[PATCH 0/6] mtd: spi-nor: Move cadence-qaudspi to spi-mem framework

[PATCH 0/6] mtd: spi-nor: Move cadence-qaudspi to spi-mem framework

[Vignesh Raghavendra]

This series is a subset of "[PATCH v12 0/4] spi: cadence-quadspi: Add
support for the Cadence QSPI controller" by Ramuthevar,Vadivel MuruganX
<vadivel.muruganx.ramuthevar@linux.intel.com> that intended to move
cadence-quadspi driver to spi-mem framework

Those patches were trying to accomplish too many things in a single set
of patches and need to split into smaller patches. This is reduced
version of above series.

Changes that are intended to make migration easy are split into separate
patches. Patches 1 to 3 drop features that cannot be supported under
spi-mem at the moment (backward compatibility is maintained).
Patch 4-5 are trivial cleanups. Patch 6 does the actual conversion to
spi-mem and patch 7 moves the driver to drivers/spi folder.

I have tested both INDAC mode (used by non TI platforms like Altera
SoCFPGA) and DAC mode (used by TI platforms) on TI EVMs.

Patches to move move bindings over to
"Documentation/devicetree/bindings/spi/" directory and also conversion
of bindig doc to YAML will be posted separately.  Support for Intel
platform would follow that.

Changes since v12

- Drop intel platform related changes
- Drop DT bindings movement to YAML
- Split patch moving driver to spi-mem framework framework into
  multiple patches as suggested by Tudor.

v12: https://patchwork.ozlabs.org/project/linux-mtd/list/?series=163343&state=%2A&archive=both

Vadivel,

I have maintained the additional changes needed on top of this series
for Intel platform that were part of your v12 series here (needs cleanup):

https://github.com/r-vignesh/linux.git branch: cqspi-mig

Please use above branch to test the same.

Ramuthevar Vadivel Murugan (2):
  mtd: spi-nor: Convert cadence-quadspi to use spi-mem framework
  spi: Move cadence-quadspi driver to drivers/spi/

Vignesh Raghavendra (4):
  mtd: spi-nor: cadence-quadspi: Drop cdns,is-decoded-cs property
  mtd: spi-nor: cadence-quadspi: Provide a way to disable DAC mode
  mtd: spi-nor: cadence-quadspi: Don't initialize rx_dma_complete on
    failure
  mtd: spi-nor: cadence-quadspi: Fix error path on failure to acquire
    reset lines

 drivers/mtd/spi-nor/controllers/Kconfig       |  11 -
 drivers/mtd/spi-nor/controllers/Makefile      |   1 -
 drivers/spi/Kconfig                           |  11 +
 drivers/spi/Makefile                          |   1 +
 .../spi-cadence-quadspi.c}                    | 546 +++++++-----------
 5 files changed, 215 insertions(+), 355 deletions(-)
 rename drivers/{mtd/spi-nor/controllers/cadence-quadspi.c => spi/spi-cadence-quadspi.c} (73%)

-- 
2.26.2

[PATCH 1/6] mtd: spi-nor: cadence-quadspi: Drop cdns,is-decoded-cs property

[Vignesh Raghavendra]

Cadence QSPI provides a way to automatically decode CS based on the
offset accessed within memory map window. This feature cannot be
supported in spi-mem framework as controller driver would not have
access to flash geometry. Therefore drop this feature in preparation to
moving to spi-mem.

Note that, this feature never worked in the driver (Direct/Indirect mode
accesses did not take into account size of flash on other CSs) and there
are no users of this feature in kernel. Therefore dropping this should
not cause a regression

Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
---
 .../mtd/spi-nor/controllers/cadence-quadspi.c | 59 +++----------------
 1 file changed, 9 insertions(+), 50 deletions(-)

diff --git a/drivers/mtd/spi-nor/controllers/cadence-quadspi.c b/drivers/mtd/spi-nor/controllers/cadence-quadspi.c
index 494dcab4aaaa..fa54f85e16d7 100644
--- a/drivers/mtd/spi-nor/controllers/cadence-quadspi.c
+++ b/drivers/mtd/spi-nor/controllers/cadence-quadspi.c
@@ -77,11 +77,7 @@ struct cqspi_st {
 	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;
@@ -715,19 +711,15 @@ static void cqspi_chipselect(struct spi_nor *nor)
 	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;
+	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);
-	}
+	/* 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);
@@ -736,32 +728,6 @@ static void cqspi_chipselect(struct spi_nor *nor)
 	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)
 {
@@ -867,18 +833,13 @@ static void cqspi_configure(struct spi_nor *nor)
 	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);
+		cqspi_chipselect(nor);
 	}
 
 	/* Setup baudrate divisor and delays */
@@ -1145,8 +1106,6 @@ 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;
-- 
2.26.2

[PATCH 2/6] mtd: spi-nor: cadence-quadspi: Provide a way to disable DAC mode

[Vignesh Raghavendra]

Currently direct access mode is used on platforms that have AHB window
(memory mapped window) larger than flash size. This feature is limited
to TI platforms as non TI platforms have < 1MB of AHB window.
Therefore introduce a driver quirk to disable DAC mode and set it for
non TI compatibles. This is in preparation to move to spi-mem framework
where flash geometry cannot be known.

Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
---
 drivers/mtd/spi-nor/controllers/cadence-quadspi.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/mtd/spi-nor/controllers/cadence-quadspi.c b/drivers/mtd/spi-nor/controllers/cadence-quadspi.c
index fa54f85e16d7..4d2e732b85b1 100644
--- a/drivers/mtd/spi-nor/controllers/cadence-quadspi.c
+++ b/drivers/mtd/spi-nor/controllers/cadence-quadspi.c
@@ -34,6 +34,7 @@
 
 /* Quirks */
 #define CQSPI_NEEDS_WR_DELAY		BIT(0)
+#define CQSPI_DISABLE_DAC_MODE		BIT(1)
 
 /* Capabilities mask */
 #define CQSPI_BASE_HWCAPS_MASK					\
@@ -1254,7 +1255,8 @@ static int cqspi_setup_flash(struct cqspi_st *cqspi, struct device_node *np)
 
 		f_pdata->registered = true;
 
-		if (mtd->size <= cqspi->ahb_size) {
+		if (mtd->size <= cqspi->ahb_size &&
+		    !(ddata->quirks & CQSPI_DISABLE_DAC_MODE)) {
 			f_pdata->use_direct_mode = true;
 			dev_dbg(nor->dev, "using direct mode for %s\n",
 				mtd->name);
@@ -1450,6 +1452,7 @@ static const struct dev_pm_ops cqspi__dev_pm_ops = {
 
 static const struct cqspi_driver_platdata cdns_qspi = {
 	.hwcaps_mask = CQSPI_BASE_HWCAPS_MASK,
+	.quirks = CQSPI_DISABLE_DAC_MODE,
 };
 
 static const struct cqspi_driver_platdata k2g_qspi = {
-- 
2.26.2

[PATCH 3/6] mtd: spi-nor: cadence-quadspi: Don't initialize rx_dma_complete on failure

[Vignesh Raghavendra]

If driver fails to acquire DMA channel then don't initialize
rx_dma_complete struct as it won't be used.

Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
---
 drivers/mtd/spi-nor/controllers/cadence-quadspi.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/mtd/spi-nor/controllers/cadence-quadspi.c b/drivers/mtd/spi-nor/controllers/cadence-quadspi.c
index 4d2e732b85b1..6feb94a38dff 100644
--- a/drivers/mtd/spi-nor/controllers/cadence-quadspi.c
+++ b/drivers/mtd/spi-nor/controllers/cadence-quadspi.c
@@ -1173,6 +1173,7 @@ static void cqspi_request_mmap_dma(struct cqspi_st *cqspi)
 	if (IS_ERR(cqspi->rx_chan)) {
 		dev_err(&cqspi->pdev->dev, "No Rx DMA available\n");
 		cqspi->rx_chan = NULL;
+		return;
 	}
 	init_completion(&cqspi->rx_dma_complete);
 }
-- 
2.26.2

[PATCH 4/6] mtd: spi-nor: cadence-quadspi: Fix error path on failure to acquire reset lines

[Vignesh Raghavendra]

Make sure to undo the prior changes done by the driver when exiting due
to failure to acquire reset lines.

Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
---
 drivers/mtd/spi-nor/controllers/cadence-quadspi.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/mtd/spi-nor/controllers/cadence-quadspi.c b/drivers/mtd/spi-nor/controllers/cadence-quadspi.c
index 6feb94a38dff..51ed644f58c5 100644
--- a/drivers/mtd/spi-nor/controllers/cadence-quadspi.c
+++ b/drivers/mtd/spi-nor/controllers/cadence-quadspi.c
@@ -1352,13 +1352,13 @@ static int cqspi_probe(struct platform_device *pdev)
 	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);
+		goto probe_reset_failed;
 	}
 
 	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);
+		goto probe_reset_failed;
 	}
 
 	reset_control_assert(rstc);
@@ -1377,7 +1377,7 @@ static int cqspi_probe(struct platform_device *pdev)
 			       pdev->name, cqspi);
 	if (ret) {
 		dev_err(dev, "Cannot request IRQ.\n");
-		goto probe_irq_failed;
+		goto probe_reset_failed;
 	}
 
 	cqspi_wait_idle(cqspi);
@@ -1394,7 +1394,7 @@ static int cqspi_probe(struct platform_device *pdev)
 	return ret;
 probe_setup_failed:
 	cqspi_controller_enable(cqspi, 0);
-probe_irq_failed:
+probe_reset_failed:
 	clk_disable_unprepare(cqspi->clk);
 probe_clk_failed:
 	pm_runtime_put_sync(dev);
-- 
2.26.2

[PATCH 5/6] mtd: spi-nor: Convert cadence-quadspi to use spi-mem framework

[Vignesh Raghavendra]

From: Ramuthevar Vadivel Murugan <vadivel.muruganx.ramuthevar@linux.intel.com>

Move cadence-quadspi driver to use spi-mem framework. This is required
to make the driver support for SPI NAND flashes in future.

Driver is feature compliant with existing SPI NOR version.

Signed-off-by: Ramuthevar Vadivel Murugan <vadivel.muruganx.ramuthevar@linux.intel.com>
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
---
 .../mtd/spi-nor/controllers/cadence-quadspi.c | 469 +++++++-----------
 1 file changed, 183 insertions(+), 286 deletions(-)

diff --git a/drivers/mtd/spi-nor/controllers/cadence-quadspi.c b/drivers/mtd/spi-nor/controllers/cadence-quadspi.c
index 51ed644f58c5..d788692efc55 100644
--- a/drivers/mtd/spi-nor/controllers/cadence-quadspi.c
+++ b/drivers/mtd/spi-nor/controllers/cadence-quadspi.c
@@ -3,6 +3,8 @@
  * Driver for Cadence QSPI Controller
  *
  * Copyright Altera Corporation (C) 2012-2014. All rights reserved.
+ * Copyright Intel Corporation (C) 2019-2020. All rights reserved.
+ * Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com
  */
 #include <linux/clk.h>
 #include <linux/completion.h>
@@ -17,9 +19,6 @@
 #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>
@@ -27,6 +26,7 @@
 #include <linux/reset.h>
 #include <linux/sched.h>
 #include <linux/spi/spi.h>
+#include <linux/spi/spi-mem.h>
 #include <linux/timer.h>
 
 #define CQSPI_NAME			"cadence-qspi"
@@ -36,16 +36,12 @@
 #define CQSPI_NEEDS_WR_DELAY		BIT(0)
 #define CQSPI_DISABLE_DAC_MODE		BIT(1)
 
-/* 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)
+/* Capabilities */
+#define CQSPI_SUPPORTS_OCTAL		BIT(0)
 
 struct cqspi_st;
 
 struct cqspi_flash_pdata {
-	struct spi_nor	nor;
 	struct cqspi_st	*cqspi;
 	u32		clk_rate;
 	u32		read_delay;
@@ -58,7 +54,6 @@ struct cqspi_flash_pdata {
 	u8		data_width;
 	u8		cs;
 	bool		registered;
-	bool		use_direct_mode;
 };
 
 struct cqspi_st {
@@ -71,7 +66,6 @@ struct cqspi_st {
 	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;
@@ -84,6 +78,7 @@ struct cqspi_st {
 	bool			rclk_en;
 	u32			trigger_address;
 	u32			wr_delay;
+	bool			use_dac_mode;
 	struct cqspi_flash_pdata f_pdata[CQSPI_MAX_CHIPSELECT];
 };
 
@@ -282,9 +277,8 @@ static irqreturn_t cqspi_irq_handler(int this_irq, void *dev)
 	return IRQ_HANDLED;
 }
 
-static unsigned int cqspi_calc_rdreg(struct spi_nor *nor)
+static unsigned int cqspi_calc_rdreg(struct cqspi_flash_pdata *f_pdata)
 {
-	struct cqspi_flash_pdata *f_pdata = nor->priv;
 	u32 rdreg = 0;
 
 	rdreg |= f_pdata->inst_width << CQSPI_REG_RD_INSTR_TYPE_INSTR_LSB;
@@ -351,19 +345,21 @@ static int cqspi_exec_flash_cmd(struct cqspi_st *cqspi, unsigned int reg)
 	return cqspi_wait_idle(cqspi);
 }
 
-static int cqspi_command_read(struct spi_nor *nor, u8 opcode,
-			      u8 *rxbuf, size_t n_rx)
+static int cqspi_command_read(struct cqspi_flash_pdata *f_pdata,
+			      const struct spi_mem_op *op)
 {
-	struct cqspi_flash_pdata *f_pdata = nor->priv;
 	struct cqspi_st *cqspi = f_pdata->cqspi;
 	void __iomem *reg_base = cqspi->iobase;
+	u8 *rxbuf = op->data.buf.in;
+	u8 opcode = op->cmd.opcode;
+	size_t n_rx = op->data.nbytes;
 	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,
+		dev_err(&cqspi->pdev->dev,
 			"Invalid input argument, len %zu rxbuf 0x%p\n",
 			n_rx, rxbuf);
 		return -EINVAL;
@@ -371,7 +367,7 @@ static int cqspi_command_read(struct spi_nor *nor, u8 opcode,
 
 	reg = opcode << CQSPI_REG_CMDCTRL_OPCODE_LSB;
 
-	rdreg = cqspi_calc_rdreg(nor);
+	rdreg = cqspi_calc_rdreg(f_pdata);
 	writel(rdreg, reg_base + CQSPI_REG_RD_INSTR);
 
 	reg |= (0x1 << CQSPI_REG_CMDCTRL_RD_EN_LSB);
@@ -400,25 +396,35 @@ static int cqspi_command_read(struct spi_nor *nor, u8 opcode,
 	return 0;
 }
 
-static int cqspi_command_write(struct spi_nor *nor, const u8 opcode,
-			       const u8 *txbuf, size_t n_tx)
+static int cqspi_command_write(struct cqspi_flash_pdata *f_pdata,
+			       const struct spi_mem_op *op)
 {
-	struct cqspi_flash_pdata *f_pdata = nor->priv;
 	struct cqspi_st *cqspi = f_pdata->cqspi;
 	void __iomem *reg_base = cqspi->iobase;
+	const u8 opcode = op->cmd.opcode;
+	const u8 *txbuf = op->data.buf.out;
+	size_t n_tx = op->data.nbytes;
 	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,
+		dev_err(&cqspi->pdev->dev,
 			"Invalid input argument, cmdlen %zu txbuf 0x%p\n",
 			n_tx, txbuf);
 		return -EINVAL;
 	}
 
 	reg = opcode << CQSPI_REG_CMDCTRL_OPCODE_LSB;
+
+	if (op->addr.nbytes) {
+		reg |= (0x1 << CQSPI_REG_CMDCTRL_ADDR_EN_LSB);
+		reg |= ((op->addr.nbytes - 1) & CQSPI_REG_CMDCTRL_ADD_BYTES_MASK)
+		<< CQSPI_REG_CMDCTRL_ADD_BYTES_LSB;
+
+		writel(op->addr.val, reg_base + CQSPI_REG_CMDADDRESS);
+	}
+
 	if (n_tx) {
 		reg |= (0x1 << CQSPI_REG_CMDCTRL_WR_EN_LSB);
 		reg |= ((n_tx - 1) & CQSPI_REG_CMDCTRL_WR_BYTES_MASK)
@@ -436,73 +442,46 @@ static int cqspi_command_write(struct spi_nor *nor, const u8 opcode,
 			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)
+static int cqspi_read_setup(struct cqspi_flash_pdata *f_pdata,
+			    const struct spi_mem_op *op)
 {
-	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);
+	reg = op->cmd.opcode << CQSPI_REG_RD_INSTR_OPCODE_LSB;
+	reg |= cqspi_calc_rdreg(f_pdata);
 
 	/* Setup dummy clock cycles */
-	dummy_clk = nor->read_dummy;
+	dummy_clk = op->dummy.nbytes * 8;
 	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;
-	}
+	if (dummy_clk / 8)
+		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);
+	reg |= (op->addr.nbytes - 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)
+static int cqspi_indirect_read_execute(struct cqspi_flash_pdata *f_pdata,
+				       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;
+	struct device *dev = &cqspi->pdev->dev;
 	void __iomem *reg_base = cqspi->iobase;
 	void __iomem *ahb_base = cqspi->ahb_base;
 	unsigned int remaining = n_rx;
@@ -525,13 +504,13 @@ static int cqspi_indirect_read_execute(struct spi_nor *nor, u8 *rxbuf,
 
 	while (remaining > 0) {
 		if (!wait_for_completion_timeout(&cqspi->transfer_complete,
-				msecs_to_jiffies(CQSPI_READ_TIMEOUT_MS)))
+						 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");
+			dev_err(dev, "Indirect read timeout, no bytes\n");
 			goto failrd;
 		}
 
@@ -567,8 +546,7 @@ static int cqspi_indirect_read_execute(struct spi_nor *nor, u8 *rxbuf,
 	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);
+		dev_err(dev, "Indirect read completion error (%i)\n", ret);
 		goto failrd;
 	}
 
@@ -590,32 +568,32 @@ static int cqspi_indirect_read_execute(struct spi_nor *nor, u8 *rxbuf,
 	return ret;
 }
 
-static int cqspi_write_setup(struct spi_nor *nor)
+static int cqspi_write_setup(struct cqspi_flash_pdata *f_pdata,
+			     const struct spi_mem_op *op)
 {
 	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;
+	reg = op->cmd.opcode << CQSPI_REG_WR_INSTR_OPCODE_LSB;
 	writel(reg, reg_base + CQSPI_REG_WR_INSTR);
-	reg = cqspi_calc_rdreg(nor);
+	reg = cqspi_calc_rdreg(f_pdata);
 	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);
+	reg |= (op->addr.nbytes - 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)
+static int cqspi_indirect_write_execute(struct cqspi_flash_pdata *f_pdata,
+					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;
+	struct device *dev = &cqspi->pdev->dev;
 	void __iomem *reg_base = cqspi->iobase;
 	unsigned int remaining = n_tx;
 	unsigned int write_bytes;
@@ -645,7 +623,7 @@ static int cqspi_indirect_write_execute(struct spi_nor *nor, loff_t to_addr,
 	while (remaining > 0) {
 		size_t write_words, mod_bytes;
 
-		write_bytes = remaining > page_size ? page_size : remaining;
+		write_bytes = remaining;
 		write_words = write_bytes / 4;
 		mod_bytes = write_bytes % 4;
 		/* Write 4 bytes at a time then single bytes. */
@@ -662,8 +640,8 @@ static int cqspi_indirect_write_execute(struct spi_nor *nor, loff_t to_addr,
 		}
 
 		if (!wait_for_completion_timeout(&cqspi->transfer_complete,
-					msecs_to_jiffies(CQSPI_TIMEOUT_MS))) {
-			dev_err(nor->dev, "Indirect write timeout\n");
+						 msecs_to_jiffies(CQSPI_TIMEOUT_MS))) {
+			dev_err(dev, "Indirect write timeout\n");
 			ret = -ETIMEDOUT;
 			goto failwr;
 		}
@@ -678,8 +656,7 @@ static int cqspi_indirect_write_execute(struct spi_nor *nor, loff_t to_addr,
 	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);
+		dev_err(dev, "Indirect write completion error (%i)\n", ret);
 		goto failwr;
 	}
 
@@ -703,9 +680,8 @@ static int cqspi_indirect_write_execute(struct spi_nor *nor, loff_t to_addr,
 	return ret;
 }
 
-static void cqspi_chipselect(struct spi_nor *nor)
+static void cqspi_chipselect(struct cqspi_flash_pdata *f_pdata)
 {
-	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;
@@ -740,9 +716,8 @@ static unsigned int calculate_ticks_for_ns(const unsigned int ref_clk_hz,
 	return ticks;
 }
 
-static void cqspi_delay(struct spi_nor *nor)
+static void cqspi_delay(struct cqspi_flash_pdata *f_pdata)
 {
-	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;
@@ -826,11 +801,10 @@ static void cqspi_controller_enable(struct cqspi_st *cqspi, bool enable)
 	writel(reg, reg_base + CQSPI_REG_CONFIG);
 }
 
-static void cqspi_configure(struct spi_nor *nor)
+static void cqspi_configure(struct cqspi_flash_pdata *f_pdata,
+			    unsigned long sclk)
 {
-	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);
 
@@ -840,14 +814,14 @@ static void cqspi_configure(struct spi_nor *nor)
 	/* Switch chip select. */
 	if (switch_cs) {
 		cqspi->current_cs = f_pdata->cs;
-		cqspi_chipselect(nor);
+		cqspi_chipselect(f_pdata);
 	}
 
 	/* Setup baudrate divisor and delays */
 	if (switch_ck) {
 		cqspi->sclk = sclk;
 		cqspi_config_baudrate_div(cqspi);
-		cqspi_delay(nor);
+		cqspi_delay(f_pdata);
 		cqspi_readdata_capture(cqspi, !cqspi->rclk_en,
 				       f_pdata->read_delay);
 	}
@@ -856,26 +830,25 @@ static void cqspi_configure(struct spi_nor *nor)
 		cqspi_controller_enable(cqspi, 1);
 }
 
-static int cqspi_set_protocol(struct spi_nor *nor, const int read)
+static int cqspi_set_protocol(struct cqspi_flash_pdata *f_pdata,
+			      const struct spi_mem_op *op)
 {
-	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:
+	if (op->data.dir == SPI_MEM_DATA_IN) {
+		switch (op->data.buswidth) {
+		case 1:
 			f_pdata->data_width = CQSPI_INST_TYPE_SINGLE;
 			break;
-		case SNOR_PROTO_1_1_2:
+		case 2:
 			f_pdata->data_width = CQSPI_INST_TYPE_DUAL;
 			break;
-		case SNOR_PROTO_1_1_4:
+		case 4:
 			f_pdata->data_width = CQSPI_INST_TYPE_QUAD;
 			break;
-		case SNOR_PROTO_1_1_8:
+		case 8:
 			f_pdata->data_width = CQSPI_INST_TYPE_OCTAL;
 			break;
 		default:
@@ -883,36 +856,32 @@ static int cqspi_set_protocol(struct spi_nor *nor, const int read)
 		}
 	}
 
-	cqspi_configure(nor);
-
 	return 0;
 }
 
-static ssize_t cqspi_write(struct spi_nor *nor, loff_t to,
-			   size_t len, const u_char *buf)
+static ssize_t cqspi_write(struct cqspi_flash_pdata *f_pdata,
+			   const struct spi_mem_op *op)
 {
-	struct cqspi_flash_pdata *f_pdata = nor->priv;
 	struct cqspi_st *cqspi = f_pdata->cqspi;
+	loff_t to = op->addr.val;
+	size_t len = op->data.nbytes;
+	const u_char *buf = op->data.buf.out;
 	int ret;
 
-	ret = cqspi_set_protocol(nor, 0);
+	ret = cqspi_set_protocol(f_pdata, op);
 	if (ret)
 		return ret;
 
-	ret = cqspi_write_setup(nor);
+	ret = cqspi_write_setup(f_pdata, op);
 	if (ret)
 		return ret;
 
-	if (f_pdata->use_direct_mode) {
+	if (cqspi->use_dac_mode && ((to + len) <= cqspi->ahb_size)) {
 		memcpy_toio(cqspi->ahb_base + to, buf, len);
-		ret = cqspi_wait_idle(cqspi);
-	} else {
-		ret = cqspi_indirect_write_execute(nor, to, buf, len);
+		return cqspi_wait_idle(cqspi);
 	}
-	if (ret)
-		return ret;
 
-	return len;
+	return cqspi_indirect_write_execute(f_pdata, to, buf, len);
 }
 
 static void cqspi_rx_dma_callback(void *param)
@@ -922,11 +891,11 @@ static void cqspi_rx_dma_callback(void *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)
+static int cqspi_direct_read_execute(struct cqspi_flash_pdata *f_pdata,
+				     u_char *buf, loff_t from, size_t len)
 {
-	struct cqspi_flash_pdata *f_pdata = nor->priv;
 	struct cqspi_st *cqspi = f_pdata->cqspi;
+	struct device *dev = &cqspi->pdev->dev;
 	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;
@@ -939,15 +908,15 @@ static int cqspi_direct_read_execute(struct spi_nor *nor, u_char *buf,
 		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");
+	dma_dst = dma_map_single(dev, buf, len, DMA_FROM_DEVICE);
+	if (dma_mapping_error(dev, dma_dst)) {
+		dev_err(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");
+		dev_err(dev, "device_prep_dma_memcpy error\n");
 		ret = -EIO;
 		goto err_unmap;
 	}
@@ -959,7 +928,7 @@ static int cqspi_direct_read_execute(struct spi_nor *nor, u_char *buf,
 
 	ret = dma_submit_error(cookie);
 	if (ret) {
-		dev_err(nor->dev, "dma_submit_error %d\n", cookie);
+		dev_err(dev, "dma_submit_error %d\n", cookie);
 		ret = -EIO;
 		goto err_unmap;
 	}
@@ -968,99 +937,68 @@ static int cqspi_direct_read_execute(struct spi_nor *nor, u_char *buf,
 	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");
+		dev_err(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);
+	dma_unmap_single(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)
+static ssize_t cqspi_read(struct cqspi_flash_pdata *f_pdata,
+			  const struct spi_mem_op *op)
 {
+	struct cqspi_st *cqspi = f_pdata->cqspi;
+	loff_t from = op->addr.val;
+	size_t len = op->data.nbytes;
+	u_char *buf = op->data.buf.in;
 	int ret;
 
-	ret = cqspi_set_protocol(nor, 0);
+	ret = cqspi_set_protocol(f_pdata, op);
 	if (ret)
 		return ret;
 
-	/* Send write enable, then erase commands. */
-	ret = nor->controller_ops->write_reg(nor, SPINOR_OP_WREN, NULL, 0);
+	ret = cqspi_read_setup(f_pdata, op);
 	if (ret)
 		return ret;
 
-	/* Set up command buffer. */
-	ret = cqspi_command_write_addr(nor, nor->erase_opcode, offs);
-	if (ret)
-		return ret;
+	if (cqspi->use_dac_mode && ((from + len) <= cqspi->ahb_size))
+		return cqspi_direct_read_execute(f_pdata, buf, from, len);
 
-	return 0;
+	return cqspi_indirect_read_execute(f_pdata, buf, from, len);
 }
 
-static int cqspi_prep(struct spi_nor *nor)
+static int cqspi_mem_process(struct spi_mem *mem, const struct spi_mem_op *op)
 {
-	struct cqspi_flash_pdata *f_pdata = nor->priv;
-	struct cqspi_st *cqspi = f_pdata->cqspi;
-
-	mutex_lock(&cqspi->bus_mutex);
-
-	return 0;
-}
+	struct cqspi_st *cqspi = spi_master_get_devdata(mem->spi->master);
+	struct cqspi_flash_pdata *f_pdata;
 
-static void cqspi_unprep(struct spi_nor *nor)
-{
-	struct cqspi_flash_pdata *f_pdata = nor->priv;
-	struct cqspi_st *cqspi = f_pdata->cqspi;
+	f_pdata = &cqspi->f_pdata[mem->spi->chip_select];
+	cqspi_configure(f_pdata, mem->spi->max_speed_hz);
 
-	mutex_unlock(&cqspi->bus_mutex);
-}
+	if (op->data.dir == SPI_MEM_DATA_IN && op->data.buf.in) {
+		if (!op->addr.nbytes)
+			return cqspi_command_read(f_pdata, op);
 
-static int cqspi_read_reg(struct spi_nor *nor, u8 opcode, u8 *buf, size_t len)
-{
-	int ret;
+		return cqspi_read(f_pdata, op);
+	}
 
-	ret = cqspi_set_protocol(nor, 0);
-	if (!ret)
-		ret = cqspi_command_read(nor, opcode, buf, len);
+	if (!op->addr.nbytes || !op->data.buf.out)
+		return cqspi_command_write(f_pdata, op);
 
-	return ret;
+	return cqspi_write(f_pdata, op);
 }
 
-static int cqspi_write_reg(struct spi_nor *nor, u8 opcode, const u8 *buf,
-			   size_t len)
+static int cqspi_exec_mem_op(struct spi_mem *mem, const struct spi_mem_op *op)
 {
 	int ret;
 
-	ret = cqspi_set_protocol(nor, 0);
-	if (!ret)
-		ret = cqspi_command_write(nor, opcode, buf, len);
+	ret = cqspi_mem_process(mem, op);
+	if (ret)
+		dev_err(&mem->spi->dev, "operation failed with %d\n", ret);
 
 	return ret;
 }
@@ -1102,24 +1040,24 @@ static int cqspi_of_get_flash_pdata(struct platform_device *pdev,
 	return 0;
 }
 
-static int cqspi_of_get_pdata(struct platform_device *pdev)
+static int cqspi_of_get_pdata(struct cqspi_st *cqspi)
 {
-	struct device_node *np = pdev->dev.of_node;
-	struct cqspi_st *cqspi = platform_get_drvdata(pdev);
+	struct device *dev = &cqspi->pdev->dev;
+	struct device_node *np = dev->of_node;
 
 	if (of_property_read_u32(np, "cdns,fifo-depth", &cqspi->fifo_depth)) {
-		dev_err(&pdev->dev, "couldn't determine fifo-depth\n");
+		dev_err(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");
+		dev_err(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");
+		dev_err(dev, "couldn't determine trigger-address\n");
 		return -ENXIO;
 	}
 
@@ -1162,7 +1100,7 @@ static void cqspi_controller_init(struct cqspi_st *cqspi)
 	cqspi_controller_enable(cqspi, 1);
 }
 
-static void cqspi_request_mmap_dma(struct cqspi_st *cqspi)
+static int cqspi_request_mmap_dma(struct cqspi_st *cqspi)
 {
 	dma_cap_mask_t mask;
 
@@ -1171,133 +1109,79 @@ static void cqspi_request_mmap_dma(struct cqspi_st *cqspi)
 
 	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");
+		int ret = PTR_ERR(cqspi->rx_chan);
+
+		if (ret != -EPROBE_DEFER)
+			dev_err(&cqspi->pdev->dev, "No Rx DMA available\n");
 		cqspi->rx_chan = NULL;
-		return;
+		return ret;
 	}
 	init_completion(&cqspi->rx_dma_complete);
+
+	return 0;
 }
 
-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 const struct spi_controller_mem_ops cqspi_mem_ops = {
+	.exec_op = cqspi_exec_mem_op,
 };
 
-static int cqspi_setup_flash(struct cqspi_st *cqspi, struct device_node *np)
+static int cqspi_setup_flash(struct cqspi_st *cqspi)
 {
 	struct platform_device *pdev = cqspi->pdev;
 	struct device *dev = &pdev->dev;
-	const struct cqspi_driver_platdata *ddata;
-	struct spi_nor_hwcaps hwcaps;
+	struct device_node *np = dev->of_node;
 	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) {
+		if (of_property_read_u32(np, "reg", &cs)) {
 			dev_err(dev, "Couldn't determine chip select.\n");
-			goto err;
+			continue;
 		}
 
 		if (cs >= CQSPI_MAX_CHIPSELECT) {
-			ret = -EINVAL;
 			dev_err(dev, "Chip select %d out of range.\n", cs);
-			goto err;
+			continue;
 		}
 
 		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 &&
-		    !(ddata->quirks & CQSPI_DISABLE_DAC_MODE)) {
-			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 cqspi_of_get_flash_pdata(pdev, f_pdata, np);
 	}
 
 	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;
+	const struct cqspi_driver_platdata *ddata;
+	struct reset_control *rstc, *rstc_ocp;
 	struct device *dev = &pdev->dev;
+	struct spi_master *master;
+	struct resource *res_ahb;
 	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)
+	master = spi_alloc_master(&pdev->dev, sizeof(*cqspi));
+	if (!master) {
+		dev_err(&pdev->dev, "spi_alloc_master failed\n");
 		return -ENOMEM;
+	}
+	master->mode_bits = SPI_RX_QUAD | SPI_RX_DUAL;
+	master->mem_ops = &cqspi_mem_ops;
+	master->dev.of_node = pdev->dev.of_node;
+
+	cqspi = spi_master_get_devdata(master);
 
-	mutex_init(&cqspi->bus_mutex);
 	cqspi->pdev = pdev;
-	platform_set_drvdata(pdev, cqspi);
 
 	/* Obtain configuration from OF. */
-	ret = cqspi_of_get_pdata(pdev);
+	ret = cqspi_of_get_pdata(cqspi);
 	if (ret) {
 		dev_err(dev, "Cannot get mandatory OF data.\n");
 		return -ENODEV;
@@ -1369,9 +1253,15 @@ static int cqspi_probe(struct platform_device *pdev)
 
 	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);
+	if (ddata) {
+		if (ddata->quirks & CQSPI_NEEDS_WR_DELAY)
+			cqspi->wr_delay = 5 * DIV_ROUND_UP(NSEC_PER_SEC,
+						cqspi->master_ref_clk_hz);
+		if (ddata->hwcaps_mask & CQSPI_SUPPORTS_OCTAL)
+			master->mode_bits |= SPI_RX_OCTAL;
+		if (!(ddata->quirks & CQSPI_DISABLE_DAC_MODE))
+			cqspi->use_dac_mode = true;
+	}
 
 	ret = devm_request_irq(dev, irq, cqspi_irq_handler, 0,
 			       pdev->name, cqspi);
@@ -1385,13 +1275,25 @@ static int cqspi_probe(struct platform_device *pdev)
 	cqspi->current_cs = -1;
 	cqspi->sclk = 0;
 
-	ret = cqspi_setup_flash(cqspi, np);
+	ret = cqspi_setup_flash(cqspi);
 	if (ret) {
-		dev_err(dev, "Cadence QSPI NOR probe failed %d\n", ret);
+		dev_err(dev, "failed to setup flash parameters %d\n", ret);
 		goto probe_setup_failed;
 	}
 
-	return ret;
+	if (cqspi->use_dac_mode) {
+		ret = cqspi_request_mmap_dma(cqspi);
+		if (ret == -EPROBE_DEFER)
+			goto probe_setup_failed;
+	}
+
+	ret = devm_spi_register_master(dev, master);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to register SPI ctlr %d\n", ret);
+		goto probe_setup_failed;
+	}
+
+	return 0;
 probe_setup_failed:
 	cqspi_controller_enable(cqspi, 0);
 probe_reset_failed:
@@ -1405,11 +1307,6 @@ static int cqspi_probe(struct platform_device *pdev)
 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);
 
@@ -1452,17 +1349,15 @@ static const struct dev_pm_ops cqspi__dev_pm_ops = {
 #endif
 
 static const struct cqspi_driver_platdata cdns_qspi = {
-	.hwcaps_mask = CQSPI_BASE_HWCAPS_MASK,
 	.quirks = CQSPI_DISABLE_DAC_MODE,
 };
 
 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,
+	.hwcaps_mask = CQSPI_SUPPORTS_OCTAL,
 	.quirks = CQSPI_NEEDS_WR_DELAY,
 };
 
@@ -1501,3 +1396,5 @@ 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>");
+MODULE_AUTHOR("Vadivel Murugan R <vadivel.muruganx.ramuthevar@intel.com>");
+MODULE_AUTHOR("Vignesh Raghavendra <vigneshr@ti.com>");
-- 
2.26.2

[PATCH 6/6] spi: Move cadence-quadspi driver to drivers/spi/

[Vignesh Raghavendra]

From: Ramuthevar Vadivel Murugan <vadivel.muruganx.ramuthevar@linux.intel.com>

Now that cadence-quadspi has been converted to use spi-mem framework,
move it under drivers/spi/

Update license header to match SPI subsystem style

Signed-off-by: Ramuthevar Vadivel Murugan <vadivel.muruganx.ramuthevar@linux.intel.com>
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
---
 drivers/mtd/spi-nor/controllers/Kconfig            | 11 -----------
 drivers/mtd/spi-nor/controllers/Makefile           |  1 -
 drivers/spi/Kconfig                                | 11 +++++++++++
 drivers/spi/Makefile                               |  1 +
 .../spi-cadence-quadspi.c}                         | 14 +++++++-------
 5 files changed, 19 insertions(+), 19 deletions(-)
 rename drivers/{mtd/spi-nor/controllers/cadence-quadspi.c => spi/spi-cadence-quadspi.c} (99%)

diff --git a/drivers/mtd/spi-nor/controllers/Kconfig b/drivers/mtd/spi-nor/controllers/Kconfig
index 10b86660b821..95fcd4b435be 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/spi/Kconfig b/drivers/spi/Kconfig
index 17e7e4afc0fc..15f308571163 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -200,6 +200,17 @@ config SPI_CADENCE
 	  This selects the Cadence SPI controller master driver
 	  used by Xilinx Zynq and ZynqMP.
 
+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_CLPS711X
 	tristate "CLPS711X host SPI controller"
 	depends on ARCH_CLPS711X || COMPILE_TEST
diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile
index 889368f4ad53..f03834d1d312 100644
--- a/drivers/spi/Makefile
+++ b/drivers/spi/Makefile
@@ -31,6 +31,7 @@ obj-$(CONFIG_SPI_BCM_QSPI)		+= spi-iproc-qspi.o spi-brcmstb-qspi.o spi-bcm-qspi.
 obj-$(CONFIG_SPI_BITBANG)		+= spi-bitbang.o
 obj-$(CONFIG_SPI_BUTTERFLY)		+= spi-butterfly.o
 obj-$(CONFIG_SPI_CADENCE)		+= spi-cadence.o
+obj-$(CONFIG_SPI_CADENCE_QUADSPI)	+= spi-cadence-quadspi.o
 obj-$(CONFIG_SPI_CLPS711X)		+= spi-clps711x.o
 obj-$(CONFIG_SPI_COLDFIRE_QSPI)		+= spi-coldfire-qspi.o
 obj-$(CONFIG_SPI_DAVINCI)		+= spi-davinci.o
diff --git a/drivers/mtd/spi-nor/controllers/cadence-quadspi.c b/drivers/spi/spi-cadence-quadspi.c
similarity index 99%
rename from drivers/mtd/spi-nor/controllers/cadence-quadspi.c
rename to drivers/spi/spi-cadence-quadspi.c
index d788692efc55..de009e44f2aa 100644
--- a/drivers/mtd/spi-nor/controllers/cadence-quadspi.c
+++ b/drivers/spi/spi-cadence-quadspi.c
@@ -1,11 +1,11 @@
 // SPDX-License-Identifier: GPL-2.0-only
-/*
- * Driver for Cadence QSPI Controller
- *
- * Copyright Altera Corporation (C) 2012-2014. All rights reserved.
- * Copyright Intel Corporation (C) 2019-2020. All rights reserved.
- * Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com
- */
+//
+// Driver for Cadence QSPI Controller
+//
+// Copyright Altera Corporation (C) 2012-2014. All rights reserved.
+// Copyright Intel Corporation (C) 2019-2020. All rights reserved.
+// Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com
+
 #include <linux/clk.h>
 #include <linux/completion.h>
 #include <linux/delay.h>
-- 
2.26.2

Re: [PATCH 0/6] mtd: spi-nor: Move cadence-qaudspi to spi-mem framework

[Ramuthevar, Vadivel MuruganX]

Hi Vignesh,

On 9/5/2020 2:54 am, Vignesh Raghavendra wrote:
> Vadivel,
> 
> I have maintained the additional changes needed on top of this series
> for Intel platform that were part of your v12 series here (needs cleanup):
> 
> https://github.com/r-vignesh/linux.git  branch: cqspi-mig
> 
> Please use above branch to test the same.

Thank you for the sending the patches on behalf of, will do the cleanup.
also I have already prepared YAML file , will send as separate patch.

Regards
Vadivel

Re: [PATCH 1/6] mtd: spi-nor: cadence-quadspi: Drop cdns,is-decoded-cs property

[Vignesh Raghavendra]

On 09/05/20 12:24 am, Vignesh Raghavendra wrote:
> Cadence QSPI provides a way to automatically decode CS based on the
> offset accessed within memory map window. This feature cannot be
> supported in spi-mem framework as controller driver would not have
> access to flash geometry. Therefore drop this feature in preparation to
> moving to spi-mem.
> 
> Note that, this feature never worked in the driver (Direct/Indirect mode
> accesses did not take into account size of flash on other CSs) and there
> are no users of this feature in kernel. Therefore dropping this should
> not cause a regression
> 

I realized cdns,is-decoded-cs property does not depend on
cqspi_configure_cs_and_sizes() and can still be supported w/o knowing
flash geometry... Will respin.. 

Regards
Vignesh

> Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
> ---
>  .../mtd/spi-nor/controllers/cadence-quadspi.c | 59 +++----------------
>  1 file changed, 9 insertions(+), 50 deletions(-)
> 
> diff --git a/drivers/mtd/spi-nor/controllers/cadence-quadspi.c b/drivers/mtd/spi-nor/controllers/cadence-quadspi.c
> index 494dcab4aaaa..fa54f85e16d7 100644
> --- a/drivers/mtd/spi-nor/controllers/cadence-quadspi.c
> +++ b/drivers/mtd/spi-nor/controllers/cadence-quadspi.c
> @@ -77,11 +77,7 @@ struct cqspi_st {
>        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;
> @@ -715,19 +711,15 @@ static void cqspi_chipselect(struct spi_nor *nor)
>        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;
> +     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);
> -     }
> +     /* 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);
> @@ -736,32 +728,6 @@ static void cqspi_chipselect(struct spi_nor *nor)
>        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)
>  {
> @@ -867,18 +833,13 @@ static void cqspi_configure(struct spi_nor *nor)
>        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);
> +             cqspi_chipselect(nor);
>        }
>  
>        /* Setup baudrate divisor and delays */
> @@ -1145,8 +1106,6 @@ 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;
> 

Re: [PATCH 2/6] mtd: spi-nor: cadence-quadspi: Provide a way to disable DAC mode

[Tudor.Ambarus]

On Friday, May 8, 2020 9:54:07 PM EEST Vignesh Raghavendra wrote:
> Currently direct access mode is used on platforms that have AHB window
> (memory mapped window) larger than flash size. This feature is limited
> to TI platforms as non TI platforms have < 1MB of AHB window.
> Therefore introduce a driver quirk to disable DAC mode and set it for
> non TI compatibles. This is in preparation to move to spi-mem framework
> where flash geometry cannot be known.
> 
> Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
> ---
>  drivers/mtd/spi-nor/controllers/cadence-quadspi.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)

Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>