bcm53xx: backport Broadcom's iProc QSPI driver

This driver has been added instead of improving spi-bcm53xx. It has some
advantages: allows SPI speed control & hopefully doesn't have bug that
was stopping us from using multiple SPI messages for writing flash data.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>

9 files changed, 2300 insertions, 0 deletions

diff --git a/target/linux/bcm53xx/config-4.4 b/target/linux/bcm53xx/config-4.4
index 723d16a..a7675e4 100644
--- a/target/linux/bcm53xx/config-4.4
+++ b/target/linux/bcm53xx/config-4.4
@@ -298,6 +298,7 @@ CONFIG_SMP_ON_UP=y
 CONFIG_SPARSE_IRQ=y
 CONFIG_SPI=y
 CONFIG_SPI_BCM53XX=y
+# CONFIG_SPI_BCM_QSPI is not set
 CONFIG_SPI_BITBANG=y
 CONFIG_SPI_GPIO=y
 CONFIG_SPI_MASTER=y
diff --git a/target/linux/bcm53xx/patches-4.4/083-0001-spi-bcm-qspi-Add-Broadcom-MSPI-driver.patch b/target/linux/bcm53xx/patches-4.4/083-0001-spi-bcm-qspi-Add-Broadcom-MSPI-driver.patch
new file mode 100644
index 0000000..b10ba83
--- /dev/null
+++ b/target/linux/bcm53xx/patches-4.4/083-0001-spi-bcm-qspi-Add-Broadcom-MSPI-driver.patch
@@ -0,0 +1,832 @@
+From fa236a7ef24048bafaeed13f68df35a819794758 Mon Sep 17 00:00:00 2001
+From: Kamal Dasu <kdasu.kdev@gmail.com>
+Date: Wed, 24 Aug 2016 18:04:23 -0400
+Subject: [PATCH] spi: bcm-qspi: Add Broadcom MSPI driver
+
+Master SPI driver for Broadcom settop, iProc SoCs. The driver
+is used for devices that use SPI protocol on BRCMSTB, NSP, NS2
+SoCs. SoC platform driver call exported porbe(), remove()
+and suspend/resume pm_ops implemented in this common driver.
+
+Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com>
+Signed-off-by: Yendapally Reddy Dhananjaya Reddy
+Signed-off-by: Mark Brown <broonie@kernel.org>
+---
+ drivers/spi/Kconfig        |  10 +
+ drivers/spi/Makefile       |   1 +
+ drivers/spi/spi-bcm-qspi.c | 712 +++++++++++++++++++++++++++++++++++++++++++++
+ drivers/spi/spi-bcm-qspi.h |  63 ++++
+ 4 files changed, 786 insertions(+)
+ create mode 100644 drivers/spi/spi-bcm-qspi.c
+ create mode 100644 drivers/spi/spi-bcm-qspi.h
+
+--- a/drivers/spi/Kconfig
++++ b/drivers/spi/Kconfig
+@@ -147,6 +147,16 @@ config SPI_BCM63XX_HSSPI
+ 	  This enables support for the High Speed SPI controller present on
+ 	  newer Broadcom BCM63XX SoCs.
+ 
++config SPI_BCM_QSPI
++	tristate "Broadcom BSPI and MSPI controller support"
++	depends on ARCH_BRCMSTB || ARCH_BCM || ARCH_BCM_IPROC || COMPILE_TEST
++	default ARCH_BCM_IPROC
++	help
++	  Enables support for the Broadcom SPI flash and MSPI controller.
++	  Select this option for any one of BRCMSTB, iProc NSP and NS2 SoCs
++	  based platforms. This driver works for both SPI master for spi-nor
++	  flash device as well as MSPI device.
++
+ config SPI_BITBANG
+ 	tristate "Utilities for Bitbanging SPI masters"
+ 	help
+--- a/drivers/spi/Makefile
++++ b/drivers/spi/Makefile
+@@ -19,6 +19,7 @@ obj-$(CONFIG_SPI_BCM2835AUX)		+= spi-bcm
+ obj-$(CONFIG_SPI_BCM53XX)		+= spi-bcm53xx.o
+ obj-$(CONFIG_SPI_BCM63XX)		+= spi-bcm63xx.o
+ obj-$(CONFIG_SPI_BCM63XX_HSSPI)		+= spi-bcm63xx-hsspi.o
++obj-$(CONFIG_SPI_BCM_QSPI)		+= spi-bcm-qspi.o
+ obj-$(CONFIG_SPI_BFIN5XX)		+= spi-bfin5xx.o
+ obj-$(CONFIG_SPI_ADI_V3)                += spi-adi-v3.o
+ obj-$(CONFIG_SPI_BFIN_SPORT)		+= spi-bfin-sport.o
+--- /dev/null
++++ b/drivers/spi/spi-bcm-qspi.c
+@@ -0,0 +1,712 @@
++/*
++ * Driver for Broadcom BRCMSTB, NSP,  NS2, Cygnus SPI Controllers
++ *
++ * Copyright 2016 Broadcom
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License, version 2, as
++ * published by the Free Software Foundation (the "GPL").
++ *
++ * This program is distributed in the hope that it will be useful, but
++ * WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
++ * General Public License version 2 (GPLv2) for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * version 2 (GPLv2) along with this source code.
++ */
++
++#include <linux/clk.h>
++#include <linux/delay.h>
++#include <linux/device.h>
++#include <linux/init.h>
++#include <linux/interrupt.h>
++#include <linux/io.h>
++#include <linux/ioport.h>
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/mtd/cfi.h>
++#include <linux/mtd/spi-nor.h>
++#include <linux/of.h>
++#include <linux/of_irq.h>
++#include <linux/platform_device.h>
++#include <linux/slab.h>
++#include <linux/spi/spi.h>
++#include <linux/sysfs.h>
++#include <linux/types.h>
++#include "spi-bcm-qspi.h"
++
++#define DRIVER_NAME "bcm_qspi"
++
++/* MSPI register offsets */
++#define MSPI_SPCR0_LSB				0x000
++#define MSPI_SPCR0_MSB				0x004
++#define MSPI_SPCR1_LSB				0x008
++#define MSPI_SPCR1_MSB				0x00c
++#define MSPI_NEWQP				0x010
++#define MSPI_ENDQP				0x014
++#define MSPI_SPCR2				0x018
++#define MSPI_MSPI_STATUS			0x020
++#define MSPI_CPTQP				0x024
++#define MSPI_SPCR3				0x028
++#define MSPI_TXRAM				0x040
++#define MSPI_RXRAM				0x0c0
++#define MSPI_CDRAM				0x140
++#define MSPI_WRITE_LOCK			0x180
++
++#define MSPI_MASTER_BIT			BIT(7)
++
++#define MSPI_NUM_CDRAM				16
++#define MSPI_CDRAM_CONT_BIT			BIT(7)
++#define MSPI_CDRAM_BITSE_BIT			BIT(6)
++#define MSPI_CDRAM_PCS				0xf
++
++#define MSPI_SPCR2_SPE				BIT(6)
++#define MSPI_SPCR2_CONT_AFTER_CMD		BIT(7)
++
++#define MSPI_MSPI_STATUS_SPIF			BIT(0)
++
++#define INTR_BASE_BIT_SHIFT			0x02
++#define INTR_COUNT				0x07
++
++#define NUM_CHIPSELECT				4
++#define QSPI_SPBR_MIN				8U
++#define QSPI_SPBR_MAX				255U
++
++#define OPCODE_DIOR				0xBB
++#define OPCODE_QIOR				0xEB
++#define OPCODE_DIOR_4B				0xBC
++#define OPCODE_QIOR_4B				0xEC
++
++#define MAX_CMD_SIZE				6
++
++#define ADDR_4MB_MASK				GENMASK(22, 0)
++
++/* stop at end of transfer, no other reason */
++#define TRANS_STATUS_BREAK_NONE		0
++/* stop at end of spi_message */
++#define TRANS_STATUS_BREAK_EOM			1
++/* stop at end of spi_transfer if delay */
++#define TRANS_STATUS_BREAK_DELAY		2
++/* stop at end of spi_transfer if cs_change */
++#define TRANS_STATUS_BREAK_CS_CHANGE		4
++/* stop if we run out of bytes */
++#define TRANS_STATUS_BREAK_NO_BYTES		8
++
++/* events that make us stop filling TX slots */
++#define TRANS_STATUS_BREAK_TX (TRANS_STATUS_BREAK_EOM |		\
++			       TRANS_STATUS_BREAK_DELAY |		\
++			       TRANS_STATUS_BREAK_CS_CHANGE)
++
++/* events that make us deassert CS */
++#define TRANS_STATUS_BREAK_DESELECT (TRANS_STATUS_BREAK_EOM |		\
++				     TRANS_STATUS_BREAK_CS_CHANGE)
++
++struct bcm_qspi_parms {
++	u32 speed_hz;
++	u8 mode;
++	u8 bits_per_word;
++};
++
++enum base_type {
++	MSPI,
++	CHIP_SELECT,
++	BASEMAX,
++};
++
++struct bcm_qspi_irq {
++	const char *irq_name;
++	const irq_handler_t irq_handler;
++	u32 mask;
++};
++
++struct bcm_qspi_dev_id {
++	const struct bcm_qspi_irq *irqp;
++	void *dev;
++};
++
++struct qspi_trans {
++	struct spi_transfer *trans;
++	int byte;
++};
++
++struct bcm_qspi {
++	struct platform_device *pdev;
++	struct spi_master *master;
++	struct clk *clk;
++	u32 base_clk;
++	u32 max_speed_hz;
++	void __iomem *base[BASEMAX];
++	struct bcm_qspi_parms last_parms;
++	struct qspi_trans  trans_pos;
++	int curr_cs;
++	u32 s3_strap_override_ctrl;
++	bool big_endian;
++	int num_irqs;
++	struct bcm_qspi_dev_id *dev_ids;
++	struct completion mspi_done;
++};
++
++/* Read qspi controller register*/
++static inline u32 bcm_qspi_read(struct bcm_qspi *qspi, enum base_type type,
++				unsigned int offset)
++{
++	return bcm_qspi_readl(qspi->big_endian, qspi->base[type] + offset);
++}
++
++/* Write qspi controller register*/
++static inline void bcm_qspi_write(struct bcm_qspi *qspi, enum base_type type,
++				  unsigned int offset, unsigned int data)
++{
++	bcm_qspi_writel(qspi->big_endian, data, qspi->base[type] + offset);
++}
++
++static void bcm_qspi_chip_select(struct bcm_qspi *qspi, int cs)
++{
++	u32 data = 0;
++
++	if (qspi->curr_cs == cs)
++		return;
++	if (qspi->base[CHIP_SELECT]) {
++		data = bcm_qspi_read(qspi, CHIP_SELECT, 0);
++		data = (data & ~0xff) | (1 << cs);
++		bcm_qspi_write(qspi, CHIP_SELECT, 0, data);
++		usleep_range(10, 20);
++	}
++	qspi->curr_cs = cs;
++}
++
++/* MSPI helpers */
++static void bcm_qspi_hw_set_parms(struct bcm_qspi *qspi,
++				  const struct bcm_qspi_parms *xp)
++{
++	u32 spcr, spbr = 0;
++
++	if (xp->speed_hz)
++		spbr = qspi->base_clk / (2 * xp->speed_hz);
++
++	spcr = clamp_val(spbr, QSPI_SPBR_MIN, QSPI_SPBR_MAX);
++	bcm_qspi_write(qspi, MSPI, MSPI_SPCR0_LSB, spcr);
++
++	spcr = MSPI_MASTER_BIT;
++	/* for 16 bit the data should be zero */
++	if (xp->bits_per_word != 16)
++		spcr |= xp->bits_per_word << 2;
++	spcr |= xp->mode & 3;
++	bcm_qspi_write(qspi, MSPI, MSPI_SPCR0_MSB, spcr);
++
++	qspi->last_parms = *xp;
++}
++
++static void bcm_qspi_update_parms(struct bcm_qspi *qspi,
++				  struct spi_device *spi,
++				  struct spi_transfer *trans)
++{
++	struct bcm_qspi_parms xp;
++
++	xp.speed_hz = trans->speed_hz;
++	xp.bits_per_word = trans->bits_per_word;
++	xp.mode = spi->mode;
++
++	bcm_qspi_hw_set_parms(qspi, &xp);
++}
++
++static int bcm_qspi_setup(struct spi_device *spi)
++{
++	struct bcm_qspi_parms *xp;
++
++	if (spi->bits_per_word > 16)
++		return -EINVAL;
++
++	xp = spi_get_ctldata(spi);
++	if (!xp) {
++		xp = kzalloc(sizeof(*xp), GFP_KERNEL);
++		if (!xp)
++			return -ENOMEM;
++		spi_set_ctldata(spi, xp);
++	}
++	xp->speed_hz = spi->max_speed_hz;
++	xp->mode = spi->mode;
++
++	if (spi->bits_per_word)
++		xp->bits_per_word = spi->bits_per_word;
++	else
++		xp->bits_per_word = 8;
++
++	return 0;
++}
++
++static int update_qspi_trans_byte_count(struct bcm_qspi *qspi,
++					struct qspi_trans *qt, int flags)
++{
++	int ret = TRANS_STATUS_BREAK_NONE;
++
++	/* count the last transferred bytes */
++	if (qt->trans->bits_per_word <= 8)
++		qt->byte++;
++	else
++		qt->byte += 2;
++
++	if (qt->byte >= qt->trans->len) {
++		/* we're at the end of the spi_transfer */
++
++		/* in TX mode, need to pause for a delay or CS change */
++		if (qt->trans->delay_usecs &&
++		    (flags & TRANS_STATUS_BREAK_DELAY))
++			ret |= TRANS_STATUS_BREAK_DELAY;
++		if (qt->trans->cs_change &&
++		    (flags & TRANS_STATUS_BREAK_CS_CHANGE))
++			ret |= TRANS_STATUS_BREAK_CS_CHANGE;
++		if (ret)
++			goto done;
++
++		dev_dbg(&qspi->pdev->dev, "advance msg exit\n");
++		if (spi_transfer_is_last(qspi->master, qt->trans))
++			ret = TRANS_STATUS_BREAK_EOM;
++		else
++			ret = TRANS_STATUS_BREAK_NO_BYTES;
++
++		qt->trans = NULL;
++	}
++
++done:
++	dev_dbg(&qspi->pdev->dev, "trans %p len %d byte %d ret %x\n",
++		qt->trans, qt->trans ? qt->trans->len : 0, qt->byte, ret);
++	return ret;
++}
++
++static inline u8 read_rxram_slot_u8(struct bcm_qspi *qspi, int slot)
++{
++	u32 slot_offset = MSPI_RXRAM + (slot << 3) + 0x4;
++
++	/* mask out reserved bits */
++	return bcm_qspi_read(qspi, MSPI, slot_offset) & 0xff;
++}
++
++static inline u16 read_rxram_slot_u16(struct bcm_qspi *qspi, int slot)
++{
++	u32 reg_offset = MSPI_RXRAM;
++	u32 lsb_offset = reg_offset + (slot << 3) + 0x4;
++	u32 msb_offset = reg_offset + (slot << 3);
++
++	return (bcm_qspi_read(qspi, MSPI, lsb_offset) & 0xff) |
++		((bcm_qspi_read(qspi, MSPI, msb_offset) & 0xff) << 8);
++}
++
++static void read_from_hw(struct bcm_qspi *qspi, int slots)
++{
++	struct qspi_trans tp;
++	int slot;
++
++	if (slots > MSPI_NUM_CDRAM) {
++		/* should never happen */
++		dev_err(&qspi->pdev->dev, "%s: too many slots!\n", __func__);
++		return;
++	}
++
++	tp = qspi->trans_pos;
++
++	for (slot = 0; slot < slots; slot++) {
++		if (tp.trans->bits_per_word <= 8) {
++			u8 *buf = tp.trans->rx_buf;
++
++			if (buf)
++				buf[tp.byte] = read_rxram_slot_u8(qspi, slot);
++			dev_dbg(&qspi->pdev->dev, "RD %02x\n",
++				buf ? buf[tp.byte] : 0xff);
++		} else {
++			u16 *buf = tp.trans->rx_buf;
++
++			if (buf)
++				buf[tp.byte / 2] = read_rxram_slot_u16(qspi,
++								      slot);
++			dev_dbg(&qspi->pdev->dev, "RD %04x\n",
++				buf ? buf[tp.byte] : 0xffff);
++		}
++
++		update_qspi_trans_byte_count(qspi, &tp,
++					     TRANS_STATUS_BREAK_NONE);
++	}
++
++	qspi->trans_pos = tp;
++}
++
++static inline void write_txram_slot_u8(struct bcm_qspi *qspi, int slot,
++				       u8 val)
++{
++	u32 reg_offset = MSPI_TXRAM + (slot << 3);
++
++	/* mask out reserved bits */
++	bcm_qspi_write(qspi, MSPI, reg_offset, val);
++}
++
++static inline void write_txram_slot_u16(struct bcm_qspi *qspi, int slot,
++					u16 val)
++{
++	u32 reg_offset = MSPI_TXRAM;
++	u32 msb_offset = reg_offset + (slot << 3);
++	u32 lsb_offset = reg_offset + (slot << 3) + 0x4;
++
++	bcm_qspi_write(qspi, MSPI, msb_offset, (val >> 8));
++	bcm_qspi_write(qspi, MSPI, lsb_offset, (val & 0xff));
++}
++
++static inline u32 read_cdram_slot(struct bcm_qspi *qspi, int slot)
++{
++	return bcm_qspi_read(qspi, MSPI, MSPI_CDRAM + (slot << 2));
++}
++
++static inline void write_cdram_slot(struct bcm_qspi *qspi, int slot, u32 val)
++{
++	bcm_qspi_write(qspi, MSPI, (MSPI_CDRAM + (slot << 2)), val);
++}
++
++/* Return number of slots written */
++static int write_to_hw(struct bcm_qspi *qspi, struct spi_device *spi)
++{
++	struct qspi_trans tp;
++	int slot = 0, tstatus = 0;
++	u32 mspi_cdram = 0;
++
++	tp = qspi->trans_pos;
++	bcm_qspi_update_parms(qspi, spi, tp.trans);
++
++	/* Run until end of transfer or reached the max data */
++	while (!tstatus && slot < MSPI_NUM_CDRAM) {
++		if (tp.trans->bits_per_word <= 8) {
++			const u8 *buf = tp.trans->tx_buf;
++			u8 val = buf ? buf[tp.byte] : 0xff;
++
++			write_txram_slot_u8(qspi, slot, val);
++			dev_dbg(&qspi->pdev->dev, "WR %02x\n", val);
++		} else {
++			const u16 *buf = tp.trans->tx_buf;
++			u16 val = buf ? buf[tp.byte / 2] : 0xffff;
++
++			write_txram_slot_u16(qspi, slot, val);
++			dev_dbg(&qspi->pdev->dev, "WR %04x\n", val);
++		}
++		mspi_cdram = MSPI_CDRAM_CONT_BIT;
++		mspi_cdram |= (~(1 << spi->chip_select) &
++			       MSPI_CDRAM_PCS);
++		mspi_cdram |= ((tp.trans->bits_per_word <= 8) ? 0 :
++				MSPI_CDRAM_BITSE_BIT);
++
++		write_cdram_slot(qspi, slot, mspi_cdram);
++
++		tstatus = update_qspi_trans_byte_count(qspi, &tp,
++						       TRANS_STATUS_BREAK_TX);
++		slot++;
++	}
++
++	if (!slot) {
++		dev_err(&qspi->pdev->dev, "%s: no data to send?", __func__);
++		goto done;
++	}
++
++	dev_dbg(&qspi->pdev->dev, "submitting %d slots\n", slot);
++	bcm_qspi_write(qspi, MSPI, MSPI_NEWQP, 0);
++	bcm_qspi_write(qspi, MSPI, MSPI_ENDQP, slot - 1);
++
++	if (tstatus & TRANS_STATUS_BREAK_DESELECT) {
++		mspi_cdram = read_cdram_slot(qspi, slot - 1) &
++			~MSPI_CDRAM_CONT_BIT;
++		write_cdram_slot(qspi, slot - 1, mspi_cdram);
++	}
++
++	/* Must flush previous writes before starting MSPI operation */
++	mb();
++	/* Set cont | spe | spifie */
++	bcm_qspi_write(qspi, MSPI, MSPI_SPCR2, 0xe0);
++
++done:
++	return slot;
++}
++
++static int bcm_qspi_transfer_one(struct spi_master *master,
++				 struct spi_device *spi,
++				 struct spi_transfer *trans)
++{
++	struct bcm_qspi *qspi = spi_master_get_devdata(master);
++	int slots;
++	unsigned long timeo = msecs_to_jiffies(100);
++
++	bcm_qspi_chip_select(qspi, spi->chip_select);
++	qspi->trans_pos.trans = trans;
++	qspi->trans_pos.byte = 0;
++
++	while (qspi->trans_pos.byte < trans->len) {
++		reinit_completion(&qspi->mspi_done);
++
++		slots = write_to_hw(qspi, spi);
++		if (!wait_for_completion_timeout(&qspi->mspi_done, timeo)) {
++			dev_err(&qspi->pdev->dev, "timeout waiting for MSPI\n");
++			return -ETIMEDOUT;
++		}
++
++		read_from_hw(qspi, slots);
++	}
++
++	return 0;
++}
++
++static void bcm_qspi_cleanup(struct spi_device *spi)
++{
++	struct bcm_qspi_parms *xp = spi_get_ctldata(spi);
++
++	kfree(xp);
++}
++
++static irqreturn_t bcm_qspi_mspi_l2_isr(int irq, void *dev_id)
++{
++	struct bcm_qspi_dev_id *qspi_dev_id = dev_id;
++	struct bcm_qspi *qspi = qspi_dev_id->dev;
++	u32 status = bcm_qspi_read(qspi, MSPI, MSPI_MSPI_STATUS);
++
++	if (status & MSPI_MSPI_STATUS_SPIF) {
++		/* clear interrupt */
++		status &= ~MSPI_MSPI_STATUS_SPIF;
++		bcm_qspi_write(qspi, MSPI, MSPI_MSPI_STATUS, status);
++		complete(&qspi->mspi_done);
++		return IRQ_HANDLED;
++	} else {
++		return IRQ_NONE;
++	}
++}
++
++static const struct bcm_qspi_irq qspi_irq_tab[] = {
++	{
++		.irq_name = "mspi_done",
++		.irq_handler = bcm_qspi_mspi_l2_isr,
++		.mask = INTR_MSPI_DONE_MASK,
++	},
++	{
++		.irq_name = "mspi_halted",
++		.irq_handler = bcm_qspi_mspi_l2_isr,
++		.mask = INTR_MSPI_HALTED_MASK,
++	},
++};
++
++static void bcm_qspi_hw_init(struct bcm_qspi *qspi)
++{
++	struct bcm_qspi_parms parms;
++
++	bcm_qspi_write(qspi, MSPI, MSPI_SPCR1_LSB, 0);
++	bcm_qspi_write(qspi, MSPI, MSPI_SPCR1_MSB, 0);
++	bcm_qspi_write(qspi, MSPI, MSPI_NEWQP, 0);
++	bcm_qspi_write(qspi, MSPI, MSPI_ENDQP, 0);
++	bcm_qspi_write(qspi, MSPI, MSPI_SPCR2, 0x20);
++
++	parms.mode = SPI_MODE_3;
++	parms.bits_per_word = 8;
++	parms.speed_hz = qspi->max_speed_hz;
++	bcm_qspi_hw_set_parms(qspi, &parms);
++}
++
++static void bcm_qspi_hw_uninit(struct bcm_qspi *qspi)
++{
++	bcm_qspi_write(qspi, MSPI, MSPI_SPCR2, 0);
++}
++
++static const struct of_device_id bcm_qspi_of_match[] = {
++	{ .compatible = "brcm,spi-bcm-qspi" },
++	{},
++};
++MODULE_DEVICE_TABLE(of, bcm_qspi_of_match);
++
++int bcm_qspi_probe(struct platform_device *pdev,
++		   struct bcm_qspi_soc_intc *soc)
++{
++	struct device *dev = &pdev->dev;
++	struct bcm_qspi *qspi;
++	struct spi_master *master;
++	struct resource *res;
++	int irq, ret = 0, num_ints = 0;
++	u32 val;
++	const char *name = NULL;
++	int num_irqs = ARRAY_SIZE(qspi_irq_tab);
++
++	/* We only support device-tree instantiation */
++	if (!dev->of_node)
++		return -ENODEV;
++
++	if (!of_match_node(bcm_qspi_of_match, dev->of_node))
++		return -ENODEV;
++
++	master = spi_alloc_master(dev, sizeof(struct bcm_qspi));
++	if (!master) {
++		dev_err(dev, "error allocating spi_master\n");
++		return -ENOMEM;
++	}
++
++	qspi = spi_master_get_devdata(master);
++	qspi->pdev = pdev;
++	qspi->trans_pos.trans = NULL;
++	qspi->trans_pos.byte = 0;
++	qspi->master = master;
++
++	master->bus_num = -1;
++	master->mode_bits = SPI_CPHA | SPI_CPOL | SPI_RX_DUAL | SPI_RX_QUAD;
++	master->setup = bcm_qspi_setup;
++	master->transfer_one = bcm_qspi_transfer_one;
++	master->cleanup = bcm_qspi_cleanup;
++	master->dev.of_node = dev->of_node;
++	master->num_chipselect = NUM_CHIPSELECT;
++
++	qspi->big_endian = of_device_is_big_endian(dev->of_node);
++
++	if (!of_property_read_u32(dev->of_node, "num-cs", &val))
++		master->num_chipselect = val;
++
++	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hif_mspi");
++	if (!res)
++		res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
++						   "mspi");
++
++	if (res) {
++		qspi->base[MSPI]  = devm_ioremap_resource(dev, res);
++		if (IS_ERR(qspi->base[MSPI])) {
++			ret = PTR_ERR(qspi->base[MSPI]);
++			goto qspi_probe_err;
++		}
++	} else {
++		goto qspi_probe_err;
++	}
++
++	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cs_reg");
++	if (res) {
++		qspi->base[CHIP_SELECT]  = devm_ioremap_resource(dev, res);
++		if (IS_ERR(qspi->base[CHIP_SELECT])) {
++			ret = PTR_ERR(qspi->base[CHIP_SELECT]);
++			goto qspi_probe_err;
++		}
++	}
++
++	qspi->dev_ids = kcalloc(num_irqs, sizeof(struct bcm_qspi_dev_id),
++				GFP_KERNEL);
++	if (IS_ERR(qspi->dev_ids)) {
++		ret = PTR_ERR(qspi->dev_ids);
++		goto qspi_probe_err;
++	}
++
++	for (val = 0; val < num_irqs; val++) {
++		irq = -1;
++		name = qspi_irq_tab[val].irq_name;
++		irq = platform_get_irq_byname(pdev, name);
++
++		if (irq  >= 0) {
++			ret = devm_request_irq(&pdev->dev, irq,
++					       qspi_irq_tab[val].irq_handler, 0,
++					       name,
++					       &qspi->dev_ids[val]);
++			if (ret < 0) {
++				dev_err(&pdev->dev, "IRQ %s not found\n", name);
++				goto qspi_probe_err;
++			}
++
++			qspi->dev_ids[val].dev = qspi;
++			qspi->dev_ids[val].irqp = &qspi_irq_tab[val];
++			num_ints++;
++			dev_dbg(&pdev->dev, "registered IRQ %s %d\n",
++				qspi_irq_tab[val].irq_name,
++				irq);
++		}
++	}
++
++	if (!num_ints) {
++		dev_err(&pdev->dev, "no IRQs registered, cannot init driver\n");
++		goto qspi_probe_err;
++	}
++
++	qspi->clk = devm_clk_get(&pdev->dev, NULL);
++	if (IS_ERR(qspi->clk)) {
++		dev_warn(dev, "unable to get clock\n");
++		goto qspi_probe_err;
++	}
++
++	ret = clk_prepare_enable(qspi->clk);
++	if (ret) {
++		dev_err(dev, "failed to prepare clock\n");
++		goto qspi_probe_err;
++	}
++
++	qspi->base_clk = clk_get_rate(qspi->clk);
++	qspi->max_speed_hz = qspi->base_clk / (QSPI_SPBR_MIN * 2);
++
++	bcm_qspi_hw_init(qspi);
++	init_completion(&qspi->mspi_done);
++	qspi->curr_cs = -1;
++
++	platform_set_drvdata(pdev, qspi);
++	ret = devm_spi_register_master(&pdev->dev, master);
++	if (ret < 0) {
++		dev_err(dev, "can't register master\n");
++		goto qspi_reg_err;
++	}
++
++	return 0;
++
++qspi_reg_err:
++	bcm_qspi_hw_uninit(qspi);
++	clk_disable_unprepare(qspi->clk);
++qspi_probe_err:
++	spi_master_put(master);
++	kfree(qspi->dev_ids);
++	return ret;
++}
++/* probe function to be called by SoC specific platform driver probe */
++EXPORT_SYMBOL_GPL(bcm_qspi_probe);
++
++int bcm_qspi_remove(struct platform_device *pdev)
++{
++	struct bcm_qspi *qspi = platform_get_drvdata(pdev);
++
++	platform_set_drvdata(pdev, NULL);
++	bcm_qspi_hw_uninit(qspi);
++	clk_disable_unprepare(qspi->clk);
++	kfree(qspi->dev_ids);
++	spi_unregister_master(qspi->master);
++
++	return 0;
++}
++/* function to be called by SoC specific platform driver remove() */
++EXPORT_SYMBOL_GPL(bcm_qspi_remove);
++
++#ifdef CONFIG_PM_SLEEP
++static int bcm_qspi_suspend(struct device *dev)
++{
++	struct bcm_qspi *qspi = dev_get_drvdata(dev);
++
++	spi_master_suspend(qspi->master);
++	clk_disable(qspi->clk);
++	bcm_qspi_hw_uninit(qspi);
++
++	return 0;
++};
++
++static int bcm_qspi_resume(struct device *dev)
++{
++	struct bcm_qspi *qspi = dev_get_drvdata(dev);
++	int ret = 0;
++
++	bcm_qspi_hw_init(qspi);
++	bcm_qspi_chip_select(qspi, qspi->curr_cs);
++	ret = clk_enable(qspi->clk);
++	if (!ret)
++		spi_master_resume(qspi->master);
++
++	return ret;
++}
++#endif /* CONFIG_PM_SLEEP */
++
++const struct dev_pm_ops bcm_qspi_pm_ops = {
++	.suspend = bcm_qspi_suspend,
++	.resume  = bcm_qspi_resume,
++};
++/* pm_ops to be called by SoC specific platform driver */
++EXPORT_SYMBOL_GPL(bcm_qspi_pm_ops);
++
++MODULE_AUTHOR("Kamal Dasu");
++MODULE_DESCRIPTION("Broadcom QSPI driver");
++MODULE_LICENSE("GPL v2");
++MODULE_ALIAS("platform:" DRIVER_NAME);
+--- /dev/null
++++ b/drivers/spi/spi-bcm-qspi.h
+@@ -0,0 +1,63 @@
++/*
++ * Copyright 2016 Broadcom
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License, version 2, as
++ * published by the Free Software Foundation (the "GPL").
++ *
++ * This program is distributed in the hope that it will be useful, but
++ * WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
++ * General Public License version 2 (GPLv2) for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * version 2 (GPLv2) along with this source code.
++ */
++
++#ifndef __SPI_BCM_QSPI_H__
++#define __SPI_BCM_QSPI_H__
++
++#include <linux/types.h>
++#include <linux/io.h>
++
++/* MSPI Interrupt masks */
++#define INTR_MSPI_HALTED_MASK			BIT(6)
++#define INTR_MSPI_DONE_MASK			BIT(5)
++
++#define MSPI_INTERRUPTS_ALL		       \
++	(INTR_MSPI_DONE_MASK |		       \
++	 INTR_MSPI_HALTED_MASK)
++
++struct platform_device;
++struct dev_pm_ops;
++
++struct bcm_qspi_soc_intc;
++
++/* Read controller register*/
++static inline u32 bcm_qspi_readl(bool be, void __iomem *addr)
++{
++	if (be)
++		return ioread32be(addr);
++	else
++		return readl_relaxed(addr);
++}
++
++/* Write controller register*/
++static inline void bcm_qspi_writel(bool be,
++				   unsigned int data, void __iomem *addr)
++{
++	if (be)
++		iowrite32be(data, addr);
++	else
++		writel_relaxed(data, addr);
++}
++
++/* The common driver functions to be called by the SoC platform driver */
++int bcm_qspi_probe(struct platform_device *pdev,
++		   struct bcm_qspi_soc_intc *soc_intc);
++int bcm_qspi_remove(struct platform_device *pdev);
++
++/* pm_ops used by the SoC platform driver called on PM suspend/resume */
++extern const struct dev_pm_ops bcm_qspi_pm_ops;
++
++#endif /* __SPI_BCM_QSPI_H__ */
diff --git a/target/linux/bcm53xx/patches-4.4/083-0002-spi-brcmstb-qspi-Broadcom-settop-platform-driver.patch b/target/linux/bcm53xx/patches-4.4/083-0002-spi-brcmstb-qspi-Broadcom-settop-platform-driver.patch
new file mode 100644
index 0000000..476b11c
--- /dev/null
+++ b/target/linux/bcm53xx/patches-4.4/083-0002-spi-brcmstb-qspi-Broadcom-settop-platform-driver.patch
@@ -0,0 +1,84 @@
+From 44f95d87a6187f5027568bbcdce491713d7de5e5 Mon Sep 17 00:00:00 2001
+From: Kamal Dasu <kdasu.kdev@gmail.com>
+Date: Wed, 24 Aug 2016 18:04:24 -0400
+Subject: [PATCH] spi: brcmstb-qspi: Broadcom settop platform driver
+
+Adding the settop SoC platfrom driver, this driver is compatible
+with the settop MSPI+BSPI and MSPI only blocks implemented on the
+SoCs. Driver calls the spi-bcm-qspi probe(), remove() and pm_ops.
+
+Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com>
+Signed-off-by: Mark Brown <broonie@kernel.org>
+---
+ drivers/spi/Makefile           |  2 +-
+ drivers/spi/spi-brcmstb-qspi.c | 53 ++++++++++++++++++++++++++++++++++++++++++
+ 2 files changed, 54 insertions(+), 1 deletion(-)
+ create mode 100644 drivers/spi/spi-brcmstb-qspi.c
+
+--- a/drivers/spi/Makefile
++++ b/drivers/spi/Makefile
+@@ -19,7 +19,7 @@ obj-$(CONFIG_SPI_BCM2835AUX)		+= spi-bcm
+ obj-$(CONFIG_SPI_BCM53XX)		+= spi-bcm53xx.o
+ obj-$(CONFIG_SPI_BCM63XX)		+= spi-bcm63xx.o
+ obj-$(CONFIG_SPI_BCM63XX_HSSPI)		+= spi-bcm63xx-hsspi.o
+-obj-$(CONFIG_SPI_BCM_QSPI)		+= spi-bcm-qspi.o
++obj-$(CONFIG_SPI_BCM_QSPI)		+= spi-brcmstb-qspi.o spi-bcm-qspi.o
+ obj-$(CONFIG_SPI_BFIN5XX)		+= spi-bfin5xx.o
+ obj-$(CONFIG_SPI_ADI_V3)                += spi-adi-v3.o
+ obj-$(CONFIG_SPI_BFIN_SPORT)		+= spi-bfin-sport.o
+--- /dev/null
++++ b/drivers/spi/spi-brcmstb-qspi.c
+@@ -0,0 +1,53 @@
++/*
++ * Copyright 2016 Broadcom
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License, version 2, as
++ * published by the Free Software Foundation (the "GPL").
++ *
++ * This program is distributed in the hope that it will be useful, but
++ * WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
++ * General Public License version 2 (GPLv2) for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * version 2 (GPLv2) along with this source code.
++ */
++
++#include <linux/device.h>
++#include <linux/module.h>
++#include <linux/platform_device.h>
++#include <linux/of.h>
++#include "spi-bcm-qspi.h"
++
++static const struct of_device_id brcmstb_qspi_of_match[] = {
++	{ .compatible = "brcm,spi-brcmstb-qspi" },
++	{ .compatible = "brcm,spi-brcmstb-mspi" },
++	{},
++};
++MODULE_DEVICE_TABLE(of, brcmstb_qspi_of_match);
++
++static int brcmstb_qspi_probe(struct platform_device *pdev)
++{
++	return bcm_qspi_probe(pdev, NULL);
++}
++
++static int brcmstb_qspi_remove(struct platform_device *pdev)
++{
++	return bcm_qspi_remove(pdev);
++}
++
++static struct platform_driver brcmstb_qspi_driver = {
++	.probe			= brcmstb_qspi_probe,
++	.remove			= brcmstb_qspi_remove,
++	.driver = {
++		.name		= "brcmstb_qspi",
++		.pm		= &bcm_qspi_pm_ops,
++		.of_match_table = brcmstb_qspi_of_match,
++	}
++};
++module_platform_driver(brcmstb_qspi_driver);
++
++MODULE_LICENSE("GPL v2");
++MODULE_AUTHOR("Kamal Dasu");
++MODULE_DESCRIPTION("Broadcom SPI driver for settop SoC");
diff --git a/target/linux/bcm53xx/patches-4.4/083-0003-spi-bcm-qspi-Add-BSPI-spi-nor-flash-controller-drive.patch b/target/linux/bcm53xx/patches-4.4/083-0003-spi-bcm-qspi-Add-BSPI-spi-nor-flash-controller-drive.patch
new file mode 100644
index 0000000..f5f2ba0
--- /dev/null
+++ b/target/linux/bcm53xx/patches-4.4/083-0003-spi-bcm-qspi-Add-BSPI-spi-nor-flash-controller-drive.patch
@@ -0,0 +1,780 @@
+From 4e3b2d236fe00f0e0b6c45dcb3cc7d84c2316424 Mon Sep 17 00:00:00 2001
+From: Kamal Dasu <kdasu.kdev@gmail.com>
+Date: Wed, 24 Aug 2016 18:04:25 -0400
+Subject: [PATCH] spi: bcm-qspi: Add BSPI spi-nor flash controller driver
+
+This change implements BSPI driver for Broadcom BRCMSTB, NS2,
+NSP SoCs works in combination with the MSPI controller driver
+and implements flash read acceleration and implements  the
+spi_flash_read() method. Both MSPI and BSPI controllers are
+needed to access spi-nor flash.
+
+Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com>
+Signed-off-by: Yendapally Reddy Dhananjaya Reddy <yendapally.reddy@broadcom.com>
+Signed-off-by: Mark Brown <broonie@kernel.org>
+---
+ drivers/spi/spi-bcm-qspi.c | 603 ++++++++++++++++++++++++++++++++++++++++++++-
+ drivers/spi/spi-bcm-qspi.h |  20 ++
+ 2 files changed, 620 insertions(+), 3 deletions(-)
+
+--- a/drivers/spi/spi-bcm-qspi.c
++++ b/drivers/spi/spi-bcm-qspi.c
+@@ -38,6 +38,60 @@
+ 
+ #define DRIVER_NAME "bcm_qspi"
+ 
++
++/* BSPI register offsets */
++#define BSPI_REVISION_ID			0x000
++#define BSPI_SCRATCH				0x004
++#define BSPI_MAST_N_BOOT_CTRL			0x008
++#define BSPI_BUSY_STATUS			0x00c
++#define BSPI_INTR_STATUS			0x010
++#define BSPI_B0_STATUS				0x014
++#define BSPI_B0_CTRL				0x018
++#define BSPI_B1_STATUS				0x01c
++#define BSPI_B1_CTRL				0x020
++#define BSPI_STRAP_OVERRIDE_CTRL		0x024
++#define BSPI_FLEX_MODE_ENABLE			0x028
++#define BSPI_BITS_PER_CYCLE			0x02c
++#define BSPI_BITS_PER_PHASE			0x030
++#define BSPI_CMD_AND_MODE_BYTE			0x034
++#define BSPI_BSPI_FLASH_UPPER_ADDR_BYTE	0x038
++#define BSPI_BSPI_XOR_VALUE			0x03c
++#define BSPI_BSPI_XOR_ENABLE			0x040
++#define BSPI_BSPI_PIO_MODE_ENABLE		0x044
++#define BSPI_BSPI_PIO_IODIR			0x048
++#define BSPI_BSPI_PIO_DATA			0x04c
++
++/* RAF register offsets */
++#define BSPI_RAF_START_ADDR			0x100
++#define BSPI_RAF_NUM_WORDS			0x104
++#define BSPI_RAF_CTRL				0x108
++#define BSPI_RAF_FULLNESS			0x10c
++#define BSPI_RAF_WATERMARK			0x110
++#define BSPI_RAF_STATUS			0x114
++#define BSPI_RAF_READ_DATA			0x118
++#define BSPI_RAF_WORD_CNT			0x11c
++#define BSPI_RAF_CURR_ADDR			0x120
++
++/* Override mode masks */
++#define BSPI_STRAP_OVERRIDE_CTRL_OVERRIDE	BIT(0)
++#define BSPI_STRAP_OVERRIDE_CTRL_DATA_DUAL	BIT(1)
++#define BSPI_STRAP_OVERRIDE_CTRL_ADDR_4BYTE	BIT(2)
++#define BSPI_STRAP_OVERRIDE_CTRL_DATA_QUAD	BIT(3)
++#define BSPI_STRAP_OVERRIDE_CTRL_ENDAIN_MODE	BIT(4)
++
++#define BSPI_ADDRLEN_3BYTES			3
++#define BSPI_ADDRLEN_4BYTES			4
++
++#define BSPI_RAF_STATUS_FIFO_EMPTY_MASK	BIT(1)
++
++#define BSPI_RAF_CTRL_START_MASK		BIT(0)
++#define BSPI_RAF_CTRL_CLEAR_MASK		BIT(1)
++
++#define BSPI_BPP_MODE_SELECT_MASK		BIT(8)
++#define BSPI_BPP_ADDR_SELECT_MASK		BIT(16)
++
++#define BSPI_READ_LENGTH			256
++
+ /* MSPI register offsets */
+ #define MSPI_SPCR0_LSB				0x000
+ #define MSPI_SPCR0_MSB				0x004
+@@ -108,8 +162,16 @@ struct bcm_qspi_parms {
+ 	u8 bits_per_word;
+ };
+ 
++struct bcm_xfer_mode {
++	bool flex_mode;
++	unsigned int width;
++	unsigned int addrlen;
++	unsigned int hp;
++};
++
+ enum base_type {
+ 	MSPI,
++	BSPI,
+ 	CHIP_SELECT,
+ 	BASEMAX,
+ };
+@@ -140,13 +202,28 @@ struct bcm_qspi {
+ 	struct bcm_qspi_parms last_parms;
+ 	struct qspi_trans  trans_pos;
+ 	int curr_cs;
++	int bspi_maj_rev;
++	int bspi_min_rev;
++	int bspi_enabled;
++	struct spi_flash_read_message *bspi_rf_msg;
++	u32 bspi_rf_msg_idx;
++	u32 bspi_rf_msg_len;
++	u32 bspi_rf_msg_status;
++	struct bcm_xfer_mode xfer_mode;
+ 	u32 s3_strap_override_ctrl;
++	bool bspi_mode;
+ 	bool big_endian;
+ 	int num_irqs;
+ 	struct bcm_qspi_dev_id *dev_ids;
+ 	struct completion mspi_done;
++	struct completion bspi_done;
+ };
+ 
++static inline bool has_bspi(struct bcm_qspi *qspi)
++{
++	return qspi->bspi_mode;
++}
++
+ /* Read qspi controller register*/
+ static inline u32 bcm_qspi_read(struct bcm_qspi *qspi, enum base_type type,
+ 				unsigned int offset)
+@@ -161,6 +238,300 @@ static inline void bcm_qspi_write(struct
+ 	bcm_qspi_writel(qspi->big_endian, data, qspi->base[type] + offset);
+ }
+ 
++/* BSPI helpers */
++static int bcm_qspi_bspi_busy_poll(struct bcm_qspi *qspi)
++{
++	int i;
++
++	/* this should normally finish within 10us */
++	for (i = 0; i < 1000; i++) {
++		if (!(bcm_qspi_read(qspi, BSPI, BSPI_BUSY_STATUS) & 1))
++			return 0;
++		udelay(1);
++	}
++	dev_warn(&qspi->pdev->dev, "timeout waiting for !busy_status\n");
++	return -EIO;
++}
++
++static inline bool bcm_qspi_bspi_ver_three(struct bcm_qspi *qspi)
++{
++	if (qspi->bspi_maj_rev < 4)
++		return true;
++	return false;
++}
++
++static void bcm_qspi_bspi_flush_prefetch_buffers(struct bcm_qspi *qspi)
++{
++	bcm_qspi_bspi_busy_poll(qspi);
++	/* Force rising edge for the b0/b1 'flush' field */
++	bcm_qspi_write(qspi, BSPI, BSPI_B0_CTRL, 1);
++	bcm_qspi_write(qspi, BSPI, BSPI_B1_CTRL, 1);
++	bcm_qspi_write(qspi, BSPI, BSPI_B0_CTRL, 0);
++	bcm_qspi_write(qspi, BSPI, BSPI_B1_CTRL, 0);
++}
++
++static int bcm_qspi_bspi_lr_is_fifo_empty(struct bcm_qspi *qspi)
++{
++	return (bcm_qspi_read(qspi, BSPI, BSPI_RAF_STATUS) &
++				BSPI_RAF_STATUS_FIFO_EMPTY_MASK);
++}
++
++static inline u32 bcm_qspi_bspi_lr_read_fifo(struct bcm_qspi *qspi)
++{
++	u32 data = bcm_qspi_read(qspi, BSPI, BSPI_RAF_READ_DATA);
++
++	/* BSPI v3 LR is LE only, convert data to host endianness */
++	if (bcm_qspi_bspi_ver_three(qspi))
++		data = le32_to_cpu(data);
++
++	return data;
++}
++
++static inline void bcm_qspi_bspi_lr_start(struct bcm_qspi *qspi)
++{
++	bcm_qspi_bspi_busy_poll(qspi);
++	bcm_qspi_write(qspi, BSPI, BSPI_RAF_CTRL,
++		       BSPI_RAF_CTRL_START_MASK);
++}
++
++static inline void bcm_qspi_bspi_lr_clear(struct bcm_qspi *qspi)
++{
++	bcm_qspi_write(qspi, BSPI, BSPI_RAF_CTRL,
++		       BSPI_RAF_CTRL_CLEAR_MASK);
++	bcm_qspi_bspi_flush_prefetch_buffers(qspi);
++}
++
++static void bcm_qspi_bspi_lr_data_read(struct bcm_qspi *qspi)
++{
++	u32 *buf = (u32 *)qspi->bspi_rf_msg->buf;
++	u32 data = 0;
++
++	dev_dbg(&qspi->pdev->dev, "xfer %p rx %p rxlen %d\n", qspi->bspi_rf_msg,
++		qspi->bspi_rf_msg->buf, qspi->bspi_rf_msg_len);
++	while (!bcm_qspi_bspi_lr_is_fifo_empty(qspi)) {
++		data = bcm_qspi_bspi_lr_read_fifo(qspi);
++		if (likely(qspi->bspi_rf_msg_len >= 4) &&
++		    IS_ALIGNED((uintptr_t)buf, 4)) {
++			buf[qspi->bspi_rf_msg_idx++] = data;
++			qspi->bspi_rf_msg_len -= 4;
++		} else {
++			/* Read out remaining bytes, make sure*/
++			u8 *cbuf = (u8 *)&buf[qspi->bspi_rf_msg_idx];
++
++			data = cpu_to_le32(data);
++			while (qspi->bspi_rf_msg_len) {
++				*cbuf++ = (u8)data;
++				data >>= 8;
++				qspi->bspi_rf_msg_len--;
++			}
++		}
++	}
++}
++
++static void bcm_qspi_bspi_set_xfer_params(struct bcm_qspi *qspi, u8 cmd_byte,
++					  int bpp, int bpc, int flex_mode)
++{
++	bcm_qspi_write(qspi, BSPI, BSPI_FLEX_MODE_ENABLE, 0);
++	bcm_qspi_write(qspi, BSPI, BSPI_BITS_PER_CYCLE, bpc);
++	bcm_qspi_write(qspi, BSPI, BSPI_BITS_PER_PHASE, bpp);
++	bcm_qspi_write(qspi, BSPI, BSPI_CMD_AND_MODE_BYTE, cmd_byte);
++	bcm_qspi_write(qspi, BSPI, BSPI_FLEX_MODE_ENABLE, flex_mode);
++}
++
++static int bcm_qspi_bspi_set_flex_mode(struct bcm_qspi *qspi, int width,
++				       int addrlen, int hp)
++{
++	int bpc = 0, bpp = 0;
++	u8 command = SPINOR_OP_READ_FAST;
++	int flex_mode = 1, rv = 0;
++	bool spans_4byte = false;
++
++	dev_dbg(&qspi->pdev->dev, "set flex mode w %x addrlen %x hp %d\n",
++		width, addrlen, hp);
++
++	if (addrlen == BSPI_ADDRLEN_4BYTES) {
++		bpp = BSPI_BPP_ADDR_SELECT_MASK;
++		spans_4byte = true;
++	}
++
++	bpp |= 8;
++
++	switch (width) {
++	case SPI_NBITS_SINGLE:
++		if (addrlen == BSPI_ADDRLEN_3BYTES)
++			/* default mode, does not need flex_cmd */
++			flex_mode = 0;
++		else
++			command = SPINOR_OP_READ4_FAST;
++		break;
++	case SPI_NBITS_DUAL:
++		bpc = 0x00000001;
++		if (hp) {
++			bpc |= 0x00010100; /* address and mode are 2-bit */
++			bpp = BSPI_BPP_MODE_SELECT_MASK;
++			command = OPCODE_DIOR;
++			if (spans_4byte)
++				command = OPCODE_DIOR_4B;
++		} else {
++			command = SPINOR_OP_READ_1_1_2;
++			if (spans_4byte)
++				command = SPINOR_OP_READ4_1_1_2;
++		}
++		break;
++	case SPI_NBITS_QUAD:
++		bpc = 0x00000002;
++		if (hp) {
++			bpc |= 0x00020200; /* address and mode are 4-bit */
++			bpp = 4; /* dummy cycles */
++			bpp |= BSPI_BPP_ADDR_SELECT_MASK;
++			command = OPCODE_QIOR;
++			if (spans_4byte)
++				command = OPCODE_QIOR_4B;
++		} else {
++			command = SPINOR_OP_READ_1_1_4;
++			if (spans_4byte)
++				command = SPINOR_OP_READ4_1_1_4;
++		}
++		break;
++	default:
++		rv = -EINVAL;
++		break;
++	}
++
++	if (rv == 0)
++		bcm_qspi_bspi_set_xfer_params(qspi, command, bpp, bpc,
++					      flex_mode);
++
++	return rv;
++}
++
++static int bcm_qspi_bspi_set_override(struct bcm_qspi *qspi, int width,
++				      int addrlen, int hp)
++{
++	u32 data = bcm_qspi_read(qspi, BSPI, BSPI_STRAP_OVERRIDE_CTRL);
++
++	dev_dbg(&qspi->pdev->dev, "set override mode w %x addrlen %x hp %d\n",
++		width, addrlen, hp);
++
++	switch (width) {
++	case SPI_NBITS_SINGLE:
++		/* clear quad/dual mode */
++		data &= ~(BSPI_STRAP_OVERRIDE_CTRL_DATA_QUAD |
++			  BSPI_STRAP_OVERRIDE_CTRL_DATA_DUAL);
++		break;
++
++	case SPI_NBITS_QUAD:
++		/* clear dual mode and set quad mode */
++		data &= ~BSPI_STRAP_OVERRIDE_CTRL_DATA_DUAL;
++		data |= BSPI_STRAP_OVERRIDE_CTRL_DATA_QUAD;
++		break;
++	case SPI_NBITS_DUAL:
++		/* clear quad mode set dual mode */
++		data &= ~BSPI_STRAP_OVERRIDE_CTRL_DATA_QUAD;
++		data |= BSPI_STRAP_OVERRIDE_CTRL_DATA_DUAL;
++		break;
++	default:
++		return -EINVAL;
++	}
++
++	if (addrlen == BSPI_ADDRLEN_4BYTES)
++		/* set 4byte mode*/
++		data |= BSPI_STRAP_OVERRIDE_CTRL_ADDR_4BYTE;
++	else
++		/* clear 4 byte mode */
++		data &= ~BSPI_STRAP_OVERRIDE_CTRL_ADDR_4BYTE;
++
++	/* set the override mode */
++	data |=	BSPI_STRAP_OVERRIDE_CTRL_OVERRIDE;
++	bcm_qspi_write(qspi, BSPI, BSPI_STRAP_OVERRIDE_CTRL, data);
++	bcm_qspi_bspi_set_xfer_params(qspi, SPINOR_OP_READ_FAST, 0, 0, 0);
++
++	return 0;
++}
++
++static int bcm_qspi_bspi_set_mode(struct bcm_qspi *qspi,
++				  int width, int addrlen, int hp)
++{
++	int error = 0;
++
++	/* default mode */
++	qspi->xfer_mode.flex_mode = true;
++
++	if (!bcm_qspi_bspi_ver_three(qspi)) {
++		u32 val, mask;
++
++		val = bcm_qspi_read(qspi, BSPI, BSPI_STRAP_OVERRIDE_CTRL);
++		mask = BSPI_STRAP_OVERRIDE_CTRL_OVERRIDE;
++		if (val & mask || qspi->s3_strap_override_ctrl & mask) {
++			qspi->xfer_mode.flex_mode = false;
++			bcm_qspi_write(qspi, BSPI, BSPI_FLEX_MODE_ENABLE,
++				       0);
++
++			if ((val | qspi->s3_strap_override_ctrl) &
++			    BSPI_STRAP_OVERRIDE_CTRL_DATA_DUAL)
++				width = SPI_NBITS_DUAL;
++			else if ((val |  qspi->s3_strap_override_ctrl) &
++				 BSPI_STRAP_OVERRIDE_CTRL_DATA_QUAD)
++				width = SPI_NBITS_QUAD;
++
++			error = bcm_qspi_bspi_set_override(qspi, width, addrlen,
++							   hp);
++		}
++	}
++
++	if (qspi->xfer_mode.flex_mode)
++		error = bcm_qspi_bspi_set_flex_mode(qspi, width, addrlen, hp);
++
++	if (error) {
++		dev_warn(&qspi->pdev->dev,
++			 "INVALID COMBINATION: width=%d addrlen=%d hp=%d\n",
++			 width, addrlen, hp);
++	} else if (qspi->xfer_mode.width != width ||
++		   qspi->xfer_mode.addrlen != addrlen ||
++		   qspi->xfer_mode.hp != hp) {
++		qspi->xfer_mode.width = width;
++		qspi->xfer_mode.addrlen = addrlen;
++		qspi->xfer_mode.hp = hp;
++		dev_dbg(&qspi->pdev->dev,
++			"cs:%d %d-lane output, %d-byte address%s\n",
++			qspi->curr_cs,
++			qspi->xfer_mode.width,
++			qspi->xfer_mode.addrlen,
++			qspi->xfer_mode.hp != -1 ? ", hp mode" : "");
++	}
++
++	return error;
++}
++
++static void bcm_qspi_enable_bspi(struct bcm_qspi *qspi)
++{
++	if (!has_bspi(qspi) || (qspi->bspi_enabled))
++		return;
++
++	qspi->bspi_enabled = 1;
++	if ((bcm_qspi_read(qspi, BSPI, BSPI_MAST_N_BOOT_CTRL) & 1) == 0)
++		return;
++
++	bcm_qspi_bspi_flush_prefetch_buffers(qspi);
++	udelay(1);
++	bcm_qspi_write(qspi, BSPI, BSPI_MAST_N_BOOT_CTRL, 0);
++	udelay(1);
++}
++
++static void bcm_qspi_disable_bspi(struct bcm_qspi *qspi)
++{
++	if (!has_bspi(qspi) || (!qspi->bspi_enabled))
++		return;
++
++	qspi->bspi_enabled = 0;
++	if ((bcm_qspi_read(qspi, BSPI, BSPI_MAST_N_BOOT_CTRL) & 1))
++		return;
++
++	bcm_qspi_bspi_busy_poll(qspi);
++	bcm_qspi_write(qspi, BSPI, BSPI_MAST_N_BOOT_CTRL, 1);
++	udelay(1);
++}
++
+ static void bcm_qspi_chip_select(struct bcm_qspi *qspi, int cs)
+ {
+ 	u32 data = 0;
+@@ -298,6 +669,8 @@ static void read_from_hw(struct bcm_qspi
+ 	struct qspi_trans tp;
+ 	int slot;
+ 
++	bcm_qspi_disable_bspi(qspi);
++
+ 	if (slots > MSPI_NUM_CDRAM) {
+ 		/* should never happen */
+ 		dev_err(&qspi->pdev->dev, "%s: too many slots!\n", __func__);
+@@ -368,6 +741,7 @@ static int write_to_hw(struct bcm_qspi *
+ 	int slot = 0, tstatus = 0;
+ 	u32 mspi_cdram = 0;
+ 
++	bcm_qspi_disable_bspi(qspi);
+ 	tp = qspi->trans_pos;
+ 	bcm_qspi_update_parms(qspi, spi, tp.trans);
+ 
+@@ -414,6 +788,9 @@ static int write_to_hw(struct bcm_qspi *
+ 		write_cdram_slot(qspi, slot - 1, mspi_cdram);
+ 	}
+ 
++	if (has_bspi(qspi))
++		bcm_qspi_write(qspi, MSPI, MSPI_WRITE_LOCK, 1);
++
+ 	/* Must flush previous writes before starting MSPI operation */
+ 	mb();
+ 	/* Set cont | spe | spifie */
+@@ -423,6 +800,118 @@ done:
+ 	return slot;
+ }
+ 
++static int bcm_qspi_bspi_flash_read(struct spi_device *spi,
++				    struct spi_flash_read_message *msg)
++{
++	struct bcm_qspi *qspi = spi_master_get_devdata(spi->master);
++	u32 addr = 0, len, len_words;
++	int ret = 0;
++	unsigned long timeo = msecs_to_jiffies(100);
++
++	if (bcm_qspi_bspi_ver_three(qspi))
++		if (msg->addr_width == BSPI_ADDRLEN_4BYTES)
++			return -EIO;
++
++	bcm_qspi_chip_select(qspi, spi->chip_select);
++	bcm_qspi_write(qspi, MSPI, MSPI_WRITE_LOCK, 0);
++
++	/*
++	 * when using flex mode mode we need to send
++	 * the upper address byte to bspi
++	 */
++	if (bcm_qspi_bspi_ver_three(qspi) == false) {
++		addr = msg->from & 0xff000000;
++		bcm_qspi_write(qspi, BSPI,
++			       BSPI_BSPI_FLASH_UPPER_ADDR_BYTE, addr);
++	}
++
++	if (!qspi->xfer_mode.flex_mode)
++		addr = msg->from;
++	else
++		addr = msg->from & 0x00ffffff;
++
++	/* set BSPI RAF buffer max read length */
++	len = msg->len;
++	if (len > BSPI_READ_LENGTH)
++		len = BSPI_READ_LENGTH;
++
++	if (bcm_qspi_bspi_ver_three(qspi) == true)
++		addr = (addr + 0xc00000) & 0xffffff;
++
++	reinit_completion(&qspi->bspi_done);
++	bcm_qspi_enable_bspi(qspi);
++	len_words = (len + 3) >> 2;
++	qspi->bspi_rf_msg = msg;
++	qspi->bspi_rf_msg_status = 0;
++	qspi->bspi_rf_msg_idx = 0;
++	qspi->bspi_rf_msg_len = len;
++	dev_dbg(&qspi->pdev->dev, "bspi xfr addr 0x%x len 0x%x", addr, len);
++
++	bcm_qspi_write(qspi, BSPI, BSPI_RAF_START_ADDR, addr);
++	bcm_qspi_write(qspi, BSPI, BSPI_RAF_NUM_WORDS, len_words);
++	bcm_qspi_write(qspi, BSPI, BSPI_RAF_WATERMARK, 0);
++
++	/* Must flush previous writes before starting BSPI operation */
++	mb();
++
++	bcm_qspi_bspi_lr_start(qspi);
++	if (!wait_for_completion_timeout(&qspi->bspi_done, timeo)) {
++		dev_err(&qspi->pdev->dev, "timeout waiting for BSPI\n");
++		ret = -ETIMEDOUT;
++	} else {
++		/* set the return length for the caller */
++		msg->retlen = len;
++	}
++
++	return ret;
++}
++
++static int bcm_qspi_flash_read(struct spi_device *spi,
++			       struct spi_flash_read_message *msg)
++{
++	struct bcm_qspi *qspi = spi_master_get_devdata(spi->master);
++	int ret = 0;
++	bool mspi_read = false;
++	u32 io_width, addrlen, addr, len;
++	u_char *buf;
++
++	buf = msg->buf;
++	addr = msg->from;
++	len = msg->len;
++
++	if (bcm_qspi_bspi_ver_three(qspi) == true) {
++		/*
++		 * The address coming into this function is a raw flash offset.
++		 * But for BSPI <= V3, we need to convert it to a remapped BSPI
++		 * address. If it crosses a 4MB boundary, just revert back to
++		 * using MSPI.
++		 */
++		addr = (addr + 0xc00000) & 0xffffff;
++
++		if ((~ADDR_4MB_MASK & addr) ^
++		    (~ADDR_4MB_MASK & (addr + len - 1)))
++			mspi_read = true;
++	}
++
++	/* non-aligned and very short transfers are handled by MSPI */
++	if (!IS_ALIGNED((uintptr_t)addr, 4) || !IS_ALIGNED((uintptr_t)buf, 4) ||
++	    len < 4)
++		mspi_read = true;
++
++	if (mspi_read)
++		/* this will make the m25p80 read to fallback to mspi read */
++		return -EAGAIN;
++
++	io_width = msg->data_nbits ? msg->data_nbits : SPI_NBITS_SINGLE;
++	addrlen = msg->addr_width;
++	ret = bcm_qspi_bspi_set_mode(qspi, io_width, addrlen, -1);
++
++	if (!ret)
++		ret = bcm_qspi_bspi_flash_read(spi, msg);
++
++	return ret;
++}
++
+ static int bcm_qspi_transfer_one(struct spi_master *master,
+ 				 struct spi_device *spi,
+ 				 struct spi_transfer *trans)
+@@ -469,13 +958,76 @@ static irqreturn_t bcm_qspi_mspi_l2_isr(
+ 		bcm_qspi_write(qspi, MSPI, MSPI_MSPI_STATUS, status);
+ 		complete(&qspi->mspi_done);
+ 		return IRQ_HANDLED;
+-	} else {
+-		return IRQ_NONE;
+ 	}
++
++	return IRQ_NONE;
++}
++
++static irqreturn_t bcm_qspi_bspi_lr_l2_isr(int irq, void *dev_id)
++{
++	struct bcm_qspi_dev_id *qspi_dev_id = dev_id;
++	struct bcm_qspi *qspi = qspi_dev_id->dev;
++	u32 status;
++
++	if (qspi->bspi_enabled && qspi->bspi_rf_msg) {
++		bcm_qspi_bspi_lr_data_read(qspi);
++		if (qspi->bspi_rf_msg_len == 0) {
++			qspi->bspi_rf_msg = NULL;
++			if (qspi->bspi_rf_msg_status)
++				bcm_qspi_bspi_lr_clear(qspi);
++			else
++				bcm_qspi_bspi_flush_prefetch_buffers(qspi);
++		}
++	}
++
++	status = (qspi_dev_id->irqp->mask & INTR_BSPI_LR_SESSION_DONE_MASK);
++	if (qspi->bspi_enabled && status && qspi->bspi_rf_msg_len == 0)
++		complete(&qspi->bspi_done);
++
++	return IRQ_HANDLED;
++}
++
++static irqreturn_t bcm_qspi_bspi_lr_err_l2_isr(int irq, void *dev_id)
++{
++	struct bcm_qspi_dev_id *qspi_dev_id = dev_id;
++	struct bcm_qspi *qspi = qspi_dev_id->dev;
++
++	dev_err(&qspi->pdev->dev, "BSPI INT error\n");
++	qspi->bspi_rf_msg_status = -EIO;
++	complete(&qspi->bspi_done);
++	return IRQ_HANDLED;
+ }
+ 
+ static const struct bcm_qspi_irq qspi_irq_tab[] = {
+ 	{
++		.irq_name = "spi_lr_fullness_reached",
++		.irq_handler = bcm_qspi_bspi_lr_l2_isr,
++		.mask = INTR_BSPI_LR_FULLNESS_REACHED_MASK,
++	},
++	{
++		.irq_name = "spi_lr_session_aborted",
++		.irq_handler = bcm_qspi_bspi_lr_err_l2_isr,
++		.mask = INTR_BSPI_LR_SESSION_ABORTED_MASK,
++	},
++	{
++		.irq_name = "spi_lr_impatient",
++		.irq_handler = bcm_qspi_bspi_lr_err_l2_isr,
++		.mask = INTR_BSPI_LR_IMPATIENT_MASK,
++	},
++	{
++		.irq_name = "spi_lr_session_done",
++		.irq_handler = bcm_qspi_bspi_lr_l2_isr,
++		.mask = INTR_BSPI_LR_SESSION_DONE_MASK,
++	},
++#ifdef QSPI_INT_DEBUG
++	/* this interrupt is for debug purposes only, dont request irq */
++	{
++		.irq_name = "spi_lr_overread",
++		.irq_handler = bcm_qspi_bspi_lr_err_l2_isr,
++		.mask = INTR_BSPI_LR_OVERREAD_MASK,
++	},
++#endif
++	{
+ 		.irq_name = "mspi_done",
+ 		.irq_handler = bcm_qspi_mspi_l2_isr,
+ 		.mask = INTR_MSPI_DONE_MASK,
+@@ -487,6 +1039,24 @@ static const struct bcm_qspi_irq qspi_ir
+ 	},
+ };
+ 
++static void bcm_qspi_bspi_init(struct bcm_qspi *qspi)
++{
++	u32 val = 0;
++
++	val = bcm_qspi_read(qspi, BSPI, BSPI_REVISION_ID);
++	qspi->bspi_maj_rev = (val >> 8) & 0xff;
++	qspi->bspi_min_rev = val & 0xff;
++	if (!(bcm_qspi_bspi_ver_three(qspi))) {
++		/* Force mapping of BSPI address -> flash offset */
++		bcm_qspi_write(qspi, BSPI, BSPI_BSPI_XOR_VALUE, 0);
++		bcm_qspi_write(qspi, BSPI, BSPI_BSPI_XOR_ENABLE, 1);
++	}
++	qspi->bspi_enabled = 1;
++	bcm_qspi_disable_bspi(qspi);
++	bcm_qspi_write(qspi, BSPI, BSPI_B0_CTRL, 0);
++	bcm_qspi_write(qspi, BSPI, BSPI_B1_CTRL, 0);
++}
++
+ static void bcm_qspi_hw_init(struct bcm_qspi *qspi)
+ {
+ 	struct bcm_qspi_parms parms;
+@@ -501,11 +1071,17 @@ static void bcm_qspi_hw_init(struct bcm_
+ 	parms.bits_per_word = 8;
+ 	parms.speed_hz = qspi->max_speed_hz;
+ 	bcm_qspi_hw_set_parms(qspi, &parms);
++
++	if (has_bspi(qspi))
++		bcm_qspi_bspi_init(qspi);
+ }
+ 
+ static void bcm_qspi_hw_uninit(struct bcm_qspi *qspi)
+ {
+ 	bcm_qspi_write(qspi, MSPI, MSPI_SPCR2, 0);
++	if (has_bspi(qspi))
++		bcm_qspi_write(qspi, MSPI, MSPI_WRITE_LOCK, 0);
++
+ }
+ 
+ static const struct of_device_id bcm_qspi_of_match[] = {
+@@ -515,7 +1091,7 @@ static const struct of_device_id bcm_qsp
+ MODULE_DEVICE_TABLE(of, bcm_qspi_of_match);
+ 
+ int bcm_qspi_probe(struct platform_device *pdev,
+-		   struct bcm_qspi_soc_intc *soc)
++		   struct bcm_qspi_soc_intc *soc_intc)
+ {
+ 	struct device *dev = &pdev->dev;
+ 	struct bcm_qspi *qspi;
+@@ -549,6 +1125,7 @@ int bcm_qspi_probe(struct platform_devic
+ 	master->mode_bits = SPI_CPHA | SPI_CPOL | SPI_RX_DUAL | SPI_RX_QUAD;
+ 	master->setup = bcm_qspi_setup;
+ 	master->transfer_one = bcm_qspi_transfer_one;
++	master->spi_flash_read = bcm_qspi_flash_read;
+ 	master->cleanup = bcm_qspi_cleanup;
+ 	master->dev.of_node = dev->of_node;
+ 	master->num_chipselect = NUM_CHIPSELECT;
+@@ -573,6 +1150,20 @@ int bcm_qspi_probe(struct platform_devic
+ 		goto qspi_probe_err;
+ 	}
+ 
++	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "bspi");
++	if (res) {
++		qspi->base[BSPI]  = devm_ioremap_resource(dev, res);
++		if (IS_ERR(qspi->base[BSPI])) {
++			ret = PTR_ERR(qspi->base[BSPI]);
++			goto qspi_probe_err;
++		}
++		qspi->bspi_mode = true;
++	} else {
++		qspi->bspi_mode = false;
++	}
++
++	dev_info(dev, "using %smspi mode\n", qspi->bspi_mode ? "bspi-" : "");
++
+ 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cs_reg");
+ 	if (res) {
+ 		qspi->base[CHIP_SELECT]  = devm_ioremap_resource(dev, res);
+@@ -635,9 +1226,15 @@ int bcm_qspi_probe(struct platform_devic
+ 
+ 	bcm_qspi_hw_init(qspi);
+ 	init_completion(&qspi->mspi_done);
++	init_completion(&qspi->bspi_done);
+ 	qspi->curr_cs = -1;
+ 
+ 	platform_set_drvdata(pdev, qspi);
++
++	qspi->xfer_mode.width = -1;
++	qspi->xfer_mode.addrlen = -1;
++	qspi->xfer_mode.hp = -1;
++
+ 	ret = devm_spi_register_master(&pdev->dev, master);
+ 	if (ret < 0) {
+ 		dev_err(dev, "can't register master\n");
+--- a/drivers/spi/spi-bcm-qspi.h
++++ b/drivers/spi/spi-bcm-qspi.h
+@@ -20,6 +20,26 @@
+ #include <linux/types.h>
+ #include <linux/io.h>
+ 
++/* BSPI interrupt masks */
++#define INTR_BSPI_LR_OVERREAD_MASK		BIT(4)
++#define INTR_BSPI_LR_SESSION_DONE_MASK		BIT(3)
++#define INTR_BSPI_LR_IMPATIENT_MASK		BIT(2)
++#define INTR_BSPI_LR_SESSION_ABORTED_MASK	BIT(1)
++#define INTR_BSPI_LR_FULLNESS_REACHED_MASK	BIT(0)
++
++#define BSPI_LR_INTERRUPTS_DATA		       \
++	(INTR_BSPI_LR_SESSION_DONE_MASK |	       \
++	 INTR_BSPI_LR_FULLNESS_REACHED_MASK)
++
++#define BSPI_LR_INTERRUPTS_ERROR               \
++	(INTR_BSPI_LR_OVERREAD_MASK |	       \
++	 INTR_BSPI_LR_IMPATIENT_MASK |	       \
++	 INTR_BSPI_LR_SESSION_ABORTED_MASK)
++
++#define BSPI_LR_INTERRUPTS_ALL                 \
++	(BSPI_LR_INTERRUPTS_ERROR |	       \
++	 BSPI_LR_INTERRUPTS_DATA)
++
+ /* MSPI Interrupt masks */
+ #define INTR_MSPI_HALTED_MASK			BIT(6)
+ #define INTR_MSPI_DONE_MASK			BIT(5)
diff --git a/target/linux/bcm53xx/patches-4.4/083-0004-spi-bcm-qspi-don-t-include-linux-mtd-cfi.h.patch b/target/linux/bcm53xx/patches-4.4/083-0004-spi-bcm-qspi-don-t-include-linux-mtd-cfi.h.patch
new file mode 100644
index 0000000..f90c02b
--- /dev/null
+++ b/target/linux/bcm53xx/patches-4.4/083-0004-spi-bcm-qspi-don-t-include-linux-mtd-cfi.h.patch
@@ -0,0 +1,27 @@
+From c0a75d072a501effd66d3392ada8d3f4283b87ef Mon Sep 17 00:00:00 2001
+From: Arnd Bergmann <arnd@arndb.de>
+Date: Thu, 15 Sep 2016 17:40:15 +0200
+Subject: [PATCH] spi: bcm-qspi: don't include linux/mtd/cfi.h
+
+The header isn't actually needed here, but including it leads
+to a build warning when CONFIG_MTD is disabled:
+
+include/linux/mtd/cfi.h:76:2: #warning No CONFIG_MTD_CFI_Ix selected. No NOR chip support can work. [-Werror=cpp]
+
+Fixes: fa236a7ef240 (spi: bcm-qspi: Add Broadcom MSPI driver)
+Signed-off-by: Arnd Bergmann <arnd@arndb.de>
+Signed-off-by: Mark Brown <broonie@kernel.org>
+---
+ drivers/spi/spi-bcm-qspi.c | 1 -
+ 1 file changed, 1 deletion(-)
+
+--- a/drivers/spi/spi-bcm-qspi.c
++++ b/drivers/spi/spi-bcm-qspi.c
+@@ -25,7 +25,6 @@
+ #include <linux/ioport.h>
+ #include <linux/kernel.h>
+ #include <linux/module.h>
+-#include <linux/mtd/cfi.h>
+ #include <linux/mtd/spi-nor.h>
+ #include <linux/of.h>
+ #include <linux/of_irq.h>
diff --git a/target/linux/bcm53xx/patches-4.4/083-0005-spi-bcm-qspi-fix-suspend-resume-ifdef.patch b/target/linux/bcm53xx/patches-4.4/083-0005-spi-bcm-qspi-fix-suspend-resume-ifdef.patch
new file mode 100644
index 0000000..aad22d2
--- /dev/null
+++ b/target/linux/bcm53xx/patches-4.4/083-0005-spi-bcm-qspi-fix-suspend-resume-ifdef.patch
@@ -0,0 +1,63 @@
+From a0319f8b12c0fb9800da61f4cba9bd6fd80e37a4 Mon Sep 17 00:00:00 2001
+From: Arnd Bergmann <arnd@arndb.de>
+Date: Thu, 15 Sep 2016 17:46:53 +0200
+Subject: [PATCH] spi: bcm-qspi: fix suspend/resume #ifdef
+
+The two power management functions are define inside of an #ifdef
+but referenced unconditionally, which is obviously broken when
+CONFIG_PM_SLEEP is not set:
+
+drivers/spi/spi-bcm-qspi.c:1300:13: error: 'bcm_qspi_suspend' undeclared here (not in a function)
+drivers/spi/spi-bcm-qspi.c:1301:13: error: 'bcm_qspi_resume' undeclared here (not in a function)
+
+This replaces the #ifdef with a __maybe_unused annotation that lets
+the compiler figure out whether to drop the functions itself,
+and uses SIMPLE_DEV_PM_OPS() to refer to the functions.
+
+This will also fill the freeze/thaw/poweroff/restore callback
+pointers in addition to suspend/resume, but as far as I can tell,
+this is what we want.
+
+Signed-off-by: Arnd Bergmann <arnd@arndb.de>
+Fixes: fa236a7ef240 ("spi: bcm-qspi: Add Broadcom MSPI driver")
+Signed-off-by: Mark Brown <broonie@kernel.org>
+---
+ drivers/spi/spi-bcm-qspi.c | 12 ++++--------
+ 1 file changed, 4 insertions(+), 8 deletions(-)
+
+--- a/drivers/spi/spi-bcm-qspi.c
++++ b/drivers/spi/spi-bcm-qspi.c
+@@ -1268,8 +1268,7 @@ int bcm_qspi_remove(struct platform_devi
+ /* function to be called by SoC specific platform driver remove() */
+ EXPORT_SYMBOL_GPL(bcm_qspi_remove);
+ 
+-#ifdef CONFIG_PM_SLEEP
+-static int bcm_qspi_suspend(struct device *dev)
++static int __maybe_unused bcm_qspi_suspend(struct device *dev)
+ {
+ 	struct bcm_qspi *qspi = dev_get_drvdata(dev);
+ 
+@@ -1280,7 +1279,7 @@ static int bcm_qspi_suspend(struct devic
+ 	return 0;
+ };
+ 
+-static int bcm_qspi_resume(struct device *dev)
++static int __maybe_unused bcm_qspi_resume(struct device *dev)
+ {
+ 	struct bcm_qspi *qspi = dev_get_drvdata(dev);
+ 	int ret = 0;
+@@ -1293,12 +1292,9 @@ static int bcm_qspi_resume(struct device
+ 
+ 	return ret;
+ }
+-#endif /* CONFIG_PM_SLEEP */
+ 
+-const struct dev_pm_ops bcm_qspi_pm_ops = {
+-	.suspend = bcm_qspi_suspend,
+-	.resume  = bcm_qspi_resume,
+-};
++SIMPLE_DEV_PM_OPS(bcm_qspi_pm_ops, bcm_qspi_suspend, bcm_qspi_resume);
++
+ /* pm_ops to be called by SoC specific platform driver */
+ EXPORT_SYMBOL_GPL(bcm_qspi_pm_ops);
+ 
diff --git a/target/linux/bcm53xx/patches-4.4/083-0006-spi-bcm-qspi-Fix-return-value-check-in-bcm_qspi_prob.patch b/target/linux/bcm53xx/patches-4.4/083-0006-spi-bcm-qspi-Fix-return-value-check-in-bcm_qspi_prob.patch
new file mode 100644
index 0000000..d71b2f4
--- /dev/null
+++ b/target/linux/bcm53xx/patches-4.4/083-0006-spi-bcm-qspi-Fix-return-value-check-in-bcm_qspi_prob.patch
@@ -0,0 +1,29 @@
+From 3bf3eb2b95aaf18eff3080444b24673cda8ff9a2 Mon Sep 17 00:00:00 2001
+From: Wei Yongjun <weiyongjun1@huawei.com>
+Date: Fri, 16 Sep 2016 13:45:17 +0000
+Subject: [PATCH] spi: bcm-qspi: Fix return value check in bcm_qspi_probe()
+
+In case of error, the function kcalloc() returns NULL pointer
+not ERR_PTR(). The IS_ERR() test in the return value check
+should be replaced with NULL test.
+
+Fixes: fa236a7ef240 ("spi: bcm-qspi: Add Broadcom MSPI driver")
+Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
+Signed-off-by: Mark Brown <broonie@kernel.org>
+---
+ drivers/spi/spi-bcm-qspi.c | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+--- a/drivers/spi/spi-bcm-qspi.c
++++ b/drivers/spi/spi-bcm-qspi.c
+@@ -1174,8 +1174,8 @@ int bcm_qspi_probe(struct platform_devic
+ 
+ 	qspi->dev_ids = kcalloc(num_irqs, sizeof(struct bcm_qspi_dev_id),
+ 				GFP_KERNEL);
+-	if (IS_ERR(qspi->dev_ids)) {
+-		ret = PTR_ERR(qspi->dev_ids);
++	if (!qspi->dev_ids) {
++		ret = -ENOMEM;
+ 		goto qspi_probe_err;
+ 	}
+ 
diff --git a/target/linux/bcm53xx/patches-4.4/083-0007-spi-bcm-qspi-Fix-error-return-code-in-bcm_qspi_probe.patch b/target/linux/bcm53xx/patches-4.4/083-0007-spi-bcm-qspi-Fix-error-return-code-in-bcm_qspi_probe.patch
new file mode 100644
index 0000000..a15deb5
--- /dev/null
+++ b/target/linux/bcm53xx/patches-4.4/083-0007-spi-bcm-qspi-Fix-error-return-code-in-bcm_qspi_probe.patch
@@ -0,0 +1,32 @@
+From 71b8f350a4f03730f3024bfa7dc2414904a21bcb Mon Sep 17 00:00:00 2001
+From: Wei Yongjun <weiyongjun1@huawei.com>
+Date: Fri, 16 Sep 2016 14:00:19 +0000
+Subject: [PATCH] spi: bcm-qspi: Fix error return code in bcm_qspi_probe()
+
+Fix to return a negative error code from the error handling
+case instead of 0, as done elsewhere in this function.
+
+Fixes: fa236a7ef240 ("spi: bcm-qspi: Add Broadcom MSPI driver")
+Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
+Signed-off-by: Mark Brown <broonie@kernel.org>
+---
+ drivers/spi/spi-bcm-qspi.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+--- a/drivers/spi/spi-bcm-qspi.c
++++ b/drivers/spi/spi-bcm-qspi.c
+@@ -1205,12 +1205,14 @@ int bcm_qspi_probe(struct platform_devic
+ 
+ 	if (!num_ints) {
+ 		dev_err(&pdev->dev, "no IRQs registered, cannot init driver\n");
++		ret = -EINVAL;
+ 		goto qspi_probe_err;
+ 	}
+ 
+ 	qspi->clk = devm_clk_get(&pdev->dev, NULL);
+ 	if (IS_ERR(qspi->clk)) {
+ 		dev_warn(dev, "unable to get clock\n");
++		ret = PTR_ERR(qspi->clk);
+ 		goto qspi_probe_err;
+ 	}
+ 
diff --git a/target/linux/bcm53xx/patches-4.4/083-0008-spi-iproc-qspi-Add-Broadcom-iProc-SoCs-support.patch b/target/linux/bcm53xx/patches-4.4/083-0008-spi-iproc-qspi-Add-Broadcom-iProc-SoCs-support.patch
new file mode 100644
index 0000000..836d629
--- /dev/null
+++ b/target/linux/bcm53xx/patches-4.4/083-0008-spi-iproc-qspi-Add-Broadcom-iProc-SoCs-support.patch
@@ -0,0 +1,452 @@
+From cc20a38612dbc87dc7396affc9758e3bfbe92340 Mon Sep 17 00:00:00 2001
+From: Kamal Dasu <kdasu.kdev@gmail.com>
+Date: Wed, 24 Aug 2016 18:04:29 -0400
+Subject: [PATCH] spi: iproc-qspi: Add Broadcom iProc SoCs support
+
+This spi driver uses the common spi-bcm-qspi driver and implements iProc
+SoCs specific interrupt controller. The common driver now calls the SoC
+handlers when present. Adding support for both muxed l1 and unmuxed interrupt
+sources.
+
+Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com>
+Signed-off-by: Yendapally Reddy Dhananjaya Reddy <yendapally.reddy@broadcom.com>
+Signed-off-by: Mark Brown <broonie@kernel.org>
+---
+ drivers/spi/Makefile         |   2 +-
+ drivers/spi/spi-bcm-qspi.c   |  97 ++++++++++++++++++++++++-
+ drivers/spi/spi-bcm-qspi.h   |  34 ++++++++-
+ drivers/spi/spi-iproc-qspi.c | 163 +++++++++++++++++++++++++++++++++++++++++++
+ 4 files changed, 291 insertions(+), 5 deletions(-)
+ create mode 100644 drivers/spi/spi-iproc-qspi.c
+
+--- a/drivers/spi/Makefile
++++ b/drivers/spi/Makefile
+@@ -19,7 +19,7 @@ obj-$(CONFIG_SPI_BCM2835AUX)		+= spi-bcm
+ obj-$(CONFIG_SPI_BCM53XX)		+= spi-bcm53xx.o
+ obj-$(CONFIG_SPI_BCM63XX)		+= spi-bcm63xx.o
+ obj-$(CONFIG_SPI_BCM63XX_HSSPI)		+= spi-bcm63xx-hsspi.o
+-obj-$(CONFIG_SPI_BCM_QSPI)		+= spi-brcmstb-qspi.o spi-bcm-qspi.o
++obj-$(CONFIG_SPI_BCM_QSPI)		+= spi-iproc-qspi.o spi-brcmstb-qspi.o spi-bcm-qspi.o
+ obj-$(CONFIG_SPI_BFIN5XX)		+= spi-bfin5xx.o
+ obj-$(CONFIG_SPI_ADI_V3)                += spi-adi-v3.o
+ obj-$(CONFIG_SPI_BFIN_SPORT)		+= spi-bfin-sport.o
+--- a/drivers/spi/spi-bcm-qspi.c
++++ b/drivers/spi/spi-bcm-qspi.c
+@@ -175,9 +175,15 @@ enum base_type {
+ 	BASEMAX,
+ };
+ 
++enum irq_source {
++	SINGLE_L2,
++	MUXED_L1,
++};
++
+ struct bcm_qspi_irq {
+ 	const char *irq_name;
+ 	const irq_handler_t irq_handler;
++	int irq_source;
+ 	u32 mask;
+ };
+ 
+@@ -198,6 +204,10 @@ struct bcm_qspi {
+ 	u32 base_clk;
+ 	u32 max_speed_hz;
+ 	void __iomem *base[BASEMAX];
++
++	/* Some SoCs provide custom interrupt status register(s) */
++	struct bcm_qspi_soc_intc	*soc_intc;
++
+ 	struct bcm_qspi_parms last_parms;
+ 	struct qspi_trans  trans_pos;
+ 	int curr_cs;
+@@ -806,6 +816,7 @@ static int bcm_qspi_bspi_flash_read(stru
+ 	u32 addr = 0, len, len_words;
+ 	int ret = 0;
+ 	unsigned long timeo = msecs_to_jiffies(100);
++	struct bcm_qspi_soc_intc *soc_intc = qspi->soc_intc;
+ 
+ 	if (bcm_qspi_bspi_ver_three(qspi))
+ 		if (msg->addr_width == BSPI_ADDRLEN_4BYTES)
+@@ -850,6 +861,15 @@ static int bcm_qspi_bspi_flash_read(stru
+ 	bcm_qspi_write(qspi, BSPI, BSPI_RAF_NUM_WORDS, len_words);
+ 	bcm_qspi_write(qspi, BSPI, BSPI_RAF_WATERMARK, 0);
+ 
++	if (qspi->soc_intc) {
++		/*
++		 * clear soc MSPI and BSPI interrupts and enable
++		 * BSPI interrupts.
++		 */
++		soc_intc->bcm_qspi_int_ack(soc_intc, MSPI_BSPI_DONE);
++		soc_intc->bcm_qspi_int_set(soc_intc, BSPI_DONE, true);
++	}
++
+ 	/* Must flush previous writes before starting BSPI operation */
+ 	mb();
+ 
+@@ -952,9 +972,12 @@ static irqreturn_t bcm_qspi_mspi_l2_isr(
+ 	u32 status = bcm_qspi_read(qspi, MSPI, MSPI_MSPI_STATUS);
+ 
+ 	if (status & MSPI_MSPI_STATUS_SPIF) {
++		struct bcm_qspi_soc_intc *soc_intc = qspi->soc_intc;
+ 		/* clear interrupt */
+ 		status &= ~MSPI_MSPI_STATUS_SPIF;
+ 		bcm_qspi_write(qspi, MSPI, MSPI_MSPI_STATUS, status);
++		if (qspi->soc_intc)
++			soc_intc->bcm_qspi_int_ack(soc_intc, MSPI_DONE);
+ 		complete(&qspi->mspi_done);
+ 		return IRQ_HANDLED;
+ 	}
+@@ -966,20 +989,33 @@ static irqreturn_t bcm_qspi_bspi_lr_l2_i
+ {
+ 	struct bcm_qspi_dev_id *qspi_dev_id = dev_id;
+ 	struct bcm_qspi *qspi = qspi_dev_id->dev;
+-	u32 status;
++	struct bcm_qspi_soc_intc *soc_intc = qspi->soc_intc;
++	u32 status = qspi_dev_id->irqp->mask;
+ 
+ 	if (qspi->bspi_enabled && qspi->bspi_rf_msg) {
+ 		bcm_qspi_bspi_lr_data_read(qspi);
+ 		if (qspi->bspi_rf_msg_len == 0) {
+ 			qspi->bspi_rf_msg = NULL;
++			if (qspi->soc_intc) {
++				/* disable soc BSPI interrupt */
++				soc_intc->bcm_qspi_int_set(soc_intc, BSPI_DONE,
++							   false);
++				/* indicate done */
++				status = INTR_BSPI_LR_SESSION_DONE_MASK;
++			}
++
+ 			if (qspi->bspi_rf_msg_status)
+ 				bcm_qspi_bspi_lr_clear(qspi);
+ 			else
+ 				bcm_qspi_bspi_flush_prefetch_buffers(qspi);
+ 		}
++
++		if (qspi->soc_intc)
++			/* clear soc BSPI interrupt */
++			soc_intc->bcm_qspi_int_ack(soc_intc, BSPI_DONE);
+ 	}
+ 
+-	status = (qspi_dev_id->irqp->mask & INTR_BSPI_LR_SESSION_DONE_MASK);
++	status &= INTR_BSPI_LR_SESSION_DONE_MASK;
+ 	if (qspi->bspi_enabled && status && qspi->bspi_rf_msg_len == 0)
+ 		complete(&qspi->bspi_done);
+ 
+@@ -990,13 +1026,39 @@ static irqreturn_t bcm_qspi_bspi_lr_err_
+ {
+ 	struct bcm_qspi_dev_id *qspi_dev_id = dev_id;
+ 	struct bcm_qspi *qspi = qspi_dev_id->dev;
++	struct bcm_qspi_soc_intc *soc_intc = qspi->soc_intc;
+ 
+ 	dev_err(&qspi->pdev->dev, "BSPI INT error\n");
+ 	qspi->bspi_rf_msg_status = -EIO;
++	if (qspi->soc_intc)
++		/* clear soc interrupt */
++		soc_intc->bcm_qspi_int_ack(soc_intc, BSPI_ERR);
++
+ 	complete(&qspi->bspi_done);
+ 	return IRQ_HANDLED;
+ }
+ 
++static irqreturn_t bcm_qspi_l1_isr(int irq, void *dev_id)
++{
++	struct bcm_qspi_dev_id *qspi_dev_id = dev_id;
++	struct bcm_qspi *qspi = qspi_dev_id->dev;
++	struct bcm_qspi_soc_intc *soc_intc = qspi->soc_intc;
++	irqreturn_t ret = IRQ_NONE;
++
++	if (soc_intc) {
++		u32 status = soc_intc->bcm_qspi_get_int_status(soc_intc);
++
++		if (status & MSPI_DONE)
++			ret = bcm_qspi_mspi_l2_isr(irq, dev_id);
++		else if (status & BSPI_DONE)
++			ret = bcm_qspi_bspi_lr_l2_isr(irq, dev_id);
++		else if (status & BSPI_ERR)
++			ret = bcm_qspi_bspi_lr_err_l2_isr(irq, dev_id);
++	}
++
++	return ret;
++}
++
+ static const struct bcm_qspi_irq qspi_irq_tab[] = {
+ 	{
+ 		.irq_name = "spi_lr_fullness_reached",
+@@ -1036,6 +1098,13 @@ static const struct bcm_qspi_irq qspi_ir
+ 		.irq_handler = bcm_qspi_mspi_l2_isr,
+ 		.mask = INTR_MSPI_HALTED_MASK,
+ 	},
++	{
++		/* single muxed L1 interrupt source */
++		.irq_name = "spi_l1_intr",
++		.irq_handler = bcm_qspi_l1_isr,
++		.irq_source = MUXED_L1,
++		.mask = QSPI_INTERRUPTS_ALL,
++	},
+ };
+ 
+ static void bcm_qspi_bspi_init(struct bcm_qspi *qspi)
+@@ -1182,7 +1251,13 @@ int bcm_qspi_probe(struct platform_devic
+ 	for (val = 0; val < num_irqs; val++) {
+ 		irq = -1;
+ 		name = qspi_irq_tab[val].irq_name;
+-		irq = platform_get_irq_byname(pdev, name);
++		if (qspi_irq_tab[val].irq_source == SINGLE_L2) {
++			/* get the l2 interrupts */
++			irq = platform_get_irq_byname(pdev, name);
++		} else if (!num_ints && soc_intc) {
++			/* all mspi, bspi intrs muxed to one L1 intr */
++			irq = platform_get_irq(pdev, 0);
++		}
+ 
+ 		if (irq  >= 0) {
+ 			ret = devm_request_irq(&pdev->dev, irq,
+@@ -1209,6 +1284,17 @@ int bcm_qspi_probe(struct platform_devic
+ 		goto qspi_probe_err;
+ 	}
+ 
++	/*
++	 * Some SoCs integrate spi controller (e.g., its interrupt bits)
++	 * in specific ways
++	 */
++	if (soc_intc) {
++		qspi->soc_intc = soc_intc;
++		soc_intc->bcm_qspi_int_set(soc_intc, MSPI_DONE, true);
++	} else {
++		qspi->soc_intc = NULL;
++	}
++
+ 	qspi->clk = devm_clk_get(&pdev->dev, NULL);
+ 	if (IS_ERR(qspi->clk)) {
+ 		dev_warn(dev, "unable to get clock\n");
+@@ -1288,6 +1374,11 @@ static int __maybe_unused bcm_qspi_resum
+ 
+ 	bcm_qspi_hw_init(qspi);
+ 	bcm_qspi_chip_select(qspi, qspi->curr_cs);
++	if (qspi->soc_intc)
++		/* enable MSPI interrupt */
++		qspi->soc_intc->bcm_qspi_int_set(qspi->soc_intc, MSPI_DONE,
++						 true);
++
+ 	ret = clk_enable(qspi->clk);
+ 	if (!ret)
+ 		spi_master_resume(qspi->master);
+--- a/drivers/spi/spi-bcm-qspi.h
++++ b/drivers/spi/spi-bcm-qspi.h
+@@ -48,10 +48,26 @@
+ 	(INTR_MSPI_DONE_MASK |		       \
+ 	 INTR_MSPI_HALTED_MASK)
+ 
++#define QSPI_INTERRUPTS_ALL                    \
++	(MSPI_INTERRUPTS_ALL |		       \
++	 BSPI_LR_INTERRUPTS_ALL)
++
+ struct platform_device;
+ struct dev_pm_ops;
+ 
+-struct bcm_qspi_soc_intc;
++enum {
++	MSPI_DONE = 0x1,
++	BSPI_DONE = 0x2,
++	BSPI_ERR = 0x4,
++	MSPI_BSPI_DONE = 0x7
++};
++
++struct bcm_qspi_soc_intc {
++	void (*bcm_qspi_int_ack)(struct bcm_qspi_soc_intc *soc_intc, int type);
++	void (*bcm_qspi_int_set)(struct bcm_qspi_soc_intc *soc_intc, int type,
++				 bool en);
++	u32 (*bcm_qspi_get_int_status)(struct bcm_qspi_soc_intc *soc_intc);
++};
+ 
+ /* Read controller register*/
+ static inline u32 bcm_qspi_readl(bool be, void __iomem *addr)
+@@ -72,6 +88,22 @@ static inline void bcm_qspi_writel(bool
+ 		writel_relaxed(data, addr);
+ }
+ 
++static inline u32 get_qspi_mask(int type)
++{
++	switch (type) {
++	case MSPI_DONE:
++		return INTR_MSPI_DONE_MASK;
++	case BSPI_DONE:
++		return BSPI_LR_INTERRUPTS_ALL;
++	case MSPI_BSPI_DONE:
++		return QSPI_INTERRUPTS_ALL;
++	case BSPI_ERR:
++		return BSPI_LR_INTERRUPTS_ERROR;
++	}
++
++	return 0;
++}
++
+ /* The common driver functions to be called by the SoC platform driver */
+ int bcm_qspi_probe(struct platform_device *pdev,
+ 		   struct bcm_qspi_soc_intc *soc_intc);
+--- /dev/null
++++ b/drivers/spi/spi-iproc-qspi.c
+@@ -0,0 +1,163 @@
++/*
++ * Copyright 2016 Broadcom Limited
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ */
++
++#include <linux/device.h>
++#include <linux/io.h>
++#include <linux/ioport.h>
++#include <linux/module.h>
++#include <linux/of.h>
++#include <linux/of_address.h>
++#include <linux/platform_device.h>
++#include <linux/slab.h>
++
++#include "spi-bcm-qspi.h"
++
++#define INTR_BASE_BIT_SHIFT			0x02
++#define INTR_COUNT				0x07
++
++struct bcm_iproc_intc {
++	struct bcm_qspi_soc_intc soc_intc;
++	struct platform_device *pdev;
++	void __iomem *int_reg;
++	void __iomem *int_status_reg;
++	spinlock_t soclock;
++	bool big_endian;
++};
++
++static u32 bcm_iproc_qspi_get_l2_int_status(struct bcm_qspi_soc_intc *soc_intc)
++{
++	struct bcm_iproc_intc *priv =
++			container_of(soc_intc, struct bcm_iproc_intc, soc_intc);
++	void __iomem *mmio = priv->int_status_reg;
++	int i;
++	u32 val = 0, sts = 0;
++
++	for (i = 0; i < INTR_COUNT; i++) {
++		if (bcm_qspi_readl(priv->big_endian, mmio + (i * 4)))
++			val |= 1UL << i;
++	}
++
++	if (val & INTR_MSPI_DONE_MASK)
++		sts |= MSPI_DONE;
++
++	if (val & BSPI_LR_INTERRUPTS_ALL)
++		sts |= BSPI_DONE;
++
++	if (val & BSPI_LR_INTERRUPTS_ERROR)
++		sts |= BSPI_ERR;
++
++	return sts;
++}
++
++static void bcm_iproc_qspi_int_ack(struct bcm_qspi_soc_intc *soc_intc, int type)
++{
++	struct bcm_iproc_intc *priv =
++			container_of(soc_intc, struct bcm_iproc_intc, soc_intc);
++	void __iomem *mmio = priv->int_status_reg;
++	u32 mask = get_qspi_mask(type);
++	int i;
++
++	for (i = 0; i < INTR_COUNT; i++) {
++		if (mask & (1UL << i))
++			bcm_qspi_writel(priv->big_endian, 1, mmio + (i * 4));
++	}
++}
++
++static void bcm_iproc_qspi_int_set(struct bcm_qspi_soc_intc *soc_intc, int type,
++				   bool en)
++{
++	struct bcm_iproc_intc *priv =
++			container_of(soc_intc, struct bcm_iproc_intc, soc_intc);
++	void __iomem *mmio = priv->int_reg;
++	u32 mask = get_qspi_mask(type);
++	u32 val;
++	unsigned long flags;
++
++	spin_lock_irqsave(&priv->soclock, flags);
++
++	val = bcm_qspi_readl(priv->big_endian, mmio);
++
++	if (en)
++		val = val | (mask << INTR_BASE_BIT_SHIFT);
++	else
++		val = val & ~(mask << INTR_BASE_BIT_SHIFT);
++
++	bcm_qspi_writel(priv->big_endian, val, mmio);
++
++	spin_unlock_irqrestore(&priv->soclock, flags);
++}
++
++static int bcm_iproc_probe(struct platform_device *pdev)
++{
++	struct device *dev = &pdev->dev;
++	struct bcm_iproc_intc *priv;
++	struct bcm_qspi_soc_intc *soc_intc;
++	struct resource *res;
++
++	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
++	if (!priv)
++		return -ENOMEM;
++	soc_intc = &priv->soc_intc;
++	priv->pdev = pdev;
++
++	spin_lock_init(&priv->soclock);
++
++	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "intr_regs");
++	priv->int_reg = devm_ioremap_resource(dev, res);
++	if (IS_ERR(priv->int_reg))
++		return PTR_ERR(priv->int_reg);
++
++	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
++					   "intr_status_reg");
++	priv->int_status_reg = devm_ioremap_resource(dev, res);
++	if (IS_ERR(priv->int_status_reg))
++		return PTR_ERR(priv->int_status_reg);
++
++	priv->big_endian = of_device_is_big_endian(dev->of_node);
++
++	bcm_iproc_qspi_int_ack(soc_intc, MSPI_BSPI_DONE);
++	bcm_iproc_qspi_int_set(soc_intc, MSPI_BSPI_DONE, false);
++
++	soc_intc->bcm_qspi_int_ack = bcm_iproc_qspi_int_ack;
++	soc_intc->bcm_qspi_int_set = bcm_iproc_qspi_int_set;
++	soc_intc->bcm_qspi_get_int_status = bcm_iproc_qspi_get_l2_int_status;
++
++	return bcm_qspi_probe(pdev, soc_intc);
++}
++
++static int bcm_iproc_remove(struct platform_device *pdev)
++{
++	return bcm_qspi_remove(pdev);
++}
++
++static const struct of_device_id bcm_iproc_of_match[] = {
++	{ .compatible = "brcm,spi-nsp-qspi" },
++	{ .compatible = "brcm,spi-ns2-qspi" },
++	{},
++};
++MODULE_DEVICE_TABLE(of, bcm_iproc_of_match);
++
++static struct platform_driver bcm_iproc_driver = {
++	.probe			= bcm_iproc_probe,
++	.remove			= bcm_iproc_remove,
++	.driver = {
++		.name		= "bcm_iproc",
++		.pm		= &bcm_qspi_pm_ops,
++		.of_match_table = bcm_iproc_of_match,
++	}
++};
++module_platform_driver(bcm_iproc_driver);
++
++MODULE_LICENSE("GPL v2");
++MODULE_AUTHOR("Kamal Dasu");
++MODULE_DESCRIPTION("SPI flash driver for Broadcom iProc SoCs");