38 files changed, 2036 insertions, 1147 deletions

diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index 2e188e1127eb..e79884e997ae 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -297,9 +297,20 @@ config SPI_PPC4xx
         help
           This selects a driver for the PPC4xx SPI Controller.
 
+config SPI_PXA2XX_PXADMA
+        bool "PXA2xx SSP legacy PXA DMA API support"
+        depends on SPI_PXA2XX && ARCH_PXA
+        help
+          Enable PXA private legacy DMA API support. Note that this is
+          deprecated in favor of generic DMA engine API.
+
+config SPI_PXA2XX_DMA
+        def_bool y
+        depends on SPI_PXA2XX && !SPI_PXA2XX_PXADMA
+
 config SPI_PXA2XX
         tristate "PXA2xx SSP SPI master"
-        depends on (ARCH_PXA || (X86_32 && PCI)) && EXPERIMENTAL
+        depends on ARCH_PXA || PCI || ACPI
         select PXA_SSP if ARCH_PXA
         help
           This enables using a PXA2xx or Sodaville SSP port as a SPI master
@@ -307,7 +318,7 @@ config SPI_PXA2XX
           additional documentation can be found a Documentation/spi/pxa2xx.
 
 config SPI_PXA2XX_PCI
-        def_bool SPI_PXA2XX && X86_32 && PCI
+        def_tristate SPI_PXA2XX && PCI
 
 config SPI_RSPI
         tristate "Renesas RSPI controller"
diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile
index 64e970ba261c..e53c30941340 100644
--- a/drivers/spi/Makefile
+++ b/drivers/spi/Makefile
@@ -47,7 +47,10 @@ obj-$(CONFIG_SPI_OMAP24XX)		+= spi-omap2-mcspi.o
 obj-$(CONFIG_SPI_ORION)                 += spi-orion.o
 obj-$(CONFIG_SPI_PL022)                 += spi-pl022.o
 obj-$(CONFIG_SPI_PPC4xx)                += spi-ppc4xx.o
-obj-$(CONFIG_SPI_PXA2XX)                += spi-pxa2xx.o
+spi-pxa2xx-platform-objs                := spi-pxa2xx.o
+spi-pxa2xx-platform-$(CONFIG_SPI_PXA2XX_PXADMA) += spi-pxa2xx-pxadma.o
+spi-pxa2xx-platform-$(CONFIG_SPI_PXA2XX_DMA)    += spi-pxa2xx-dma.o
+obj-$(CONFIG_SPI_PXA2XX)                += spi-pxa2xx-platform.o
 obj-$(CONFIG_SPI_PXA2XX_PCI)            += spi-pxa2xx-pci.o
 obj-$(CONFIG_SPI_RSPI)                  += spi-rspi.o
 obj-$(CONFIG_SPI_S3C24XX)               += spi-s3c24xx-hw.o
diff --git a/drivers/spi/spi-altera.c b/drivers/spi/spi-altera.c
index 5e7314ac51e9..a537f8dffc09 100644
--- a/drivers/spi/spi-altera.c
+++ b/drivers/spi/spi-altera.c
@@ -134,7 +134,7 @@ static int altera_spi_txrx(struct spi_device *spi, struct spi_transfer *t)
         hw->tx = t->tx_buf;
         hw->rx = t->rx_buf;
         hw->count = 0;
-        hw->bytes_per_word = (t->bits_per_word ? : spi->bits_per_word) / 8;
+        hw->bytes_per_word = t->bits_per_word / 8;
         hw->len = t->len / hw->bytes_per_word;
 
         if (hw->irq >= 0) {
diff --git a/drivers/spi/spi-ath79.c b/drivers/spi/spi-ath79.c
index 9a5d7791c5fb..e504b7636058 100644
--- a/drivers/spi/spi-ath79.c
+++ b/drivers/spi/spi-ath79.c
@@ -24,17 +24,24 @@
 #include <linux/spi/spi_bitbang.h>
 #include <linux/bitops.h>
 #include <linux/gpio.h>
+#include <linux/clk.h>
+#include <linux/err.h>
 
 #include <asm/mach-ath79/ar71xx_regs.h>
 #include <asm/mach-ath79/ath79_spi_platform.h>
 
 #define DRV_NAME        "ath79-spi"
 
+#define ATH79_SPI_RRW_DELAY_FACTOR      12000
+#define MHZ                             (1000 * 1000)
+
 struct ath79_spi {
         struct spi_bitbang      bitbang;
         u32                     ioc_base;
         u32                     reg_ctrl;
         void __iomem            *base;
+        struct clk              *clk;
+        unsigned                rrw_delay;
 };
 
 static inline u32 ath79_spi_rr(struct ath79_spi *sp, unsigned reg)
@@ -52,6 +59,12 @@ static inline struct ath79_spi *ath79_spidev_to_sp(struct spi_device *spi)
         return spi_master_get_devdata(spi->master);
 }
 
+static inline void ath79_spi_delay(struct ath79_spi *sp, unsigned nsecs)
+{
+        if (nsecs > sp->rrw_delay)
+                ndelay(nsecs - sp->rrw_delay);
+}
+
 static void ath79_spi_chipselect(struct spi_device *spi, int is_active)
 {
         struct ath79_spi *sp = ath79_spidev_to_sp(spi);
@@ -83,15 +96,8 @@ static void ath79_spi_chipselect(struct spi_device *spi, int is_active)
 
 }
 
-static int ath79_spi_setup_cs(struct spi_device *spi)
+static void ath79_spi_enable(struct ath79_spi *sp)
 {
-        struct ath79_spi *sp = ath79_spidev_to_sp(spi);
-        struct ath79_spi_controller_data *cdata;
-
-        cdata = spi->controller_data;
-        if (spi->chip_select && !cdata)
-                return -EINVAL;
-
         /* enable GPIO mode */
         ath79_spi_wr(sp, AR71XX_SPI_REG_FS, AR71XX_SPI_FS_GPIO);
 
@@ -101,44 +107,48 @@ static int ath79_spi_setup_cs(struct spi_device *spi)
 
         /* TODO: setup speed? */
         ath79_spi_wr(sp, AR71XX_SPI_REG_CTRL, 0x43);
+}
 
-        if (spi->chip_select) {
-                int status = 0;
+static void ath79_spi_disable(struct ath79_spi *sp)
+{
+        /* restore CTRL register */
+        ath79_spi_wr(sp, AR71XX_SPI_REG_CTRL, sp->reg_ctrl);
+        /* disable GPIO mode */
+        ath79_spi_wr(sp, AR71XX_SPI_REG_FS, 0);
+}
 
-                status = gpio_request(cdata->gpio, dev_name(&spi->dev));
-                if (status)
-                        return status;
+static int ath79_spi_setup_cs(struct spi_device *spi)
+{
+        struct ath79_spi_controller_data *cdata;
+        int status;
 
-                status = gpio_direction_output(cdata->gpio,
-                                               spi->mode & SPI_CS_HIGH);
-                if (status) {
-                        gpio_free(cdata->gpio);
-                        return status;
-                }
-        } else {
+        cdata = spi->controller_data;
+        if (spi->chip_select && !cdata)
+                return -EINVAL;
+
+        status = 0;
+        if (spi->chip_select) {
+                unsigned long flags;
+
+                flags = GPIOF_DIR_OUT;
                 if (spi->mode & SPI_CS_HIGH)
-                        sp->ioc_base |= AR71XX_SPI_IOC_CS0;
+                        flags |= GPIOF_INIT_HIGH;
                 else
-                        sp->ioc_base &= ~AR71XX_SPI_IOC_CS0;
-                ath79_spi_wr(sp, AR71XX_SPI_REG_IOC, sp->ioc_base);
+                        flags |= GPIOF_INIT_LOW;
+
+                status = gpio_request_one(cdata->gpio, flags,
+                                          dev_name(&spi->dev));
         }
 
-        return 0;
+        return status;
 }
 
 static void ath79_spi_cleanup_cs(struct spi_device *spi)
 {
-        struct ath79_spi *sp = ath79_spidev_to_sp(spi);
-
         if (spi->chip_select) {
                 struct ath79_spi_controller_data *cdata = spi->controller_data;
                 gpio_free(cdata->gpio);
         }
-
-        /* restore CTRL register */
-        ath79_spi_wr(sp, AR71XX_SPI_REG_CTRL, sp->reg_ctrl);
-        /* disable GPIO mode */
-        ath79_spi_wr(sp, AR71XX_SPI_REG_FS, 0);
 }
 
 static int ath79_spi_setup(struct spi_device *spi)
@@ -184,7 +194,11 @@ static u32 ath79_spi_txrx_mode0(struct spi_device *spi, unsigned nsecs,
 
                 /* setup MSB (to slave) on trailing edge */
                 ath79_spi_wr(sp, AR71XX_SPI_REG_IOC, out);
+                ath79_spi_delay(sp, nsecs);
                 ath79_spi_wr(sp, AR71XX_SPI_REG_IOC, out | AR71XX_SPI_IOC_CLK);
+                ath79_spi_delay(sp, nsecs);
+                if (bits == 1)
+                        ath79_spi_wr(sp, AR71XX_SPI_REG_IOC, out);
 
                 word <<= 1;
         }
@@ -198,6 +212,7 @@ static int ath79_spi_probe(struct platform_device *pdev)
         struct ath79_spi *sp;
         struct ath79_spi_platform_data *pdata;
         struct resource *r;
+        unsigned long rate;
         int ret;
 
         master = spi_alloc_master(&pdev->dev, sizeof(*sp));
@@ -236,12 +251,39 @@ static int ath79_spi_probe(struct platform_device *pdev)
                 goto err_put_master;
         }
 
+        sp->clk = clk_get(&pdev->dev, "ahb");
+        if (IS_ERR(sp->clk)) {
+                ret = PTR_ERR(sp->clk);
+                goto err_unmap;
+        }
+
+        ret = clk_enable(sp->clk);
+        if (ret)
+                goto err_clk_put;
+
+        rate = DIV_ROUND_UP(clk_get_rate(sp->clk), MHZ);
+        if (!rate) {
+                ret = -EINVAL;
+                goto err_clk_disable;
+        }
+
+        sp->rrw_delay = ATH79_SPI_RRW_DELAY_FACTOR / rate;
+        dev_dbg(&pdev->dev, "register read/write delay is %u nsecs\n",
+                sp->rrw_delay);
+
+        ath79_spi_enable(sp);
         ret = spi_bitbang_start(&sp->bitbang);
         if (ret)
-                goto err_unmap;
+                goto err_disable;
 
         return 0;
 
+err_disable:
+        ath79_spi_disable(sp);
+err_clk_disable:
+        clk_disable(sp->clk);
+err_clk_put:
+        clk_put(sp->clk);
 err_unmap:
         iounmap(sp->base);
 err_put_master:
@@ -256,6 +298,9 @@ static int ath79_spi_remove(struct platform_device *pdev)
         struct ath79_spi *sp = platform_get_drvdata(pdev);
 
         spi_bitbang_stop(&sp->bitbang);
+        ath79_spi_disable(sp);
+        clk_disable(sp->clk);
+        clk_put(sp->clk);
         iounmap(sp->base);
         platform_set_drvdata(pdev, NULL);
         spi_master_put(sp->bitbang.master);
@@ -263,9 +308,15 @@ static int ath79_spi_remove(struct platform_device *pdev)
         return 0;
 }
 
+static void ath79_spi_shutdown(struct platform_device *pdev)
+{
+        ath79_spi_remove(pdev);
+}
+
 static struct platform_driver ath79_spi_driver = {
         .probe          = ath79_spi_probe,
         .remove         = ath79_spi_remove,
+        .shutdown       = ath79_spi_shutdown,
         .driver         = {
                 .name   = DRV_NAME,
                 .owner  = THIS_MODULE,
diff --git a/drivers/spi/spi-atmel.c b/drivers/spi/spi-atmel.c
index ab34497bcfee..656d137db253 100644
--- a/drivers/spi/spi-atmel.c
+++ b/drivers/spi/spi-atmel.c
@@ -1088,7 +1088,7 @@ static struct platform_driver atmel_spi_driver = {
         .suspend        = atmel_spi_suspend,
         .resume         = atmel_spi_resume,
         .probe          = atmel_spi_probe,
-        .remove         = __exit_p(atmel_spi_remove),
+        .remove         = atmel_spi_remove,
 };
 module_platform_driver(atmel_spi_driver);
 
diff --git a/drivers/spi/spi-au1550.c b/drivers/spi/spi-au1550.c
index 4de66d1cfe51..44dd34b6ad09 100644
--- a/drivers/spi/spi-au1550.c
+++ b/drivers/spi/spi-au1550.c
@@ -717,7 +717,7 @@ static void au1550_spi_bits_handlers_set(struct au1550_spi *hw, int bpw)
         }
 }
 
-static void __init au1550_spi_setup_psc_as_spi(struct au1550_spi *hw)
+static void au1550_spi_setup_psc_as_spi(struct au1550_spi *hw)
 {
         u32 stat, cfg;
 
@@ -766,7 +766,7 @@ static void __init au1550_spi_setup_psc_as_spi(struct au1550_spi *hw)
 }
 
 
-static int __init au1550_spi_probe(struct platform_device *pdev)
+static int au1550_spi_probe(struct platform_device *pdev)
 {
         struct au1550_spi *hw;
         struct spi_master *master;
@@ -968,7 +968,7 @@ err_nomem:
         return err;
 }
 
-static int __exit au1550_spi_remove(struct platform_device *pdev)
+static int au1550_spi_remove(struct platform_device *pdev)
 {
         struct au1550_spi *hw = platform_get_drvdata(pdev);
 
@@ -997,7 +997,7 @@ static int __exit au1550_spi_remove(struct platform_device *pdev)
 MODULE_ALIAS("platform:au1550-spi");
 
 static struct platform_driver au1550_spi_drv = {
-        .remove = __exit_p(au1550_spi_remove),
+        .remove = au1550_spi_remove,
         .driver = {
                 .name = "au1550-spi",
                 .owner = THIS_MODULE,
diff --git a/drivers/spi/spi-bcm63xx.c b/drivers/spi/spi-bcm63xx.c
index f44ab5508535..9578af782a77 100644
--- a/drivers/spi/spi-bcm63xx.c
+++ b/drivers/spi/spi-bcm63xx.c
@@ -37,6 +37,8 @@
 
 #define PFX             KBUILD_MODNAME
 
+#define BCM63XX_SPI_MAX_PREPEND         15
+
 struct bcm63xx_spi {
         struct completion       done;
 
@@ -49,16 +51,10 @@ struct bcm63xx_spi {
         unsigned int            msg_type_shift;
         unsigned int            msg_ctl_width;
 
-        /* Data buffers */
-        const unsigned char     *tx_ptr;
-        unsigned char           *rx_ptr;
-
         /* data iomem */
         u8 __iomem              *tx_io;
         const u8 __iomem        *rx_io;
 
-        int                     remaining_bytes;
-
         struct clk              *clk;
         struct platform_device  *pdev;
 };
@@ -175,24 +171,17 @@ static int bcm63xx_spi_setup(struct spi_device *spi)
         return 0;
 }
 
-/* Fill the TX FIFO with as many bytes as possible */
-static void bcm63xx_spi_fill_tx_fifo(struct bcm63xx_spi *bs)
-{
-        u8 size;
-
-        /* Fill the Tx FIFO with as many bytes as possible */
-        size = bs->remaining_bytes < bs->fifo_size ? bs->remaining_bytes :
-                bs->fifo_size;
-        memcpy_toio(bs->tx_io, bs->tx_ptr, size);
-        bs->remaining_bytes -= size;
-}
-
-static unsigned int bcm63xx_txrx_bufs(struct spi_device *spi,
-                                        struct spi_transfer *t)
+static int bcm63xx_txrx_bufs(struct spi_device *spi, struct spi_transfer *first,
+                                unsigned int num_transfers)
 {
         struct bcm63xx_spi *bs = spi_master_get_devdata(spi->master);
         u16 msg_ctl;
         u16 cmd;
+        u8 rx_tail;
+        unsigned int i, timeout = 0, prepend_len = 0, len = 0;
+        struct spi_transfer *t = first;
+        bool do_rx = false;
+        bool do_tx = false;
 
         /* Disable the CMD_DONE interrupt */
         bcm_spi_writeb(bs, 0, SPI_INT_MASK);
@@ -200,25 +189,45 @@ static unsigned int bcm63xx_txrx_bufs(struct spi_device *spi,
         dev_dbg(&spi->dev, "txrx: tx %p, rx %p, len %d\n",
                 t->tx_buf, t->rx_buf, t->len);
 
-        /* Transmitter is inhibited */
-        bs->tx_ptr = t->tx_buf;
-        bs->rx_ptr = t->rx_buf;
+        if (num_transfers > 1 && t->tx_buf && t->len <= BCM63XX_SPI_MAX_PREPEND)
+                prepend_len = t->len;
 
-        if (t->tx_buf) {
-                bs->remaining_bytes = t->len;
-                bcm63xx_spi_fill_tx_fifo(bs);
+        /* prepare the buffer */
+        for (i = 0; i < num_transfers; i++) {
+                if (t->tx_buf) {
+                        do_tx = true;
+                        memcpy_toio(bs->tx_io + len, t->tx_buf, t->len);
+
+                        /* don't prepend more than one tx */
+                        if (t != first)
+                                prepend_len = 0;
+                }
+
+                if (t->rx_buf) {
+                        do_rx = true;
+                        /* prepend is half-duplex write only */
+                        if (t == first)
+                                prepend_len = 0;
+                }
+
+                len += t->len;
+
+                t = list_entry(t->transfer_list.next, struct spi_transfer,
+                               transfer_list);
         }
 
+        len -= prepend_len;
+
         init_completion(&bs->done);
 
         /* Fill in the Message control register */
-        msg_ctl = (t->len << SPI_BYTE_CNT_SHIFT);
+        msg_ctl = (len << SPI_BYTE_CNT_SHIFT);
 
-        if (t->rx_buf && t->tx_buf)
+        if (do_rx && do_tx && prepend_len == 0)
                 msg_ctl |= (SPI_FD_RW << bs->msg_type_shift);
-        else if (t->rx_buf)
+        else if (do_rx)
                 msg_ctl |= (SPI_HD_R << bs->msg_type_shift);
-        else if (t->tx_buf)
+        else if (do_tx)
                 msg_ctl |= (SPI_HD_W << bs->msg_type_shift);
 
         switch (bs->msg_ctl_width) {
@@ -232,14 +241,41 @@ static unsigned int bcm63xx_txrx_bufs(struct spi_device *spi,
 
         /* Issue the transfer */
         cmd = SPI_CMD_START_IMMEDIATE;
-        cmd |= (0 << SPI_CMD_PREPEND_BYTE_CNT_SHIFT);
+        cmd |= (prepend_len << SPI_CMD_PREPEND_BYTE_CNT_SHIFT);
         cmd |= (spi->chip_select << SPI_CMD_DEVICE_ID_SHIFT);
         bcm_spi_writew(bs, cmd, SPI_CMD);
 
         /* Enable the CMD_DONE interrupt */
         bcm_spi_writeb(bs, SPI_INTR_CMD_DONE, SPI_INT_MASK);
 
-        return t->len - bs->remaining_bytes;
+        timeout = wait_for_completion_timeout(&bs->done, HZ);
+        if (!timeout)
+                return -ETIMEDOUT;
+
+        /* read out all data */
+        rx_tail = bcm_spi_readb(bs, SPI_RX_TAIL);
+
+        if (do_rx && rx_tail != len)
+                return -EIO;
+
+        if (!rx_tail)
+                return 0;
+
+        len = 0;
+        t = first;
+        /* Read out all the data */
+        for (i = 0; i < num_transfers; i++) {
+                if (t->rx_buf)
+                        memcpy_fromio(t->rx_buf, bs->rx_io + len, t->len);
+
+                if (t != first || prepend_len == 0)
+                        len += t->len;
+
+                t = list_entry(t->transfer_list.next, struct spi_transfer,
+                               transfer_list);
+        }
+
+        return 0;
 }
 
 static int bcm63xx_spi_prepare_transfer(struct spi_master *master)
@@ -264,41 +300,76 @@ static int bcm63xx_spi_transfer_one(struct spi_master *master,
                                         struct spi_message *m)
 {
         struct bcm63xx_spi *bs = spi_master_get_devdata(master);
-        struct spi_transfer *t;
+        struct spi_transfer *t, *first = NULL;
         struct spi_device *spi = m->spi;
         int status = 0;
-        unsigned int timeout = 0;
-
+        unsigned int n_transfers = 0, total_len = 0;
+        bool can_use_prepend = false;
+
+        /*
+         * This SPI controller does not support keeping CS active after a
+         * transfer.
+         * Work around this by merging as many transfers we can into one big
+         * full-duplex transfers.
+         */
         list_for_each_entry(t, &m->transfers, transfer_list) {
-                unsigned int len = t->len;
-                u8 rx_tail;
-
                 status = bcm63xx_spi_check_transfer(spi, t);
                 if (status < 0)
                         goto exit;
 
-                /* configure adapter for a new transfer */
-                bcm63xx_spi_setup_transfer(spi, t);
+                if (!first)
+                        first = t;
+
+                n_transfers++;
+                total_len += t->len;
+
+                if (n_transfers == 2 && !first->rx_buf && !t->tx_buf &&
+                    first->len <= BCM63XX_SPI_MAX_PREPEND)
+                        can_use_prepend = true;
+                else if (can_use_prepend && t->tx_buf)
+                        can_use_prepend = false;
+
+                /* we can only transfer one fifo worth of data */
+                if ((can_use_prepend &&
+                     total_len > (bs->fifo_size + BCM63XX_SPI_MAX_PREPEND)) ||
+                    (!can_use_prepend && total_len > bs->fifo_size)) {
+                        dev_err(&spi->dev, "unable to do transfers larger than FIFO size (%i > %i)\n",
+                                total_len, bs->fifo_size);
+                        status = -EINVAL;
+                        goto exit;
+                }
+
+                /* all combined transfers have to have the same speed */
+                if (t->speed_hz != first->speed_hz) {
+                        dev_err(&spi->dev, "unable to change speed between transfers\n");
+                        status = -EINVAL;
+                        goto exit;
+                }
 
-                while (len) {
-                        /* send the data */
-                        len -= bcm63xx_txrx_bufs(spi, t);
+                /* CS will be deasserted directly after transfer */
+                if (t->delay_usecs) {
+                        dev_err(&spi->dev, "unable to keep CS asserted after transfer\n");
+                        status = -EINVAL;
+                        goto exit;
+                }
+
+                if (t->cs_change ||
+                    list_is_last(&t->transfer_list, &m->transfers)) {
+                        /* configure adapter for a new transfer */
+                        bcm63xx_spi_setup_transfer(spi, first);
 
-                        timeout = wait_for_completion_timeout(&bs->done, HZ);
-                        if (!timeout) {
-                                status = -ETIMEDOUT;
+                        /* send the data */
+                        status = bcm63xx_txrx_bufs(spi, first, n_transfers);
+                        if (status)
                                 goto exit;
-                        }
 
-                        /* read out all data */
-                        rx_tail = bcm_spi_readb(bs, SPI_RX_TAIL);
+                        m->actual_length += total_len;
 
-                        /* Read out all the data */
-                        if (rx_tail)
-                                memcpy_fromio(bs->rx_ptr, bs->rx_io, rx_tail);
+                        first = NULL;
+                        n_transfers = 0;
+                        total_len = 0;
+                        can_use_prepend = false;
                 }
-
-                m->actual_length += t->len;
         }
 exit:
         m->status = status;
diff --git a/drivers/spi/spi-bfin-sport.c b/drivers/spi/spi-bfin-sport.c
index ac7ffca7ba47..39b0d1711b4e 100644
--- a/drivers/spi/spi-bfin-sport.c
+++ b/drivers/spi/spi-bfin-sport.c
@@ -416,8 +416,7 @@ bfin_sport_spi_pump_transfers(unsigned long data)
         drv_data->cs_change = transfer->cs_change;
 
         /* Bits per word setup */
-        bits_per_word = transfer->bits_per_word ? :
-                message->spi->bits_per_word ? : 8;
+        bits_per_word = transfer->bits_per_word;
         if (bits_per_word % 16 == 0)
                 drv_data->ops = &bfin_sport_transfer_ops_u16;
         else
diff --git a/drivers/spi/spi-bfin5xx.c b/drivers/spi/spi-bfin5xx.c
index 0429d833f75b..317f564c899c 100644
--- a/drivers/spi/spi-bfin5xx.c
+++ b/drivers/spi/spi-bfin5xx.c
@@ -642,8 +642,7 @@ static void bfin_spi_pump_transfers(unsigned long data)
         drv_data->cs_change = transfer->cs_change;
 
         /* Bits per word setup */
-        bits_per_word = transfer->bits_per_word ? :
-                message->spi->bits_per_word ? : 8;
+        bits_per_word = transfer->bits_per_word;
         if (bits_per_word % 16 == 0) {
                 drv_data->n_bytes = bits_per_word/8;
                 drv_data->len = (transfer->len) >> 1;
@@ -1274,7 +1273,7 @@ static int bfin_spi_destroy_queue(struct bfin_spi_master_data *drv_data)
         return 0;
 }
 
-static int __init bfin_spi_probe(struct platform_device *pdev)
+static int bfin_spi_probe(struct platform_device *pdev)
 {
         struct device *dev = &pdev->dev;
         struct bfin5xx_spi_master *platform_info;
diff --git a/drivers/spi/spi-bitbang.c b/drivers/spi/spi-bitbang.c
index 8b3d8efafd3c..a63d7da3bfe2 100644
--- a/drivers/spi/spi-bitbang.c
+++ b/drivers/spi/spi-bitbang.c
@@ -69,7 +69,7 @@ static unsigned bitbang_txrx_8(
         unsigned                ns,
         struct spi_transfer     *t
 ) {
-        unsigned                bits = t->bits_per_word ? : spi->bits_per_word;
+        unsigned                bits = t->bits_per_word;
         unsigned                count = t->len;
         const u8                *tx = t->tx_buf;
         u8                      *rx = t->rx_buf;
@@ -95,7 +95,7 @@ static unsigned bitbang_txrx_16(
         unsigned                ns,
         struct spi_transfer     *t
 ) {
-        unsigned                bits = t->bits_per_word ? : spi->bits_per_word;
+        unsigned                bits = t->bits_per_word;
         unsigned                count = t->len;
         const u16               *tx = t->tx_buf;
         u16                     *rx = t->rx_buf;
@@ -121,7 +121,7 @@ static unsigned bitbang_txrx_32(
         unsigned                ns,
         struct spi_transfer     *t
 ) {
-        unsigned                bits = t->bits_per_word ? : spi->bits_per_word;
+        unsigned                bits = t->bits_per_word;
         unsigned                count = t->len;
         const u32               *tx = t->tx_buf;
         u32                     *rx = t->rx_buf;
@@ -427,40 +427,41 @@ EXPORT_SYMBOL_GPL(spi_bitbang_transfer);
  */
 int spi_bitbang_start(struct spi_bitbang *bitbang)
 {
-        int     status;
+        struct spi_master *master = bitbang->master;
+        int status;
 
-        if (!bitbang->master || !bitbang->chipselect)
+        if (!master || !bitbang->chipselect)
                 return -EINVAL;
 
         INIT_WORK(&bitbang->work, bitbang_work);
         spin_lock_init(&bitbang->lock);
         INIT_LIST_HEAD(&bitbang->queue);
 
-        if (!bitbang->master->mode_bits)
-                bitbang->master->mode_bits = SPI_CPOL | SPI_CPHA | bitbang->flags;
+        if (!master->mode_bits)
+                master->mode_bits = SPI_CPOL | SPI_CPHA | bitbang->flags;
 
-        if (!bitbang->master->transfer)
-                bitbang->master->transfer = spi_bitbang_transfer;
+        if (!master->transfer)
+                master->transfer = spi_bitbang_transfer;
         if (!bitbang->txrx_bufs) {
                 bitbang->use_dma = 0;
                 bitbang->txrx_bufs = spi_bitbang_bufs;
-                if (!bitbang->master->setup) {
+                if (!master->setup) {
                         if (!bitbang->setup_transfer)
                                 bitbang->setup_transfer =
                                          spi_bitbang_setup_transfer;
-                        bitbang->master->setup = spi_bitbang_setup;
-                        bitbang->master->cleanup = spi_bitbang_cleanup;
+                        master->setup = spi_bitbang_setup;
+                        master->cleanup = spi_bitbang_cleanup;
                 }
-        } else if (!bitbang->master->setup)
+        } else if (!master->setup)
                 return -EINVAL;
-        if (bitbang->master->transfer == spi_bitbang_transfer &&
+        if (master->transfer == spi_bitbang_transfer &&
                         !bitbang->setup_transfer)
                 return -EINVAL;
 
         /* this task is the only thing to touch the SPI bits */
         bitbang->busy = 0;
         bitbang->workqueue = create_singlethread_workqueue(
-                        dev_name(bitbang->master->dev.parent));
+                        dev_name(master->dev.parent));
         if (bitbang->workqueue == NULL) {
                 status = -EBUSY;
                 goto err1;
@@ -469,7 +470,7 @@ int spi_bitbang_start(struct spi_bitbang *bitbang)
         /* driver may get busy before register() returns, especially
          * if someone registered boardinfo for devices
          */
-        status = spi_register_master(bitbang->master);
+        status = spi_register_master(master);
         if (status < 0)
                 goto err2;
 
diff --git a/drivers/spi/spi-clps711x.c b/drivers/spi/spi-clps711x.c
index 1366c4620d5d..a11cbf02691a 100644
--- a/drivers/spi/spi-clps711x.c
+++ b/drivers/spi/spi-clps711x.c
@@ -68,7 +68,7 @@ static int spi_clps711x_setup_xfer(struct spi_device *spi,
                                    struct spi_transfer *xfer)
 {
         u32 speed = xfer->speed_hz ? : spi->max_speed_hz;
-        u8 bpw = xfer->bits_per_word ? : spi->bits_per_word;
+        u8 bpw = xfer->bits_per_word;
         struct spi_clps711x_data *hw = spi_master_get_devdata(spi->master);
 
         if (bpw != 8) {
diff --git a/drivers/spi/spi-coldfire-qspi.c b/drivers/spi/spi-coldfire-qspi.c
index 58466b810da4..7b5cc9e4e94d 100644
--- a/drivers/spi/spi-coldfire-qspi.c
+++ b/drivers/spi/spi-coldfire-qspi.c
@@ -329,8 +329,7 @@ static int mcfqspi_transfer_one_message(struct spi_master *master,
                 mcfqspi_cs_select(mcfqspi, spi->chip_select, cs_high);
 
                 mcfqspi_wr_qir(mcfqspi, MCFQSPI_QIR_SPIFE);
-                if ((t->bits_per_word ? t->bits_per_word :
-                                        spi->bits_per_word) == 8)
+                if (t->bits_per_word == 8)
                         mcfqspi_transfer_msg8(mcfqspi, t->len, t->tx_buf,
                                         t->rx_buf);
                 else
diff --git a/drivers/spi/spi-davinci.c b/drivers/spi/spi-davinci.c
index 13661e129d96..8234d2259722 100644
--- a/drivers/spi/spi-davinci.c
+++ b/drivers/spi/spi-davinci.c
@@ -28,6 +28,8 @@
 #include <linux/dmaengine.h>
 #include <linux/dma-mapping.h>
 #include <linux/edma.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
 #include <linux/spi/spi.h>
 #include <linux/spi/spi_bitbang.h>
 #include <linux/slab.h>
@@ -135,7 +137,7 @@ struct davinci_spi {
         int                     dma_rx_chnum;
         int                     dma_tx_chnum;
 
-        struct davinci_spi_platform_data *pdata;
+        struct davinci_spi_platform_data pdata;
 
         void                    (*get_rx)(u32 rx_data, struct davinci_spi *);
         u32                     (*get_tx)(struct davinci_spi *);
@@ -213,7 +215,7 @@ static void davinci_spi_chipselect(struct spi_device *spi, int value)
         bool gpio_chipsel = false;
 
         dspi = spi_master_get_devdata(spi->master);
-        pdata = dspi->pdata;
+        pdata = &dspi->pdata;
 
         if (pdata->chip_sel && chip_sel < pdata->num_chipselect &&
                                 pdata->chip_sel[chip_sel] != SPI_INTERN_CS)
@@ -392,7 +394,7 @@ static int davinci_spi_setup(struct spi_device *spi)
         struct davinci_spi_platform_data *pdata;
 
         dspi = spi_master_get_devdata(spi->master);
-        pdata = dspi->pdata;
+        pdata = &dspi->pdata;
 
         /* if bits per word length is zero then set it default 8 */
         if (!spi->bits_per_word)
@@ -534,7 +536,7 @@ static int davinci_spi_bufs(struct spi_device *spi, struct spi_transfer *t)
         struct scatterlist sg_rx, sg_tx;
 
         dspi = spi_master_get_devdata(spi->master);
-        pdata = dspi->pdata;
+        pdata = &dspi->pdata;
         spicfg = (struct davinci_spi_config *)spi->controller_data;
         if (!spicfg)
                 spicfg = &davinci_spi_default_cfg;
@@ -700,6 +702,19 @@ err_alloc_dummy_buf:
 }
 
 /**
+ * dummy_thread_fn - dummy thread function
+ * @irq: IRQ number for this SPI Master
+ * @context_data: structure for SPI Master controller davinci_spi
+ *
+ * This is to satisfy the request_threaded_irq() API so that the irq
+ * handler is called in interrupt context.
+ */
+static irqreturn_t dummy_thread_fn(s32 irq, void *data)
+{
+        return IRQ_HANDLED;
+}
+
+/**
  * davinci_spi_irq - Interrupt handler for SPI Master Controller
  * @irq: IRQ number for this SPI Master
  * @context_data: structure for SPI Master controller davinci_spi
@@ -758,6 +773,70 @@ rx_dma_failed:
         return r;
 }
 
+#if defined(CONFIG_OF)
+static const struct of_device_id davinci_spi_of_match[] = {
+        {
+                .compatible = "ti,dm644x-spi",
+        },
+        {
+                .compatible = "ti,da8xx-spi",
+                .data = (void *)SPI_VERSION_2,
+        },
+        { },
+};
+MODULE_DEVICE_TABLE(of, davini_spi_of_match);
+
+/**
+ * spi_davinci_get_pdata - Get platform data from DTS binding
+ * @pdev: ptr to platform data
+ * @dspi: ptr to driver data
+ *
+ * Parses and populates pdata in dspi from device tree bindings.
+ *
+ * NOTE: Not all platform data params are supported currently.
+ */
+static int spi_davinci_get_pdata(struct platform_device *pdev,
+                        struct davinci_spi *dspi)
+{
+        struct device_node *node = pdev->dev.of_node;
+        struct davinci_spi_platform_data *pdata;
+        unsigned int num_cs, intr_line = 0;
+        const struct of_device_id *match;
+
+        pdata = &dspi->pdata;
+
+        pdata->version = SPI_VERSION_1;
+        match = of_match_device(of_match_ptr(davinci_spi_of_match),
+                                &pdev->dev);
+        if (!match)
+                return -ENODEV;
+
+        /* match data has the SPI version number for SPI_VERSION_2 */
+        if (match->data == (void *)SPI_VERSION_2)
+                pdata->version = SPI_VERSION_2;
+
+        /*
+         * default num_cs is 1 and all chipsel are internal to the chip
+         * indicated by chip_sel being NULL. GPIO based CS is not
+         * supported yet in DT bindings.
+         */
+        num_cs = 1;
+        of_property_read_u32(node, "num-cs", &num_cs);
+        pdata->num_chipselect = num_cs;
+        of_property_read_u32(node, "ti,davinci-spi-intr-line", &intr_line);
+        pdata->intr_line = intr_line;
+        return 0;
+}
+#else
+#define davinci_spi_of_match NULL
+static struct davinci_spi_platform_data
+        *spi_davinci_get_pdata(struct platform_device *pdev,
+                struct davinci_spi *dspi)
+{
+        return -ENODEV;
+}
+#endif
+
 /**
  * davinci_spi_probe - probe function for SPI Master Controller
  * @pdev: platform_device structure which contains plateform specific data
@@ -780,12 +859,6 @@ static int davinci_spi_probe(struct platform_device *pdev)
         int i = 0, ret = 0;
         u32 spipc0;
 
-        pdata = pdev->dev.platform_data;
-        if (pdata == NULL) {
-                ret = -ENODEV;
-                goto err;
-        }
-
         master = spi_alloc_master(&pdev->dev, sizeof(struct davinci_spi));
         if (master == NULL) {
                 ret = -ENOMEM;
@@ -800,6 +873,19 @@ static int davinci_spi_probe(struct platform_device *pdev)
                 goto free_master;
         }
 
+        if (pdev->dev.platform_data) {
+                pdata = pdev->dev.platform_data;
+                dspi->pdata = *pdata;
+        } else {
+                /* update dspi pdata with that from the DT */
+                ret = spi_davinci_get_pdata(pdev, dspi);
+                if (ret < 0)
+                        goto free_master;
+        }
+
+        /* pdata in dspi is now updated and point pdata to that */
+        pdata = &dspi->pdata;
+
         r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
         if (r == NULL) {
                 ret = -ENOENT;
@@ -807,7 +893,6 @@ static int davinci_spi_probe(struct platform_device *pdev)
         }
 
         dspi->pbase = r->start;
-        dspi->pdata = pdata;
 
         mem = request_mem_region(r->start, resource_size(r), pdev->name);
         if (mem == NULL) {
@@ -827,8 +912,8 @@ static int davinci_spi_probe(struct platform_device *pdev)
                 goto unmap_io;
         }
 
-        ret = request_irq(dspi->irq, davinci_spi_irq, 0, dev_name(&pdev->dev),
-                                                                        dspi);
+        ret = request_threaded_irq(dspi->irq, davinci_spi_irq, dummy_thread_fn,
+                                 0, dev_name(&pdev->dev), dspi);
         if (ret)
                 goto unmap_io;
 
@@ -843,8 +928,9 @@ static int davinci_spi_probe(struct platform_device *pdev)
                 ret = -ENODEV;
                 goto put_master;
         }
-        clk_enable(dspi->clk);
+        clk_prepare_enable(dspi->clk);
 
+        master->dev.of_node = pdev->dev.of_node;
         master->bus_num = pdev->id;
         master->num_chipselect = pdata->num_chipselect;
         master->setup = davinci_spi_setup;
@@ -927,7 +1013,7 @@ free_dma:
         dma_release_channel(dspi->dma_rx);
         dma_release_channel(dspi->dma_tx);
 free_clk:
-        clk_disable(dspi->clk);
+        clk_disable_unprepare(dspi->clk);
         clk_put(dspi->clk);
 put_master:
         spi_master_put(master);
@@ -963,7 +1049,7 @@ static int davinci_spi_remove(struct platform_device *pdev)
 
         spi_bitbang_stop(&dspi->bitbang);
 
-        clk_disable(dspi->clk);
+        clk_disable_unprepare(dspi->clk);
         clk_put(dspi->clk);
         spi_master_put(master);
         free_irq(dspi->irq, dspi);
@@ -978,6 +1064,7 @@ static struct platform_driver davinci_spi_driver = {
         .driver = {
                 .name = "spi_davinci",
                 .owner = THIS_MODULE,
+                .of_match_table = davinci_spi_of_match,
         },
         .probe = davinci_spi_probe,
         .remove = davinci_spi_remove,
diff --git a/drivers/spi/spi-ep93xx.c b/drivers/spi/spi-ep93xx.c
index acb1e1935c5a..aecbff16ad60 100644
--- a/drivers/spi/spi-ep93xx.c
+++ b/drivers/spi/spi-ep93xx.c
@@ -446,7 +446,7 @@ static inline int bits_per_word(const struct ep93xx_spi *espi)
         struct spi_message *msg = espi->current_msg;
         struct spi_transfer *t = msg->state;
 
-        return t->bits_per_word ? t->bits_per_word : msg->spi->bits_per_word;
+        return t->bits_per_word;
 }
 
 static void ep93xx_do_write(struct ep93xx_spi *espi, struct spi_transfer *t)
diff --git a/drivers/spi/spi-falcon.c b/drivers/spi/spi-falcon.c
index 6a6f62ec2840..c7a74f0ef892 100644
--- a/drivers/spi/spi-falcon.c
+++ b/drivers/spi/spi-falcon.c
@@ -398,7 +398,7 @@ static int falcon_sflash_xfer_one(struct spi_master *master,
         }
 
         m->status = ret;
-        m->complete(m->context);
+        spi_finalize_current_message(master);
 
         return 0;
 }
@@ -423,6 +423,7 @@ static int falcon_sflash_probe(struct platform_device *pdev)
 
         master->mode_bits = SPI_MODE_3;
         master->num_chipselect = 1;
+        master->flags = SPI_MASTER_HALF_DUPLEX;
         master->bus_num = -1;
         master->setup = falcon_sflash_setup;
         master->prepare_transfer_hardware = falcon_sflash_prepare_xfer;
diff --git a/drivers/spi/spi-fsl-spi.c b/drivers/spi/spi-fsl-spi.c
index 1a7f6359d998..086a9eef2e05 100644
--- a/drivers/spi/spi-fsl-spi.c
+++ b/drivers/spi/spi-fsl-spi.c
@@ -947,12 +947,12 @@ static int of_fsl_spi_get_chipselects(struct device *dev)
         struct device_node *np = dev->of_node;
         struct fsl_spi_platform_data *pdata = dev->platform_data;
         struct mpc8xxx_spi_probe_info *pinfo = to_of_pinfo(pdata);
-        unsigned int ngpios;
+        int ngpios;
         int i = 0;
         int ret;
 
         ngpios = of_gpio_count(np);
-        if (!ngpios) {
+        if (ngpios <= 0) {
                 /*
                  * SPI w/o chip-select line. One SPI device is still permitted
                  * though.
diff --git a/drivers/spi/spi-gpio.c b/drivers/spi/spi-gpio.c
index c7cf0b7a069b..9ddef55a7165 100644
--- a/drivers/spi/spi-gpio.c
+++ b/drivers/spi/spi-gpio.c
@@ -365,9 +365,26 @@ static int spi_gpio_probe_dt(struct platform_device *pdev)
         if (!pdata)
                 return -ENOMEM;
 
-        pdata->sck = of_get_named_gpio(np, "gpio-sck", 0);
-        pdata->miso = of_get_named_gpio(np, "gpio-miso", 0);
-        pdata->mosi = of_get_named_gpio(np, "gpio-mosi", 0);
+        ret = of_get_named_gpio(np, "gpio-sck", 0);
+        if (ret < 0) {
+                dev_err(&pdev->dev, "gpio-sck property not found\n");
+                goto error_free;
+        }
+        pdata->sck = ret;
+
+        ret = of_get_named_gpio(np, "gpio-miso", 0);
+        if (ret < 0) {
+                dev_info(&pdev->dev, "gpio-miso property not found, switching to no-rx mode\n");
+                pdata->miso = SPI_GPIO_NO_MISO;
+        } else
+                pdata->miso = ret;
+
+        ret = of_get_named_gpio(np, "gpio-mosi", 0);
+        if (ret < 0) {
+                dev_info(&pdev->dev, "gpio-mosi property not found, switching to no-tx mode\n");
+                pdata->mosi = SPI_GPIO_NO_MOSI;
+        } else
+                pdata->mosi = ret;
 
         ret = of_property_read_u32(np, "num-chipselects", &tmp);
         if (ret < 0) {
diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
index 904913290aa5..0befeeb522f4 100644
--- a/drivers/spi/spi-imx.c
+++ b/drivers/spi/spi-imx.c
@@ -949,3 +949,4 @@ module_platform_driver(spi_imx_driver);
 MODULE_DESCRIPTION("SPI Master Controller driver");
 MODULE_AUTHOR("Sascha Hauer, Pengutronix");
 MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:" DRIVER_NAME);
diff --git a/drivers/spi/spi-mpc512x-psc.c b/drivers/spi/spi-mpc512x-psc.c
index cb3a3106bd4f..89480b281d74 100644
--- a/drivers/spi/spi-mpc512x-psc.c
+++ b/drivers/spi/spi-mpc512x-psc.c
@@ -438,6 +438,7 @@ static int mpc512x_psc_spi_do_probe(struct device *dev, u32 regaddr,
                 master->num_chipselect = pdata->max_chipselect;
         }
 
+        master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH | SPI_LSB_FIRST;
         master->setup = mpc512x_psc_spi_setup;
         master->transfer = mpc512x_psc_spi_transfer;
         master->cleanup = mpc512x_psc_spi_cleanup;
@@ -522,17 +523,11 @@ static int mpc512x_psc_spi_of_probe(struct platform_device *op)
         regaddr64 = of_translate_address(op->dev.of_node, regaddr_p);
 
         /* get PSC id (0..11, used by port_config) */
-        if (op->dev.platform_data == NULL) {
-                const u32 *psc_nump;
-
-                psc_nump = of_get_property(op->dev.of_node, "cell-index", NULL);
-                if (!psc_nump || *psc_nump > 11) {
-                        dev_err(&op->dev, "mpc512x_psc_spi: Device node %s "
-                                "has invalid cell-index property\n",
-                                op->dev.of_node->full_name);
-                        return -EINVAL;
-                }
-                id = *psc_nump;
+        id = of_alias_get_id(op->dev.of_node, "spi");
+        if (id < 0) {
+                dev_err(&op->dev, "no alias id for %s\n",
+                        op->dev.of_node->full_name);
+                return id;
         }
 
         return mpc512x_psc_spi_do_probe(&op->dev, (u32) regaddr64, (u32) size64,
diff --git a/drivers/spi/spi-mxs.c b/drivers/spi/spi-mxs.c
index a3ede249d05d..e3d8b3197d22 100644
--- a/drivers/spi/spi-mxs.c
+++ b/drivers/spi/spi-mxs.c
@@ -241,6 +241,7 @@ static int mxs_spi_txrx_dma(struct mxs_spi *spi, int cs,
         INIT_COMPLETION(spi->c);
 
         ctrl0 = readl(ssp->base + HW_SSP_CTRL0);
+        ctrl0 &= ~BM_SSP_CTRL0_XFER_COUNT;
         ctrl0 |= BM_SSP_CTRL0_DATA_XFER | mxs_spi_cs_to_reg(cs);
 
         if (*first)
@@ -256,8 +257,10 @@ static int mxs_spi_txrx_dma(struct mxs_spi *spi, int cs,
                 if ((sg_count + 1 == sgs) && *last)
                         ctrl0 |= BM_SSP_CTRL0_IGNORE_CRC;
 
-                if (ssp->devid == IMX23_SSP)
+                if (ssp->devid == IMX23_SSP) {
+                        ctrl0 &= ~BM_SSP_CTRL0_XFER_COUNT;
                         ctrl0 |= min;
+                }
 
                 dma_xfer[sg_count].pio[0] = ctrl0;
                 dma_xfer[sg_count].pio[3] = min;
diff --git a/drivers/spi/spi-oc-tiny.c b/drivers/spi/spi-oc-tiny.c
index 432e66ec3088..cb2e284bd814 100644
--- a/drivers/spi/spi-oc-tiny.c
+++ b/drivers/spi/spi-oc-tiny.c
@@ -54,7 +54,7 @@ struct tiny_spi {
         unsigned int txc, rxc;
         const u8 *txp;
         u8 *rxp;
-        unsigned int gpio_cs_count;
+        int gpio_cs_count;
         int *gpio_cs;
 };
 
@@ -74,7 +74,7 @@ static void tiny_spi_chipselect(struct spi_device *spi, int is_active)
 {
         struct tiny_spi *hw = tiny_spi_to_hw(spi);
 
-        if (hw->gpio_cs_count) {
+        if (hw->gpio_cs_count > 0) {
                 gpio_set_value(hw->gpio_cs[spi->chip_select],
                         (spi->mode & SPI_CS_HIGH) ? is_active : !is_active);
         }
@@ -254,7 +254,7 @@ static int tiny_spi_of_probe(struct platform_device *pdev)
         if (!np)
                 return 0;
         hw->gpio_cs_count = of_gpio_count(np);
-        if (hw->gpio_cs_count) {
+        if (hw->gpio_cs_count > 0) {
                 hw->gpio_cs = devm_kzalloc(&pdev->dev,
                                 hw->gpio_cs_count * sizeof(unsigned int),
                                 GFP_KERNEL);
@@ -352,7 +352,7 @@ static int tiny_spi_probe(struct platform_device *pdev)
                         goto exit_gpio;
                 gpio_direction_output(hw->gpio_cs[i], 1);
         }
-        hw->bitbang.master->num_chipselect = max(1U, hw->gpio_cs_count);
+        hw->bitbang.master->num_chipselect = max(1, hw->gpio_cs_count);
 
         /* register our spi controller */
         err = spi_bitbang_start(&hw->bitbang);
diff --git a/drivers/spi/spi-omap-100k.c b/drivers/spi/spi-omap-100k.c
index 3aef7fa7d5b8..78d29a18dcc4 100644
--- a/drivers/spi/spi-omap-100k.c
+++ b/drivers/spi/spi-omap-100k.c
@@ -481,7 +481,7 @@ static int omap1_spi100k_transfer(struct spi_device *spi, struct spi_message *m)
         return 0;
 }
 
-static int __init omap1_spi100k_reset(struct omap1_spi100k *spi100k)
+static int omap1_spi100k_reset(struct omap1_spi100k *spi100k)
 {
         return 0;
 }
@@ -560,7 +560,7 @@ err1:
         return status;
 }
 
-static int __exit omap1_spi100k_remove(struct platform_device *pdev)
+static int omap1_spi100k_remove(struct platform_device *pdev)
 {
         struct spi_master       *master;
         struct omap1_spi100k    *spi100k;
@@ -604,7 +604,7 @@ static struct platform_driver omap1_spi100k_driver = {
                 .name           = "omap1_spi100k",
                 .owner          = THIS_MODULE,
         },
-        .remove         = __exit_p(omap1_spi100k_remove),
+        .remove         = omap1_spi100k_remove,
 };
 
 
diff --git a/drivers/spi/spi-omap-uwire.c b/drivers/spi/spi-omap-uwire.c
index 0a94d9dc9c31..102b233b50c4 100644
--- a/drivers/spi/spi-omap-uwire.c
+++ b/drivers/spi/spi-omap-uwire.c
@@ -476,7 +476,7 @@ static void uwire_off(struct uwire_spi *uwire)
         spi_master_put(uwire->bitbang.master);
 }
 
-static int __init uwire_probe(struct platform_device *pdev)
+static int uwire_probe(struct platform_device *pdev)
 {
         struct spi_master       *master;
         struct uwire_spi        *uwire;
@@ -536,7 +536,7 @@ static int __init uwire_probe(struct platform_device *pdev)
         return status;
 }
 
-static int __exit uwire_remove(struct platform_device *pdev)
+static int uwire_remove(struct platform_device *pdev)
 {
         struct uwire_spi        *uwire = dev_get_drvdata(&pdev->dev);
         int                     status;
@@ -557,7 +557,7 @@ static struct platform_driver uwire_driver = {
                 .name           = "omap_uwire",
                 .owner          = THIS_MODULE,
         },
-        .remove         = __exit_p(uwire_remove),
+        .remove         = uwire_remove,
         // suspend ... unuse ck
         // resume ... use ck
 };
diff --git a/drivers/spi/spi-omap2-mcspi.c b/drivers/spi/spi-omap2-mcspi.c
index b610f522ca44..69945b014c96 100644
--- a/drivers/spi/spi-omap2-mcspi.c
+++ b/drivers/spi/spi-omap2-mcspi.c
@@ -298,10 +298,10 @@ static void omap2_mcspi_rx_callback(void *data)
         struct omap2_mcspi *mcspi = spi_master_get_devdata(spi->master);
         struct omap2_mcspi_dma *mcspi_dma = &mcspi->dma_channels[spi->chip_select];
 
-        complete(&mcspi_dma->dma_rx_completion);
-
         /* We must disable the DMA RX request */
         omap2_mcspi_set_dma_req(spi, 1, 0);
+
+        complete(&mcspi_dma->dma_rx_completion);
 }
 
 static void omap2_mcspi_tx_callback(void *data)
@@ -310,10 +310,10 @@ static void omap2_mcspi_tx_callback(void *data)
         struct omap2_mcspi *mcspi = spi_master_get_devdata(spi->master);
         struct omap2_mcspi_dma *mcspi_dma = &mcspi->dma_channels[spi->chip_select];
 
-        complete(&mcspi_dma->dma_tx_completion);
-
         /* We must disable the DMA TX request */
         omap2_mcspi_set_dma_req(spi, 0, 0);
+
+        complete(&mcspi_dma->dma_tx_completion);
 }
 
 static void omap2_mcspi_tx_dma(struct spi_device *spi,
@@ -927,6 +927,7 @@ static void omap2_mcspi_work(struct omap2_mcspi *mcspi, struct spi_message *m)
 
         struct spi_device               *spi;
         struct spi_transfer             *t = NULL;
+        struct spi_master               *master;
         int                             cs_active = 0;
         struct omap2_mcspi_cs           *cs;
         struct omap2_mcspi_device_config *cd;
@@ -935,6 +936,7 @@ static void omap2_mcspi_work(struct omap2_mcspi *mcspi, struct spi_message *m)
         u32                             chconf;
 
         spi = m->spi;
+        master = spi->master;
         cs = spi->controller_state;
         cd = spi->controller_data;
 
@@ -952,6 +954,14 @@ static void omap2_mcspi_work(struct omap2_mcspi *mcspi, struct spi_message *m)
                         if (!t->speed_hz && !t->bits_per_word)
                                 par_override = 0;
                 }
+                if (cd && cd->cs_per_word) {
+                        chconf = mcspi->ctx.modulctrl;
+                        chconf &= ~OMAP2_MCSPI_MODULCTRL_SINGLE;
+                        mcspi_write_reg(master, OMAP2_MCSPI_MODULCTRL, chconf);
+                        mcspi->ctx.modulctrl =
+                                mcspi_read_cs_reg(spi, OMAP2_MCSPI_MODULCTRL);
+                }
+
 
                 if (!cs_active) {
                         omap2_mcspi_force_cs(spi, 1);
@@ -1013,6 +1023,14 @@ static void omap2_mcspi_work(struct omap2_mcspi *mcspi, struct spi_message *m)
         if (cs_active)
                 omap2_mcspi_force_cs(spi, 0);
 
+        if (cd && cd->cs_per_word) {
+                chconf = mcspi->ctx.modulctrl;
+                chconf |= OMAP2_MCSPI_MODULCTRL_SINGLE;
+                mcspi_write_reg(master, OMAP2_MCSPI_MODULCTRL, chconf);
+                mcspi->ctx.modulctrl =
+                        mcspi_read_cs_reg(spi, OMAP2_MCSPI_MODULCTRL);
+        }
+
         omap2_mcspi_set_enable(spi, 0);
 
         m->status = status;
@@ -1020,7 +1038,7 @@ static void omap2_mcspi_work(struct omap2_mcspi *mcspi, struct spi_message *m)
 }
 
 static int omap2_mcspi_transfer_one_message(struct spi_master *master,
-                                                struct spi_message *m)
+                struct spi_message *m)
 {
         struct omap2_mcspi      *mcspi;
         struct spi_transfer     *t;
@@ -1041,7 +1059,7 @@ static int omap2_mcspi_transfer_one_message(struct spi_master *master,
                                 || (len && !(rx_buf || tx_buf))
                                 || (t->bits_per_word &&
                                         (  t->bits_per_word < 4
-                                        || t->bits_per_word > 32))) {
+                                           || t->bits_per_word > 32))) {
                         dev_dbg(mcspi->dev, "transfer: %d Hz, %d %s%s, %d bpw\n",
                                         t->speed_hz,
                                         len,
@@ -1052,8 +1070,8 @@ static int omap2_mcspi_transfer_one_message(struct spi_master *master,
                 }
                 if (t->speed_hz && t->speed_hz < (OMAP2_MCSPI_MAX_FREQ >> 15)) {
                         dev_dbg(mcspi->dev, "speed_hz %d below minimum %d Hz\n",
-                                t->speed_hz,
-                                OMAP2_MCSPI_MAX_FREQ >> 15);
+                                        t->speed_hz,
+                                        OMAP2_MCSPI_MAX_FREQ >> 15);
                         return -EINVAL;
                 }
 
@@ -1099,7 +1117,7 @@ static int omap2_mcspi_master_setup(struct omap2_mcspi *mcspi)
                 return ret;
 
         mcspi_write_reg(master, OMAP2_MCSPI_WAKEUPENABLE,
-                                OMAP2_MCSPI_WAKEUPENABLE_WKEN);
+                        OMAP2_MCSPI_WAKEUPENABLE_WKEN);
         ctx->wakeupenable = OMAP2_MCSPI_WAKEUPENABLE_WKEN;
 
         omap2_mcspi_set_master_mode(master);
@@ -1228,7 +1246,7 @@ static int omap2_mcspi_probe(struct platform_device *pdev)
 
                 sprintf(dma_ch_name, "rx%d", i);
                 dma_res = platform_get_resource_byname(pdev, IORESOURCE_DMA,
-                                                        dma_ch_name);
+                                dma_ch_name);
                 if (!dma_res) {
                         dev_dbg(&pdev->dev, "cannot get DMA RX channel\n");
                         status = -ENODEV;
@@ -1238,7 +1256,7 @@ static int omap2_mcspi_probe(struct platform_device *pdev)
                 mcspi->dma_channels[i].dma_rx_sync_dev = dma_res->start;
                 sprintf(dma_ch_name, "tx%d", i);
                 dma_res = platform_get_resource_byname(pdev, IORESOURCE_DMA,
-                                                        dma_ch_name);
+                                dma_ch_name);
                 if (!dma_res) {
                         dev_dbg(&pdev->dev, "cannot get DMA TX channel\n");
                         status = -ENODEV;
@@ -1254,7 +1272,7 @@ static int omap2_mcspi_probe(struct platform_device *pdev)
         pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
         if (IS_ERR(pinctrl))
                 dev_warn(&pdev->dev,
-                        "pins are not configured from the driver\n");
+                                "pins are not configured from the driver\n");
 
         pm_runtime_use_autosuspend(&pdev->dev);
         pm_runtime_set_autosuspend_delay(&pdev->dev, SPI_AUTOSUSPEND_TIMEOUT);
diff --git a/drivers/spi/spi-orion.c b/drivers/spi/spi-orion.c
index b7e718254b1d..66a5f82cf138 100644
--- a/drivers/spi/spi-orion.c
+++ b/drivers/spi/spi-orion.c
@@ -366,7 +366,7 @@ msg_done:
         return 0;
 }
 
-static int __init orion_spi_reset(struct orion_spi *orion_spi)
+static int orion_spi_reset(struct orion_spi *orion_spi)
 {
         /* Verify that the CS is deasserted */
         orion_spi_set_cs(orion_spi, 0);
@@ -396,7 +396,7 @@ static int orion_spi_setup(struct spi_device *spi)
         return 0;
 }
 
-static int __init orion_spi_probe(struct platform_device *pdev)
+static int orion_spi_probe(struct platform_device *pdev)
 {
         struct spi_master *master;
         struct orion_spi *spi;
@@ -479,7 +479,7 @@ out:
 }
 
 
-static int __exit orion_spi_remove(struct platform_device *pdev)
+static int orion_spi_remove(struct platform_device *pdev)
 {
         struct spi_master *master;
         struct resource *r;
@@ -513,20 +513,11 @@ static struct platform_driver orion_spi_driver = {
                 .owner  = THIS_MODULE,
                 .of_match_table = of_match_ptr(orion_spi_of_match_table),
         },
-        .remove         = __exit_p(orion_spi_remove),
+        .probe          = orion_spi_probe,
+        .remove         = orion_spi_remove,
 };
 
-static int __init orion_spi_init(void)
-{
-        return platform_driver_probe(&orion_spi_driver, orion_spi_probe);
-}
-module_init(orion_spi_init);
-
-static void __exit orion_spi_exit(void)
-{
-        platform_driver_unregister(&orion_spi_driver);
-}
-module_exit(orion_spi_exit);
+module_platform_driver(orion_spi_driver);
 
 MODULE_DESCRIPTION("Orion SPI driver");
 MODULE_AUTHOR("Shadi Ammouri <shadi@marvell.com>");
diff --git a/drivers/spi/spi-ppc4xx.c b/drivers/spi/spi-ppc4xx.c
index 7a85f22b6474..357f183a4fb7 100644
--- a/drivers/spi/spi-ppc4xx.c
+++ b/drivers/spi/spi-ppc4xx.c
@@ -389,7 +389,7 @@ static void free_gpios(struct ppc4xx_spi *hw)
 /*
  * platform_device layer stuff...
  */
-static int __init spi_ppc4xx_of_probe(struct platform_device *op)
+static int spi_ppc4xx_of_probe(struct platform_device *op)
 {
         struct ppc4xx_spi *hw;
         struct spi_master *master;
@@ -419,7 +419,7 @@ static int __init spi_ppc4xx_of_probe(struct platform_device *op)
          * This includes both "null" gpio's and real ones.
          */
         num_gpios = of_gpio_count(np);
-        if (num_gpios) {
+        if (num_gpios > 0) {
                 int i;
 
                 hw->gpios = kzalloc(sizeof(int) * num_gpios, GFP_KERNEL);
@@ -471,7 +471,7 @@ static int __init spi_ppc4xx_of_probe(struct platform_device *op)
                 SPI_CPHA | SPI_CPOL | SPI_CS_HIGH | SPI_LSB_FIRST;
 
         /* this many pins in all GPIO controllers */
-        bbp->master->num_chipselect = num_gpios;
+        bbp->master->num_chipselect = num_gpios > 0 ? num_gpios : 0;
 
         /* Get the clock for the OPB */
         opbnp = of_find_compatible_node(NULL, NULL, "ibm,opb");
@@ -560,7 +560,7 @@ free_master:
         return ret;
 }
 
-static int __exit spi_ppc4xx_of_remove(struct platform_device *op)
+static int spi_ppc4xx_of_remove(struct platform_device *op)
 {
         struct spi_master *master = dev_get_drvdata(&op->dev);
         struct ppc4xx_spi *hw = spi_master_get_devdata(master);
@@ -583,7 +583,7 @@ MODULE_DEVICE_TABLE(of, spi_ppc4xx_of_match);
 
 static struct platform_driver spi_ppc4xx_of_driver = {
         .probe = spi_ppc4xx_of_probe,
-        .remove = __exit_p(spi_ppc4xx_of_remove),
+        .remove = spi_ppc4xx_of_remove,
         .driver = {
                 .name = DRIVER_NAME,
                 .owner = THIS_MODULE,
diff --git a/drivers/spi/spi-pxa2xx-dma.c b/drivers/spi/spi-pxa2xx-dma.c
new file mode 100644
index 000000000000..c735c5a008a2
--- /dev/null
+++ b/drivers/spi/spi-pxa2xx-dma.c
@@ -0,0 +1,392 @@
+/*
+ * PXA2xx SPI DMA engine support.
+ *
+ * Copyright (C) 2013, Intel Corporation
+ * Author: Mika Westerberg <mika.westerberg@linux.intel.com>
+ *
+ * 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.
+ */
+
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+#include <linux/dmaengine.h>
+#include <linux/pxa2xx_ssp.h>
+#include <linux/scatterlist.h>
+#include <linux/sizes.h>
+#include <linux/spi/spi.h>
+#include <linux/spi/pxa2xx_spi.h>
+
+#include "spi-pxa2xx.h"
+
+static int pxa2xx_spi_map_dma_buffer(struct driver_data *drv_data,
+                                     enum dma_data_direction dir)
+{
+        int i, nents, len = drv_data->len;
+        struct scatterlist *sg;
+        struct device *dmadev;
+        struct sg_table *sgt;
+        void *buf, *pbuf;
+
+        /*
+         * Some DMA controllers have problems transferring buffers that are
+         * not multiple of 4 bytes. So we truncate the transfer so that it
+         * is suitable for such controllers, and handle the trailing bytes
+         * manually after the DMA completes.
+         *
+         * REVISIT: It would be better if this information could be
+         * retrieved directly from the DMA device in a similar way than
+         * ->copy_align etc. is done.
+         */
+        len = ALIGN(drv_data->len, 4);
+
+        if (dir == DMA_TO_DEVICE) {
+                dmadev = drv_data->tx_chan->device->dev;
+                sgt = &drv_data->tx_sgt;
+                buf = drv_data->tx;
+                drv_data->tx_map_len = len;
+        } else {
+                dmadev = drv_data->rx_chan->device->dev;
+                sgt = &drv_data->rx_sgt;
+                buf = drv_data->rx;
+                drv_data->rx_map_len = len;
+        }
+
+        nents = DIV_ROUND_UP(len, SZ_2K);
+        if (nents != sgt->nents) {
+                int ret;
+
+                sg_free_table(sgt);
+                ret = sg_alloc_table(sgt, nents, GFP_KERNEL);
+                if (ret)
+                        return ret;
+        }
+
+        pbuf = buf;
+        for_each_sg(sgt->sgl, sg, sgt->nents, i) {
+                size_t bytes = min_t(size_t, len, SZ_2K);
+
+                if (buf)
+                        sg_set_buf(sg, pbuf, bytes);
+                else
+                        sg_set_buf(sg, drv_data->dummy, bytes);
+
+                pbuf += bytes;
+                len -= bytes;
+        }
+
+        nents = dma_map_sg(dmadev, sgt->sgl, sgt->nents, dir);
+        if (!nents)
+                return -ENOMEM;
+
+        return nents;
+}
+
+static void pxa2xx_spi_unmap_dma_buffer(struct driver_data *drv_data,
+                                        enum dma_data_direction dir)
+{
+        struct device *dmadev;
+        struct sg_table *sgt;
+
+        if (dir == DMA_TO_DEVICE) {
+                dmadev = drv_data->tx_chan->device->dev;
+                sgt = &drv_data->tx_sgt;
+        } else {
+                dmadev = drv_data->rx_chan->device->dev;
+                sgt = &drv_data->rx_sgt;
+        }
+
+        dma_unmap_sg(dmadev, sgt->sgl, sgt->nents, dir);
+}
+
+static void pxa2xx_spi_unmap_dma_buffers(struct driver_data *drv_data)
+{
+        if (!drv_data->dma_mapped)
+                return;
+
+        pxa2xx_spi_unmap_dma_buffer(drv_data, DMA_FROM_DEVICE);
+        pxa2xx_spi_unmap_dma_buffer(drv_data, DMA_TO_DEVICE);
+
+        drv_data->dma_mapped = 0;
+}
+
+static void pxa2xx_spi_dma_transfer_complete(struct driver_data *drv_data,
+                                             bool error)
+{
+        struct spi_message *msg = drv_data->cur_msg;
+
+        /*
+         * It is possible that one CPU is handling ROR interrupt and other
+         * just gets DMA completion. Calling pump_transfers() twice for the
+         * same transfer leads to problems thus we prevent concurrent calls
+         * by using ->dma_running.
+         */
+        if (atomic_dec_and_test(&drv_data->dma_running)) {
+                void __iomem *reg = drv_data->ioaddr;
+
+                /*
+                 * If the other CPU is still handling the ROR interrupt we
+                 * might not know about the error yet. So we re-check the
+                 * ROR bit here before we clear the status register.
+                 */
+                if (!error) {
+                        u32 status = read_SSSR(reg) & drv_data->mask_sr;
+                        error = status & SSSR_ROR;
+                }
+
+                /* Clear status & disable interrupts */
+                write_SSCR1(read_SSCR1(reg) & ~drv_data->dma_cr1, reg);
+                write_SSSR_CS(drv_data, drv_data->clear_sr);
+                if (!pxa25x_ssp_comp(drv_data))
+                        write_SSTO(0, reg);
+
+                if (!error) {
+                        pxa2xx_spi_unmap_dma_buffers(drv_data);
+
+                        /* Handle the last bytes of unaligned transfer */
+                        drv_data->tx += drv_data->tx_map_len;
+                        drv_data->write(drv_data);
+
+                        drv_data->rx += drv_data->rx_map_len;
+                        drv_data->read(drv_data);
+
+                        msg->actual_length += drv_data->len;
+                        msg->state = pxa2xx_spi_next_transfer(drv_data);
+                } else {
+                        /* In case we got an error we disable the SSP now */
+                        write_SSCR0(read_SSCR0(reg) & ~SSCR0_SSE, reg);
+
+                        msg->state = ERROR_STATE;
+                }
+
+                tasklet_schedule(&drv_data->pump_transfers);
+        }
+}
+
+static void pxa2xx_spi_dma_callback(void *data)
+{
+        pxa2xx_spi_dma_transfer_complete(data, false);
+}
+
+static struct dma_async_tx_descriptor *
+pxa2xx_spi_dma_prepare_one(struct driver_data *drv_data,
+                           enum dma_transfer_direction dir)
+{
+        struct pxa2xx_spi_master *pdata = drv_data->master_info;
+        struct chip_data *chip = drv_data->cur_chip;
+        enum dma_slave_buswidth width;
+        struct dma_slave_config cfg;
+        struct dma_chan *chan;
+        struct sg_table *sgt;
+        int nents, ret;
+
+        switch (drv_data->n_bytes) {
+        case 1:
+                width = DMA_SLAVE_BUSWIDTH_1_BYTE;
+                break;
+        case 2:
+                width = DMA_SLAVE_BUSWIDTH_2_BYTES;
+                break;
+        default:
+                width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+                break;
+        }
+
+        memset(&cfg, 0, sizeof(cfg));
+        cfg.direction = dir;
+
+        if (dir == DMA_MEM_TO_DEV) {
+                cfg.dst_addr = drv_data->ssdr_physical;
+                cfg.dst_addr_width = width;
+                cfg.dst_maxburst = chip->dma_burst_size;
+                cfg.slave_id = pdata->tx_slave_id;
+
+                sgt = &drv_data->tx_sgt;
+                nents = drv_data->tx_nents;
+                chan = drv_data->tx_chan;
+        } else {
+                cfg.src_addr = drv_data->ssdr_physical;
+                cfg.src_addr_width = width;
+                cfg.src_maxburst = chip->dma_burst_size;
+                cfg.slave_id = pdata->rx_slave_id;
+
+                sgt = &drv_data->rx_sgt;
+                nents = drv_data->rx_nents;
+                chan = drv_data->rx_chan;
+        }
+
+        ret = dmaengine_slave_config(chan, &cfg);
+        if (ret) {
+                dev_warn(&drv_data->pdev->dev, "DMA slave config failed\n");
+                return NULL;
+        }
+
+        return dmaengine_prep_slave_sg(chan, sgt->sgl, nents, dir,
+                                       DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
+}
+
+static bool pxa2xx_spi_dma_filter(struct dma_chan *chan, void *param)
+{
+        const struct pxa2xx_spi_master *pdata = param;
+
+        return chan->chan_id == pdata->tx_chan_id ||
+               chan->chan_id == pdata->rx_chan_id;
+}
+
+bool pxa2xx_spi_dma_is_possible(size_t len)
+{
+        return len <= MAX_DMA_LEN;
+}
+
+int pxa2xx_spi_map_dma_buffers(struct driver_data *drv_data)
+{
+        const struct chip_data *chip = drv_data->cur_chip;
+        int ret;
+
+        if (!chip->enable_dma)
+                return 0;
+
+        /* Don't bother with DMA if we can't do even a single burst */
+        if (drv_data->len < chip->dma_burst_size)
+                return 0;
+
+        ret = pxa2xx_spi_map_dma_buffer(drv_data, DMA_TO_DEVICE);
+        if (ret <= 0) {
+                dev_warn(&drv_data->pdev->dev, "failed to DMA map TX\n");
+                return 0;
+        }
+
+        drv_data->tx_nents = ret;
+
+        ret = pxa2xx_spi_map_dma_buffer(drv_data, DMA_FROM_DEVICE);
+        if (ret <= 0) {
+                pxa2xx_spi_unmap_dma_buffer(drv_data, DMA_TO_DEVICE);
+                dev_warn(&drv_data->pdev->dev, "failed to DMA map RX\n");
+                return 0;
+        }
+
+        drv_data->rx_nents = ret;
+        return 1;
+}
+
+irqreturn_t pxa2xx_spi_dma_transfer(struct driver_data *drv_data)
+{
+        u32 status;
+
+        status = read_SSSR(drv_data->ioaddr) & drv_data->mask_sr;
+        if (status & SSSR_ROR) {
+                dev_err(&drv_data->pdev->dev, "FIFO overrun\n");
+
+                dmaengine_terminate_all(drv_data->rx_chan);
+                dmaengine_terminate_all(drv_data->tx_chan);
+
+                pxa2xx_spi_dma_transfer_complete(drv_data, true);
+                return IRQ_HANDLED;
+        }
+
+        return IRQ_NONE;
+}
+
+int pxa2xx_spi_dma_prepare(struct driver_data *drv_data, u32 dma_burst)
+{
+        struct dma_async_tx_descriptor *tx_desc, *rx_desc;
+
+        tx_desc = pxa2xx_spi_dma_prepare_one(drv_data, DMA_MEM_TO_DEV);
+        if (!tx_desc) {
+                dev_err(&drv_data->pdev->dev,
+                        "failed to get DMA TX descriptor\n");
+                return -EBUSY;
+        }
+
+        rx_desc = pxa2xx_spi_dma_prepare_one(drv_data, DMA_DEV_TO_MEM);
+        if (!rx_desc) {
+                dev_err(&drv_data->pdev->dev,
+                        "failed to get DMA RX descriptor\n");
+                return -EBUSY;
+        }
+
+        /* We are ready when RX completes */
+        rx_desc->callback = pxa2xx_spi_dma_callback;
+        rx_desc->callback_param = drv_data;
+
+        dmaengine_submit(rx_desc);
+        dmaengine_submit(tx_desc);
+        return 0;
+}
+
+void pxa2xx_spi_dma_start(struct driver_data *drv_data)
+{
+        dma_async_issue_pending(drv_data->rx_chan);
+        dma_async_issue_pending(drv_data->tx_chan);
+
+        atomic_set(&drv_data->dma_running, 1);
+}
+
+int pxa2xx_spi_dma_setup(struct driver_data *drv_data)
+{
+        struct pxa2xx_spi_master *pdata = drv_data->master_info;
+        dma_cap_mask_t mask;
+
+        dma_cap_zero(mask);
+        dma_cap_set(DMA_SLAVE, mask);
+
+        drv_data->dummy = devm_kzalloc(&drv_data->pdev->dev, SZ_2K, GFP_KERNEL);
+        if (!drv_data->dummy)
+                return -ENOMEM;
+
+        drv_data->tx_chan = dma_request_channel(mask, pxa2xx_spi_dma_filter,
+                                                pdata);
+        if (!drv_data->tx_chan)
+                return -ENODEV;
+
+        drv_data->rx_chan = dma_request_channel(mask, pxa2xx_spi_dma_filter,
+                                                pdata);
+        if (!drv_data->rx_chan) {
+                dma_release_channel(drv_data->tx_chan);
+                drv_data->tx_chan = NULL;
+                return -ENODEV;
+        }
+
+        return 0;
+}
+
+void pxa2xx_spi_dma_release(struct driver_data *drv_data)
+{
+        if (drv_data->rx_chan) {
+                dmaengine_terminate_all(drv_data->rx_chan);
+                dma_release_channel(drv_data->rx_chan);
+                sg_free_table(&drv_data->rx_sgt);
+                drv_data->rx_chan = NULL;
+        }
+        if (drv_data->tx_chan) {
+                dmaengine_terminate_all(drv_data->tx_chan);
+                dma_release_channel(drv_data->tx_chan);
+                sg_free_table(&drv_data->tx_sgt);
+                drv_data->tx_chan = NULL;
+        }
+}
+
+void pxa2xx_spi_dma_resume(struct driver_data *drv_data)
+{
+}
+
+int pxa2xx_spi_set_dma_burst_and_threshold(struct chip_data *chip,
+                                           struct spi_device *spi,
+                                           u8 bits_per_word, u32 *burst_code,
+                                           u32 *threshold)
+{
+        struct pxa2xx_spi_chip *chip_info = spi->controller_data;
+
+        /*
+         * If the DMA burst size is given in chip_info we use that,
+         * otherwise we use the default. Also we use the default FIFO
+         * thresholds for now.
+         */
+        *burst_code = chip_info ? chip_info->dma_burst_size : 16;
+        *threshold = SSCR1_RxTresh(RX_THRESH_DFLT)
+                   | SSCR1_TxTresh(TX_THRESH_DFLT);
+
+        return 0;
+}
diff --git a/drivers/spi/spi-pxa2xx-pci.c b/drivers/spi/spi-pxa2xx-pci.c
index cf95587eefde..364964d2ed04 100644
--- a/drivers/spi/spi-pxa2xx-pci.c
+++ b/drivers/spi/spi-pxa2xx-pci.c
@@ -8,147 +8,58 @@
 #include <linux/module.h>
 #include <linux/spi/pxa2xx_spi.h>
 
-struct ce4100_info {
-        struct ssp_device ssp;
-        struct platform_device *spi_pdev;
-};
-
-static DEFINE_MUTEX(ssp_lock);
-static LIST_HEAD(ssp_list);
-
-struct ssp_device *pxa_ssp_request(int port, const char *label)
-{
-        struct ssp_device *ssp = NULL;
-
-        mutex_lock(&ssp_lock);
-
-        list_for_each_entry(ssp, &ssp_list, node) {
-                if (ssp->port_id == port && ssp->use_count == 0) {
-                        ssp->use_count++;
-                        ssp->label = label;
-                        break;
-                }
-        }
-
-        mutex_unlock(&ssp_lock);
-
-        if (&ssp->node == &ssp_list)
-                return NULL;
-
-        return ssp;
-}
-EXPORT_SYMBOL_GPL(pxa_ssp_request);
-
-void pxa_ssp_free(struct ssp_device *ssp)
-{
-        mutex_lock(&ssp_lock);
-        if (ssp->use_count) {
-                ssp->use_count--;
-                ssp->label = NULL;
-        } else
-                dev_err(&ssp->pdev->dev, "device already free\n");
-        mutex_unlock(&ssp_lock);
-}
-EXPORT_SYMBOL_GPL(pxa_ssp_free);
-
 static int ce4100_spi_probe(struct pci_dev *dev,
                 const struct pci_device_id *ent)
 {
+        struct platform_device_info pi;
         int ret;
-        resource_size_t phys_beg;
-        resource_size_t phys_len;
-        struct ce4100_info *spi_info;
         struct platform_device *pdev;
         struct pxa2xx_spi_master spi_pdata;
         struct ssp_device *ssp;
 
-        ret = pci_enable_device(dev);
+        ret = pcim_enable_device(dev);
         if (ret)
                 return ret;
 
-        phys_beg = pci_resource_start(dev, 0);
-        phys_len = pci_resource_len(dev, 0);
-
-        if (!request_mem_region(phys_beg, phys_len,
-                                "CE4100 SPI")) {
-                dev_err(&dev->dev, "Can't request register space.\n");
-                ret = -EBUSY;
+        ret = pcim_iomap_regions(dev, 1 << 0, "PXA2xx SPI");
+        if (!ret)
                 return ret;
-        }
 
-        pdev = platform_device_alloc("pxa2xx-spi", dev->devfn);
-        spi_info = kzalloc(sizeof(*spi_info), GFP_KERNEL);
-        if (!pdev || !spi_info ) {
-                ret = -ENOMEM;
-                goto err_nomem;
-        }
         memset(&spi_pdata, 0, sizeof(spi_pdata));
         spi_pdata.num_chipselect = dev->devfn;
 
-        ret = platform_device_add_data(pdev, &spi_pdata, sizeof(spi_pdata));
-        if (ret)
-                goto err_nomem;
-
-        pdev->dev.parent = &dev->dev;
-        pdev->dev.of_node = dev->dev.of_node;
-        ssp = &spi_info->ssp;
+        ssp = &spi_pdata.ssp;
         ssp->phys_base = pci_resource_start(dev, 0);
-        ssp->mmio_base = ioremap(phys_beg, phys_len);
+        ssp->mmio_base = pcim_iomap_table(dev)[0];
         if (!ssp->mmio_base) {
-                dev_err(&pdev->dev, "failed to ioremap() registers\n");
-                ret = -EIO;
-                goto err_nomem;
+                dev_err(&dev->dev, "failed to ioremap() registers\n");
+                return -EIO;
         }
         ssp->irq = dev->irq;
-        ssp->port_id = pdev->id;
+        ssp->port_id = dev->devfn;
         ssp->type = PXA25x_SSP;
 
-        mutex_lock(&ssp_lock);
-        list_add(&ssp->node, &ssp_list);
-        mutex_unlock(&ssp_lock);
+        memset(&pi, 0, sizeof(pi));
+        pi.parent = &dev->dev;
+        pi.name = "pxa2xx-spi";
+        pi.id = ssp->port_id;
+        pi.data = &spi_pdata;
+        pi.size_data = sizeof(spi_pdata);
 
-        pci_set_drvdata(dev, spi_info);
+        pdev = platform_device_register_full(&pi);
+        if (!pdev)
+                return -ENOMEM;
 
-        ret = platform_device_add(pdev);
-        if (ret)
-                goto err_dev_add;
+        pci_set_drvdata(dev, pdev);
 
-        return ret;
-
-err_dev_add:
-        pci_set_drvdata(dev, NULL);
-        mutex_lock(&ssp_lock);
-        list_del(&ssp->node);
-        mutex_unlock(&ssp_lock);
-        iounmap(ssp->mmio_base);
-
-err_nomem:
-        release_mem_region(phys_beg, phys_len);
-        platform_device_put(pdev);
-        kfree(spi_info);
-        return ret;
+        return 0;
 }
 
 static void ce4100_spi_remove(struct pci_dev *dev)
 {
-        struct ce4100_info *spi_info;
-        struct ssp_device *ssp;
-
-        spi_info = pci_get_drvdata(dev);
-        ssp = &spi_info->ssp;
-        platform_device_unregister(spi_info->spi_pdev);
-
-        iounmap(ssp->mmio_base);
-        release_mem_region(pci_resource_start(dev, 0),
-                        pci_resource_len(dev, 0));
-
-        mutex_lock(&ssp_lock);
-        list_del(&ssp->node);
-        mutex_unlock(&ssp_lock);
+        struct platform_device *pdev = pci_get_drvdata(dev);
 
-        pci_set_drvdata(dev, NULL);
-        pci_disable_device(dev);
-        kfree(spi_info);
+        platform_device_unregister(pdev);
 }
 
 static DEFINE_PCI_DEVICE_TABLE(ce4100_spi_devices) = {
diff --git a/drivers/spi/spi-pxa2xx-pxadma.c b/drivers/spi/spi-pxa2xx-pxadma.c
new file mode 100644
index 000000000000..2916efc7cfe5
--- /dev/null
+++ b/drivers/spi/spi-pxa2xx-pxadma.c
@@ -0,0 +1,490 @@
+/*
+ * PXA2xx SPI private DMA support.
+ *
+ * Copyright (C) 2005 Stephen Street / StreetFire Sound Labs
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+#include <linux/pxa2xx_ssp.h>
+#include <linux/spi/spi.h>
+#include <linux/spi/pxa2xx_spi.h>
+
+#include "spi-pxa2xx.h"
+
+#define DMA_INT_MASK            (DCSR_ENDINTR | DCSR_STARTINTR | DCSR_BUSERR)
+#define RESET_DMA_CHANNEL       (DCSR_NODESC | DMA_INT_MASK)
+
+bool pxa2xx_spi_dma_is_possible(size_t len)
+{
+        /* Try to map dma buffer and do a dma transfer if successful, but
+         * only if the length is non-zero and less than MAX_DMA_LEN.
+         *
+         * Zero-length non-descriptor DMA is illegal on PXA2xx; force use
+         * of PIO instead.  Care is needed above because the transfer may
+         * have have been passed with buffers that are already dma mapped.
+         * A zero-length transfer in PIO mode will not try to write/read
+         * to/from the buffers
+         *
+         * REVISIT large transfers are exactly where we most want to be
+         * using DMA.  If this happens much, split those transfers into
+         * multiple DMA segments rather than forcing PIO.
+         */
+        return len > 0 && len <= MAX_DMA_LEN;
+}
+
+int pxa2xx_spi_map_dma_buffers(struct driver_data *drv_data)
+{
+        struct spi_message *msg = drv_data->cur_msg;
+        struct device *dev = &msg->spi->dev;
+
+        if (!drv_data->cur_chip->enable_dma)
+                return 0;
+
+        if (msg->is_dma_mapped)
+                return  drv_data->rx_dma && drv_data->tx_dma;
+
+        if (!IS_DMA_ALIGNED(drv_data->rx) || !IS_DMA_ALIGNED(drv_data->tx))
+                return 0;
+
+        /* Modify setup if rx buffer is null */
+        if (drv_data->rx == NULL) {
+                *drv_data->null_dma_buf = 0;
+                drv_data->rx = drv_data->null_dma_buf;
+                drv_data->rx_map_len = 4;
+        } else
+                drv_data->rx_map_len = drv_data->len;
+
+
+        /* Modify setup if tx buffer is null */
+        if (drv_data->tx == NULL) {
+                *drv_data->null_dma_buf = 0;
+                drv_data->tx = drv_data->null_dma_buf;
+                drv_data->tx_map_len = 4;
+        } else
+                drv_data->tx_map_len = drv_data->len;
+
+        /* Stream map the tx buffer. Always do DMA_TO_DEVICE first
+         * so we flush the cache *before* invalidating it, in case
+         * the tx and rx buffers overlap.
+         */
+        drv_data->tx_dma = dma_map_single(dev, drv_data->tx,
+                                        drv_data->tx_map_len, DMA_TO_DEVICE);
+        if (dma_mapping_error(dev, drv_data->tx_dma))
+                return 0;
+
+        /* Stream map the rx buffer */
+        drv_data->rx_dma = dma_map_single(dev, drv_data->rx,
+                                        drv_data->rx_map_len, DMA_FROM_DEVICE);
+        if (dma_mapping_error(dev, drv_data->rx_dma)) {
+                dma_unmap_single(dev, drv_data->tx_dma,
+                                        drv_data->tx_map_len, DMA_TO_DEVICE);
+                return 0;
+        }
+
+        return 1;
+}
+
+static void pxa2xx_spi_unmap_dma_buffers(struct driver_data *drv_data)
+{
+        struct device *dev;
+
+        if (!drv_data->dma_mapped)
+                return;
+
+        if (!drv_data->cur_msg->is_dma_mapped) {
+                dev = &drv_data->cur_msg->spi->dev;
+                dma_unmap_single(dev, drv_data->rx_dma,
+                                        drv_data->rx_map_len, DMA_FROM_DEVICE);
+                dma_unmap_single(dev, drv_data->tx_dma,
+                                        drv_data->tx_map_len, DMA_TO_DEVICE);
+        }
+
+        drv_data->dma_mapped = 0;
+}
+
+static int wait_ssp_rx_stall(void const __iomem *ioaddr)
+{
+        unsigned long limit = loops_per_jiffy << 1;
+
+        while ((read_SSSR(ioaddr) & SSSR_BSY) && --limit)
+                cpu_relax();
+
+        return limit;
+}
+
+static int wait_dma_channel_stop(int channel)
+{
+        unsigned long limit = loops_per_jiffy << 1;
+
+        while (!(DCSR(channel) & DCSR_STOPSTATE) && --limit)
+                cpu_relax();
+
+        return limit;
+}
+
+static void pxa2xx_spi_dma_error_stop(struct driver_data *drv_data,
+                                      const char *msg)
+{
+        void __iomem *reg = drv_data->ioaddr;
+
+        /* Stop and reset */
+        DCSR(drv_data->rx_channel) = RESET_DMA_CHANNEL;
+        DCSR(drv_data->tx_channel) = RESET_DMA_CHANNEL;
+        write_SSSR_CS(drv_data, drv_data->clear_sr);
+        write_SSCR1(read_SSCR1(reg) & ~drv_data->dma_cr1, reg);
+        if (!pxa25x_ssp_comp(drv_data))
+                write_SSTO(0, reg);
+        pxa2xx_spi_flush(drv_data);
+        write_SSCR0(read_SSCR0(reg) & ~SSCR0_SSE, reg);
+
+        pxa2xx_spi_unmap_dma_buffers(drv_data);
+
+        dev_err(&drv_data->pdev->dev, "%s\n", msg);
+
+        drv_data->cur_msg->state = ERROR_STATE;
+        tasklet_schedule(&drv_data->pump_transfers);
+}
+
+static void pxa2xx_spi_dma_transfer_complete(struct driver_data *drv_data)
+{
+        void __iomem *reg = drv_data->ioaddr;
+        struct spi_message *msg = drv_data->cur_msg;
+
+        /* Clear and disable interrupts on SSP and DMA channels*/
+        write_SSCR1(read_SSCR1(reg) & ~drv_data->dma_cr1, reg);
+        write_SSSR_CS(drv_data, drv_data->clear_sr);
+        DCSR(drv_data->tx_channel) = RESET_DMA_CHANNEL;
+        DCSR(drv_data->rx_channel) = RESET_DMA_CHANNEL;
+
+        if (wait_dma_channel_stop(drv_data->rx_channel) == 0)
+                dev_err(&drv_data->pdev->dev,
+                        "dma_handler: dma rx channel stop failed\n");
+
+        if (wait_ssp_rx_stall(drv_data->ioaddr) == 0)
+                dev_err(&drv_data->pdev->dev,
+                        "dma_transfer: ssp rx stall failed\n");
+
+        pxa2xx_spi_unmap_dma_buffers(drv_data);
+
+        /* update the buffer pointer for the amount completed in dma */
+        drv_data->rx += drv_data->len -
+                        (DCMD(drv_data->rx_channel) & DCMD_LENGTH);
+
+        /* read trailing data from fifo, it does not matter how many
+         * bytes are in the fifo just read until buffer is full
+         * or fifo is empty, which ever occurs first */
+        drv_data->read(drv_data);
+
+        /* return count of what was actually read */
+        msg->actual_length += drv_data->len -
+                                (drv_data->rx_end - drv_data->rx);
+
+        /* Transfer delays and chip select release are
+         * handled in pump_transfers or giveback
+         */
+
+        /* Move to next transfer */
+        msg->state = pxa2xx_spi_next_transfer(drv_data);
+
+        /* Schedule transfer tasklet */
+        tasklet_schedule(&drv_data->pump_transfers);
+}
+
+void pxa2xx_spi_dma_handler(int channel, void *data)
+{
+        struct driver_data *drv_data = data;
+        u32 irq_status = DCSR(channel) & DMA_INT_MASK;
+
+        if (irq_status & DCSR_BUSERR) {
+
+                if (channel == drv_data->tx_channel)
+                        pxa2xx_spi_dma_error_stop(drv_data,
+                                "dma_handler: bad bus address on tx channel");
+                else
+                        pxa2xx_spi_dma_error_stop(drv_data,
+                                "dma_handler: bad bus address on rx channel");
+                return;
+        }
+
+        /* PXA255x_SSP has no timeout interrupt, wait for tailing bytes */
+        if ((channel == drv_data->tx_channel)
+                && (irq_status & DCSR_ENDINTR)
+                && (drv_data->ssp_type == PXA25x_SSP)) {
+
+                /* Wait for rx to stall */
+                if (wait_ssp_rx_stall(drv_data->ioaddr) == 0)
+                        dev_err(&drv_data->pdev->dev,
+                                "dma_handler: ssp rx stall failed\n");
+
+                /* finish this transfer, start the next */
+                pxa2xx_spi_dma_transfer_complete(drv_data);
+        }
+}
+
+irqreturn_t pxa2xx_spi_dma_transfer(struct driver_data *drv_data)
+{
+        u32 irq_status;
+        void __iomem *reg = drv_data->ioaddr;
+
+        irq_status = read_SSSR(reg) & drv_data->mask_sr;
+        if (irq_status & SSSR_ROR) {
+                pxa2xx_spi_dma_error_stop(drv_data,
+                                          "dma_transfer: fifo overrun");
+                return IRQ_HANDLED;
+        }
+
+        /* Check for false positive timeout */
+        if ((irq_status & SSSR_TINT)
+                && (DCSR(drv_data->tx_channel) & DCSR_RUN)) {
+                write_SSSR(SSSR_TINT, reg);
+                return IRQ_HANDLED;
+        }
+
+        if (irq_status & SSSR_TINT || drv_data->rx == drv_data->rx_end) {
+
+                /* Clear and disable timeout interrupt, do the rest in
+                 * dma_transfer_complete */
+                if (!pxa25x_ssp_comp(drv_data))
+                        write_SSTO(0, reg);
+
+                /* finish this transfer, start the next */
+                pxa2xx_spi_dma_transfer_complete(drv_data);
+
+                return IRQ_HANDLED;
+        }
+
+        /* Opps problem detected */
+        return IRQ_NONE;
+}
+
+int pxa2xx_spi_dma_prepare(struct driver_data *drv_data, u32 dma_burst)
+{
+        u32 dma_width;
+
+        switch (drv_data->n_bytes) {
+        case 1:
+                dma_width = DCMD_WIDTH1;
+                break;
+        case 2:
+                dma_width = DCMD_WIDTH2;
+                break;
+        default:
+                dma_width = DCMD_WIDTH4;
+                break;
+        }
+
+        /* Setup rx DMA Channel */
+        DCSR(drv_data->rx_channel) = RESET_DMA_CHANNEL;
+        DSADR(drv_data->rx_channel) = drv_data->ssdr_physical;
+        DTADR(drv_data->rx_channel) = drv_data->rx_dma;
+        if (drv_data->rx == drv_data->null_dma_buf)
+                /* No target address increment */
+                DCMD(drv_data->rx_channel) = DCMD_FLOWSRC
+                                                | dma_width
+                                                | dma_burst
+                                                | drv_data->len;
+        else
+                DCMD(drv_data->rx_channel) = DCMD_INCTRGADDR
+                                                | DCMD_FLOWSRC
+                                                | dma_width
+                                                | dma_burst
+                                                | drv_data->len;
+
+        /* Setup tx DMA Channel */
+        DCSR(drv_data->tx_channel) = RESET_DMA_CHANNEL;
+        DSADR(drv_data->tx_channel) = drv_data->tx_dma;
+        DTADR(drv_data->tx_channel) = drv_data->ssdr_physical;
+        if (drv_data->tx == drv_data->null_dma_buf)
+                /* No source address increment */
+                DCMD(drv_data->tx_channel) = DCMD_FLOWTRG
+                                                | dma_width
+                                                | dma_burst
+                                                | drv_data->len;
+        else
+                DCMD(drv_data->tx_channel) = DCMD_INCSRCADDR
+                                                | DCMD_FLOWTRG
+                                                | dma_width
+                                                | dma_burst
+                                                | drv_data->len;
+
+        /* Enable dma end irqs on SSP to detect end of transfer */
+        if (drv_data->ssp_type == PXA25x_SSP)
+                DCMD(drv_data->tx_channel) |= DCMD_ENDIRQEN;
+
+        return 0;
+}
+
+void pxa2xx_spi_dma_start(struct driver_data *drv_data)
+{
+        DCSR(drv_data->rx_channel) |= DCSR_RUN;
+        DCSR(drv_data->tx_channel) |= DCSR_RUN;
+}
+
+int pxa2xx_spi_dma_setup(struct driver_data *drv_data)
+{
+        struct device *dev = &drv_data->pdev->dev;
+        struct ssp_device *ssp = drv_data->ssp;
+
+        /* Get two DMA channels (rx and tx) */
+        drv_data->rx_channel = pxa_request_dma("pxa2xx_spi_ssp_rx",
+                                                DMA_PRIO_HIGH,
+                                                pxa2xx_spi_dma_handler,
+                                                drv_data);
+        if (drv_data->rx_channel < 0) {
+                dev_err(dev, "problem (%d) requesting rx channel\n",
+                        drv_data->rx_channel);
+                return -ENODEV;
+        }
+        drv_data->tx_channel = pxa_request_dma("pxa2xx_spi_ssp_tx",
+                                                DMA_PRIO_MEDIUM,
+                                                pxa2xx_spi_dma_handler,
+                                                drv_data);
+        if (drv_data->tx_channel < 0) {
+                dev_err(dev, "problem (%d) requesting tx channel\n",
+                        drv_data->tx_channel);
+                pxa_free_dma(drv_data->rx_channel);
+                return -ENODEV;
+        }
+
+        DRCMR(ssp->drcmr_rx) = DRCMR_MAPVLD | drv_data->rx_channel;
+        DRCMR(ssp->drcmr_tx) = DRCMR_MAPVLD | drv_data->tx_channel;
+
+        return 0;
+}
+
+void pxa2xx_spi_dma_release(struct driver_data *drv_data)
+{
+        struct ssp_device *ssp = drv_data->ssp;
+
+        DRCMR(ssp->drcmr_rx) = 0;
+        DRCMR(ssp->drcmr_tx) = 0;
+
+        if (drv_data->tx_channel != 0)
+                pxa_free_dma(drv_data->tx_channel);
+        if (drv_data->rx_channel != 0)
+                pxa_free_dma(drv_data->rx_channel);
+}
+
+void pxa2xx_spi_dma_resume(struct driver_data *drv_data)
+{
+        if (drv_data->rx_channel != -1)
+                DRCMR(drv_data->ssp->drcmr_rx) =
+                        DRCMR_MAPVLD | drv_data->rx_channel;
+        if (drv_data->tx_channel != -1)
+                DRCMR(drv_data->ssp->drcmr_tx) =
+                        DRCMR_MAPVLD | drv_data->tx_channel;
+}
+
+int pxa2xx_spi_set_dma_burst_and_threshold(struct chip_data *chip,
+                                           struct spi_device *spi,
+                                           u8 bits_per_word, u32 *burst_code,
+                                           u32 *threshold)
+{
+        struct pxa2xx_spi_chip *chip_info =
+                        (struct pxa2xx_spi_chip *)spi->controller_data;
+        int bytes_per_word;
+        int burst_bytes;
+        int thresh_words;
+        int req_burst_size;
+        int retval = 0;
+
+        /* Set the threshold (in registers) to equal the same amount of data
+         * as represented by burst size (in bytes).  The computation below
+         * is (burst_size rounded up to nearest 8 byte, word or long word)
+         * divided by (bytes/register); the tx threshold is the inverse of
+         * the rx, so that there will always be enough data in the rx fifo
+         * to satisfy a burst, and there will always be enough space in the
+         * tx fifo to accept a burst (a tx burst will overwrite the fifo if
+         * there is not enough space), there must always remain enough empty
+         * space in the rx fifo for any data loaded to the tx fifo.
+         * Whenever burst_size (in bytes) equals bits/word, the fifo threshold
+         * will be 8, or half the fifo;
+         * The threshold can only be set to 2, 4 or 8, but not 16, because
+         * to burst 16 to the tx fifo, the fifo would have to be empty;
+         * however, the minimum fifo trigger level is 1, and the tx will
+         * request service when the fifo is at this level, with only 15 spaces.
+         */
+
+        /* find bytes/word */
+        if (bits_per_word <= 8)
+                bytes_per_word = 1;
+        else if (bits_per_word <= 16)
+                bytes_per_word = 2;
+        else
+                bytes_per_word = 4;
+
+        /* use struct pxa2xx_spi_chip->dma_burst_size if available */
+        if (chip_info)
+                req_burst_size = chip_info->dma_burst_size;
+        else {
+                switch (chip->dma_burst_size) {
+                default:
+                        /* if the default burst size is not set,
+                         * do it now */
+                        chip->dma_burst_size = DCMD_BURST8;
+                case DCMD_BURST8:
+                        req_burst_size = 8;
+                        break;
+                case DCMD_BURST16:
+                        req_burst_size = 16;
+                        break;
+                case DCMD_BURST32:
+                        req_burst_size = 32;
+                        break;
+                }
+        }
+        if (req_burst_size <= 8) {
+                *burst_code = DCMD_BURST8;
+                burst_bytes = 8;
+        } else if (req_burst_size <= 16) {
+                if (bytes_per_word == 1) {
+                        /* don't burst more than 1/2 the fifo */
+                        *burst_code = DCMD_BURST8;
+                        burst_bytes = 8;
+                        retval = 1;
+                } else {
+                        *burst_code = DCMD_BURST16;
+                        burst_bytes = 16;
+                }
+        } else {
+                if (bytes_per_word == 1) {
+                        /* don't burst more than 1/2 the fifo */
+                        *burst_code = DCMD_BURST8;
+                        burst_bytes = 8;
+                        retval = 1;
+                } else if (bytes_per_word == 2) {
+                        /* don't burst more than 1/2 the fifo */
+                        *burst_code = DCMD_BURST16;
+                        burst_bytes = 16;
+                        retval = 1;
+                } else {
+                        *burst_code = DCMD_BURST32;
+                        burst_bytes = 32;
+                }
+        }
+
+        thresh_words = burst_bytes / bytes_per_word;
+
+        /* thresh_words will be between 2 and 8 */
+        *threshold = (SSCR1_RxTresh(thresh_words) & SSCR1_RFT)
+                        | (SSCR1_TxTresh(16-thresh_words) & SSCR1_TFT);
+
+        return retval;
+}
diff --git a/drivers/spi/spi-pxa2xx.c b/drivers/spi/spi-pxa2xx.c
index 5c8c4f5883c4..90b27a3508a6 100644
--- a/drivers/spi/spi-pxa2xx.c
+++ b/drivers/spi/spi-pxa2xx.c
@@ -1,5 +1,6 @@
 /*
  * Copyright (C) 2005 Stephen Street / StreetFire Sound Labs
+ * Copyright (C) 2013, Intel Corporation
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -24,17 +25,20 @@
 #include <linux/interrupt.h>
 #include <linux/platform_device.h>
 #include <linux/spi/pxa2xx_spi.h>
-#include <linux/dma-mapping.h>
 #include <linux/spi/spi.h>
 #include <linux/workqueue.h>
 #include <linux/delay.h>
 #include <linux/gpio.h>
 #include <linux/slab.h>
+#include <linux/clk.h>
+#include <linux/pm_runtime.h>
+#include <linux/acpi.h>
 
 #include <asm/io.h>
 #include <asm/irq.h>
 #include <asm/delay.h>
 
+#include "spi-pxa2xx.h"
 
 MODULE_AUTHOR("Stephen Street");
 MODULE_DESCRIPTION("PXA2xx SSP SPI Controller");
@@ -45,12 +49,6 @@ MODULE_ALIAS("platform:pxa2xx-spi");
 
 #define TIMOUT_DFLT             1000
 
-#define DMA_INT_MASK            (DCSR_ENDINTR | DCSR_STARTINTR | DCSR_BUSERR)
-#define RESET_DMA_CHANNEL       (DCSR_NODESC | DMA_INT_MASK)
-#define IS_DMA_ALIGNED(x)       ((((u32)(x)) & 0x07) == 0)
-#define MAX_DMA_LEN             8191
-#define DMA_ALIGNMENT           8
-
 /*
  * for testing SSCR1 changes that require SSP restart, basically
  * everything except the service and interrupt enables, the pxa270 developer
@@ -65,115 +63,97 @@ MODULE_ALIAS("platform:pxa2xx-spi");
                                 | SSCR1_RFT | SSCR1_TFT | SSCR1_MWDS \
                                 | SSCR1_SPH | SSCR1_SPO | SSCR1_LBM)
 
-#define DEFINE_SSP_REG(reg, off) \
-static inline u32 read_##reg(void const __iomem *p) \
-{ return __raw_readl(p + (off)); } \
-\
-static inline void write_##reg(u32 v, void __iomem *p) \
-{ __raw_writel(v, p + (off)); }
-
-DEFINE_SSP_REG(SSCR0, 0x00)
-DEFINE_SSP_REG(SSCR1, 0x04)
-DEFINE_SSP_REG(SSSR, 0x08)
-DEFINE_SSP_REG(SSITR, 0x0c)
-DEFINE_SSP_REG(SSDR, 0x10)
-DEFINE_SSP_REG(SSTO, 0x28)
-DEFINE_SSP_REG(SSPSP, 0x2c)
-
-#define START_STATE ((void*)0)
-#define RUNNING_STATE ((void*)1)
-#define DONE_STATE ((void*)2)
-#define ERROR_STATE ((void*)-1)
-
-#define QUEUE_RUNNING 0
-#define QUEUE_STOPPED 1
-
-struct driver_data {
-        /* Driver model hookup */
-        struct platform_device *pdev;
-
-        /* SSP Info */
-        struct ssp_device *ssp;
+#define LPSS_RX_THRESH_DFLT     64
+#define LPSS_TX_LOTHRESH_DFLT   160
+#define LPSS_TX_HITHRESH_DFLT   224
 
-        /* SPI framework hookup */
-        enum pxa_ssp_type ssp_type;
-        struct spi_master *master;
+/* Offset from drv_data->lpss_base */
+#define SPI_CS_CONTROL          0x18
+#define SPI_CS_CONTROL_SW_MODE  BIT(0)
+#define SPI_CS_CONTROL_CS_HIGH  BIT(1)
 
-        /* PXA hookup */
-        struct pxa2xx_spi_master *master_info;
-
-        /* DMA setup stuff */
-        int rx_channel;
-        int tx_channel;
-        u32 *null_dma_buf;
-
-        /* SSP register addresses */
-        void __iomem *ioaddr;
-        u32 ssdr_physical;
-
-        /* SSP masks*/
-        u32 dma_cr1;
-        u32 int_cr1;
-        u32 clear_sr;
-        u32 mask_sr;
-
-        /* Driver message queue */
-        struct workqueue_struct *workqueue;
-        struct work_struct pump_messages;
-        spinlock_t lock;
-        struct list_head queue;
-        int busy;
-        int run;
-
-        /* Message Transfer pump */
-        struct tasklet_struct pump_transfers;
-
-        /* Current message transfer state info */
-        struct spi_message* cur_msg;
-        struct spi_transfer* cur_transfer;
-        struct chip_data *cur_chip;
-        size_t len;
-        void *tx;
-        void *tx_end;
-        void *rx;
-        void *rx_end;
-        int dma_mapped;
-        dma_addr_t rx_dma;
-        dma_addr_t tx_dma;
-        size_t rx_map_len;
-        size_t tx_map_len;
-        u8 n_bytes;
-        u32 dma_width;
-        int (*write)(struct driver_data *drv_data);
-        int (*read)(struct driver_data *drv_data);
-        irqreturn_t (*transfer_handler)(struct driver_data *drv_data);
-        void (*cs_control)(u32 command);
-};
+static bool is_lpss_ssp(const struct driver_data *drv_data)
+{
+        return drv_data->ssp_type == LPSS_SSP;
+}
 
-struct chip_data {
-        u32 cr0;
-        u32 cr1;
-        u32 psp;
-        u32 timeout;
-        u8 n_bytes;
-        u32 dma_width;
-        u32 dma_burst_size;
-        u32 threshold;
-        u32 dma_threshold;
-        u8 enable_dma;
-        u8 bits_per_word;
-        u32 speed_hz;
-        union {
-                int gpio_cs;
-                unsigned int frm;
-        };
-        int gpio_cs_inverted;
-        int (*write)(struct driver_data *drv_data);
-        int (*read)(struct driver_data *drv_data);
-        void (*cs_control)(u32 command);
-};
+/*
+ * Read and write LPSS SSP private registers. Caller must first check that
+ * is_lpss_ssp() returns true before these can be called.
+ */
+static u32 __lpss_ssp_read_priv(struct driver_data *drv_data, unsigned offset)
+{
+        WARN_ON(!drv_data->lpss_base);
+        return readl(drv_data->lpss_base + offset);
+}
 
-static void pump_messages(struct work_struct *work);
+static void __lpss_ssp_write_priv(struct driver_data *drv_data,
+                                  unsigned offset, u32 value)
+{
+        WARN_ON(!drv_data->lpss_base);
+        writel(value, drv_data->lpss_base + offset);
+}
+
+/*
+ * lpss_ssp_setup - perform LPSS SSP specific setup
+ * @drv_data: pointer to the driver private data
+ *
+ * Perform LPSS SSP specific setup. This function must be called first if
+ * one is going to use LPSS SSP private registers.
+ */
+static void lpss_ssp_setup(struct driver_data *drv_data)
+{
+        unsigned offset = 0x400;
+        u32 value, orig;
+
+        if (!is_lpss_ssp(drv_data))
+                return;
+
+        /*
+         * Perform auto-detection of the LPSS SSP private registers. They
+         * can be either at 1k or 2k offset from the base address.
+         */
+        orig = readl(drv_data->ioaddr + offset + SPI_CS_CONTROL);
+
+        value = orig | SPI_CS_CONTROL_SW_MODE;
+        writel(value, drv_data->ioaddr + offset + SPI_CS_CONTROL);
+        value = readl(drv_data->ioaddr + offset + SPI_CS_CONTROL);
+        if (value != (orig | SPI_CS_CONTROL_SW_MODE)) {
+                offset = 0x800;
+                goto detection_done;
+        }
+
+        value &= ~SPI_CS_CONTROL_SW_MODE;
+        writel(value, drv_data->ioaddr + offset + SPI_CS_CONTROL);
+        value = readl(drv_data->ioaddr + offset + SPI_CS_CONTROL);
+        if (value != orig) {
+                offset = 0x800;
+                goto detection_done;
+        }
+
+detection_done:
+        /* Now set the LPSS base */
+        drv_data->lpss_base = drv_data->ioaddr + offset;
+
+        /* Enable software chip select control */
+        value = SPI_CS_CONTROL_SW_MODE | SPI_CS_CONTROL_CS_HIGH;
+        __lpss_ssp_write_priv(drv_data, SPI_CS_CONTROL, value);
+}
+
+static void lpss_ssp_cs_control(struct driver_data *drv_data, bool enable)
+{
+        u32 value;
+
+        if (!is_lpss_ssp(drv_data))
+                return;
+
+        value = __lpss_ssp_read_priv(drv_data, SPI_CS_CONTROL);
+        if (enable)
+                value &= ~SPI_CS_CONTROL_CS_HIGH;
+        else
+                value |= SPI_CS_CONTROL_CS_HIGH;
+        __lpss_ssp_write_priv(drv_data, SPI_CS_CONTROL, value);
+}
 
 static void cs_assert(struct driver_data *drv_data)
 {
@@ -189,8 +169,12 @@ static void cs_assert(struct driver_data *drv_data)
                 return;
         }
 
-        if (gpio_is_valid(chip->gpio_cs))
+        if (gpio_is_valid(chip->gpio_cs)) {
                 gpio_set_value(chip->gpio_cs, chip->gpio_cs_inverted);
+                return;
+        }
+
+        lpss_ssp_cs_control(drv_data, true);
 }
 
 static void cs_deassert(struct driver_data *drv_data)
@@ -205,30 +189,15 @@ static void cs_deassert(struct driver_data *drv_data)
                 return;
         }
 
-        if (gpio_is_valid(chip->gpio_cs))
+        if (gpio_is_valid(chip->gpio_cs)) {
                 gpio_set_value(chip->gpio_cs, !chip->gpio_cs_inverted);
-}
-
-static void write_SSSR_CS(struct driver_data *drv_data, u32 val)
-{
-        void __iomem *reg = drv_data->ioaddr;
-
-        if (drv_data->ssp_type == CE4100_SSP)
-                val |= read_SSSR(reg) & SSSR_ALT_FRM_MASK;
-
-        write_SSSR(val, reg);
-}
+                return;
+        }
 
-static int pxa25x_ssp_comp(struct driver_data *drv_data)
-{
-        if (drv_data->ssp_type == PXA25x_SSP)
-                return 1;
-        if (drv_data->ssp_type == CE4100_SSP)
-                return 1;
-        return 0;
+        lpss_ssp_cs_control(drv_data, false);
 }
 
-static int flush(struct driver_data *drv_data)
+int pxa2xx_spi_flush(struct driver_data *drv_data)
 {
         unsigned long limit = loops_per_jiffy << 1;
 
@@ -354,7 +323,7 @@ static int u32_reader(struct driver_data *drv_data)
         return drv_data->rx == drv_data->rx_end;
 }
 
-static void *next_transfer(struct driver_data *drv_data)
+void *pxa2xx_spi_next_transfer(struct driver_data *drv_data)
 {
         struct spi_message *msg = drv_data->cur_msg;
         struct spi_transfer *trans = drv_data->cur_transfer;
@@ -370,89 +339,15 @@ static void *next_transfer(struct driver_data *drv_data)
                 return DONE_STATE;
 }
 
-static int map_dma_buffers(struct driver_data *drv_data)
-{
-        struct spi_message *msg = drv_data->cur_msg;
-        struct device *dev = &msg->spi->dev;
-
-        if (!drv_data->cur_chip->enable_dma)
-                return 0;
-
-        if (msg->is_dma_mapped)
-                return  drv_data->rx_dma && drv_data->tx_dma;
-
-        if (!IS_DMA_ALIGNED(drv_data->rx) || !IS_DMA_ALIGNED(drv_data->tx))
-                return 0;
-
-        /* Modify setup if rx buffer is null */
-        if (drv_data->rx == NULL) {
-                *drv_data->null_dma_buf = 0;
-                drv_data->rx = drv_data->null_dma_buf;
-                drv_data->rx_map_len = 4;
-        } else
-                drv_data->rx_map_len = drv_data->len;
-
-
-        /* Modify setup if tx buffer is null */
-        if (drv_data->tx == NULL) {
-                *drv_data->null_dma_buf = 0;
-                drv_data->tx = drv_data->null_dma_buf;
-                drv_data->tx_map_len = 4;
-        } else
-                drv_data->tx_map_len = drv_data->len;
-
-        /* Stream map the tx buffer. Always do DMA_TO_DEVICE first
-         * so we flush the cache *before* invalidating it, in case
-         * the tx and rx buffers overlap.
-         */
-        drv_data->tx_dma = dma_map_single(dev, drv_data->tx,
-                                        drv_data->tx_map_len, DMA_TO_DEVICE);
-        if (dma_mapping_error(dev, drv_data->tx_dma))
-                return 0;
-
-        /* Stream map the rx buffer */
-        drv_data->rx_dma = dma_map_single(dev, drv_data->rx,
-                                        drv_data->rx_map_len, DMA_FROM_DEVICE);
-        if (dma_mapping_error(dev, drv_data->rx_dma)) {
-                dma_unmap_single(dev, drv_data->tx_dma,
-                                        drv_data->tx_map_len, DMA_TO_DEVICE);
-                return 0;
-        }
-
-        return 1;
-}
-
-static void unmap_dma_buffers(struct driver_data *drv_data)
-{
-        struct device *dev;
-
-        if (!drv_data->dma_mapped)
-                return;
-
-        if (!drv_data->cur_msg->is_dma_mapped) {
-                dev = &drv_data->cur_msg->spi->dev;
-                dma_unmap_single(dev, drv_data->rx_dma,
-                                        drv_data->rx_map_len, DMA_FROM_DEVICE);
-                dma_unmap_single(dev, drv_data->tx_dma,
-                                        drv_data->tx_map_len, DMA_TO_DEVICE);
-        }
-
-        drv_data->dma_mapped = 0;
-}
-
 /* caller already set message->status; dma and pio irqs are blocked */
 static void giveback(struct driver_data *drv_data)
 {
         struct spi_transfer* last_transfer;
-        unsigned long flags;
         struct spi_message *msg;
 
-        spin_lock_irqsave(&drv_data->lock, flags);
         msg = drv_data->cur_msg;
         drv_data->cur_msg = NULL;
         drv_data->cur_transfer = NULL;
-        queue_work(drv_data->workqueue, &drv_data->pump_messages);
-        spin_unlock_irqrestore(&drv_data->lock, flags);
 
         last_transfer = list_entry(msg->transfers.prev,
                                         struct spi_transfer,
@@ -481,13 +376,7 @@ static void giveback(struct driver_data *drv_data)
                  */
 
                 /* get a pointer to the next message, if any */
-                spin_lock_irqsave(&drv_data->lock, flags);
-                if (list_empty(&drv_data->queue))
-                        next_msg = NULL;
-                else
-                        next_msg = list_entry(drv_data->queue.next,
-                                        struct spi_message, queue);
-                spin_unlock_irqrestore(&drv_data->lock, flags);
+                next_msg = spi_get_next_queued_message(drv_data->master);
 
                 /* see if the next and current messages point
                  * to the same chip
@@ -498,168 +387,10 @@ static void giveback(struct driver_data *drv_data)
                         cs_deassert(drv_data);
         }
 
-        msg->state = NULL;
-        if (msg->complete)
-                msg->complete(msg->context);
-
+        spi_finalize_current_message(drv_data->master);
         drv_data->cur_chip = NULL;
 }
 
-static int wait_ssp_rx_stall(void const __iomem *ioaddr)
-{
-        unsigned long limit = loops_per_jiffy << 1;
-
-        while ((read_SSSR(ioaddr) & SSSR_BSY) && --limit)
-                cpu_relax();
-
-        return limit;
-}
-
-static int wait_dma_channel_stop(int channel)
-{
-        unsigned long limit = loops_per_jiffy << 1;
-
-        while (!(DCSR(channel) & DCSR_STOPSTATE) && --limit)
-                cpu_relax();
-
-        return limit;
-}
-
-static void dma_error_stop(struct driver_data *drv_data, const char *msg)
-{
-        void __iomem *reg = drv_data->ioaddr;
-
-        /* Stop and reset */
-        DCSR(drv_data->rx_channel) = RESET_DMA_CHANNEL;
-        DCSR(drv_data->tx_channel) = RESET_DMA_CHANNEL;
-        write_SSSR_CS(drv_data, drv_data->clear_sr);
-        write_SSCR1(read_SSCR1(reg) & ~drv_data->dma_cr1, reg);
-        if (!pxa25x_ssp_comp(drv_data))
-                write_SSTO(0, reg);
-        flush(drv_data);
-        write_SSCR0(read_SSCR0(reg) & ~SSCR0_SSE, reg);
-
-        unmap_dma_buffers(drv_data);
-
-        dev_err(&drv_data->pdev->dev, "%s\n", msg);
-
-        drv_data->cur_msg->state = ERROR_STATE;
-        tasklet_schedule(&drv_data->pump_transfers);
-}
-
-static void dma_transfer_complete(struct driver_data *drv_data)
-{
-        void __iomem *reg = drv_data->ioaddr;
-        struct spi_message *msg = drv_data->cur_msg;
-
-        /* Clear and disable interrupts on SSP and DMA channels*/
-        write_SSCR1(read_SSCR1(reg) & ~drv_data->dma_cr1, reg);
-        write_SSSR_CS(drv_data, drv_data->clear_sr);
-        DCSR(drv_data->tx_channel) = RESET_DMA_CHANNEL;
-        DCSR(drv_data->rx_channel) = RESET_DMA_CHANNEL;
-
-        if (wait_dma_channel_stop(drv_data->rx_channel) == 0)
-                dev_err(&drv_data->pdev->dev,
-                        "dma_handler: dma rx channel stop failed\n");
-
-        if (wait_ssp_rx_stall(drv_data->ioaddr) == 0)
-                dev_err(&drv_data->pdev->dev,
-                        "dma_transfer: ssp rx stall failed\n");
-
-        unmap_dma_buffers(drv_data);
-
-        /* update the buffer pointer for the amount completed in dma */
-        drv_data->rx += drv_data->len -
-                        (DCMD(drv_data->rx_channel) & DCMD_LENGTH);
-
-        /* read trailing data from fifo, it does not matter how many
-         * bytes are in the fifo just read until buffer is full
-         * or fifo is empty, which ever occurs first */
-        drv_data->read(drv_data);
-
-        /* return count of what was actually read */
-        msg->actual_length += drv_data->len -
-                                (drv_data->rx_end - drv_data->rx);
-
-        /* Transfer delays and chip select release are
-         * handled in pump_transfers or giveback
-         */
-
-        /* Move to next transfer */
-        msg->state = next_transfer(drv_data);
-
-        /* Schedule transfer tasklet */
-        tasklet_schedule(&drv_data->pump_transfers);
-}
-
-static void dma_handler(int channel, void *data)
-{
-        struct driver_data *drv_data = data;
-        u32 irq_status = DCSR(channel) & DMA_INT_MASK;
-
-        if (irq_status & DCSR_BUSERR) {
-
-                if (channel == drv_data->tx_channel)
-                        dma_error_stop(drv_data,
-                                        "dma_handler: "
-                                        "bad bus address on tx channel");
-                else
-                        dma_error_stop(drv_data,
-                                        "dma_handler: "
-                                        "bad bus address on rx channel");
-                return;
-        }
-
-        /* PXA255x_SSP has no timeout interrupt, wait for tailing bytes */
-        if ((channel == drv_data->tx_channel)
-                && (irq_status & DCSR_ENDINTR)
-                && (drv_data->ssp_type == PXA25x_SSP)) {
-
-                /* Wait for rx to stall */
-                if (wait_ssp_rx_stall(drv_data->ioaddr) == 0)
-                        dev_err(&drv_data->pdev->dev,
-                                "dma_handler: ssp rx stall failed\n");
-
-                /* finish this transfer, start the next */
-                dma_transfer_complete(drv_data);
-        }
-}
-
-static irqreturn_t dma_transfer(struct driver_data *drv_data)
-{
-        u32 irq_status;
-        void __iomem *reg = drv_data->ioaddr;
-
-        irq_status = read_SSSR(reg) & drv_data->mask_sr;
-        if (irq_status & SSSR_ROR) {
-                dma_error_stop(drv_data, "dma_transfer: fifo overrun");
-                return IRQ_HANDLED;
-        }
-
-        /* Check for false positive timeout */
-        if ((irq_status & SSSR_TINT)
-                && (DCSR(drv_data->tx_channel) & DCSR_RUN)) {
-                write_SSSR(SSSR_TINT, reg);
-                return IRQ_HANDLED;
-        }
-
-        if (irq_status & SSSR_TINT || drv_data->rx == drv_data->rx_end) {
-
-                /* Clear and disable timeout interrupt, do the rest in
-                 * dma_transfer_complete */
-                if (!pxa25x_ssp_comp(drv_data))
-                        write_SSTO(0, reg);
-
-                /* finish this transfer, start the next */
-                dma_transfer_complete(drv_data);
-
-                return IRQ_HANDLED;
-        }
-
-        /* Opps problem detected */
-        return IRQ_NONE;
-}
-
 static void reset_sccr1(struct driver_data *drv_data)
 {
         void __iomem *reg = drv_data->ioaddr;
@@ -681,7 +412,7 @@ static void int_error_stop(struct driver_data *drv_data, const char* msg)
         reset_sccr1(drv_data);
         if (!pxa25x_ssp_comp(drv_data))
                 write_SSTO(0, reg);
-        flush(drv_data);
+        pxa2xx_spi_flush(drv_data);
         write_SSCR0(read_SSCR0(reg) & ~SSCR0_SSE, reg);
 
         dev_err(&drv_data->pdev->dev, "%s\n", msg);
@@ -709,7 +440,7 @@ static void int_transfer_complete(struct driver_data *drv_data)
          */
 
         /* Move to next transfer */
-        drv_data->cur_msg->state = next_transfer(drv_data);
+        drv_data->cur_msg->state = pxa2xx_spi_next_transfer(drv_data);
 
         /* Schedule transfer tasklet */
         tasklet_schedule(&drv_data->pump_transfers);
@@ -789,10 +520,20 @@ static irqreturn_t ssp_int(int irq, void *dev_id)
 {
         struct driver_data *drv_data = dev_id;
         void __iomem *reg = drv_data->ioaddr;
-        u32 sccr1_reg = read_SSCR1(reg);
+        u32 sccr1_reg;
         u32 mask = drv_data->mask_sr;
         u32 status;
 
+        /*
+         * The IRQ might be shared with other peripherals so we must first
+         * check that are we RPM suspended or not. If we are we assume that
+         * the IRQ was not for us (we shouldn't be RPM suspended when the
+         * interrupt is enabled).
+         */
+        if (pm_runtime_suspended(&drv_data->pdev->dev))
+                return IRQ_NONE;
+
+        sccr1_reg = read_SSCR1(reg);
         status = read_SSSR(reg);
 
         /* Ignore possible writes if we don't need to write */
@@ -820,106 +561,12 @@ static irqreturn_t ssp_int(int irq, void *dev_id)
         return drv_data->transfer_handler(drv_data);
 }
 
-static int set_dma_burst_and_threshold(struct chip_data *chip,
-                                struct spi_device *spi,
-                                u8 bits_per_word, u32 *burst_code,
-                                u32 *threshold)
+static unsigned int ssp_get_clk_div(struct driver_data *drv_data, int rate)
 {
-        struct pxa2xx_spi_chip *chip_info =
-                        (struct pxa2xx_spi_chip *)spi->controller_data;
-        int bytes_per_word;
-        int burst_bytes;
-        int thresh_words;
-        int req_burst_size;
-        int retval = 0;
-
-        /* Set the threshold (in registers) to equal the same amount of data
-         * as represented by burst size (in bytes).  The computation below
-         * is (burst_size rounded up to nearest 8 byte, word or long word)
-         * divided by (bytes/register); the tx threshold is the inverse of
-         * the rx, so that there will always be enough data in the rx fifo
-         * to satisfy a burst, and there will always be enough space in the
-         * tx fifo to accept a burst (a tx burst will overwrite the fifo if
-         * there is not enough space), there must always remain enough empty
-         * space in the rx fifo for any data loaded to the tx fifo.
-         * Whenever burst_size (in bytes) equals bits/word, the fifo threshold
-         * will be 8, or half the fifo;
-         * The threshold can only be set to 2, 4 or 8, but not 16, because
-         * to burst 16 to the tx fifo, the fifo would have to be empty;
-         * however, the minimum fifo trigger level is 1, and the tx will
-         * request service when the fifo is at this level, with only 15 spaces.
-         */
+        unsigned long ssp_clk = drv_data->max_clk_rate;
+        const struct ssp_device *ssp = drv_data->ssp;
 
-        /* find bytes/word */
-        if (bits_per_word <= 8)
-                bytes_per_word = 1;
-        else if (bits_per_word <= 16)
-                bytes_per_word = 2;
-        else
-                bytes_per_word = 4;
-
-        /* use struct pxa2xx_spi_chip->dma_burst_size if available */
-        if (chip_info)
-                req_burst_size = chip_info->dma_burst_size;
-        else {
-                switch (chip->dma_burst_size) {
-                default:
-                        /* if the default burst size is not set,
-                         * do it now */
-                        chip->dma_burst_size = DCMD_BURST8;
-                case DCMD_BURST8:
-                        req_burst_size = 8;
-                        break;
-                case DCMD_BURST16:
-                        req_burst_size = 16;
-                        break;
-                case DCMD_BURST32:
-                        req_burst_size = 32;
-                        break;
-                }
-        }
-        if (req_burst_size <= 8) {
-                *burst_code = DCMD_BURST8;
-                burst_bytes = 8;
-        } else if (req_burst_size <= 16) {
-                if (bytes_per_word == 1) {
-                        /* don't burst more than 1/2 the fifo */
-                        *burst_code = DCMD_BURST8;
-                        burst_bytes = 8;
-                        retval = 1;
-                } else {
-                        *burst_code = DCMD_BURST16;
-                        burst_bytes = 16;
-                }
-        } else {
-                if (bytes_per_word == 1) {
-                        /* don't burst more than 1/2 the fifo */
-                        *burst_code = DCMD_BURST8;
-                        burst_bytes = 8;
-                        retval = 1;
-                } else if (bytes_per_word == 2) {
-                        /* don't burst more than 1/2 the fifo */
-                        *burst_code = DCMD_BURST16;
-                        burst_bytes = 16;
-                        retval = 1;
-                } else {
-                        *burst_code = DCMD_BURST32;
-                        burst_bytes = 32;
-                }
-        }
-
-        thresh_words = burst_bytes / bytes_per_word;
-
-        /* thresh_words will be between 2 and 8 */
-        *threshold = (SSCR1_RxTresh(thresh_words) & SSCR1_RFT)
-                        | (SSCR1_TxTresh(16-thresh_words) & SSCR1_TFT);
-
-        return retval;
-}
-
-static unsigned int ssp_get_clk_div(struct ssp_device *ssp, int rate)
-{
-        unsigned long ssp_clk = clk_get_rate(ssp->clk);
+        rate = min_t(int, ssp_clk, rate);
 
         if (ssp->type == PXA25x_SSP || ssp->type == CE4100_SSP)
                 return ((ssp_clk / (2 * rate) - 1) & 0xff) << 8;
@@ -934,7 +581,6 @@ static void pump_transfers(unsigned long data)
         struct spi_transfer *transfer = NULL;
         struct spi_transfer *previous = NULL;
         struct chip_data *chip = NULL;
-        struct ssp_device *ssp = drv_data->ssp;
         void __iomem *reg = drv_data->ioaddr;
         u32 clk_div = 0;
         u8 bits = 0;
@@ -976,8 +622,8 @@ static void pump_transfers(unsigned long data)
                         cs_deassert(drv_data);
         }
 
-        /* Check for transfers that need multiple DMA segments */
-        if (transfer->len > MAX_DMA_LEN && chip->enable_dma) {
+        /* Check if we can DMA this transfer */
+        if (!pxa2xx_spi_dma_is_possible(transfer->len) && chip->enable_dma) {
 
                 /* reject already-mapped transfers; PIO won't always work */
                 if (message->is_dma_mapped
@@ -1000,21 +646,20 @@ static void pump_transfers(unsigned long data)
         }
 
         /* Setup the transfer state based on the type of transfer */
-        if (flush(drv_data) == 0) {
+        if (pxa2xx_spi_flush(drv_data) == 0) {
                 dev_err(&drv_data->pdev->dev, "pump_transfers: flush failed\n");
                 message->status = -EIO;
                 giveback(drv_data);
                 return;
         }
         drv_data->n_bytes = chip->n_bytes;
-        drv_data->dma_width = chip->dma_width;
         drv_data->tx = (void *)transfer->tx_buf;
         drv_data->tx_end = drv_data->tx + transfer->len;
         drv_data->rx = transfer->rx_buf;
         drv_data->rx_end = drv_data->rx + transfer->len;
         drv_data->rx_dma = transfer->rx_dma;
         drv_data->tx_dma = transfer->tx_dma;
-        drv_data->len = transfer->len & DCMD_LENGTH;
+        drv_data->len = transfer->len;
         drv_data->write = drv_data->tx ? chip->write : null_writer;
         drv_data->read = drv_data->rx ? chip->read : null_reader;
 
@@ -1031,25 +676,22 @@ static void pump_transfers(unsigned long data)
                 if (transfer->bits_per_word)
                         bits = transfer->bits_per_word;
 
-                clk_div = ssp_get_clk_div(ssp, speed);
+                clk_div = ssp_get_clk_div(drv_data, speed);
 
                 if (bits <= 8) {
                         drv_data->n_bytes = 1;
-                        drv_data->dma_width = DCMD_WIDTH1;
                         drv_data->read = drv_data->read != null_reader ?
                                                 u8_reader : null_reader;
                         drv_data->write = drv_data->write != null_writer ?
                                                 u8_writer : null_writer;
                 } else if (bits <= 16) {
                         drv_data->n_bytes = 2;
-                        drv_data->dma_width = DCMD_WIDTH2;
                         drv_data->read = drv_data->read != null_reader ?
                                                 u16_reader : null_reader;
                         drv_data->write = drv_data->write != null_writer ?
                                                 u16_writer : null_writer;
                 } else if (bits <= 32) {
                         drv_data->n_bytes = 4;
-                        drv_data->dma_width = DCMD_WIDTH4;
                         drv_data->read = drv_data->read != null_reader ?
                                                 u32_reader : null_reader;
                         drv_data->write = drv_data->write != null_writer ?
@@ -1058,7 +700,8 @@ static void pump_transfers(unsigned long data)
                 /* if bits/word is changed in dma mode, then must check the
                  * thresholds and burst also */
                 if (chip->enable_dma) {
-                        if (set_dma_burst_and_threshold(chip, message->spi,
+                        if (pxa2xx_spi_set_dma_burst_and_threshold(chip,
+                                                        message->spi,
                                                         bits, &dma_burst,
                                                         &dma_thresh))
                                 if (printk_ratelimit())
@@ -1077,70 +720,21 @@ static void pump_transfers(unsigned long data)
 
         message->state = RUNNING_STATE;
 
-        /* Try to map dma buffer and do a dma transfer if successful, but
-         * only if the length is non-zero and less than MAX_DMA_LEN.
-         *
-         * Zero-length non-descriptor DMA is illegal on PXA2xx; force use
-         * of PIO instead.  Care is needed above because the transfer may
-         * have have been passed with buffers that are already dma mapped.
-         * A zero-length transfer in PIO mode will not try to write/read
-         * to/from the buffers
-         *
-         * REVISIT large transfers are exactly where we most want to be
-         * using DMA.  If this happens much, split those transfers into
-         * multiple DMA segments rather than forcing PIO.
-         */
         drv_data->dma_mapped = 0;
-        if (drv_data->len > 0 && drv_data->len <= MAX_DMA_LEN)
-                drv_data->dma_mapped = map_dma_buffers(drv_data);
+        if (pxa2xx_spi_dma_is_possible(drv_data->len))
+                drv_data->dma_mapped = pxa2xx_spi_map_dma_buffers(drv_data);
         if (drv_data->dma_mapped) {
 
                 /* Ensure we have the correct interrupt handler */
-                drv_data->transfer_handler = dma_transfer;
-
-                /* Setup rx DMA Channel */
-                DCSR(drv_data->rx_channel) = RESET_DMA_CHANNEL;
-                DSADR(drv_data->rx_channel) = drv_data->ssdr_physical;
-                DTADR(drv_data->rx_channel) = drv_data->rx_dma;
-                if (drv_data->rx == drv_data->null_dma_buf)
-                        /* No target address increment */
-                        DCMD(drv_data->rx_channel) = DCMD_FLOWSRC
-                                                        | drv_data->dma_width
-                                                        | dma_burst
-                                                        | drv_data->len;
-                else
-                        DCMD(drv_data->rx_channel) = DCMD_INCTRGADDR
-                                                        | DCMD_FLOWSRC
-                                                        | drv_data->dma_width
-                                                        | dma_burst
-                                                        | drv_data->len;
-
-                /* Setup tx DMA Channel */
-                DCSR(drv_data->tx_channel) = RESET_DMA_CHANNEL;
-                DSADR(drv_data->tx_channel) = drv_data->tx_dma;
-                DTADR(drv_data->tx_channel) = drv_data->ssdr_physical;
-                if (drv_data->tx == drv_data->null_dma_buf)
-                        /* No source address increment */
-                        DCMD(drv_data->tx_channel) = DCMD_FLOWTRG
-                                                        | drv_data->dma_width
-                                                        | dma_burst
-                                                        | drv_data->len;
-                else
-                        DCMD(drv_data->tx_channel) = DCMD_INCSRCADDR
-                                                        | DCMD_FLOWTRG
-                                                        | drv_data->dma_width
-                                                        | dma_burst
-                                                        | drv_data->len;
-
-                /* Enable dma end irqs on SSP to detect end of transfer */
-                if (drv_data->ssp_type == PXA25x_SSP)
-                        DCMD(drv_data->tx_channel) |= DCMD_ENDIRQEN;
+                drv_data->transfer_handler = pxa2xx_spi_dma_transfer;
+
+                pxa2xx_spi_dma_prepare(drv_data, dma_burst);
 
                 /* Clear status and start DMA engine */
                 cr1 = chip->cr1 | dma_thresh | drv_data->dma_cr1;
                 write_SSSR(drv_data->clear_sr, reg);
-                DCSR(drv_data->rx_channel) |= DCSR_RUN;
-                DCSR(drv_data->tx_channel) |= DCSR_RUN;
+
+                pxa2xx_spi_dma_start(drv_data);
         } else {
                 /* Ensure we have the correct interrupt handler */
                 drv_data->transfer_handler = interrupt_transfer;
@@ -1150,6 +744,13 @@ static void pump_transfers(unsigned long data)
                 write_SSSR_CS(drv_data, drv_data->clear_sr);
         }
 
+        if (is_lpss_ssp(drv_data)) {
+                if ((read_SSIRF(reg) & 0xff) != chip->lpss_rx_threshold)
+                        write_SSIRF(chip->lpss_rx_threshold, reg);
+                if ((read_SSITF(reg) & 0xffff) != chip->lpss_tx_threshold)
+                        write_SSITF(chip->lpss_tx_threshold, reg);
+        }
+
         /* see if we need to reload the config registers */
         if ((read_SSCR0(reg) != cr0)
                 || (read_SSCR1(reg) & SSCR1_CHANGE_MASK) !=
@@ -1176,31 +777,12 @@ static void pump_transfers(unsigned long data)
         write_SSCR1(cr1, reg);
 }
 
-static void pump_messages(struct work_struct *work)
+static int pxa2xx_spi_transfer_one_message(struct spi_master *master,
+                                           struct spi_message *msg)
 {
-        struct driver_data *drv_data =
-                container_of(work, struct driver_data, pump_messages);
-        unsigned long flags;
-
-        /* Lock queue and check for queue work */
-        spin_lock_irqsave(&drv_data->lock, flags);
-        if (list_empty(&drv_data->queue) || drv_data->run == QUEUE_STOPPED) {
-                drv_data->busy = 0;
-                spin_unlock_irqrestore(&drv_data->lock, flags);
-                return;
-        }
-
-        /* Make sure we are not already running a message */
-        if (drv_data->cur_msg) {
-                spin_unlock_irqrestore(&drv_data->lock, flags);
-                return;
-        }
-
-        /* Extract head of queue */
-        drv_data->cur_msg = list_entry(drv_data->queue.next,
-                                        struct spi_message, queue);
-        list_del_init(&drv_data->cur_msg->queue);
+        struct driver_data *drv_data = spi_master_get_devdata(master);
 
+        drv_data->cur_msg = msg;
         /* Initial message state*/
         drv_data->cur_msg->state = START_STATE;
         drv_data->cur_transfer = list_entry(drv_data->cur_msg->transfers.next,
@@ -1213,34 +795,27 @@ static void pump_messages(struct work_struct *work)
 
         /* Mark as busy and launch transfers */
         tasklet_schedule(&drv_data->pump_transfers);
-
-        drv_data->busy = 1;
-        spin_unlock_irqrestore(&drv_data->lock, flags);
+        return 0;
 }
 
-static int transfer(struct spi_device *spi, struct spi_message *msg)
+static int pxa2xx_spi_prepare_transfer(struct spi_master *master)
 {
-        struct driver_data *drv_data = spi_master_get_devdata(spi->master);
-        unsigned long flags;
-
-        spin_lock_irqsave(&drv_data->lock, flags);
-
-        if (drv_data->run == QUEUE_STOPPED) {
-                spin_unlock_irqrestore(&drv_data->lock, flags);
-                return -ESHUTDOWN;
-        }
-
-        msg->actual_length = 0;
-        msg->status = -EINPROGRESS;
-        msg->state = START_STATE;
+        struct driver_data *drv_data = spi_master_get_devdata(master);
 
-        list_add_tail(&msg->queue, &drv_data->queue);
+        pm_runtime_get_sync(&drv_data->pdev->dev);
+        return 0;
+}
 
-        if (drv_data->run == QUEUE_RUNNING && !drv_data->busy)
-                queue_work(drv_data->workqueue, &drv_data->pump_messages);
+static int pxa2xx_spi_unprepare_transfer(struct spi_master *master)
+{
+        struct driver_data *drv_data = spi_master_get_devdata(master);
 
-        spin_unlock_irqrestore(&drv_data->lock, flags);
+        /* Disable the SSP now */
+        write_SSCR0(read_SSCR0(drv_data->ioaddr) & ~SSCR0_SSE,
+                    drv_data->ioaddr);
 
+        pm_runtime_mark_last_busy(&drv_data->pdev->dev);
+        pm_runtime_put_autosuspend(&drv_data->pdev->dev);
         return 0;
 }
 
@@ -1287,10 +862,18 @@ static int setup(struct spi_device *spi)
         struct pxa2xx_spi_chip *chip_info = NULL;
         struct chip_data *chip;
         struct driver_data *drv_data = spi_master_get_devdata(spi->master);
-        struct ssp_device *ssp = drv_data->ssp;
         unsigned int clk_div;
-        uint tx_thres = TX_THRESH_DFLT;
-        uint rx_thres = RX_THRESH_DFLT;
+        uint tx_thres, tx_hi_thres, rx_thres;
+
+        if (is_lpss_ssp(drv_data)) {
+                tx_thres = LPSS_TX_LOTHRESH_DFLT;
+                tx_hi_thres = LPSS_TX_HITHRESH_DFLT;
+                rx_thres = LPSS_RX_THRESH_DFLT;
+        } else {
+                tx_thres = TX_THRESH_DFLT;
+                tx_hi_thres = 0;
+                rx_thres = RX_THRESH_DFLT;
+        }
 
         if (!pxa25x_ssp_comp(drv_data)
                 && (spi->bits_per_word < 4 || spi->bits_per_word > 32)) {
@@ -1330,8 +913,6 @@ static int setup(struct spi_device *spi)
                         chip->gpio_cs = -1;
                 chip->enable_dma = 0;
                 chip->timeout = TIMOUT_DFLT;
-                chip->dma_burst_size = drv_data->master_info->enable_dma ?
-                                        DCMD_BURST8 : 0;
         }
 
         /* protocol drivers may change the chip settings, so...
@@ -1345,23 +926,37 @@ static int setup(struct spi_device *spi)
                         chip->timeout = chip_info->timeout;
                 if (chip_info->tx_threshold)
                         tx_thres = chip_info->tx_threshold;
+                if (chip_info->tx_hi_threshold)
+                        tx_hi_thres = chip_info->tx_hi_threshold;
                 if (chip_info->rx_threshold)
                         rx_thres = chip_info->rx_threshold;
                 chip->enable_dma = drv_data->master_info->enable_dma;
                 chip->dma_threshold = 0;
                 if (chip_info->enable_loopback)
                         chip->cr1 = SSCR1_LBM;
+        } else if (ACPI_HANDLE(&spi->dev)) {
+                /*
+                 * Slave devices enumerated from ACPI namespace don't
+                 * usually have chip_info but we still might want to use
+                 * DMA with them.
+                 */
+                chip->enable_dma = drv_data->master_info->enable_dma;
         }
 
         chip->threshold = (SSCR1_RxTresh(rx_thres) & SSCR1_RFT) |
                         (SSCR1_TxTresh(tx_thres) & SSCR1_TFT);
 
+        chip->lpss_rx_threshold = SSIRF_RxThresh(rx_thres);
+        chip->lpss_tx_threshold = SSITF_TxLoThresh(tx_thres)
+                                | SSITF_TxHiThresh(tx_hi_thres);
+
         /* set dma burst and threshold outside of chip_info path so that if
          * chip_info goes away after setting chip->enable_dma, the
          * burst and threshold can still respond to changes in bits_per_word */
         if (chip->enable_dma) {
                 /* set up legal burst and threshold for dma */
-                if (set_dma_burst_and_threshold(chip, spi, spi->bits_per_word,
+                if (pxa2xx_spi_set_dma_burst_and_threshold(chip, spi,
+                                                spi->bits_per_word,
                                                 &chip->dma_burst_size,
                                                 &chip->dma_threshold)) {
                         dev_warn(&spi->dev, "in setup: DMA burst size reduced "
@@ -1369,7 +964,7 @@ static int setup(struct spi_device *spi)
                 }
         }
 
-        clk_div = ssp_get_clk_div(ssp, spi->max_speed_hz);
+        clk_div = ssp_get_clk_div(drv_data, spi->max_speed_hz);
         chip->speed_hz = spi->max_speed_hz;
 
         chip->cr0 = clk_div
@@ -1382,32 +977,32 @@ static int setup(struct spi_device *spi)
         chip->cr1 |= (((spi->mode & SPI_CPHA) != 0) ? SSCR1_SPH : 0)
                         | (((spi->mode & SPI_CPOL) != 0) ? SSCR1_SPO : 0);
 
+        if (spi->mode & SPI_LOOP)
+                chip->cr1 |= SSCR1_LBM;
+
         /* NOTE:  PXA25x_SSP _could_ use external clocking ... */
         if (!pxa25x_ssp_comp(drv_data))
                 dev_dbg(&spi->dev, "%ld Hz actual, %s\n",
-                        clk_get_rate(ssp->clk)
+                        drv_data->max_clk_rate
                                 / (1 + ((chip->cr0 & SSCR0_SCR(0xfff)) >> 8)),
                         chip->enable_dma ? "DMA" : "PIO");
         else
                 dev_dbg(&spi->dev, "%ld Hz actual, %s\n",
-                        clk_get_rate(ssp->clk) / 2
+                        drv_data->max_clk_rate / 2
                                 / (1 + ((chip->cr0 & SSCR0_SCR(0x0ff)) >> 8)),
                         chip->enable_dma ? "DMA" : "PIO");
 
         if (spi->bits_per_word <= 8) {
                 chip->n_bytes = 1;
-                chip->dma_width = DCMD_WIDTH1;
                 chip->read = u8_reader;
                 chip->write = u8_writer;
         } else if (spi->bits_per_word <= 16) {
                 chip->n_bytes = 2;
-                chip->dma_width = DCMD_WIDTH2;
                 chip->read = u16_reader;
                 chip->write = u16_writer;
         } else if (spi->bits_per_word <= 32) {
                 chip->cr0 |= SSCR0_EDSS;
                 chip->n_bytes = 4;
-                chip->dma_width = DCMD_WIDTH4;
                 chip->read = u32_reader;
                 chip->write = u32_writer;
         } else {
@@ -1438,93 +1033,98 @@ static void cleanup(struct spi_device *spi)
         kfree(chip);
 }
 
-static int init_queue(struct driver_data *drv_data)
+#ifdef CONFIG_ACPI
+static int pxa2xx_spi_acpi_add_dma(struct acpi_resource *res, void *data)
 {
-        INIT_LIST_HEAD(&drv_data->queue);
-        spin_lock_init(&drv_data->lock);
-
-        drv_data->run = QUEUE_STOPPED;
-        drv_data->busy = 0;
-
-        tasklet_init(&drv_data->pump_transfers,
-                        pump_transfers, (unsigned long)drv_data);
-
-        INIT_WORK(&drv_data->pump_messages, pump_messages);
-        drv_data->workqueue = create_singlethread_workqueue(
-                                dev_name(drv_data->master->dev.parent));
-        if (drv_data->workqueue == NULL)
-                return -EBUSY;
+        struct pxa2xx_spi_master *pdata = data;
+
+        if (res->type == ACPI_RESOURCE_TYPE_FIXED_DMA) {
+                const struct acpi_resource_fixed_dma *dma;
+
+                dma = &res->data.fixed_dma;
+                if (pdata->tx_slave_id < 0) {
+                        pdata->tx_slave_id = dma->request_lines;
+                        pdata->tx_chan_id = dma->channels;
+                } else if (pdata->rx_slave_id < 0) {
+                        pdata->rx_slave_id = dma->request_lines;
+                        pdata->rx_chan_id = dma->channels;
+                }
+        }
 
-        return 0;
+        /* Tell the ACPI core to skip this resource */
+        return 1;
 }
 
-static int start_queue(struct driver_data *drv_data)
+static struct pxa2xx_spi_master *
+pxa2xx_spi_acpi_get_pdata(struct platform_device *pdev)
 {
-        unsigned long flags;
-
-        spin_lock_irqsave(&drv_data->lock, flags);
-
-        if (drv_data->run == QUEUE_RUNNING || drv_data->busy) {
-                spin_unlock_irqrestore(&drv_data->lock, flags);
-                return -EBUSY;
+        struct pxa2xx_spi_master *pdata;
+        struct list_head resource_list;
+        struct acpi_device *adev;
+        struct ssp_device *ssp;
+        struct resource *res;
+        int devid;
+
+        if (!ACPI_HANDLE(&pdev->dev) ||
+            acpi_bus_get_device(ACPI_HANDLE(&pdev->dev), &adev))
+                return NULL;
+
+        pdata = devm_kzalloc(&pdev->dev, sizeof(*ssp), GFP_KERNEL);
+        if (!pdata) {
+                dev_err(&pdev->dev,
+                        "failed to allocate memory for platform data\n");
+                return NULL;
         }
 
-        drv_data->run = QUEUE_RUNNING;
-        drv_data->cur_msg = NULL;
-        drv_data->cur_transfer = NULL;
-        drv_data->cur_chip = NULL;
-        spin_unlock_irqrestore(&drv_data->lock, flags);
-
-        queue_work(drv_data->workqueue, &drv_data->pump_messages);
+        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+        if (!res)
+                return NULL;
 
-        return 0;
-}
+        ssp = &pdata->ssp;
 
-static int stop_queue(struct driver_data *drv_data)
-{
-        unsigned long flags;
-        unsigned limit = 500;
-        int status = 0;
-
-        spin_lock_irqsave(&drv_data->lock, flags);
-
-        /* This is a bit lame, but is optimized for the common execution path.
-         * A wait_queue on the drv_data->busy could be used, but then the common
-         * execution path (pump_messages) would be required to call wake_up or
-         * friends on every SPI message. Do this instead */
-        drv_data->run = QUEUE_STOPPED;
-        while ((!list_empty(&drv_data->queue) || drv_data->busy) && limit--) {
-                spin_unlock_irqrestore(&drv_data->lock, flags);
-                msleep(10);
-                spin_lock_irqsave(&drv_data->lock, flags);
+        ssp->phys_base = res->start;
+        ssp->mmio_base = devm_request_and_ioremap(&pdev->dev, res);
+        if (!ssp->mmio_base) {
+                dev_err(&pdev->dev, "failed to ioremap mmio_base\n");
+                return NULL;
         }
 
-        if (!list_empty(&drv_data->queue) || drv_data->busy)
-                status = -EBUSY;
+        ssp->clk = devm_clk_get(&pdev->dev, NULL);
+        ssp->irq = platform_get_irq(pdev, 0);
+        ssp->type = LPSS_SSP;
+        ssp->pdev = pdev;
 
-        spin_unlock_irqrestore(&drv_data->lock, flags);
+        ssp->port_id = -1;
+        if (adev->pnp.unique_id && !kstrtoint(adev->pnp.unique_id, 0, &devid))
+                ssp->port_id = devid;
 
-        return status;
-}
+        pdata->num_chipselect = 1;
+        pdata->rx_slave_id = -1;
+        pdata->tx_slave_id = -1;
 
-static int destroy_queue(struct driver_data *drv_data)
-{
-        int status;
+        INIT_LIST_HEAD(&resource_list);
+        acpi_dev_get_resources(adev, &resource_list, pxa2xx_spi_acpi_add_dma,
+                               pdata);
+        acpi_dev_free_resource_list(&resource_list);
 
-        status = stop_queue(drv_data);
-        /* we are unloading the module or failing to load (only two calls
-         * to this routine), and neither call can handle a return value.
-         * However, destroy_workqueue calls flush_workqueue, and that will
-         * block until all work is done.  If the reason that stop_queue
-         * timed out is that the work will never finish, then it does no
-         * good to call destroy_workqueue, so return anyway. */
-        if (status != 0)
-                return status;
+        pdata->enable_dma = pdata->rx_slave_id >= 0 && pdata->tx_slave_id >= 0;
 
-        destroy_workqueue(drv_data->workqueue);
+        return pdata;
+}
 
-        return 0;
+static struct acpi_device_id pxa2xx_spi_acpi_match[] = {
+        { "INT33C0", 0 },
+        { "INT33C1", 0 },
+        { },
+};
+MODULE_DEVICE_TABLE(acpi, pxa2xx_spi_acpi_match);
+#else
+static inline struct pxa2xx_spi_master *
+pxa2xx_spi_acpi_get_pdata(struct platform_device *pdev)
+{
+        return NULL;
 }
+#endif
 
 static int pxa2xx_spi_probe(struct platform_device *pdev)
 {
@@ -1535,11 +1135,21 @@ static int pxa2xx_spi_probe(struct platform_device *pdev)
         struct ssp_device *ssp;
         int status;
 
-        platform_info = dev->platform_data;
+        platform_info = dev_get_platdata(dev);
+        if (!platform_info) {
+                platform_info = pxa2xx_spi_acpi_get_pdata(pdev);
+                if (!platform_info) {
+                        dev_err(&pdev->dev, "missing platform data\n");
+                        return -ENODEV;
+                }
+        }
 
         ssp = pxa_ssp_request(pdev->id, pdev->name);
-        if (ssp == NULL) {
-                dev_err(&pdev->dev, "failed to request SSP%d\n", pdev->id);
+        if (!ssp)
+                ssp = &platform_info->ssp;
+
+        if (!ssp->mmio_base) {
+                dev_err(&pdev->dev, "failed to get ssp\n");
                 return -ENODEV;
         }
 
@@ -1558,19 +1168,21 @@ static int pxa2xx_spi_probe(struct platform_device *pdev)
 
         master->dev.parent = &pdev->dev;
         master->dev.of_node = pdev->dev.of_node;
+        ACPI_HANDLE_SET(&master->dev, ACPI_HANDLE(&pdev->dev));
         /* the spi->mode bits understood by this driver: */
-        master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH;
+        master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH | SPI_LOOP;
 
-        master->bus_num = pdev->id;
+        master->bus_num = ssp->port_id;
         master->num_chipselect = platform_info->num_chipselect;
         master->dma_alignment = DMA_ALIGNMENT;
         master->cleanup = cleanup;
         master->setup = setup;
-        master->transfer = transfer;
+        master->transfer_one_message = pxa2xx_spi_transfer_one_message;
+        master->prepare_transfer_hardware = pxa2xx_spi_prepare_transfer;
+        master->unprepare_transfer_hardware = pxa2xx_spi_unprepare_transfer;
 
         drv_data->ssp_type = ssp->type;
-        drv_data->null_dma_buf = (u32 *)ALIGN((u32)(drv_data +
-                                                sizeof(struct driver_data)), 8);
+        drv_data->null_dma_buf = (u32 *)PTR_ALIGN(&drv_data[1], DMA_ALIGNMENT);
 
         drv_data->ioaddr = ssp->mmio_base;
         drv_data->ssdr_physical = ssp->phys_base + SSDR;
@@ -1581,7 +1193,7 @@ static int pxa2xx_spi_probe(struct platform_device *pdev)
                 drv_data->mask_sr = SSSR_RFS | SSSR_TFS | SSSR_ROR;
         } else {
                 drv_data->int_cr1 = SSCR1_TIE | SSCR1_RIE | SSCR1_TINTE;
-                drv_data->dma_cr1 = SSCR1_TSRE | SSCR1_RSRE | SSCR1_TINTE;
+                drv_data->dma_cr1 = DEFAULT_DMA_CR1;
                 drv_data->clear_sr = SSSR_ROR | SSSR_TINT;
                 drv_data->mask_sr = SSSR_TINT | SSSR_RFS | SSSR_TFS | SSSR_ROR;
         }
@@ -1597,35 +1209,17 @@ static int pxa2xx_spi_probe(struct platform_device *pdev)
         drv_data->tx_channel = -1;
         drv_data->rx_channel = -1;
         if (platform_info->enable_dma) {
-
-                /* Get two DMA channels (rx and tx) */
-                drv_data->rx_channel = pxa_request_dma("pxa2xx_spi_ssp_rx",
-                                                        DMA_PRIO_HIGH,
-                                                        dma_handler,
-                                                        drv_data);
-                if (drv_data->rx_channel < 0) {
-                        dev_err(dev, "problem (%d) requesting rx channel\n",
-                                drv_data->rx_channel);
-                        status = -ENODEV;
-                        goto out_error_irq_alloc;
+                status = pxa2xx_spi_dma_setup(drv_data);
+                if (status) {
+                        dev_warn(dev, "failed to setup DMA, using PIO\n");
+                        platform_info->enable_dma = false;
                 }
-                drv_data->tx_channel = pxa_request_dma("pxa2xx_spi_ssp_tx",
-                                                        DMA_PRIO_MEDIUM,
-                                                        dma_handler,
-                                                        drv_data);
-                if (drv_data->tx_channel < 0) {
-                        dev_err(dev, "problem (%d) requesting tx channel\n",
-                                drv_data->tx_channel);
-                        status = -ENODEV;
-                        goto out_error_dma_alloc;
-                }
-
-                DRCMR(ssp->drcmr_rx) = DRCMR_MAPVLD | drv_data->rx_channel;
-                DRCMR(ssp->drcmr_tx) = DRCMR_MAPVLD | drv_data->tx_channel;
         }
 
         /* Enable SOC clock */
-        clk_enable(ssp->clk);
+        clk_prepare_enable(ssp->clk);
+
+        drv_data->max_clk_rate = clk_get_rate(ssp->clk);
 
         /* Load default SSP configuration */
         write_SSCR0(0, drv_data->ioaddr);
@@ -1640,41 +1234,29 @@ static int pxa2xx_spi_probe(struct platform_device *pdev)
                 write_SSTO(0, drv_data->ioaddr);
         write_SSPSP(0, drv_data->ioaddr);
 
-        /* Initial and start queue */
-        status = init_queue(drv_data);
-        if (status != 0) {
-                dev_err(&pdev->dev, "problem initializing queue\n");
-                goto out_error_clock_enabled;
-        }
-        status = start_queue(drv_data);
-        if (status != 0) {
-                dev_err(&pdev->dev, "problem starting queue\n");
-                goto out_error_clock_enabled;
-        }
+        lpss_ssp_setup(drv_data);
+
+        tasklet_init(&drv_data->pump_transfers, pump_transfers,
+                     (unsigned long)drv_data);
 
         /* Register with the SPI framework */
         platform_set_drvdata(pdev, drv_data);
         status = spi_register_master(master);
         if (status != 0) {
                 dev_err(&pdev->dev, "problem registering spi master\n");
-                goto out_error_queue_alloc;
+                goto out_error_clock_enabled;
         }
 
-        return status;
+        pm_runtime_set_autosuspend_delay(&pdev->dev, 50);
+        pm_runtime_use_autosuspend(&pdev->dev);
+        pm_runtime_set_active(&pdev->dev);
+        pm_runtime_enable(&pdev->dev);
 
-out_error_queue_alloc:
-        destroy_queue(drv_data);
+        return status;
 
 out_error_clock_enabled:
-        clk_disable(ssp->clk);
-
-out_error_dma_alloc:
-        if (drv_data->tx_channel != -1)
-                pxa_free_dma(drv_data->tx_channel);
-        if (drv_data->rx_channel != -1)
-                pxa_free_dma(drv_data->rx_channel);
-
-out_error_irq_alloc:
+        clk_disable_unprepare(ssp->clk);
+        pxa2xx_spi_dma_release(drv_data);
         free_irq(ssp->irq, drv_data);
 
 out_error_master_alloc:
@@ -1687,37 +1269,23 @@ static int pxa2xx_spi_remove(struct platform_device *pdev)
 {
         struct driver_data *drv_data = platform_get_drvdata(pdev);
         struct ssp_device *ssp;
-        int status = 0;
 
         if (!drv_data)
                 return 0;
         ssp = drv_data->ssp;
 
-        /* Remove the queue */
-        status = destroy_queue(drv_data);
-        if (status != 0)
-                /* the kernel does not check the return status of this
-                 * this routine (mod->exit, within the kernel).  Therefore
-                 * nothing is gained by returning from here, the module is
-                 * going away regardless, and we should not leave any more
-                 * resources allocated than necessary.  We cannot free the
-                 * message memory in drv_data->queue, but we can release the
-                 * resources below.  I think the kernel should honor -EBUSY
-                 * returns but... */
-                dev_err(&pdev->dev, "pxa2xx_spi_remove: workqueue will not "
-                        "complete, message memory not freed\n");
+        pm_runtime_get_sync(&pdev->dev);
 
         /* Disable the SSP at the peripheral and SOC level */
         write_SSCR0(0, drv_data->ioaddr);
-        clk_disable(ssp->clk);
+        clk_disable_unprepare(ssp->clk);
 
         /* Release DMA */
-        if (drv_data->master_info->enable_dma) {
-                DRCMR(ssp->drcmr_rx) = 0;
-                DRCMR(ssp->drcmr_tx) = 0;
-                pxa_free_dma(drv_data->tx_channel);
-                pxa_free_dma(drv_data->rx_channel);
-        }
+        if (drv_data->master_info->enable_dma)
+                pxa2xx_spi_dma_release(drv_data);
+
+        pm_runtime_put_noidle(&pdev->dev);
+        pm_runtime_disable(&pdev->dev);
 
         /* Release IRQ */
         free_irq(ssp->irq, drv_data);
@@ -1749,11 +1317,11 @@ static int pxa2xx_spi_suspend(struct device *dev)
         struct ssp_device *ssp = drv_data->ssp;
         int status = 0;
 
-        status = stop_queue(drv_data);
+        status = spi_master_suspend(drv_data->master);
         if (status != 0)
                 return status;
         write_SSCR0(0, drv_data->ioaddr);
-        clk_disable(ssp->clk);
+        clk_disable_unprepare(ssp->clk);
 
         return 0;
 }
@@ -1764,18 +1332,13 @@ static int pxa2xx_spi_resume(struct device *dev)
         struct ssp_device *ssp = drv_data->ssp;
         int status = 0;
 
-        if (drv_data->rx_channel != -1)
-                DRCMR(drv_data->ssp->drcmr_rx) =
-                        DRCMR_MAPVLD | drv_data->rx_channel;
-        if (drv_data->tx_channel != -1)
-                DRCMR(drv_data->ssp->drcmr_tx) =
-                        DRCMR_MAPVLD | drv_data->tx_channel;
+        pxa2xx_spi_dma_resume(drv_data);
 
         /* Enable the SSP clock */
-        clk_enable(ssp->clk);
+        clk_prepare_enable(ssp->clk);
 
         /* Start the queue running */
-        status = start_queue(drv_data);
+        status = spi_master_resume(drv_data->master);
         if (status != 0) {
                 dev_err(dev, "problem starting queue (%d)\n", status);
                 return status;
@@ -1783,20 +1346,38 @@ static int pxa2xx_spi_resume(struct device *dev)
 
         return 0;
 }
+#endif
+
+#ifdef CONFIG_PM_RUNTIME
+static int pxa2xx_spi_runtime_suspend(struct device *dev)
+{
+        struct driver_data *drv_data = dev_get_drvdata(dev);
+
+        clk_disable_unprepare(drv_data->ssp->clk);
+        return 0;
+}
+
+static int pxa2xx_spi_runtime_resume(struct device *dev)
+{
+        struct driver_data *drv_data = dev_get_drvdata(dev);
+
+        clk_prepare_enable(drv_data->ssp->clk);
+        return 0;
+}
+#endif
 
 static const struct dev_pm_ops pxa2xx_spi_pm_ops = {
-        .suspend        = pxa2xx_spi_suspend,
-        .resume         = pxa2xx_spi_resume,
+        SET_SYSTEM_SLEEP_PM_OPS(pxa2xx_spi_suspend, pxa2xx_spi_resume)
+        SET_RUNTIME_PM_OPS(pxa2xx_spi_runtime_suspend,
+                           pxa2xx_spi_runtime_resume, NULL)
 };
-#endif
 
 static struct platform_driver driver = {
         .driver = {
                 .name   = "pxa2xx-spi",
                 .owner  = THIS_MODULE,
-#ifdef CONFIG_PM
                 .pm     = &pxa2xx_spi_pm_ops,
-#endif
+                .acpi_match_table = ACPI_PTR(pxa2xx_spi_acpi_match),
         },
         .probe = pxa2xx_spi_probe,
         .remove = pxa2xx_spi_remove,
diff --git a/drivers/spi/spi-pxa2xx.h b/drivers/spi/spi-pxa2xx.h
new file mode 100644
index 000000000000..5adc2a11c7bc
--- /dev/null
+++ b/drivers/spi/spi-pxa2xx.h
@@ -0,0 +1,221 @@
+/*
+ * Copyright (C) 2005 Stephen Street / StreetFire Sound Labs
+ * Copyright (C) 2013, Intel Corporation
+ *
+ * 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.
+ */
+
+#ifndef SPI_PXA2XX_H
+#define SPI_PXA2XX_H
+
+#include <linux/atomic.h>
+#include <linux/dmaengine.h>
+#include <linux/errno.h>
+#include <linux/io.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/pxa2xx_ssp.h>
+#include <linux/scatterlist.h>
+#include <linux/sizes.h>
+#include <linux/spi/spi.h>
+#include <linux/spi/pxa2xx_spi.h>
+
+struct driver_data {
+        /* Driver model hookup */
+        struct platform_device *pdev;
+
+        /* SSP Info */
+        struct ssp_device *ssp;
+
+        /* SPI framework hookup */
+        enum pxa_ssp_type ssp_type;
+        struct spi_master *master;
+
+        /* PXA hookup */
+        struct pxa2xx_spi_master *master_info;
+
+        /* PXA private DMA setup stuff */
+        int rx_channel;
+        int tx_channel;
+        u32 *null_dma_buf;
+
+        /* SSP register addresses */
+        void __iomem *ioaddr;
+        u32 ssdr_physical;
+
+        /* SSP masks*/
+        u32 dma_cr1;
+        u32 int_cr1;
+        u32 clear_sr;
+        u32 mask_sr;
+
+        /* Maximun clock rate */
+        unsigned long max_clk_rate;
+
+        /* Message Transfer pump */
+        struct tasklet_struct pump_transfers;
+
+        /* DMA engine support */
+        struct dma_chan *rx_chan;
+        struct dma_chan *tx_chan;
+        struct sg_table rx_sgt;
+        struct sg_table tx_sgt;
+        int rx_nents;
+        int tx_nents;
+        void *dummy;
+        atomic_t dma_running;
+
+        /* Current message transfer state info */
+        struct spi_message *cur_msg;
+        struct spi_transfer *cur_transfer;
+        struct chip_data *cur_chip;
+        size_t len;
+        void *tx;
+        void *tx_end;
+        void *rx;
+        void *rx_end;
+        int dma_mapped;
+        dma_addr_t rx_dma;
+        dma_addr_t tx_dma;
+        size_t rx_map_len;
+        size_t tx_map_len;
+        u8 n_bytes;
+        int (*write)(struct driver_data *drv_data);
+        int (*read)(struct driver_data *drv_data);
+        irqreturn_t (*transfer_handler)(struct driver_data *drv_data);
+        void (*cs_control)(u32 command);
+
+        void __iomem *lpss_base;
+};
+
+struct chip_data {
+        u32 cr0;
+        u32 cr1;
+        u32 psp;
+        u32 timeout;
+        u8 n_bytes;
+        u32 dma_burst_size;
+        u32 threshold;
+        u32 dma_threshold;
+        u16 lpss_rx_threshold;
+        u16 lpss_tx_threshold;
+        u8 enable_dma;
+        u8 bits_per_word;
+        u32 speed_hz;
+        union {
+                int gpio_cs;
+                unsigned int frm;
+        };
+        int gpio_cs_inverted;
+        int (*write)(struct driver_data *drv_data);
+        int (*read)(struct driver_data *drv_data);
+        void (*cs_control)(u32 command);
+};
+
+#define DEFINE_SSP_REG(reg, off) \
+static inline u32 read_##reg(void const __iomem *p) \
+{ return __raw_readl(p + (off)); } \
+\
+static inline void write_##reg(u32 v, void __iomem *p) \
+{ __raw_writel(v, p + (off)); }
+
+DEFINE_SSP_REG(SSCR0, 0x00)
+DEFINE_SSP_REG(SSCR1, 0x04)
+DEFINE_SSP_REG(SSSR, 0x08)
+DEFINE_SSP_REG(SSITR, 0x0c)
+DEFINE_SSP_REG(SSDR, 0x10)
+DEFINE_SSP_REG(SSTO, 0x28)
+DEFINE_SSP_REG(SSPSP, 0x2c)
+DEFINE_SSP_REG(SSITF, SSITF)
+DEFINE_SSP_REG(SSIRF, SSIRF)
+
+#define START_STATE ((void *)0)
+#define RUNNING_STATE ((void *)1)
+#define DONE_STATE ((void *)2)
+#define ERROR_STATE ((void *)-1)
+
+#define IS_DMA_ALIGNED(x)       IS_ALIGNED((unsigned long)(x), DMA_ALIGNMENT)
+#define DMA_ALIGNMENT           8
+
+static inline int pxa25x_ssp_comp(struct driver_data *drv_data)
+{
+        if (drv_data->ssp_type == PXA25x_SSP)
+                return 1;
+        if (drv_data->ssp_type == CE4100_SSP)
+                return 1;
+        return 0;
+}
+
+static inline void write_SSSR_CS(struct driver_data *drv_data, u32 val)
+{
+        void __iomem *reg = drv_data->ioaddr;
+
+        if (drv_data->ssp_type == CE4100_SSP)
+                val |= read_SSSR(reg) & SSSR_ALT_FRM_MASK;
+
+        write_SSSR(val, reg);
+}
+
+extern int pxa2xx_spi_flush(struct driver_data *drv_data);
+extern void *pxa2xx_spi_next_transfer(struct driver_data *drv_data);
+
+/*
+ * Select the right DMA implementation.
+ */
+#if defined(CONFIG_SPI_PXA2XX_PXADMA)
+#define SPI_PXA2XX_USE_DMA      1
+#define MAX_DMA_LEN             8191
+#define DEFAULT_DMA_CR1         (SSCR1_TSRE | SSCR1_RSRE | SSCR1_TINTE)
+#elif defined(CONFIG_SPI_PXA2XX_DMA)
+#define SPI_PXA2XX_USE_DMA      1
+#define MAX_DMA_LEN             SZ_64K
+#define DEFAULT_DMA_CR1         (SSCR1_TSRE | SSCR1_RSRE | SSCR1_TRAIL)
+#else
+#undef SPI_PXA2XX_USE_DMA
+#define MAX_DMA_LEN             0
+#define DEFAULT_DMA_CR1         0
+#endif
+
+#ifdef SPI_PXA2XX_USE_DMA
+extern bool pxa2xx_spi_dma_is_possible(size_t len);
+extern int pxa2xx_spi_map_dma_buffers(struct driver_data *drv_data);
+extern irqreturn_t pxa2xx_spi_dma_transfer(struct driver_data *drv_data);
+extern int pxa2xx_spi_dma_prepare(struct driver_data *drv_data, u32 dma_burst);
+extern void pxa2xx_spi_dma_start(struct driver_data *drv_data);
+extern int pxa2xx_spi_dma_setup(struct driver_data *drv_data);
+extern void pxa2xx_spi_dma_release(struct driver_data *drv_data);
+extern void pxa2xx_spi_dma_resume(struct driver_data *drv_data);
+extern int pxa2xx_spi_set_dma_burst_and_threshold(struct chip_data *chip,
+                                                  struct spi_device *spi,
+                                                  u8 bits_per_word,
+                                                  u32 *burst_code,
+                                                  u32 *threshold);
+#else
+static inline bool pxa2xx_spi_dma_is_possible(size_t len) { return false; }
+static inline int pxa2xx_spi_map_dma_buffers(struct driver_data *drv_data)
+{
+        return 0;
+}
+#define pxa2xx_spi_dma_transfer NULL
+static inline void pxa2xx_spi_dma_prepare(struct driver_data *drv_data,
+                                          u32 dma_burst) {}
+static inline void pxa2xx_spi_dma_start(struct driver_data *drv_data) {}
+static inline int pxa2xx_spi_dma_setup(struct driver_data *drv_data)
+{
+        return 0;
+}
+static inline void pxa2xx_spi_dma_release(struct driver_data *drv_data) {}
+static inline void pxa2xx_spi_dma_resume(struct driver_data *drv_data) {}
+static inline int pxa2xx_spi_set_dma_burst_and_threshold(struct chip_data *chip,
+                                                         struct spi_device *spi,
+                                                         u8 bits_per_word,
+                                                         u32 *burst_code,
+                                                         u32 *threshold)
+{
+        return -ENODEV;
+}
+#endif
+
+#endif /* SPI_PXA2XX_H */
diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c
index 51a8c4216ebb..7cfbe9d3381f 100644
--- a/drivers/spi/spi-s3c64xx.c
+++ b/drivers/spi/spi-s3c64xx.c
@@ -62,7 +62,7 @@
 #define S3C64XX_SPI_CLKSEL_SRCMSK       (3<<9)
 #define S3C64XX_SPI_CLKSEL_SRCSHFT      9
 #define S3C64XX_SPI_ENCLK_ENABLE        (1<<8)
-#define S3C64XX_SPI_PSR_MASK            0xff
+#define S3C64XX_SPI_PSR_MASK            0xff
 
 #define S3C64XX_SPI_MODE_CH_TSZ_BYTE            (0<<29)
 #define S3C64XX_SPI_MODE_CH_TSZ_HALFWORD        (1<<29)
@@ -695,7 +695,7 @@ static int s3c64xx_spi_transfer_one_message(struct spi_master *master,
                 INIT_COMPLETION(sdd->xfer_completion);
 
                 /* Only BPW and Speed may change across transfers */
-                bpw = xfer->bits_per_word ? : spi->bits_per_word;
+                bpw = xfer->bits_per_word;
                 speed = xfer->speed_hz ? : spi->max_speed_hz;
 
                 if (xfer->len % (bpw / 8)) {
@@ -741,8 +741,7 @@ static int s3c64xx_spi_transfer_one_message(struct spi_master *master,
                        sdd->regs + S3C64XX_SPI_SLAVE_SEL);
 
                 if (status) {
-                        dev_err(&spi->dev, "I/O Error: "
-                                "rx-%d tx-%d res:rx-%c tx-%c len-%d\n",
+                        dev_err(&spi->dev, "I/O Error: rx-%d tx-%d res:rx-%c tx-%c len-%d\n",
                                 xfer->rx_buf ? 1 : 0, xfer->tx_buf ? 1 : 0,
                                 (sdd->state & RXBUSY) ? 'f' : 'p',
                                 (sdd->state & TXBUSY) ? 'f' : 'p',
@@ -797,7 +796,7 @@ static int s3c64xx_spi_prepare_transfer(struct spi_master *spi)
 
         /* Acquire DMA channels */
         while (!acquire_dma(sdd))
-                msleep(10);
+                usleep_range(10000, 11000);
 
         pm_runtime_get_sync(&sdd->pdev->dev);
 
@@ -839,16 +838,14 @@ static struct s3c64xx_spi_csinfo *s3c64xx_get_slave_ctrldata(
 
         cs = kzalloc(sizeof(*cs), GFP_KERNEL);
         if (!cs) {
-                dev_err(&spi->dev, "could not allocate memory for controller"
-                                        " data\n");
+                dev_err(&spi->dev, "could not allocate memory for controller data\n");
                 of_node_put(data_np);
                 return ERR_PTR(-ENOMEM);
         }
 
         cs->line = of_get_named_gpio(data_np, "cs-gpio", 0);
         if (!gpio_is_valid(cs->line)) {
-                dev_err(&spi->dev, "chip select gpio is not specified or "
-                                        "invalid\n");
+                dev_err(&spi->dev, "chip select gpio is not specified or invalid\n");
                 kfree(cs);
                 of_node_put(data_np);
                 return ERR_PTR(-EINVAL);
@@ -955,6 +952,8 @@ static int s3c64xx_spi_setup(struct spi_device *spi)
                 if (spi->max_speed_hz >= speed) {
                         spi->max_speed_hz = speed;
                 } else {
+                        dev_err(&spi->dev, "Can't set %dHz transfer speed\n",
+                                spi->max_speed_hz);
                         err = -EINVAL;
                         goto setup_exit;
                 }
@@ -1088,8 +1087,7 @@ static void s3c64xx_spi_dt_gpio_free(struct s3c64xx_spi_driver_data *sdd)
                 gpio_free(sdd->gpios[idx]);
 }
 
-static struct s3c64xx_spi_info * s3c64xx_spi_parse_dt(
-                                                struct device *dev)
+static struct s3c64xx_spi_info *s3c64xx_spi_parse_dt(struct device *dev)
 {
         struct s3c64xx_spi_info *sci;
         u32 temp;
@@ -1101,16 +1099,14 @@ static struct s3c64xx_spi_info * s3c64xx_spi_parse_dt(
         }
 
         if (of_property_read_u32(dev->of_node, "samsung,spi-src-clk", &temp)) {
-                dev_warn(dev, "spi bus clock parent not specified, using "
-                                "clock at index 0 as parent\n");
+                dev_warn(dev, "spi bus clock parent not specified, using clock at index 0 as parent\n");
                 sci->src_clk_nr = 0;
         } else {
                 sci->src_clk_nr = temp;
         }
 
         if (of_property_read_u32(dev->of_node, "num-cs", &temp)) {
-                dev_warn(dev, "number of chip select lines not specified, "
-                                "assuming 1 chip select line\n");
+                dev_warn(dev, "number of chip select lines not specified, assuming 1 chip select line\n");
                 sci->num_cs = 1;
         } else {
                 sci->num_cs = temp;
@@ -1150,7 +1146,7 @@ static inline struct s3c64xx_spi_port_config *s3c64xx_spi_get_port_config(
                          platform_get_device_id(pdev)->driver_data;
 }
 
-static int __init s3c64xx_spi_probe(struct platform_device *pdev)
+static int s3c64xx_spi_probe(struct platform_device *pdev)
 {
         struct resource *mem_res;
         struct resource *res;
@@ -1201,8 +1197,8 @@ static int __init s3c64xx_spi_probe(struct platform_device *pdev)
         if (pdev->dev.of_node) {
                 ret = of_alias_get_id(pdev->dev.of_node, "spi");
                 if (ret < 0) {
-                        dev_err(&pdev->dev, "failed to get alias id, "
-                                                "errno %d\n", ret);
+                        dev_err(&pdev->dev, "failed to get alias id, errno %d\n",
+                                ret);
                         goto err0;
                 }
                 sdd->port_id = ret;
@@ -1249,7 +1245,7 @@ static int __init s3c64xx_spi_probe(struct platform_device *pdev)
         if (sdd->regs == NULL) {
                 dev_err(&pdev->dev, "Unable to remap IO\n");
                 ret = -ENXIO;
-                goto err1;
+                goto err0;
         }
 
         if (!sci->cfg_gpio && pdev->dev.of_node) {
@@ -1258,36 +1254,36 @@ static int __init s3c64xx_spi_probe(struct platform_device *pdev)
         } else if (sci->cfg_gpio == NULL || sci->cfg_gpio()) {
                 dev_err(&pdev->dev, "Unable to config gpio\n");
                 ret = -EBUSY;
-                goto err2;
+                goto err0;
         }
 
         /* Setup clocks */
-        sdd->clk = clk_get(&pdev->dev, "spi");
+        sdd->clk = devm_clk_get(&pdev->dev, "spi");
         if (IS_ERR(sdd->clk)) {
                 dev_err(&pdev->dev, "Unable to acquire clock 'spi'\n");
                 ret = PTR_ERR(sdd->clk);
-                goto err3;
+                goto err1;
         }
 
         if (clk_prepare_enable(sdd->clk)) {
                 dev_err(&pdev->dev, "Couldn't enable clock 'spi'\n");
                 ret = -EBUSY;
-                goto err4;
+                goto err1;
         }
 
         sprintf(clk_name, "spi_busclk%d", sci->src_clk_nr);
-        sdd->src_clk = clk_get(&pdev->dev, clk_name);
+        sdd->src_clk = devm_clk_get(&pdev->dev, clk_name);
         if (IS_ERR(sdd->src_clk)) {
                 dev_err(&pdev->dev,
                         "Unable to acquire clock '%s'\n", clk_name);
                 ret = PTR_ERR(sdd->src_clk);
-                goto err5;
+                goto err2;
         }
 
         if (clk_prepare_enable(sdd->src_clk)) {
                 dev_err(&pdev->dev, "Couldn't enable clock '%s'\n", clk_name);
                 ret = -EBUSY;
-                goto err6;
+                goto err2;
         }
 
         /* Setup Deufult Mode */
@@ -1297,11 +1293,12 @@ static int __init s3c64xx_spi_probe(struct platform_device *pdev)
         init_completion(&sdd->xfer_completion);
         INIT_LIST_HEAD(&sdd->queue);
 
-        ret = request_irq(irq, s3c64xx_spi_irq, 0, "spi-s3c64xx", sdd);
+        ret = devm_request_irq(&pdev->dev, irq, s3c64xx_spi_irq, 0,
+                                "spi-s3c64xx", sdd);
         if (ret != 0) {
                 dev_err(&pdev->dev, "Failed to request IRQ %d: %d\n",
                         irq, ret);
-                goto err7;
+                goto err3;
         }
 
         writel(S3C64XX_SPI_INT_RX_OVERRUN_EN | S3C64XX_SPI_INT_RX_UNDERRUN_EN |
@@ -1311,11 +1308,10 @@ static int __init s3c64xx_spi_probe(struct platform_device *pdev)
         if (spi_register_master(master)) {
                 dev_err(&pdev->dev, "cannot register SPI master\n");
                 ret = -EBUSY;
-                goto err8;
+                goto err3;
         }
 
-        dev_dbg(&pdev->dev, "Samsung SoC SPI Driver loaded for Bus SPI-%d "
-                                        "with %d Slaves attached\n",
+        dev_dbg(&pdev->dev, "Samsung SoC SPI Driver loaded for Bus SPI-%d with %d Slaves attached\n",
                                         sdd->port_id, master->num_chipselect);
         dev_dbg(&pdev->dev, "\tIOmem=[0x%x-0x%x]\tDMA=[Rx-%d, Tx-%d]\n",
                                         mem_res->end, mem_res->start,
@@ -1325,21 +1321,13 @@ static int __init s3c64xx_spi_probe(struct platform_device *pdev)
 
         return 0;
 
-err8:
-        free_irq(irq, sdd);
-err7:
+err3:
         clk_disable_unprepare(sdd->src_clk);
-err6:
-        clk_put(sdd->src_clk);
-err5:
+err2:
         clk_disable_unprepare(sdd->clk);
-err4:
-        clk_put(sdd->clk);
-err3:
+err1:
         if (!sdd->cntrlr_info->cfg_gpio && pdev->dev.of_node)
                 s3c64xx_spi_dt_gpio_free(sdd);
-err2:
-err1:
 err0:
         platform_set_drvdata(pdev, NULL);
         spi_master_put(master);
@@ -1358,13 +1346,9 @@ static int s3c64xx_spi_remove(struct platform_device *pdev)
 
         writel(0, sdd->regs + S3C64XX_SPI_INT_EN);
 
-        free_irq(platform_get_irq(pdev, 0), sdd);
-
         clk_disable_unprepare(sdd->src_clk);
-        clk_put(sdd->src_clk);
 
         clk_disable_unprepare(sdd->clk);
-        clk_put(sdd->clk);
 
         if (!sdd->cntrlr_info->cfg_gpio && pdev->dev.of_node)
                 s3c64xx_spi_dt_gpio_free(sdd);
diff --git a/drivers/spi/spi-sh-msiof.c b/drivers/spi/spi-sh-msiof.c
index 96358d0eabb7..8b40d0884f8b 100644
--- a/drivers/spi/spi-sh-msiof.c
+++ b/drivers/spi/spi-sh-msiof.c
@@ -20,6 +20,7 @@
 #include <linux/io.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
+#include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 
@@ -592,6 +593,37 @@ static u32 sh_msiof_spi_txrx_word(struct spi_device *spi, unsigned nsecs,
         return 0;
 }
 
+#ifdef CONFIG_OF
+static struct sh_msiof_spi_info *sh_msiof_spi_parse_dt(struct device *dev)
+{
+        struct sh_msiof_spi_info *info;
+        struct device_node *np = dev->of_node;
+        u32 num_cs = 0;
+
+        info = devm_kzalloc(dev, sizeof(struct sh_msiof_spi_info), GFP_KERNEL);
+        if (!info) {
+                dev_err(dev, "failed to allocate setup data\n");
+                return NULL;
+        }
+
+        /* Parse the MSIOF properties */
+        of_property_read_u32(np, "num-cs", &num_cs);
+        of_property_read_u32(np, "renesas,tx-fifo-size",
+                                        &info->tx_fifo_override);
+        of_property_read_u32(np, "renesas,rx-fifo-size",
+                                        &info->rx_fifo_override);
+
+        info->num_chipselect = num_cs;
+
+        return info;
+}
+#else
+static struct sh_msiof_spi_info *sh_msiof_spi_parse_dt(struct device *dev)
+{
+        return NULL;
+}
+#endif
+
 static int sh_msiof_spi_probe(struct platform_device *pdev)
 {
         struct resource *r;
@@ -610,7 +642,17 @@ static int sh_msiof_spi_probe(struct platform_device *pdev)
         p = spi_master_get_devdata(master);
 
         platform_set_drvdata(pdev, p);
-        p->info = pdev->dev.platform_data;
+        if (pdev->dev.of_node)
+                p->info = sh_msiof_spi_parse_dt(&pdev->dev);
+        else
+                p->info = pdev->dev.platform_data;
+
+        if (!p->info) {
+                dev_err(&pdev->dev, "failed to obtain device info\n");
+                ret = -ENXIO;
+                goto err1;
+        }
+
         init_completion(&p->done);
 
         p->clk = clk_get(&pdev->dev, NULL);
@@ -715,6 +757,17 @@ static int sh_msiof_spi_runtime_nop(struct device *dev)
         return 0;
 }
 
+#ifdef CONFIG_OF
+static const struct of_device_id sh_msiof_match[] = {
+        { .compatible = "renesas,sh-msiof", },
+        { .compatible = "renesas,sh-mobile-msiof", },
+        {},
+};
+MODULE_DEVICE_TABLE(of, sh_msiof_match);
+#else
+#define sh_msiof_match NULL
+#endif
+
 static struct dev_pm_ops sh_msiof_spi_dev_pm_ops = {
         .runtime_suspend = sh_msiof_spi_runtime_nop,
         .runtime_resume = sh_msiof_spi_runtime_nop,
@@ -727,6 +780,7 @@ static struct platform_driver sh_msiof_spi_drv = {
                 .name           = "spi_sh_msiof",
                 .owner          = THIS_MODULE,
                 .pm             = &sh_msiof_spi_dev_pm_ops,
+                .of_match_table = sh_msiof_match,
         },
 };
 module_platform_driver(sh_msiof_spi_drv);
diff --git a/drivers/spi/spi-sirf.c b/drivers/spi/spi-sirf.c
index e0f43a512e84..6a5626d146b7 100644
--- a/drivers/spi/spi-sirf.c
+++ b/drivers/spi/spi-sirf.c
@@ -382,8 +382,7 @@ spi_sirfsoc_setup_transfer(struct spi_device *spi, struct spi_transfer *t)
 
         sspi = spi_master_get_devdata(spi->master);
 
-        bits_per_word = t && t->bits_per_word ? t->bits_per_word :
-                spi->bits_per_word;
+        bits_per_word = (t) ? t->bits_per_word : spi->bits_per_word;
         hz = t && t->speed_hz ? t->speed_hz : spi->max_speed_hz;
 
         /* Enable IO mode for RX, TX */
@@ -570,7 +569,7 @@ static int spi_sirfsoc_probe(struct platform_device *pdev)
                 ret = -EINVAL;
                 goto free_pin;
         }
-        clk_enable(sspi->clk);
+        clk_prepare_enable(sspi->clk);
         sspi->ctrl_freq = clk_get_rate(sspi->clk);
 
         init_completion(&sspi->done);
@@ -594,7 +593,7 @@ static int spi_sirfsoc_probe(struct platform_device *pdev)
         return 0;
 
 free_clk:
-        clk_disable(sspi->clk);
+        clk_disable_unprepare(sspi->clk);
         clk_put(sspi->clk);
 free_pin:
         pinctrl_put(sspi->p);
@@ -618,7 +617,7 @@ static int  spi_sirfsoc_remove(struct platform_device *pdev)
                 if (sspi->chipselect[i] > 0)
                         gpio_free(sspi->chipselect[i]);
         }
-        clk_disable(sspi->clk);
+        clk_disable_unprepare(sspi->clk);
         clk_put(sspi->clk);
         pinctrl_put(sspi->p);
         spi_master_put(master);
@@ -659,6 +658,7 @@ static const struct dev_pm_ops spi_sirfsoc_pm_ops = {
 
 static const struct of_device_id spi_sirfsoc_of_match[] = {
         { .compatible = "sirf,prima2-spi", },
+        { .compatible = "sirf,marco-spi", },
         {}
 };
 MODULE_DEVICE_TABLE(of, sirfsoc_spi_of_match);
diff --git a/drivers/spi/spi-tegra20-sflash.c b/drivers/spi/spi-tegra20-sflash.c
index 448a8cc71df3..9a42c158e245 100644
--- a/drivers/spi/spi-tegra20-sflash.c
+++ b/drivers/spi/spi-tegra20-sflash.c
@@ -269,9 +269,7 @@ static int tegra_sflash_start_transfer_one(struct spi_device *spi,
         u32 speed;
         unsigned long command;
 
-        speed = t->speed_hz ? t->speed_hz : spi->max_speed_hz;
-        if (!speed)
-                speed = tsd->spi_max_frequency;
+        speed = t->speed_hz;
         if (speed != tsd->cur_speed) {
                 clk_set_rate(tsd->clk, speed);
                 tsd->cur_speed = speed;
@@ -319,6 +317,15 @@ static int tegra_sflash_start_transfer_one(struct spi_device *spi,
         return  tegra_sflash_start_cpu_based_transfer(tsd, t);
 }
 
+static int tegra_sflash_setup(struct spi_device *spi)
+{
+        struct tegra_sflash_data *tsd = spi_master_get_devdata(spi->master);
+
+        /* Set speed to the spi max fequency if spi device has not set */
+        spi->max_speed_hz = spi->max_speed_hz ? : tsd->spi_max_frequency;
+        return 0;
+}
+
 static int tegra_sflash_transfer_one_message(struct spi_master *master,
                         struct spi_message *msg)
 {
@@ -492,6 +499,7 @@ static int tegra_sflash_probe(struct platform_device *pdev)
 
         /* the spi->mode bits understood by this driver: */
         master->mode_bits = SPI_CPOL | SPI_CPHA;
+        master->setup = tegra_sflash_setup;
         master->transfer_one_message = tegra_sflash_transfer_one_message;
         master->num_chipselect = MAX_CHIP_SELECT;
         master->bus_num = -1;
diff --git a/drivers/spi/spi-tegra20-slink.c b/drivers/spi/spi-tegra20-slink.c
index 651167f2e0af..8d51db8dea6d 100644
--- a/drivers/spi/spi-tegra20-slink.c
+++ b/drivers/spi/spi-tegra20-slink.c
@@ -284,8 +284,7 @@ static unsigned tegra_slink_calculate_curr_xfer_param(
         unsigned max_len;
         unsigned total_fifo_words;
 
-        bits_per_word = t->bits_per_word ? t->bits_per_word :
-                                                spi->bits_per_word;
+        bits_per_word = t->bits_per_word;
         tspi->bytes_per_word = (bits_per_word - 1) / 8 + 1;
 
         if (bits_per_word == 8 || bits_per_word == 16) {
@@ -378,8 +377,7 @@ static unsigned int tegra_slink_read_rx_fifo_to_client_rxbuf(
         } else {
                 unsigned int bits_per_word;
 
-                bits_per_word = t->bits_per_word ? t->bits_per_word :
-                                                tspi->cur_spi->bits_per_word;
+                bits_per_word = t->bits_per_word;
                 for (count = 0; count < rx_full_count; count++) {
                         x = tegra_slink_readl(tspi, SLINK_RX_FIFO);
                         for (i = 0; (i < tspi->bytes_per_word); i++)
@@ -444,8 +442,7 @@ static void tegra_slink_copy_spi_rxbuf_to_client_rxbuf(
                 unsigned int x;
                 unsigned int rx_mask, bits_per_word;
 
-                bits_per_word = t->bits_per_word ? t->bits_per_word :
-                                                tspi->cur_spi->bits_per_word;
+                bits_per_word = t->bits_per_word;
                 rx_mask = (1 << bits_per_word) - 1;
                 for (count = 0; count < tspi->curr_dma_words; count++) {
                         x = tspi->rx_dma_buf[count];
@@ -728,9 +725,7 @@ static int tegra_slink_start_transfer_one(struct spi_device *spi,
         unsigned long command2;
 
         bits_per_word = t->bits_per_word;
-        speed = t->speed_hz ? t->speed_hz : spi->max_speed_hz;
-        if (!speed)
-                speed = tspi->spi_max_frequency;
+        speed = t->speed_hz;
         if (speed != tspi->cur_speed) {
                 clk_set_rate(tspi->clk, speed * 4);
                 tspi->cur_speed = speed;
@@ -841,6 +836,8 @@ static int tegra_slink_setup(struct spi_device *spi)
 
         BUG_ON(spi->chip_select >= MAX_CHIP_SELECT);
 
+        /* Set speed to the spi max fequency if spi device has not set */
+        spi->max_speed_hz = spi->max_speed_hz ? : tspi->spi_max_frequency;
         ret = pm_runtime_get_sync(tspi->dev);
         if (ret < 0) {
                 dev_err(tspi->dev, "pm runtime failed, e = %d\n", ret);
diff --git a/drivers/spi/spi-txx9.c b/drivers/spi/spi-txx9.c
index d5a3cbb646cb..adb853047926 100644
--- a/drivers/spi/spi-txx9.c
+++ b/drivers/spi/spi-txx9.c
@@ -189,9 +189,8 @@ static void txx9spi_work_one(struct txx9spi *c, struct spi_message *m)
                 unsigned int len = t->len;
                 unsigned int wsize;
                 u32 speed_hz = t->speed_hz ? : spi->max_speed_hz;
-                u8 bits_per_word = t->bits_per_word ? : spi->bits_per_word;
+                u8 bits_per_word = t->bits_per_word;
 
-                bits_per_word = bits_per_word ? : 8;
                 wsize = bits_per_word >> 3; /* in bytes */
 
                 if (prev_speed_hz != speed_hz
@@ -316,9 +315,8 @@ static int txx9spi_transfer(struct spi_device *spi, struct spi_message *m)
         /* check each transfer's parameters */
         list_for_each_entry (t, &m->transfers, transfer_list) {
                 u32 speed_hz = t->speed_hz ? : spi->max_speed_hz;
-                u8 bits_per_word = t->bits_per_word ? : spi->bits_per_word;
+                u8 bits_per_word = t->bits_per_word;
 
-                bits_per_word = bits_per_word ? : 8;
                 if (!t->tx_buf && !t->rx_buf && t->len)
                         return -EINVAL;
                 if (bits_per_word != 8 && bits_per_word != 16)
@@ -337,7 +335,7 @@ static int txx9spi_transfer(struct spi_device *spi, struct spi_message *m)
         return 0;
 }
 
-static int __init txx9spi_probe(struct platform_device *dev)
+static int txx9spi_probe(struct platform_device *dev)
 {
         struct spi_master *master;
         struct txx9spi *c;
@@ -432,7 +430,7 @@ exit:
         return ret;
 }
 
-static int __exit txx9spi_remove(struct platform_device *dev)
+static int txx9spi_remove(struct platform_device *dev)
 {
         struct spi_master *master = spi_master_get(platform_get_drvdata(dev));
         struct txx9spi *c = spi_master_get_devdata(master);
@@ -450,7 +448,7 @@ static int __exit txx9spi_remove(struct platform_device *dev)
 MODULE_ALIAS("platform:spi_txx9");
 
 static struct platform_driver txx9spi_driver = {
-        .remove = __exit_p(txx9spi_remove),
+        .remove = txx9spi_remove,
         .driver = {
                 .name = "spi_txx9",
                 .owner = THIS_MODULE,
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 19ee901577da..6f193b02a9e8 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -33,7 +33,7 @@
 #include <linux/of_gpio.h>
 #include <linux/pm_runtime.h>
 #include <linux/export.h>
-#include <linux/sched.h>
+#include <linux/sched/rt.h>
 #include <linux/delay.h>
 #include <linux/kthread.h>
 #include <linux/ioport.h>
@@ -1059,15 +1059,14 @@ EXPORT_SYMBOL_GPL(spi_alloc_master);
 #ifdef CONFIG_OF
 static int of_spi_register_master(struct spi_master *master)
 {
-        u16 nb;
-        int i, *cs;
+        int nb, i, *cs;
         struct device_node *np = master->dev.of_node;
 
         if (!np)
                 return 0;
 
         nb = of_gpio_named_count(np, "cs-gpios");
-        master->num_chipselect = max(nb, master->num_chipselect);
+        master->num_chipselect = max(nb, (int)master->num_chipselect);
 
         if (nb < 1)
                 return 0;
@@ -1080,7 +1079,8 @@ static int of_spi_register_master(struct spi_master *master)
         if (!master->cs_gpios)
                 return -ENOMEM;
 
-        memset(cs, -EINVAL, master->num_chipselect);
+        for (i = 0; i < master->num_chipselect; i++)
+                cs[i] = -EINVAL;
 
         for (i = 0; i < nb; i++)
                 cs[i] = of_get_named_gpio(np, "cs-gpios", i);
@@ -1135,6 +1135,9 @@ int spi_register_master(struct spi_master *master)
         if (master->num_chipselect == 0)
                 return -EINVAL;
 
+        if ((master->bus_num < 0) && master->dev.of_node)
+                master->bus_num = of_alias_get_id(master->dev.of_node, "spi");
+
         /* convention:  dynamically assigned bus IDs count down from the max */
         if (master->bus_num < 0) {
                 /* FIXME switch to an IDR based scheme, something like
@@ -1366,12 +1369,14 @@ static int __spi_async(struct spi_device *spi, struct spi_message *message)
         }
 
         /**
-         * Set transfer bits_per_word as spi device default if it is not
-         * set for this transfer.
+         * Set transfer bits_per_word and max speed as spi device default if
+         * it is not set for this transfer.
          */
         list_for_each_entry(xfer, &message->transfers, transfer_list) {
                 if (!xfer->bits_per_word)
                         xfer->bits_per_word = spi->bits_per_word;
+                if (!xfer->speed_hz)
+                        xfer->speed_hz = spi->max_speed_hz;
         }
 
         message->spi = spi;
@@ -1656,7 +1661,8 @@ int spi_write_then_read(struct spi_device *spi,
          * using the pre-allocated buffer or the transfer is too large.
          */
         if ((n_tx + n_rx) > SPI_BUFSIZ || !mutex_trylock(&lock)) {
-                local_buf = kmalloc(max((unsigned)SPI_BUFSIZ, n_tx + n_rx), GFP_KERNEL);
+                local_buf = kmalloc(max((unsigned)SPI_BUFSIZ, n_tx + n_rx),
+                                    GFP_KERNEL | GFP_DMA);
                 if (!local_buf)
                         return -ENOMEM;
         } else {