1 files changed, 737 insertions, 0 deletions

diff --git a/drivers/spi/fsl_dspi.c b/drivers/spi/fsl_dspi.c
new file mode 100644
index 0000000000..6476f913c8
--- /dev/null
+++ b/drivers/spi/fsl_dspi.c
@@ -0,0 +1,737 @@
+/*
+ * (C) Copyright 2000-2003
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * Copyright (C) 2004-2009, 2015 Freescale Semiconductor, Inc.
+ * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
+ * Chao Fu (B44548@freescale.com)
+ * Haikun Wang (B53464@freescale.com)
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+#include <dm.h>
+#include <errno.h>
+#include <common.h>
+#include <spi.h>
+#include <malloc.h>
+#include <asm/io.h>
+#include <fdtdec.h>
+#ifndef CONFIG_M68K
+#include <asm/arch/clock.h>
+#endif
+#include <fsl_dspi.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/* fsl_dspi_platdata flags */
+#define DSPI_FLAG_REGMAP_ENDIAN_BIG	(1 << 0)
+
+/* idle data value */
+#define DSPI_IDLE_VAL			0x0
+
+/* max chipselect signals number */
+#define FSL_DSPI_MAX_CHIPSELECT		6
+
+/* default SCK frequency, unit: HZ */
+#define FSL_DSPI_DEFAULT_SCK_FREQ	10000000
+
+/* tx/rx data wait timeout value, unit: us */
+#define DSPI_TXRX_WAIT_TIMEOUT		1000000
+
+/* CTAR register pre-configure value */
+#define DSPI_CTAR_DEFAULT_VALUE		(DSPI_CTAR_TRSZ(7) | \
+					DSPI_CTAR_PCSSCK_1CLK | \
+					DSPI_CTAR_PASC(0) | \
+					DSPI_CTAR_PDT(0) | \
+					DSPI_CTAR_CSSCK(0) | \
+					DSPI_CTAR_ASC(0) | \
+					DSPI_CTAR_DT(0))
+
+/* CTAR register pre-configure mask */
+#define DSPI_CTAR_SET_MODE_MASK		(DSPI_CTAR_TRSZ(15) | \
+					DSPI_CTAR_PCSSCK(3) | \
+					DSPI_CTAR_PASC(3) | \
+					DSPI_CTAR_PDT(3) | \
+					DSPI_CTAR_CSSCK(15) | \
+					DSPI_CTAR_ASC(15) | \
+					DSPI_CTAR_DT(15))
+
+/**
+ * struct fsl_dspi_platdata - platform data for Freescale DSPI
+ *
+ * @flags: Flags for DSPI DSPI_FLAG_...
+ * @speed_hz: Default SCK frequency
+ * @num_chipselect: Number of DSPI chipselect signals
+ * @regs_addr: Base address of DSPI registers
+ */
+struct fsl_dspi_platdata {
+	uint flags;
+	uint speed_hz;
+	uint num_chipselect;
+	fdt_addr_t regs_addr;
+};
+
+/**
+ * struct fsl_dspi_priv - private data for Freescale DSPI
+ *
+ * @flags: Flags for DSPI DSPI_FLAG_...
+ * @mode: SPI mode to use for slave device (see SPI mode flags)
+ * @mcr_val: MCR register configure value
+ * @bus_clk: DSPI input clk frequency
+ * @speed_hz: Default SCK frequency
+ * @charbit: How many bits in every transfer
+ * @num_chipselect: Number of DSPI chipselect signals
+ * @ctar_val: CTAR register configure value of per chipselect slave device
+ * @regs: Point to DSPI register structure for I/O access
+ */
+struct fsl_dspi_priv {
+	uint flags;
+	uint mode;
+	uint mcr_val;
+	uint bus_clk;
+	uint speed_hz;
+	uint charbit;
+	uint num_chipselect;
+	uint ctar_val[FSL_DSPI_MAX_CHIPSELECT];
+	struct dspi *regs;
+};
+
+#ifndef CONFIG_DM_SPI
+struct fsl_dspi {
+	struct spi_slave slave;
+	struct fsl_dspi_priv priv;
+};
+#endif
+
+__weak void cpu_dspi_port_conf(void)
+{
+}
+
+__weak int cpu_dspi_claim_bus(uint bus, uint cs)
+{
+	return 0;
+}
+
+__weak void cpu_dspi_release_bus(uint bus, uint cs)
+{
+}
+
+static uint dspi_read32(uint flags, uint *addr)
+{
+	return flags & DSPI_FLAG_REGMAP_ENDIAN_BIG ?
+		in_be32(addr) : in_le32(addr);
+}
+
+static void dspi_write32(uint flags, uint *addr, uint val)
+{
+	flags & DSPI_FLAG_REGMAP_ENDIAN_BIG ?
+		out_be32(addr, val) : out_le32(addr, val);
+}
+
+static void dspi_halt(struct fsl_dspi_priv *priv, u8 halt)
+{
+	uint mcr_val;
+
+	mcr_val = dspi_read32(priv->flags, &priv->regs->mcr);
+
+	if (halt)
+		mcr_val |= DSPI_MCR_HALT;
+	else
+		mcr_val &= ~DSPI_MCR_HALT;
+
+	dspi_write32(priv->flags, &priv->regs->mcr, mcr_val);
+}
+
+static void fsl_dspi_init_mcr(struct fsl_dspi_priv *priv, uint cfg_val)
+{
+	/* halt DSPI module */
+	dspi_halt(priv, 1);
+
+	dspi_write32(priv->flags, &priv->regs->mcr, cfg_val);
+
+	/* resume module */
+	dspi_halt(priv, 0);
+
+	priv->mcr_val = cfg_val;
+}
+
+static void fsl_dspi_cfg_cs_active_state(struct fsl_dspi_priv *priv,
+		uint cs, uint state)
+{
+	uint mcr_val;
+
+	dspi_halt(priv, 1);
+
+	mcr_val = dspi_read32(priv->flags, &priv->regs->mcr);
+	if (state & SPI_CS_HIGH)
+		/* CSx inactive state is low */
+		mcr_val &= ~DSPI_MCR_PCSIS(cs);
+	else
+		/* CSx inactive state is high */
+		mcr_val |= DSPI_MCR_PCSIS(cs);
+	dspi_write32(priv->flags, &priv->regs->mcr, mcr_val);
+
+	dspi_halt(priv, 0);
+}
+
+static int fsl_dspi_cfg_ctar_mode(struct fsl_dspi_priv *priv,
+		uint cs, uint mode)
+{
+	uint bus_setup;
+
+	bus_setup = dspi_read32(priv->flags, &priv->regs->ctar[0]);
+
+	bus_setup &= ~DSPI_CTAR_SET_MODE_MASK;
+	bus_setup |= priv->ctar_val[cs];
+	bus_setup &= ~(DSPI_CTAR_CPOL | DSPI_CTAR_CPHA | DSPI_CTAR_LSBFE);
+
+	if (mode & SPI_CPOL)
+		bus_setup |= DSPI_CTAR_CPOL;
+	if (mode & SPI_CPHA)
+		bus_setup |= DSPI_CTAR_CPHA;
+	if (mode & SPI_LSB_FIRST)
+		bus_setup |= DSPI_CTAR_LSBFE;
+
+	dspi_write32(priv->flags, &priv->regs->ctar[0], bus_setup);
+
+	priv->charbit =
+		((dspi_read32(priv->flags, &priv->regs->ctar[0]) &
+		  DSPI_CTAR_TRSZ(15)) == DSPI_CTAR_TRSZ(15)) ? 16 : 8;
+
+	return 0;
+}
+
+static void fsl_dspi_clr_fifo(struct fsl_dspi_priv *priv)
+{
+	uint mcr_val;
+
+	dspi_halt(priv, 1);
+	mcr_val = dspi_read32(priv->flags, &priv->regs->mcr);
+	/* flush RX and TX FIFO */
+	mcr_val |= (DSPI_MCR_CTXF | DSPI_MCR_CRXF);
+	dspi_write32(priv->flags, &priv->regs->mcr, mcr_val);
+	dspi_halt(priv, 0);
+}
+
+static void dspi_tx(struct fsl_dspi_priv *priv, u32 ctrl, u16 data)
+{
+	int timeout = DSPI_TXRX_WAIT_TIMEOUT;
+
+	/* wait for empty entries in TXFIFO or timeout */
+	while (DSPI_SR_TXCTR(dspi_read32(priv->flags, &priv->regs->sr)) >= 4 &&
+			timeout--)
+		udelay(1);
+
+	if (timeout >= 0)
+		dspi_write32(priv->flags, &priv->regs->tfr, (ctrl | data));
+	else
+		debug("dspi_tx: waiting timeout!\n");
+}
+
+static u16 dspi_rx(struct fsl_dspi_priv *priv)
+{
+	int timeout = DSPI_TXRX_WAIT_TIMEOUT;
+
+	/* wait for valid entries in RXFIFO or timeout */
+	while (DSPI_SR_RXCTR(dspi_read32(priv->flags, &priv->regs->sr)) == 0 &&
+			timeout--)
+		udelay(1);
+
+	if (timeout >= 0)
+		return (u16)DSPI_RFR_RXDATA(
+				dspi_read32(priv->flags, &priv->regs->rfr));
+	else {
+		debug("dspi_rx: waiting timeout!\n");
+		return (u16)(~0);
+	}
+}
+
+static int dspi_xfer(struct fsl_dspi_priv *priv, uint cs, unsigned int bitlen,
+		const void *dout, void *din, unsigned long flags)
+{
+	u16 *spi_rd16 = NULL, *spi_wr16 = NULL;
+	u8 *spi_rd = NULL, *spi_wr = NULL;
+	static u32 ctrl;
+	uint len = bitlen >> 3;
+
+	if (priv->charbit == 16) {
+		bitlen >>= 1;
+		spi_wr16 = (u16 *)dout;
+		spi_rd16 = (u16 *)din;
+	} else {
+		spi_wr = (u8 *)dout;
+		spi_rd = (u8 *)din;
+	}
+
+	if ((flags & SPI_XFER_BEGIN) == SPI_XFER_BEGIN)
+		ctrl |= DSPI_TFR_CONT;
+
+	ctrl = ctrl & DSPI_TFR_CONT;
+	ctrl = ctrl | DSPI_TFR_CTAS(0) | DSPI_TFR_PCS(cs);
+
+	if (len > 1) {
+		int tmp_len = len - 1;
+		while (tmp_len--) {
+			if (dout != NULL) {
+				if (priv->charbit == 16)
+					dspi_tx(priv, ctrl, *spi_wr16++);
+				else
+					dspi_tx(priv, ctrl, *spi_wr++);
+				dspi_rx(priv);
+			}
+
+			if (din != NULL) {
+				dspi_tx(priv, ctrl, DSPI_IDLE_VAL);
+				if (priv->charbit == 16)
+					*spi_rd16++ = dspi_rx(priv);
+				else
+					*spi_rd++ = dspi_rx(priv);
+			}
+		}
+
+		len = 1;	/* remaining byte */
+	}
+
+	if ((flags & SPI_XFER_END) == SPI_XFER_END)
+		ctrl &= ~DSPI_TFR_CONT;
+
+	if (len) {
+		if (dout != NULL) {
+			if (priv->charbit == 16)
+				dspi_tx(priv, ctrl, *spi_wr16);
+			else
+				dspi_tx(priv, ctrl, *spi_wr);
+			dspi_rx(priv);
+		}
+
+		if (din != NULL) {
+			dspi_tx(priv, ctrl, DSPI_IDLE_VAL);
+			if (priv->charbit == 16)
+				*spi_rd16 = dspi_rx(priv);
+			else
+				*spi_rd = dspi_rx(priv);
+		}
+	} else {
+		/* dummy read */
+		dspi_tx(priv, ctrl, DSPI_IDLE_VAL);
+		dspi_rx(priv);
+	}
+
+	return 0;
+}
+
+/**
+ * Calculate the divide value between input clk frequency and expected SCK frequency
+ * Formula: SCK = (clkrate/pbr) x ((1+dbr)/br)
+ * Dbr: use default value 0
+ *
+ * @pbr: return Baud Rate Prescaler value
+ * @br: return Baud Rate Scaler value
+ * @speed_hz: expected SCK frequency
+ * @clkrate: input clk frequency
+ */
+static int fsl_dspi_hz_to_spi_baud(int *pbr, int *br,
+		int speed_hz, uint clkrate)
+{
+	/* Valid baud rate pre-scaler values */
+	int pbr_tbl[4] = {2, 3, 5, 7};
+	int brs[16] = {2, 4, 6, 8,
+		16, 32, 64, 128,
+		256, 512, 1024, 2048,
+		4096, 8192, 16384, 32768};
+	int temp, i = 0, j = 0;
+
+	temp = clkrate / speed_hz;
+
+	for (i = 0; i < ARRAY_SIZE(pbr_tbl); i++)
+		for (j = 0; j < ARRAY_SIZE(brs); j++) {
+			if (pbr_tbl[i] * brs[j] >= temp) {
+				*pbr = i;
+				*br = j;
+				return 0;
+			}
+		}
+
+	debug("Can not find valid baud rate,speed_hz is %d, ", speed_hz);
+	debug("clkrate is %d, we use the max prescaler value.\n", clkrate);
+
+	*pbr = ARRAY_SIZE(pbr_tbl) - 1;
+	*br =  ARRAY_SIZE(brs) - 1;
+	return -EINVAL;
+}
+
+static int fsl_dspi_cfg_speed(struct fsl_dspi_priv *priv, uint speed)
+{
+	int ret;
+	uint bus_setup;
+	int best_i, best_j, bus_clk;
+
+	bus_clk = priv->bus_clk;
+
+	debug("DSPI set_speed: expected SCK speed %u, bus_clk %u.\n",
+	      speed, bus_clk);
+
+	bus_setup = dspi_read32(priv->flags, &priv->regs->ctar[0]);
+	bus_setup &= ~(DSPI_CTAR_DBR | DSPI_CTAR_PBR(0x3) | DSPI_CTAR_BR(0xf));
+
+	ret = fsl_dspi_hz_to_spi_baud(&best_i, &best_j, speed, bus_clk);
+	if (ret) {
+		speed = priv->speed_hz;
+		debug("DSPI set_speed use default SCK rate %u.\n", speed);
+		fsl_dspi_hz_to_spi_baud(&best_i, &best_j, speed, bus_clk);
+	}
+
+	bus_setup |= (DSPI_CTAR_PBR(best_i) | DSPI_CTAR_BR(best_j));
+	dspi_write32(priv->flags, &priv->regs->ctar[0], bus_setup);
+
+	priv->speed_hz = speed;
+
+	return 0;
+}
+#ifndef CONFIG_DM_SPI
+void spi_init(void)
+{
+	/* Nothing to do */
+}
+
+void spi_init_f(void)
+{
+	/* Nothing to do */
+}
+
+void spi_init_r(void)
+{
+	/* Nothing to do */
+}
+
+int spi_cs_is_valid(unsigned int bus, unsigned int cs)
+{
+	if (((cs >= 0) && (cs < 8)) && ((bus >= 0) && (bus < 8)))
+		return 1;
+	else
+		return 0;
+}
+
+struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
+				  unsigned int max_hz, unsigned int mode)
+{
+	struct fsl_dspi *dspi;
+	uint mcr_cfg_val;
+
+	dspi = spi_alloc_slave(struct fsl_dspi, bus, cs);
+	if (!dspi)
+		return NULL;
+
+	cpu_dspi_port_conf();
+
+#ifdef CONFIG_SYS_FSL_DSPI_BE
+	dspi->priv.flags |= DSPI_FLAG_REGMAP_ENDIAN_BIG;
+#endif
+
+	dspi->priv.regs = (struct dspi *)MMAP_DSPI;
+
+#ifdef CONFIG_M68K
+	dspi->priv.bus_clk = gd->bus_clk;
+#else
+	dspi->priv.bus_clk = mxc_get_clock(MXC_DSPI_CLK);
+#endif
+	dspi->priv.speed_hz = FSL_DSPI_DEFAULT_SCK_FREQ;
+
+	/* default: all CS signals inactive state is high */
+	mcr_cfg_val = DSPI_MCR_MSTR | DSPI_MCR_PCSIS_MASK |
+		DSPI_MCR_CRXF | DSPI_MCR_CTXF;
+	fsl_dspi_init_mcr(&dspi->priv, mcr_cfg_val);
+
+	for (i = 0; i < FSL_DSPI_MAX_CHIPSELECT; i++)
+		dspi->priv.ctar_val[i] = DSPI_CTAR_DEFAULT_VALUE;
+
+#ifdef CONFIG_SYS_DSPI_CTAR0
+	if (FSL_DSPI_MAX_CHIPSELECT > 0)
+		dspi->priv.ctar_val[0] = CONFIG_SYS_DSPI_CTAR0;
+#endif
+#ifdef CONFIG_SYS_DSPI_CTAR1
+	if (FSL_DSPI_MAX_CHIPSELECT > 1)
+		dspi->priv.ctar_val[1] = CONFIG_SYS_DSPI_CTAR1;
+#endif
+#ifdef CONFIG_SYS_DSPI_CTAR2
+	if (FSL_DSPI_MAX_CHIPSELECT > 2)
+		dspi->priv.ctar_val[2] = CONFIG_SYS_DSPI_CTAR2;
+#endif
+#ifdef CONFIG_SYS_DSPI_CTAR3
+	if (FSL_DSPI_MAX_CHIPSELECT > 3)
+		dspi->priv.ctar_val[3] = CONFIG_SYS_DSPI_CTAR3;
+#endif
+#ifdef CONFIG_SYS_DSPI_CTAR4
+	if (FSL_DSPI_MAX_CHIPSELECT > 4)
+		dspi->priv.ctar_val[4] = CONFIG_SYS_DSPI_CTAR4;
+#endif
+#ifdef CONFIG_SYS_DSPI_CTAR5
+	if (FSL_DSPI_MAX_CHIPSELECT > 5)
+		dspi->priv.ctar_val[5] = CONFIG_SYS_DSPI_CTAR5;
+#endif
+#ifdef CONFIG_SYS_DSPI_CTAR6
+	if (FSL_DSPI_MAX_CHIPSELECT > 6)
+		dspi->priv.ctar_val[6] = CONFIG_SYS_DSPI_CTAR6;
+#endif
+#ifdef CONFIG_SYS_DSPI_CTAR7
+	if (FSL_DSPI_MAX_CHIPSELECT > 7)
+		dspi->priv.ctar_val[7] = CONFIG_SYS_DSPI_CTAR7;
+#endif
+
+	fsl_dspi_cfg_speed(&dspi->priv, max_hz);
+
+	/* configure transfer mode */
+	fsl_dspi_cfg_ctar_mode(&dspi->priv, cs, mode);
+
+	/* configure active state of CSX */
+	fsl_dspi_cfg_cs_active_state(&dspi->priv, cs, mode);
+
+	return &dspi->slave;
+}
+
+void spi_free_slave(struct spi_slave *slave)
+{
+	free(slave);
+}
+
+int spi_claim_bus(struct spi_slave *slave)
+{
+	uint sr_val;
+	struct fsl_dspi *dspi = (struct fsl_dspi *)slave;
+
+	cpu_dspi_claim_bus(slave->bus, slave->cs);
+
+	fsl_dspi_clr_fifo(&dspi->priv);
+
+	/* check module TX and RX status */
+	sr_val = dspi_read32(dspi->priv.flags, &dspi->priv.regs->sr);
+	if ((sr_val & DSPI_SR_TXRXS) != DSPI_SR_TXRXS) {
+		debug("DSPI RX/TX not ready!\n");
+		return -EIO;
+	}
+
+	return 0;
+}
+
+void spi_release_bus(struct spi_slave *slave)
+{
+	struct fsl_dspi *dspi = (struct fsl_dspi *)slave;
+
+	dspi_halt(&dspi->priv, 1);
+	cpu_dspi_release_bus(slave->bus.slave->cs);
+}
+
+int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout,
+	     void *din, unsigned long flags)
+{
+	struct fsl_dspi *dspi = (struct fsl_dspi *)slave;
+	return dspi_xfer(&dspi->priv, slave->cs, bitlen, dout, din, flags);
+}
+#else
+static int fsl_dspi_child_pre_probe(struct udevice *dev)
+{
+	struct dm_spi_slave_platdata *slave_plat = dev_get_parent_platdata(dev);
+	struct fsl_dspi_priv *priv = dev_get_priv(dev->parent);
+
+	if (slave_plat->cs >= priv->num_chipselect) {
+		debug("DSPI invalid chipselect number %d(max %d)!\n",
+		      slave_plat->cs, priv->num_chipselect - 1);
+		return -EINVAL;
+	}
+
+	priv->ctar_val[slave_plat->cs] = DSPI_CTAR_DEFAULT_VALUE;
+
+	debug("DSPI pre_probe slave device on CS %u, max_hz %u, mode 0x%x.\n",
+	      slave_plat->cs, slave_plat->max_hz, slave_plat->mode);
+
+	return 0;
+}
+
+static int fsl_dspi_probe(struct udevice *bus)
+{
+	struct fsl_dspi_platdata *plat = dev_get_platdata(bus);
+	struct fsl_dspi_priv *priv = dev_get_priv(bus);
+	struct dm_spi_bus *dm_spi_bus;
+	uint mcr_cfg_val;
+
+	dm_spi_bus = bus->uclass_priv;
+
+	/* cpu speical pin muxing configure */
+	cpu_dspi_port_conf();
+
+	/* get input clk frequency */
+	priv->regs = (struct dspi *)plat->regs_addr;
+	priv->flags = plat->flags;
+#ifdef CONFIG_M68K
+	priv->bus_clk = gd->bus_clk;
+#else
+	priv->bus_clk = mxc_get_clock(MXC_DSPI_CLK);
+#endif
+	priv->num_chipselect = plat->num_chipselect;
+	priv->speed_hz = plat->speed_hz;
+	/* frame data length in bits, default 8bits */
+	priv->charbit = 8;
+
+	dm_spi_bus->max_hz = plat->speed_hz;
+
+	/* default: all CS signals inactive state is high */
+	mcr_cfg_val = DSPI_MCR_MSTR | DSPI_MCR_PCSIS_MASK |
+		DSPI_MCR_CRXF | DSPI_MCR_CTXF;
+	fsl_dspi_init_mcr(priv, mcr_cfg_val);
+
+	debug("%s probe done, bus-num %d.\n", bus->name, bus->seq);
+
+	return 0;
+}
+
+static int fsl_dspi_claim_bus(struct udevice *dev)
+{
+	uint sr_val;
+	struct fsl_dspi_priv *priv;
+	struct udevice *bus = dev->parent;
+	struct dm_spi_slave_platdata *slave_plat =
+		dev_get_parent_platdata(dev);
+
+	priv = dev_get_priv(bus);
+
+	/* processor special prepartion work */
+	cpu_dspi_claim_bus(bus->seq, slave_plat->cs);
+
+	/* configure transfer mode */
+	fsl_dspi_cfg_ctar_mode(priv, slave_plat->cs, priv->mode);
+
+	/* configure active state of CSX */
+	fsl_dspi_cfg_cs_active_state(priv, slave_plat->cs,
+				     priv->mode);
+
+	fsl_dspi_clr_fifo(priv);
+
+	/* check module TX and RX status */
+	sr_val = dspi_read32(priv->flags, &priv->regs->sr);
+	if ((sr_val & DSPI_SR_TXRXS) != DSPI_SR_TXRXS) {
+		debug("DSPI RX/TX not ready!\n");
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static int fsl_dspi_release_bus(struct udevice *dev)
+{
+	struct udevice *bus = dev->parent;
+	struct fsl_dspi_priv *priv = dev_get_priv(bus);
+	struct dm_spi_slave_platdata *slave_plat =
+		dev_get_parent_platdata(dev);
+
+	/* halt module */
+	dspi_halt(priv, 1);
+
+	/* processor special release work */
+	cpu_dspi_release_bus(bus->seq, slave_plat->cs);
+
+	return 0;
+}
+
+/**
+ * This function doesn't do anything except help with debugging
+ */
+static int fsl_dspi_bind(struct udevice *bus)
+{
+	debug("%s assigned req_seq %d.\n", bus->name, bus->req_seq);
+	return 0;
+}
+
+static int fsl_dspi_ofdata_to_platdata(struct udevice *bus)
+{
+	fdt_addr_t addr;
+	struct fsl_dspi_platdata *plat = bus->platdata;
+	const void *blob = gd->fdt_blob;
+	int node = bus->of_offset;
+
+	if (fdtdec_get_bool(blob, node, "big-endian"))
+		plat->flags |= DSPI_FLAG_REGMAP_ENDIAN_BIG;
+
+	plat->num_chipselect =
+		fdtdec_get_int(blob, node, "num-cs", FSL_DSPI_MAX_CHIPSELECT);
+
+	addr = fdtdec_get_addr(blob, node, "reg");
+	if (addr == FDT_ADDR_T_NONE) {
+		debug("DSPI: Can't get base address or size\n");
+		return -ENOMEM;
+	}
+	plat->regs_addr = addr;
+
+	plat->speed_hz = fdtdec_get_int(blob,
+			node, "spi-max-frequency", FSL_DSPI_DEFAULT_SCK_FREQ);
+
+	debug("DSPI: regs=0x%x, max-frequency=%d, endianess=%s, num-cs=%d\n",
+	      plat->regs_addr, plat->speed_hz,
+	      plat->flags & DSPI_FLAG_REGMAP_ENDIAN_BIG ? "be" : "le",
+	      plat->num_chipselect);
+
+	return 0;
+}
+
+static int fsl_dspi_xfer(struct udevice *dev, unsigned int bitlen,
+		const void *dout, void *din, unsigned long flags)
+{
+	struct fsl_dspi_priv *priv;
+	struct dm_spi_slave_platdata *slave_plat = dev_get_parent_platdata(dev);
+	struct udevice *bus;
+
+	bus = dev->parent;
+	priv = dev_get_priv(bus);
+
+	return dspi_xfer(priv, slave_plat->cs, bitlen, dout, din, flags);
+}
+
+static int fsl_dspi_set_speed(struct udevice *bus, uint speed)
+{
+	struct fsl_dspi_priv *priv = dev_get_priv(bus);
+
+	return fsl_dspi_cfg_speed(priv, speed);
+}
+
+static int fsl_dspi_set_mode(struct udevice *bus, uint mode)
+{
+	struct fsl_dspi_priv *priv = dev_get_priv(bus);
+
+	debug("DSPI set_mode: mode 0x%x.\n", mode);
+
+	/*
+	 * We store some chipselect special configure value in priv->ctar_val,
+	 * and we can't get the correct chipselect number here,
+	 * so just store mode value.
+	 * Do really configuration when claim_bus.
+	 */
+	priv->mode = mode;
+
+	return 0;
+}
+
+static const struct dm_spi_ops fsl_dspi_ops = {
+	.claim_bus	= fsl_dspi_claim_bus,
+	.release_bus	= fsl_dspi_release_bus,
+	.xfer		= fsl_dspi_xfer,
+	.set_speed	= fsl_dspi_set_speed,
+	.set_mode	= fsl_dspi_set_mode,
+};
+
+static const struct udevice_id fsl_dspi_ids[] = {
+	{ .compatible = "fsl,vf610-dspi" },
+	{ }
+};
+
+U_BOOT_DRIVER(fsl_dspi) = {
+	.name	= "fsl_dspi",
+	.id	= UCLASS_SPI,
+	.of_match = fsl_dspi_ids,
+	.ops	= &fsl_dspi_ops,
+	.ofdata_to_platdata = fsl_dspi_ofdata_to_platdata,
+	.platdata_auto_alloc_size = sizeof(struct fsl_dspi_platdata),
+	.priv_auto_alloc_size = sizeof(struct fsl_dspi_priv),
+	.probe	= fsl_dspi_probe,
+	.child_pre_probe = fsl_dspi_child_pre_probe,
+	.bind = fsl_dspi_bind,
+};
+#endif