drivers: spi: Add SPI controller driver for Octeon

Adds support for SPI controllers found on Octeon II/III and Octeon TX
TX2 SoC platforms.

Signed-off-by: Aaron Williams <awilliams@marvell.com>
Signed-off-by: Suneel Garapati <sgarapati@marvell.com>
Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Cc: Aaron Williams <awilliams@marvell.com>
Cc: Chandrakala Chavva <cchavva@marvell.com>
Cc: Jagan Teki <jagan@amarulasolutions.com>
Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>

3 files changed, 622 insertions, 0 deletions

diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index 30d808d7bb..3fc2d0674a 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -240,6 +240,14 @@ config NXP_FSPI
 	  Enable the NXP FlexSPI (FSPI) driver. This driver can be used to
 	  access the SPI NOR flash on platforms embedding this NXP IP core.
 
+config OCTEON_SPI
+	bool "Octeon SPI driver"
+	depends on DM_PCI && (ARCH_OCTEON || ARCH_OCTEONTX || ARCH_OCTEONTX2)
+	help
+	  Enable the Octeon SPI driver. This driver can be used to
+	  access the SPI NOR flash on Octeon II/III and OcteonTX/TX2
+	  SoC platforms.
+
 config OMAP3_SPI
 	bool "McSPI driver for OMAP"
 	help
diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile
index 4e7461771f..b5c9ff1af8 100644
--- a/drivers/spi/Makefile
+++ b/drivers/spi/Makefile
@@ -43,6 +43,7 @@ obj-$(CONFIG_MXC_SPI) += mxc_spi.o
 obj-$(CONFIG_MXS_SPI) += mxs_spi.o
 obj-$(CONFIG_NXP_FSPI) += nxp_fspi.o
 obj-$(CONFIG_ATCSPI200_SPI) += atcspi200_spi.o
+obj-$(CONFIG_OCTEON_SPI) += octeon_spi.o
 obj-$(CONFIG_OMAP3_SPI) += omap3_spi.o
 obj-$(CONFIG_PIC32_SPI) += pic32_spi.o
 obj-$(CONFIG_PL022_SPI) += pl022_spi.o
diff --git a/drivers/spi/octeon_spi.c b/drivers/spi/octeon_spi.c
new file mode 100644
index 0000000000..83fe6330a1
--- /dev/null
+++ b/drivers/spi/octeon_spi.c
@@ -0,0 +1,613 @@
+// SPDX-License-Identifier:    GPL-2.0
+/*
+ * Copyright (C) 2018 Marvell International Ltd.
+ */
+
+#include <clk.h>
+#include <dm.h>
+#include <malloc.h>
+#include <spi.h>
+#include <spi-mem.h>
+#include <watchdog.h>
+#include <asm/io.h>
+#include <asm/unaligned.h>
+#include <linux/bitfield.h>
+#include <linux/compat.h>
+#include <linux/delay.h>
+
+#define OCTEON_SPI_MAX_BYTES	9
+#define OCTEON_SPI_MAX_CLOCK_HZ	50000000
+
+#define OCTEON_SPI_NUM_CS	4
+
+#define OCTEON_SPI_CS_VALID(cs)	((cs) < OCTEON_SPI_NUM_CS)
+
+#define MPI_CFG			0x0000
+#define MPI_STS			0x0008
+#define MPI_TX			0x0010
+#define MPI_XMIT		0x0018
+#define MPI_WIDE_DAT		0x0040
+#define MPI_IO_CTL		0x0048
+#define MPI_DAT(X)		(0x0080 + ((X) << 3))
+#define MPI_WIDE_BUF(X)		(0x0800 + ((X) << 3))
+#define MPI_CYA_CFG		0x1000
+#define MPI_CLKEN		0x1080
+
+#define MPI_CFG_ENABLE		BIT_ULL(0)
+#define MPI_CFG_IDLELO		BIT_ULL(1)
+#define MPI_CFG_CLK_CONT	BIT_ULL(2)
+#define MPI_CFG_WIREOR		BIT_ULL(3)
+#define MPI_CFG_LSBFIRST	BIT_ULL(4)
+#define MPI_CFG_CS_STICKY	BIT_ULL(5)
+#define MPI_CFG_CSHI		BIT_ULL(7)
+#define MPI_CFG_IDLECLKS	GENMASK_ULL(9, 8)
+#define MPI_CFG_TRITX		BIT_ULL(10)
+#define MPI_CFG_CSLATE		BIT_ULL(11)
+#define MPI_CFG_CSENA0		BIT_ULL(12)
+#define MPI_CFG_CSENA1		BIT_ULL(13)
+#define MPI_CFG_CSENA2		BIT_ULL(14)
+#define MPI_CFG_CSENA3		BIT_ULL(15)
+#define MPI_CFG_CLKDIV		GENMASK_ULL(28, 16)
+#define MPI_CFG_LEGACY_DIS	BIT_ULL(31)
+#define MPI_CFG_IOMODE		GENMASK_ULL(35, 34)
+#define MPI_CFG_TB100_EN	BIT_ULL(49)
+
+#define MPI_DAT_DATA		GENMASK_ULL(7, 0)
+
+#define MPI_STS_BUSY		BIT_ULL(0)
+#define MPI_STS_MPI_INTR	BIT_ULL(1)
+#define MPI_STS_RXNUM		GENMASK_ULL(12, 8)
+
+#define MPI_TX_TOTNUM		GENMASK_ULL(4, 0)
+#define MPI_TX_TXNUM		GENMASK_ULL(12, 8)
+#define MPI_TX_LEAVECS		BIT_ULL(16)
+#define MPI_TX_CSID		GENMASK_ULL(21, 20)
+
+#define MPI_XMIT_TOTNUM		GENMASK_ULL(10, 0)
+#define MPI_XMIT_TXNUM		GENMASK_ULL(30, 20)
+#define MPI_XMIT_BUF_SEL	BIT_ULL(59)
+#define MPI_XMIT_LEAVECS	BIT_ULL(60)
+#define MPI_XMIT_CSID		GENMASK_ULL(62, 61)
+
+/* Used on Octeon TX2 */
+void board_acquire_flash_arb(bool acquire);
+
+/* Local driver data structure */
+struct octeon_spi {
+	void __iomem *base;	/* Register base address */
+	struct clk clk;
+	u32 clkdiv;		/* Clock divisor for device speed */
+};
+
+static u64 octeon_spi_set_mpicfg(struct udevice *dev)
+{
+	struct dm_spi_slave_platdata *slave = dev_get_parent_platdata(dev);
+	struct udevice *bus = dev_get_parent(dev);
+	struct octeon_spi *priv = dev_get_priv(bus);
+	u64 mpi_cfg;
+	uint max_speed = slave->max_hz;
+	bool cpha, cpol;
+
+	if (!max_speed)
+		max_speed = 12500000;
+	if (max_speed > OCTEON_SPI_MAX_CLOCK_HZ)
+		max_speed = OCTEON_SPI_MAX_CLOCK_HZ;
+
+	debug("\n slave params %d %d %d\n", slave->cs,
+	      slave->max_hz, slave->mode);
+	cpha = !!(slave->mode & SPI_CPHA);
+	cpol = !!(slave->mode & SPI_CPOL);
+
+	mpi_cfg = FIELD_PREP(MPI_CFG_CLKDIV, priv->clkdiv & 0x1fff) |
+		FIELD_PREP(MPI_CFG_CSHI, !!(slave->mode & SPI_CS_HIGH)) |
+		FIELD_PREP(MPI_CFG_LSBFIRST, !!(slave->mode & SPI_LSB_FIRST)) |
+		FIELD_PREP(MPI_CFG_WIREOR, !!(slave->mode & SPI_3WIRE)) |
+		FIELD_PREP(MPI_CFG_IDLELO, cpha != cpol) |
+		FIELD_PREP(MPI_CFG_CSLATE, cpha) |
+		MPI_CFG_CSENA0 | MPI_CFG_CSENA1 |
+		MPI_CFG_CSENA2 | MPI_CFG_CSENA1 |
+		MPI_CFG_ENABLE;
+
+	debug("\n mpi_cfg %llx\n", mpi_cfg);
+	return mpi_cfg;
+}
+
+/**
+ * Wait until the SPI bus is ready
+ *
+ * @param	dev	SPI device to wait for
+ */
+static void octeon_spi_wait_ready(struct udevice *dev)
+{
+	struct udevice *bus = dev_get_parent(dev);
+	struct octeon_spi *priv = dev_get_priv(bus);
+	void *base = priv->base;
+	u64 mpi_sts;
+
+	do {
+		mpi_sts = readq(base + MPI_STS);
+		WATCHDOG_RESET();
+	} while (mpi_sts & MPI_STS_BUSY);
+
+	debug("%s(%s)\n", __func__, dev->name);
+}
+
+/**
+ * Claim the bus for a slave device
+ *
+ * @param	dev	SPI bus
+ *
+ * @return	0 for success, -EINVAL if chip select is invalid
+ */
+static int octeon_spi_claim_bus(struct udevice *dev)
+{
+	struct udevice *bus = dev_get_parent(dev);
+	struct octeon_spi *priv = dev_get_priv(bus);
+	void *base = priv->base;
+	u64 mpi_cfg;
+
+	debug("\n\n%s(%s)\n", __func__, dev->name);
+	if (!OCTEON_SPI_CS_VALID(spi_chip_select(dev)))
+		return -EINVAL;
+
+	if (IS_ENABLED(CONFIG_ARCH_OCTEONTX2))
+		board_acquire_flash_arb(true);
+
+	mpi_cfg = readq(base + MPI_CFG);
+	mpi_cfg &= ~MPI_CFG_TRITX;
+	mpi_cfg |= MPI_CFG_ENABLE;
+	writeq(mpi_cfg, base + MPI_CFG);
+	mpi_cfg = readq(base + MPI_CFG);
+	udelay(5);	/** Wait for bus to settle */
+
+	return 0;
+}
+
+/**
+ * Release the bus to a slave device
+ *
+ * @param	dev	SPI bus
+ *
+ * @return	0 for success, -EINVAL if chip select is invalid
+ */
+static int octeon_spi_release_bus(struct udevice *dev)
+{
+	struct udevice *bus = dev_get_parent(dev);
+	struct octeon_spi *priv = dev_get_priv(bus);
+	void *base = priv->base;
+	u64 mpi_cfg;
+
+	debug("%s(%s)\n\n", __func__, dev->name);
+	if (!OCTEON_SPI_CS_VALID(spi_chip_select(dev)))
+		return -EINVAL;
+
+	if (IS_ENABLED(CONFIG_ARCH_OCTEONTX2))
+		board_acquire_flash_arb(false);
+
+	mpi_cfg = readq(base + MPI_CFG);
+	mpi_cfg &= ~MPI_CFG_ENABLE;
+	writeq(mpi_cfg, base + MPI_CFG);
+	mpi_cfg = readq(base + MPI_CFG);
+	udelay(1);
+
+	return 0;
+}
+
+static int octeon_spi_xfer(struct udevice *dev, unsigned int bitlen,
+			   const void *dout, void *din, unsigned long flags)
+{
+	struct udevice *bus = dev_get_parent(dev);
+	struct octeon_spi *priv = dev_get_priv(bus);
+	void *base = priv->base;
+	u64 mpi_tx;
+	u64 mpi_cfg;
+	u64 wide_dat = 0;
+	int len = bitlen / 8;
+	int i;
+	const u8 *tx_data = dout;
+	u8 *rx_data = din;
+	int cs = spi_chip_select(dev);
+
+	if (!OCTEON_SPI_CS_VALID(cs))
+		return -EINVAL;
+
+	debug("\n %s(%s, %u, %p, %p, 0x%lx), cs: %d\n",
+	      __func__, dev->name, bitlen, dout, din, flags, cs);
+
+	mpi_cfg = octeon_spi_set_mpicfg(dev);
+	if (mpi_cfg != readq(base + MPI_CFG)) {
+		writeq(mpi_cfg, base + MPI_CFG);
+		mpi_cfg = readq(base + MPI_CFG);
+		udelay(10);
+	}
+
+	debug("\n mpi_cfg upd %llx\n", mpi_cfg);
+
+	/*
+	 * Start by writing and reading 8 bytes at a time. While we can support
+	 * up to 10, it's easier to just use 8 with the MPI_WIDE_DAT register.
+	 */
+	while (len > 8) {
+		if (tx_data) {
+			wide_dat = get_unaligned((u64 *)tx_data);
+			debug("  tx: %016llx \t", (unsigned long long)wide_dat);
+			tx_data += 8;
+			writeq(wide_dat, base + MPI_WIDE_DAT);
+		}
+
+		mpi_tx = FIELD_PREP(MPI_TX_CSID, cs) |
+			FIELD_PREP(MPI_TX_LEAVECS, 1) |
+			FIELD_PREP(MPI_TX_TXNUM, tx_data ? 8 : 0) |
+			FIELD_PREP(MPI_TX_TOTNUM, 8);
+		writeq(mpi_tx, base + MPI_TX);
+
+		octeon_spi_wait_ready(dev);
+
+		debug("\n ");
+
+		if (rx_data) {
+			wide_dat = readq(base + MPI_WIDE_DAT);
+			debug("  rx: %016llx\t", (unsigned long long)wide_dat);
+			*(u64 *)rx_data = wide_dat;
+			rx_data += 8;
+		}
+		len -= 8;
+	}
+
+	debug("\n ");
+
+	/* Write and read the rest of the data */
+	if (tx_data) {
+		for (i = 0; i < len; i++) {
+			debug("  tx: %02x\n", *tx_data);
+			writeq(*tx_data++, base + MPI_DAT(i));
+		}
+	}
+
+	mpi_tx = FIELD_PREP(MPI_TX_CSID, cs) |
+		FIELD_PREP(MPI_TX_LEAVECS, !(flags & SPI_XFER_END)) |
+		FIELD_PREP(MPI_TX_TXNUM, tx_data ? len : 0) |
+		FIELD_PREP(MPI_TX_TOTNUM, len);
+	writeq(mpi_tx, base + MPI_TX);
+
+	octeon_spi_wait_ready(dev);
+
+	debug("\n ");
+
+	if (rx_data) {
+		for (i = 0; i < len; i++) {
+			*rx_data = readq(base + MPI_DAT(i)) & 0xff;
+			debug("  rx: %02x\n", *rx_data);
+			rx_data++;
+		}
+	}
+
+	return 0;
+}
+
+static int octeontx2_spi_xfer(struct udevice *dev, unsigned int bitlen,
+			      const void *dout, void *din, unsigned long flags)
+{
+	struct udevice *bus = dev_get_parent(dev);
+	struct octeon_spi *priv = dev_get_priv(bus);
+	void *base = priv->base;
+	u64 mpi_xmit;
+	u64 mpi_cfg;
+	u64 wide_dat = 0;
+	int len = bitlen / 8;
+	int rem;
+	int i;
+	const u8 *tx_data = dout;
+	u8 *rx_data = din;
+	int cs = spi_chip_select(dev);
+
+	if (!OCTEON_SPI_CS_VALID(cs))
+		return -EINVAL;
+
+	debug("\n %s(%s, %u, %p, %p, 0x%lx), cs: %d\n",
+	      __func__, dev->name, bitlen, dout, din, flags, cs);
+
+	mpi_cfg = octeon_spi_set_mpicfg(dev);
+
+	mpi_cfg |= MPI_CFG_TRITX | MPI_CFG_LEGACY_DIS | MPI_CFG_CS_STICKY |
+		MPI_CFG_TB100_EN;
+
+	mpi_cfg &= ~MPI_CFG_IOMODE;
+	if (flags & (SPI_TX_DUAL | SPI_RX_DUAL))
+		mpi_cfg |= FIELD_PREP(MPI_CFG_IOMODE, 2);
+	if (flags & (SPI_TX_QUAD | SPI_RX_QUAD))
+		mpi_cfg |= FIELD_PREP(MPI_CFG_IOMODE, 3);
+
+	if (mpi_cfg != readq(base + MPI_CFG)) {
+		writeq(mpi_cfg, base + MPI_CFG);
+		mpi_cfg = readq(base + MPI_CFG);
+		udelay(10);
+	}
+
+	debug("\n mpi_cfg upd %llx\n\n", mpi_cfg);
+
+	/* Start by writing or reading 1024 bytes at a time. */
+	while (len > 1024) {
+		if (tx_data) {
+			/* 8 bytes per iteration */
+			for (i = 0; i < 128; i++) {
+				wide_dat = get_unaligned((u64 *)tx_data);
+				debug("  tx: %016llx \t",
+				      (unsigned long long)wide_dat);
+				if ((i % 4) == 3)
+					debug("\n");
+				tx_data += 8;
+				writeq(wide_dat, base + MPI_WIDE_BUF(i));
+			}
+		}
+
+		mpi_xmit = FIELD_PREP(MPI_XMIT_CSID, cs) | MPI_XMIT_LEAVECS |
+			FIELD_PREP(MPI_XMIT_TXNUM, tx_data ? 1024 : 0) |
+			FIELD_PREP(MPI_XMIT_TOTNUM, 1024);
+		writeq(mpi_xmit, base + MPI_XMIT);
+
+		octeon_spi_wait_ready(dev);
+
+		debug("\n ");
+
+		if (rx_data) {
+			/* 8 bytes per iteration */
+			for (i = 0; i < 128; i++) {
+				wide_dat = readq(base + MPI_WIDE_BUF(i));
+				debug("  rx: %016llx\t",
+				      (unsigned long long)wide_dat);
+				if ((i % 4) == 3)
+					debug("\n");
+				*(u64 *)rx_data = wide_dat;
+				rx_data += 8;
+			}
+		}
+		len -= 1024;
+	}
+
+	if (tx_data) {
+		rem = len % 8;
+		/* 8 bytes per iteration */
+		for (i = 0; i < len / 8; i++) {
+			wide_dat = get_unaligned((u64 *)tx_data);
+			debug("  tx: %016llx \t",
+			      (unsigned long long)wide_dat);
+			if ((i % 4) == 3)
+				debug("\n");
+			tx_data += 8;
+			writeq(wide_dat, base + MPI_WIDE_BUF(i));
+		}
+		if (rem) {
+			memcpy(&wide_dat, tx_data, rem);
+			debug("  rtx: %016llx\t", wide_dat);
+			writeq(wide_dat, base + MPI_WIDE_BUF(i));
+		}
+	}
+
+	mpi_xmit = FIELD_PREP(MPI_XMIT_CSID, cs) |
+		FIELD_PREP(MPI_XMIT_LEAVECS, !(flags & SPI_XFER_END)) |
+		FIELD_PREP(MPI_XMIT_TXNUM, tx_data ? len : 0) |
+		FIELD_PREP(MPI_XMIT_TOTNUM, len);
+	writeq(mpi_xmit, base + MPI_XMIT);
+
+	octeon_spi_wait_ready(dev);
+
+	debug("\n ");
+
+	if (rx_data) {
+		rem = len % 8;
+		/* 8 bytes per iteration */
+		for (i = 0; i < len / 8; i++) {
+			wide_dat = readq(base + MPI_WIDE_BUF(i));
+			debug("  rx: %016llx\t",
+			      (unsigned long long)wide_dat);
+			if ((i % 4) == 3)
+				debug("\n");
+			*(u64 *)rx_data = wide_dat;
+			rx_data += 8;
+		}
+		if (rem) {
+			wide_dat = readq(base + MPI_WIDE_BUF(i));
+			debug("  rrx: %016llx\t",
+			      (unsigned long long)wide_dat);
+			memcpy(rx_data, &wide_dat, rem);
+			rx_data += rem;
+		}
+	}
+
+	return 0;
+}
+
+static bool octeon_spi_supports_op(struct spi_slave *slave,
+				   const struct spi_mem_op *op)
+{
+	/* For now, support only below combinations
+	 * 1-1-1
+	 * 1-1-2 1-2-2
+	 * 1-1-4 1-4-4
+	 */
+	if (op->cmd.buswidth != 1)
+		return false;
+	return true;
+}
+
+static int octeon_spi_exec_op(struct spi_slave *slave,
+			      const struct spi_mem_op *op)
+{
+	unsigned long flags = SPI_XFER_BEGIN;
+	const void *tx;
+	void *rx;
+	u8 opcode, *buf;
+	u8 *addr;
+	int i, temp, ret;
+
+	if (op->cmd.buswidth != 1)
+		return -ENOTSUPP;
+
+	/* Send CMD */
+	i = 0;
+	opcode = op->cmd.opcode;
+
+	if (!op->data.nbytes && !op->addr.nbytes && !op->dummy.nbytes)
+		flags |= SPI_XFER_END;
+
+	ret = octeontx2_spi_xfer(slave->dev, 8, (void *)&opcode, NULL, flags);
+	if (ret < 0)
+		return ret;
+
+	/* Send Address and dummy */
+	if (op->addr.nbytes) {
+		/* Alloc buffer for address+dummy */
+		buf = (u8 *)calloc(1, op->addr.nbytes + op->dummy.nbytes);
+		if (!buf) {
+			printf("%s Out of memory\n", __func__);
+			return -ENOMEM;
+		}
+		addr = (u8 *)&op->addr.val;
+		for (temp = 0; temp < op->addr.nbytes; temp++)
+			buf[i++] = *(u8 *)(addr + op->addr.nbytes - 1 - temp);
+		for (temp = 0; temp < op->dummy.nbytes; temp++)
+			buf[i++] = 0xff;
+		if (op->addr.buswidth == 2)
+			flags |= SPI_RX_DUAL;
+		if (op->addr.buswidth == 4)
+			flags |= SPI_RX_QUAD;
+
+		if (!op->data.nbytes)
+			flags |= SPI_XFER_END;
+		ret = octeontx2_spi_xfer(slave->dev, i * 8, (void *)buf, NULL,
+					 flags);
+		free(buf);
+		if (ret < 0)
+			return ret;
+	}
+	if (!op->data.nbytes)
+		return 0;
+
+	/* Send/Receive Data */
+	flags |= SPI_XFER_END;
+	if (op->data.buswidth == 2)
+		flags |= SPI_RX_DUAL;
+	if (op->data.buswidth == 4)
+		flags |= SPI_RX_QUAD;
+
+	rx = (op->data.dir == SPI_MEM_DATA_IN) ? op->data.buf.in : NULL;
+	tx = (op->data.dir == SPI_MEM_DATA_OUT) ? op->data.buf.out : NULL;
+
+	ret = octeontx2_spi_xfer(slave->dev, (op->data.nbytes * 8), tx, rx,
+				 flags);
+	return ret;
+}
+
+static const struct spi_controller_mem_ops octeontx2_spi_mem_ops = {
+	.supports_op = octeon_spi_supports_op,
+	.exec_op = octeon_spi_exec_op,
+};
+
+/**
+ * Set the speed of the SPI bus
+ *
+ * @param	bus	bus to set
+ * @param	max_hz	maximum speed supported
+ */
+static int octeon_spi_set_speed(struct udevice *bus, uint max_hz)
+{
+	struct octeon_spi *priv = dev_get_priv(bus);
+	ulong clk_rate;
+	u32 calc_hz;
+
+	if (max_hz > OCTEON_SPI_MAX_CLOCK_HZ)
+		max_hz = OCTEON_SPI_MAX_CLOCK_HZ;
+
+	clk_rate = clk_get_rate(&priv->clk);
+	if (IS_ERR_VALUE(clk_rate))
+		return -EINVAL;
+
+	debug("%s(%s, %u, %lu)\n", __func__, bus->name, max_hz, clk_rate);
+
+	priv->clkdiv = clk_rate / (2 * max_hz);
+	while (1) {
+		calc_hz = clk_rate / (2 * priv->clkdiv);
+		if (calc_hz <= max_hz)
+			break;
+		priv->clkdiv += 1;
+	}
+
+	if (priv->clkdiv > 8191)
+		return -EINVAL;
+
+	debug("%s: clkdiv=%d\n", __func__, priv->clkdiv);
+
+	return 0;
+}
+
+static int octeon_spi_set_mode(struct udevice *bus, uint mode)
+{
+	/* We don't set it here */
+	return 0;
+}
+
+static struct dm_spi_ops octeon_spi_ops = {
+	.claim_bus	= octeon_spi_claim_bus,
+	.release_bus	= octeon_spi_release_bus,
+	.set_speed	= octeon_spi_set_speed,
+	.set_mode	= octeon_spi_set_mode,
+	.xfer		= octeon_spi_xfer,
+};
+
+static int octeon_spi_probe(struct udevice *dev)
+{
+	struct octeon_spi *priv = dev_get_priv(dev);
+	int ret;
+
+	/* Octeon TX & TX2 use PCI based probing */
+	if (device_is_compatible(dev, "cavium,thunder-8190-spi")) {
+		pci_dev_t bdf = dm_pci_get_bdf(dev);
+
+		debug("SPI PCI device: %x\n", bdf);
+		priv->base = dm_pci_map_bar(dev, PCI_BASE_ADDRESS_0,
+					    PCI_REGION_MEM);
+		/* Add base offset */
+		priv->base += 0x1000;
+
+		/*
+		 * Octeon TX2 needs a different xfer function and supports
+		 * mem_ops
+		 */
+		if (device_is_compatible(dev, "cavium,thunderx-spi")) {
+			octeon_spi_ops.xfer = octeontx2_spi_xfer;
+			octeon_spi_ops.mem_ops = &octeontx2_spi_mem_ops;
+		}
+	} else {
+		priv->base = dev_remap_addr(dev);
+	}
+
+	ret = clk_get_by_index(dev, 0, &priv->clk);
+	if (ret < 0)
+		return ret;
+
+	ret = clk_enable(&priv->clk);
+	if (ret)
+		return ret;
+
+	debug("SPI bus %s %d at %p\n", dev->name, dev->seq, priv->base);
+
+	return 0;
+}
+
+static const struct udevice_id octeon_spi_ids[] = {
+	/* MIPS Octeon */
+	{ .compatible = "cavium,octeon-3010-spi" },
+	/* ARM Octeon TX / TX2 */
+	{ .compatible = "cavium,thunder-8190-spi" },
+	{ }
+};
+
+U_BOOT_DRIVER(octeon_spi) = {
+	.name			= "spi_octeon",
+	.id			= UCLASS_SPI,
+	.of_match		= octeon_spi_ids,
+	.probe			= octeon_spi_probe,
+	.priv_auto_alloc_size	= sizeof(struct octeon_spi),
+	.ops			= &octeon_spi_ops,
+};