI_REG_CONFIG);
-}
-
-static void cqspi_readdata_capture(struct cqspi_st *cqspi,
-				   const bool bypass,
-				   const unsigned int delay)
-{
-	void __iomem *reg_base = cqspi->iobase;
-	unsigned int reg;
-
-	reg = readl(reg_base + CQSPI_REG_READCAPTURE);
-
-	if (bypass)
-		reg |= (1 << CQSPI_REG_READCAPTURE_BYPASS_LSB);
-	else
-		reg &= ~(1 << CQSPI_REG_READCAPTURE_BYPASS_LSB);
-
-	reg &= ~(CQSPI_REG_READCAPTURE_DELAY_MASK
-		 << CQSPI_REG_READCAPTURE_DELAY_LSB);
-
-	reg |= (delay & CQSPI_REG_READCAPTURE_DELAY_MASK)
-		<< CQSPI_REG_READCAPTURE_DELAY_LSB;
-
-	writel(reg, reg_base + CQSPI_REG_READCAPTURE);
-}
-
-static void cqspi_controller_enable(struct cqspi_st *cqspi, bool enable)
-{
-	void __iomem *reg_base = cqspi->iobase;
-	unsigned int reg;
-
-	reg = readl(reg_base + CQSPI_REG_CONFIG);
-
-	if (enable)
-		reg |= CQSPI_REG_CONFIG_ENABLE_MASK;
-	else
-		reg &= ~CQSPI_REG_CONFIG_ENABLE_MASK;
-
-	writel(reg, reg_base + CQSPI_REG_CONFIG);
-}
-
-static void cqspi_configure(struct spi_nor *nor)
-{
-	struct cqspi_flash_pdata *f_pdata = nor->priv;
-	struct cqspi_st *cqspi = f_pdata->cqspi;
-	const unsigned int sclk = f_pdata->clk_rate;
-	int switch_cs = (cqspi->current_cs != f_pdata->cs);
-	int switch_ck = (cqspi->sclk != sclk);
-
-	if ((cqspi->current_page_size != nor->page_size) ||
-	    (cqspi->current_erase_size != nor->mtd.erasesize) ||
-	    (cqspi->current_addr_width != nor->addr_width))
-		switch_cs = 1;
-
-	if (switch_cs || switch_ck)
-		cqspi_controller_enable(cqspi, 0);
-
-	/* Switch chip select. */
-	if (switch_cs) {
-		cqspi->current_cs = f_pdata->cs;
-		cqspi_configure_cs_and_sizes(nor);
-	}
-
-	/* Setup baudrate divisor and delays */
-	if (switch_ck) {
-		cqspi->sclk = sclk;
-		cqspi_config_baudrate_div(cqspi);
-		cqspi_delay(nor);
-		cqspi_readdata_capture(cqspi, !cqspi->rclk_en,
-				       f_pdata->read_delay);
-	}
-
-	if (switch_cs || switch_ck)
-		cqspi_controller_enable(cqspi, 1);
-}
-
-static int cqspi_set_protocol(struct spi_nor *nor, const int read)
-{
-	struct cqspi_flash_pdata *f_pdata = nor->priv;
-
-	f_pdata->inst_width = CQSPI_INST_TYPE_SINGLE;
-	f_pdata->addr_width = CQSPI_INST_TYPE_SINGLE;
-	f_pdata->data_width = CQSPI_INST_TYPE_SINGLE;
-
-	if (read) {
-		switch (nor->read_proto) {
-		case SNOR_PROTO_1_1_1:
-			f_pdata->data_width = CQSPI_INST_TYPE_SINGLE;
-			break;
-		case SNOR_PROTO_1_1_2:
-			f_pdata->data_width = CQSPI_INST_TYPE_DUAL;
-			break;
-		case SNOR_PROTO_1_1_4:
-			f_pdata->data_width = CQSPI_INST_TYPE_QUAD;
-			break;
-		case SNOR_PROTO_1_1_8:
-			f_pdata->data_width = CQSPI_INST_TYPE_OCTAL;
-			break;
-		default:
-			return -EINVAL;
-		}
-	}
-
-	cqspi_configure(nor);
-
-	return 0;
-}
-
-static ssize_t cqspi_write(struct spi_nor *nor, loff_t to,
-			   size_t len, const u_char *buf)
-{
-	struct cqspi_flash_pdata *f_pdata = nor->priv;
-	struct cqspi_st *cqspi = f_pdata->cqspi;
-	int ret;
-
-	ret = cqspi_set_protocol(nor, 0);
-	if (ret)
-		return ret;
-
-	ret = cqspi_write_setup(nor);
-	if (ret)
-		return ret;
-
-	if (f_pdata->use_direct_mode) {
-		memcpy_toio(cqspi->ahb_base + to, buf, len);
-		ret = cqspi_wait_idle(cqspi);
-	} else {
-		ret = cqspi_indirect_write_execute(nor, to, buf, len);
-	}
-	if (ret)
-		return ret;
-
-	return len;
-}
-
-static void cqspi_rx_dma_callback(void *param)
-{
-	struct cqspi_st *cqspi = param;
-
-	complete(&cqspi->rx_dma_complete);
-}
-
-static int cqspi_direct_read_execute(struct spi_nor *nor, u_char *buf,
-				     loff_t from, size_t len)
-{
-	struct cqspi_flash_pdata *f_pdata = nor->priv;
-	struct cqspi_st *cqspi = f_pdata->cqspi;
-	enum dma_ctrl_flags flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT;
-	dma_addr_t dma_src = (dma_addr_t)cqspi->mmap_phys_base + from;
-	int ret = 0;
-	struct dma_async_tx_descriptor *tx;
-	dma_cookie_t cookie;
-	dma_addr_t dma_dst;
-
-	if (!cqspi->rx_chan || !virt_addr_valid(buf)) {
-		memcpy_fromio(buf, cqspi->ahb_base + from, len);
-		return 0;
-	}
-
-	dma_dst = dma_map_single(nor->dev, buf, len, DMA_FROM_DEVICE);
-	if (dma_mapping_error(nor->dev, dma_dst)) {
-		dev_err(nor->dev, "dma mapping failed\n");
-		return -ENOMEM;
-	}
-	tx = dmaengine_prep_dma_memcpy(cqspi->rx_chan, dma_dst, dma_src,
-				       len, flags);
-	if (!tx) {
-		dev_err(nor->dev, "device_prep_dma_memcpy error\n");
-		ret = -EIO;
-		goto err_unmap;
-	}
-
-	tx->callback = cqspi_rx_dma_callback;
-	tx->callback_param = cqspi;
-	cookie = tx->tx_submit(tx);
-	reinit_completion(&cqspi->rx_dma_complete);
-
-	ret = dma_submit_error(cookie);
-	if (ret) {
-		dev_err(nor->dev, "dma_submit_error %d\n", cookie);
-		ret = -EIO;
-		goto err_unmap;
-	}
-
-	dma_async_issue_pending(cqspi->rx_chan);
-	if (!wait_for_completion_timeout(&cqspi->rx_dma_complete,
-					 msecs_to_jiffies(len))) {
-		dmaengine_terminate_sync(cqspi->rx_chan);
-		dev_err(nor->dev, "DMA wait_for_completion_timeout\n");
-		ret = -ETIMEDOUT;
-		goto err_unmap;
-	}
-
-err_unmap:
-	dma_unmap_single(nor->dev, dma_dst, len, DMA_FROM_DEVICE);
-
-	return ret;
-}
-
-static ssize_t cqspi_read(struct spi_nor *nor, loff_t from,
-			  size_t len, u_char *buf)
-{
-	struct cqspi_flash_pdata *f_pdata = nor->priv;
-	int ret;
-
-	ret = cqspi_set_protocol(nor, 1);
-	if (ret)
-		return ret;
-
-	ret = cqspi_read_setup(nor);
-	if (ret)
-		return ret;
-
-	if (f_pdata->use_direct_mode)
-		ret = cqspi_direct_read_execute(nor, buf, from, len);
-	else
-		ret = cqspi_indirect_read_execute(nor, buf, from, len);
-	if (ret)
-		return ret;
-
-	return len;
-}
-
-static int cqspi_erase(struct spi_nor *nor, loff_t offs)
-{
-	int ret;
-
-	ret = cqspi_set_protocol(nor, 0);
-	if (ret)
-		return ret;
-
-	/* Send write enable, then erase commands. */
-	ret = nor->controller_ops->write_reg(nor, SPINOR_OP_WREN, NULL, 0);
-	if (ret)
-		return ret;
-
-	/* Set up command buffer. */
-	ret = cqspi_command_write_addr(nor, nor->erase_opcode, offs);
-	if (ret)
-		return ret;
-
-	return 0;
-}
-
-static int cqspi_prep(struct spi_nor *nor)
-{
-	struct cqspi_flash_pdata *f_pdata = nor->priv;
-	struct cqspi_st *cqspi = f_pdata->cqspi;
-
-	mutex_lock(&cqspi->bus_mutex);
-
-	return 0;
-}
-
-static void cqspi_unprep(struct spi_nor *nor)
-{
-	struct cqspi_flash_pdata *f_pdata = nor->priv;
-	struct cqspi_st *cqspi = f_pdata->cqspi;
-
-	mutex_unlock(&cqspi->bus_mutex);
-}
-
-static int cqspi_read_reg(struct spi_nor *nor, u8 opcode, u8 *buf, size_t len)
-{
-	int ret;
-
-	ret = cqspi_set_protocol(nor, 0);
-	if (!ret)
-		ret = cqspi_command_read(nor, opcode, buf, len);
-
-	return ret;
-}
-
-static int cqspi_write_reg(struct spi_nor *nor, u8 opcode, const u8 *buf,
-			   size_t len)
-{
-	int ret;
-
-	ret = cqspi_set_protocol(nor, 0);
-	if (!ret)
-		ret = cqspi_command_write(nor, opcode, buf, len);
-
-	return ret;
-}
-
-static int cqspi_of_get_flash_pdata(struct platform_device *pdev,
-				    struct cqspi_flash_pdata *f_pdata,
-				    struct device_node *np)
-{
-	if (of_property_read_u32(np, "cdns,read-delay", &f_pdata->read_delay)) {
-		dev_err(&pdev->dev, "couldn't determine read-delay\n");
-		return -ENXIO;
-	}
-
-	if (of_property_read_u32(np, "cdns,tshsl-ns", &f_pdata->tshsl_ns)) {
-		dev_err(&pdev->dev, "couldn't determine tshsl-ns\n");
-		return -ENXIO;
-	}
-
-	if (of_property_read_u32(np, "cdns,tsd2d-ns", &f_pdata->tsd2d_ns)) {
-		dev_err(&pdev->dev, "couldn't determine tsd2d-ns\n");
-		return -ENXIO;
-	}
-
-	if (of_property_read_u32(np, "cdns,tchsh-ns", &f_pdata->tchsh_ns)) {
-		dev_err(&pdev->dev, "couldn't determine tchsh-ns\n");
-		return -ENXIO;
-	}
-
-	if (of_property_read_u32(np, "cdns,tslch-ns", &f_pdata->tslch_ns)) {
-		dev_err(&pdev->dev, "couldn't determine tslch-ns\n");
-		return -ENXIO;
-	}
-
-	if (of_property_read_u32(np, "spi-max-frequency", &f_pdata->clk_rate)) {
-		dev_err(&pdev->dev, "couldn't determine spi-max-frequency\n");
-		return -ENXIO;
-	}
-
-	return 0;
-}
-
-static int cqspi_of_get_pdata(struct platform_device *pdev)
-{
-	struct device_node *np = pdev->dev.of_node;
-	struct cqspi_st *cqspi = platform_get_drvdata(pdev);
-
-	cqspi->is_decoded_cs = of_property_read_bool(np, "cdns,is-decoded-cs");
-
-	if (of_property_read_u32(np, "cdns,fifo-depth", &cqspi->fifo_depth)) {
-		dev_err(&pdev->dev, "couldn't determine fifo-depth\n");
-		return -ENXIO;
-	}
-
-	if (of_property_read_u32(np, "cdns,fifo-width", &cqspi->fifo_width)) {
-		dev_err(&pdev->dev, "couldn't determine fifo-width\n");
-		return -ENXIO;
-	}
-
-	if (of_property_read_u32(np, "cdns,trigger-address",
-				 &cqspi->trigger_address)) {
-		dev_err(&pdev->dev, "couldn't determine trigger-address\n");
-		return -ENXIO;
-	}
-
-	cqspi->rclk_en = of_property_read_bool(np, "cdns,rclk-en");
-
-	return 0;
-}
-
-static void cqspi_controller_init(struct cqspi_st *cqspi)
-{
-	u32 reg;
-
-	cqspi_controller_enable(cqspi, 0);
-
-	/* Configure the remap address register, no remap */
-	writel(0, cqspi->iobase + CQSPI_REG_REMAP);
-
-	/* Disable all interrupts. */
-	writel(0, cqspi->iobase + CQSPI_REG_IRQMASK);
-
-	/* Configure the SRAM split to 1:1 . */
-	writel(cqspi->fifo_depth / 2, cqspi->iobase + CQSPI_REG_SRAMPARTITION);
-
-	/* Load indirect trigger address. */
-	writel(cqspi->trigger_address,
-	       cqspi->iobase + CQSPI_REG_INDIRECTTRIGGER);
-
-	/* Program read watermark -- 1/2 of the FIFO. */
-	writel(cqspi->fifo_depth * cqspi->fifo_width / 2,
-	       cqspi->iobase + CQSPI_REG_INDIRECTRDWATERMARK);
-	/* Program write watermark -- 1/8 of the FIFO. */
-	writel(cqspi->fifo_depth * cqspi->fifo_width / 8,
-	       cqspi->iobase + CQSPI_REG_INDIRECTWRWATERMARK);
-
-	/* Enable Direct Access Controller */
-	reg = readl(cqspi->iobase + CQSPI_REG_CONFIG);
-	reg |= CQSPI_REG_CONFIG_ENB_DIR_ACC_CTRL;
-	writel(reg, cqspi->iobase + CQSPI_REG_CONFIG);
-
-	cqspi_controller_enable(cqspi, 1);
-}
-
-static void cqspi_request_mmap_dma(struct cqspi_st *cqspi)
-{
-	dma_cap_mask_t mask;
-
-	dma_cap_zero(mask);
-	dma_cap_set(DMA_MEMCPY, mask);
-
-	cqspi->rx_chan = dma_request_chan_by_mask(&mask);
-	if (IS_ERR(cqspi->rx_chan)) {
-		dev_err(&cqspi->pdev->dev, "No Rx DMA available\n");
-		cqspi->rx_chan = NULL;
-	}
-	init_completion(&cqspi->rx_dma_complete);
-}
-
-static const struct spi_nor_controller_ops cqspi_controller_ops = {
-	.prepare = cqspi_prep,
-	.unprepare = cqspi_unprep,
-	.read_reg = cqspi_read_reg,
-	.write_reg = cqspi_write_reg,
-	.read = cqspi_read,
-	.write = cqspi_write,
-	.erase = cqspi_erase,
-};
-
-static int cqspi_setup_flash(struct cqspi_st *cqspi, struct device_node *np)
-{
-	struct platform_device *pdev = cqspi->pdev;
-	struct device *dev = &pdev->dev;
-	const struct cqspi_driver_platdata *ddata;
-	struct spi_nor_hwcaps hwcaps;
-	struct cqspi_flash_pdata *f_pdata;
-	struct spi_nor *nor;
-	struct mtd_info *mtd;
-	unsigned int cs;
-	int i, ret;
-
-	ddata = of_device_get_match_data(dev);
-	if (!ddata) {
-		dev_err(dev, "Couldn't find driver data\n");
-		return -EINVAL;
-	}
-	hwcaps.mask = ddata->hwcaps_mask;
-
-	/* Get flash device data */
-	for_each_available_child_of_node(dev->of_node, np) {
-		ret = of_property_read_u32(np, "reg", &cs);
-		if (ret) {
-			dev_err(dev, "Couldn't determine chip select.\n");
-			goto err;
-		}
-
-		if (cs >= CQSPI_MAX_CHIPSELECT) {
-			ret = -EINVAL;
-			dev_err(dev, "Chip select %d out of range.\n", cs);
-			goto err;
-		}
-
-		f_pdata = &cqspi->f_pdata[cs];
-		f_pdata->cqspi = cqspi;
-		f_pdata->cs = cs;
-
-		ret = cqspi_of_get_flash_pdata(pdev, f_pdata, np);
-		if (ret)
-			goto err;
-
-		nor = &f_pdata->nor;
-		mtd = &nor->mtd;
-
-		mtd->priv = nor;
-
-		nor->dev = dev;
-		spi_nor_set_flash_node(nor, np);
-		nor->priv = f_pdata;
-		nor->controller_ops = &cqspi_controller_ops;
-
-		mtd->name = devm_kasprintf(dev, GFP_KERNEL, "%s.%d",
-					   dev_name(dev), cs);
-		if (!mtd->name) {
-			ret = -ENOMEM;
-			goto err;
-		}
-
-		ret = spi_nor_scan(nor, NULL, &hwcaps);
-		if (ret)
-			goto err;
-
-		ret = mtd_device_register(mtd, NULL, 0);
-		if (ret)
-			goto err;
-
-		f_pdata->registered = true;
-
-		if (mtd->size <= cqspi->ahb_size) {
-			f_pdata->use_direct_mode = true;
-			dev_dbg(nor->dev, "using direct mode for %s\n",
-				mtd->name);
-
-			if (!cqspi->rx_chan)
-				cqspi_request_mmap_dma(cqspi);
-		}
-	}
-
-	return 0;
-
-err:
-	for (i = 0; i < CQSPI_MAX_CHIPSELECT; i++)
-		if (cqspi->f_pdata[i].registered)
-			mtd_device_unregister(&cqspi->f_pdata[i].nor.mtd);
-	return ret;
-}
-
-static int cqspi_probe(struct platform_device *pdev)
-{
-	struct device_node *np = pdev->dev.of_node;
-	struct device *dev = &pdev->dev;
-	struct cqspi_st *cqspi;
-	struct resource *res;
-	struct resource *res_ahb;
-	struct reset_control *rstc, *rstc_ocp;
-	const struct cqspi_driver_platdata *ddata;
-	int ret;
-	int irq;
-
-	cqspi = devm_kzalloc(dev, sizeof(*cqspi), GFP_KERNEL);
-	if (!cqspi)
-		return -ENOMEM;
-
-	mutex_init(&cqspi->bus_mutex);
-	cqspi->pdev = pdev;
-	platform_set_drvdata(pdev, cqspi);
-
-	/* Obtain configuration from OF. */
-	ret = cqspi_of_get_pdata(pdev);
-	if (ret) {
-		dev_err(dev, "Cannot get mandatory OF data.\n");
-		return -ENODEV;
-	}
-
-	/* Obtain QSPI clock. */
-	cqspi->clk = devm_clk_get(dev, NULL);
-	if (IS_ERR(cqspi->clk)) {
-		dev_err(dev, "Cannot claim QSPI clock.\n");
-		return PTR_ERR(cqspi->clk);
-	}
-
-	/* Obtain and remap controller address. */
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	cqspi->iobase = devm_ioremap_resource(dev, res);
-	if (IS_ERR(cqspi->iobase)) {
-		dev_err(dev, "Cannot remap controller address.\n");
-		return PTR_ERR(cqspi->iobase);
-	}
-
-	/* Obtain and remap AHB address. */
-	res_ahb = platform_get_resource(pdev, IORESOURCE_MEM, 1);
-	cqspi->ahb_base = devm_ioremap_resource(dev, res_ahb);
-	if (IS_ERR(cqspi->ahb_base)) {
-		dev_err(dev, "Cannot remap AHB address.\n");
-		return PTR_ERR(cqspi->ahb_base);
-	}
-	cqspi->mmap_phys_base = (dma_addr_t)res_ahb->start;
-	cqspi->ahb_size = resource_size(res_ahb);
-
-	init_completion(&cqspi->transfer_complete);
-
-	/* Obtain IRQ line. */
-	irq = platform_get_irq(pdev, 0);
-	if (irq < 0)
-		return -ENXIO;
-
-	pm_runtime_enable(dev);
-	ret = pm_runtime_get_sync(dev);
-	if (ret < 0) {
-		pm_runtime_put_noidle(dev);
-		return ret;
-	}
-
-	ret = clk_prepare_enable(cqspi->clk);
-	if (ret) {
-		dev_err(dev, "Cannot enable QSPI clock.\n");
-		goto probe_clk_failed;
-	}
-
-	/* Obtain QSPI reset control */
-	rstc = devm_reset_control_get_optional_exclusive(dev, "qspi");
-	if (IS_ERR(rstc)) {
-		dev_err(dev, "Cannot get QSPI reset.\n");
-		return PTR_ERR(rstc);
-	}
-
-	rstc_ocp = devm_reset_control_get_optional_exclusive(dev, "qspi-ocp");
-	if (IS_ERR(rstc_ocp)) {
-		dev_err(dev, "Cannot get QSPI OCP reset.\n");
-		return PTR_ERR(rstc_ocp);
-	}
-
-	reset_control_assert(rstc);
-	reset_control_deassert(rstc);
-
-	reset_control_assert(rstc_ocp);
-	reset_control_deassert(rstc_ocp);
-
-	cqspi->master_ref_clk_hz = clk_get_rate(cqspi->clk);
-	ddata  = of_device_get_match_data(dev);
-	if (ddata && (ddata->quirks & CQSPI_NEEDS_WR_DELAY))
-		cqspi->wr_delay = 5 * DIV_ROUND_UP(NSEC_PER_SEC,
-						   cqspi->master_ref_clk_hz);
-
-	ret = devm_request_irq(dev, irq, cqspi_irq_handler, 0,
-			       pdev->name, cqspi);
-	if (ret) {
-		dev_err(dev, "Cannot request IRQ.\n");
-		goto probe_irq_failed;
-	}
-
-	cqspi_wait_idle(cqspi);
-	cqspi_controller_init(cqspi);
-	cqspi->current_cs = -1;
-	cqspi->sclk = 0;
-
-	ret = cqspi_setup_flash(cqspi, np);
-	if (ret) {
-		dev_err(dev, "Cadence QSPI NOR probe failed %d\n", ret);
-		goto probe_setup_failed;
-	}
-
-	return ret;
-probe_setup_failed:
-	cqspi_controller_enable(cqspi, 0);
-probe_irq_failed:
-	clk_disable_unprepare(cqspi->clk);
-probe_clk_failed:
-	pm_runtime_put_sync(dev);
-	pm_runtime_disable(dev);
-	return ret;
-}
-
-static int cqspi_remove(struct platform_device *pdev)
-{
-	struct cqspi_st *cqspi = platform_get_drvdata(pdev);
-	int i;
-
-	for (i = 0; i < CQSPI_MAX_CHIPSELECT; i++)
-		if (cqspi->f_pdata[i].registered)
-			mtd_device_unregister(&cqspi->f_pdata[i].nor.mtd);
-
-	cqspi_controller_enable(cqspi, 0);
-
-	if (cqspi->rx_chan)
-		dma_release_channel(cqspi->rx_chan);
-
-	clk_disable_unprepare(cqspi->clk);
-
-	pm_runtime_put_sync(&pdev->dev);
-	pm_runtime_disable(&pdev->dev);
-
-	return 0;
-}
-
-#ifdef CONFIG_PM_SLEEP
-static int cqspi_suspend(struct device *dev)
-{
-	struct cqspi_st *cqspi = dev_get_drvdata(dev);
-
-	cqspi_controller_enable(cqspi, 0);
-	return 0;
-}
-
-static int cqspi_resume(struct device *dev)
-{
-	struct cqspi_st *cqspi = dev_get_drvdata(dev);
-
-	cqspi_controller_enable(cqspi, 1);
-	return 0;
-}
-
-static const struct dev_pm_ops cqspi__dev_pm_ops = {
-	.suspend = cqspi_suspend,
-	.resume = cqspi_resume,
-};
-
-#define CQSPI_DEV_PM_OPS	(&cqspi__dev_pm_ops)
-#else
-#define CQSPI_DEV_PM_OPS	NULL
-#endif
-
-static const struct cqspi_driver_platdata cdns_qspi = {
-	.hwcaps_mask = CQSPI_BASE_HWCAPS_MASK,
-};
-
-static const struct cqspi_driver_platdata k2g_qspi = {
-	.hwcaps_mask = CQSPI_BASE_HWCAPS_MASK,
-	.quirks = CQSPI_NEEDS_WR_DELAY,
-};
-
-static const struct cqspi_driver_platdata am654_ospi = {
-	.hwcaps_mask = CQSPI_BASE_HWCAPS_MASK | SNOR_HWCAPS_READ_1_1_8,
-	.quirks = CQSPI_NEEDS_WR_DELAY,
-};
-
-static const struct of_device_id cqspi_dt_ids[] = {
-	{
-		.compatible = "cdns,qspi-nor",
-		.data = &cdns_qspi,
-	},
-	{
-		.compatible = "ti,k2g-qspi",
-		.data = &k2g_qspi,
-	},
-	{
-		.compatible = "ti,am654-ospi",
-		.data = &am654_ospi,
-	},
-	{ /* end of table */ }
-};
-
-MODULE_DEVICE_TABLE(of, cqspi_dt_ids);
-
-static struct platform_driver cqspi_platform_driver = {
-	.probe = cqspi_probe,
-	.remove = cqspi_remove,
-	.driver = {
-		.name = CQSPI_NAME,
-		.pm = CQSPI_DEV_PM_OPS,
-		.of_match_table = cqspi_dt_ids,
-	},
-};
-
-module_platform_driver(cqspi_platform_driver);
-
-MODULE_DESCRIPTION("Cadence QSPI Controller Driver");
-MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("platform:" CQSPI_NAME);
-MODULE_AUTHOR("Ley Foon Tan <lftan@altera.com>");
-MODULE_AUTHOR("Graham Moore <grmoore@opensource.altera.com>");