Merge tag 'spi-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi

Pull SPI updates from Mark Brown:
 "A quiet release for SPI, some fixes and small updates for individual
  drivers with one bigger change from Linus Walleij which coverts the
  bitbanging SPI driver to use the GPIO descriptor API from Linus
  Walleij.

  Since GPIO descriptors were used by platform data this means there's a
  few changes in arch/ making relevant updates for a few platforms and
  one misc driver that are affected"

* tag 'spi-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (24 commits)
  MAINTAINERS: update Andi's e-mail
  spi: spi-atmel: Use correct enum for DMA transfer direction
  spi: sh-msiof: Document R-Car M3-N support
  spi: sh-msiof: Use correct enum for DMA transfer direction
  spi: sprd: Add the support of restarting the system
  spi: sprd: Simplify the transfer function
  spi: Fix unregistration of controller with fixed SPI bus number
  spi: rspi: use correct enum for DMA transfer direction
  spi: jcore: disable ref_clk after getting its rate
  spi: bcm-qspi: fIX some error handling paths
  spi: pxa2xx: Disable runtime PM if controller registration fails
  spi: tegra20-slink: use true and false for boolean values
  spi: Fix scatterlist elements size in spi_map_buf
  spi: atmel: init FIFOs before spi enable
  spi: orion: Prepare space for per-child options
  spi: orion: Make the error message greppable
  spi: orion: Rework GPIO CS handling
  spi: bcm2835aux: Avoid 64-bit arithmetic in xfer len calc
  spi: spi-gpio: Augment device tree bindings
  spi: spi-gpio: Rewrite to use GPIO descriptors
  ...

17 files changed, 387 insertions, 302 deletions

diff --git a/drivers/spi/spi-atmel.c b/drivers/spi/spi-atmel.c
index 4a11fc0d4136..3f890d162934 100644
--- a/drivers/spi/spi-atmel.c
+++ b/drivers/spi/spi-atmel.c
@@ -768,14 +768,14 @@ static int atmel_spi_next_xfer_dma_submit(struct spi_master *master,
 		rxdesc = dmaengine_prep_slave_single(rxchan,
 						     as->dma_addr_rx_bbuf,
 						     xfer->len,
-						     DMA_FROM_DEVICE,
+						     DMA_DEV_TO_MEM,
 						     DMA_PREP_INTERRUPT |
 						     DMA_CTRL_ACK);
 	} else {
 		rxdesc = dmaengine_prep_slave_sg(rxchan,
 						 xfer->rx_sg.sgl,
 						 xfer->rx_sg.nents,
-						 DMA_FROM_DEVICE,
+						 DMA_DEV_TO_MEM,
 						 DMA_PREP_INTERRUPT |
 						 DMA_CTRL_ACK);
 	}
@@ -787,14 +787,14 @@ static int atmel_spi_next_xfer_dma_submit(struct spi_master *master,
 		memcpy(as->addr_tx_bbuf, xfer->tx_buf, xfer->len);
 		txdesc = dmaengine_prep_slave_single(txchan,
 						     as->dma_addr_tx_bbuf,
-						     xfer->len, DMA_TO_DEVICE,
+						     xfer->len, DMA_MEM_TO_DEV,
 						     DMA_PREP_INTERRUPT |
 						     DMA_CTRL_ACK);
 	} else {
 		txdesc = dmaengine_prep_slave_sg(txchan,
 						 xfer->tx_sg.sgl,
 						 xfer->tx_sg.nents,
-						 DMA_TO_DEVICE,
+						 DMA_MEM_TO_DEV,
 						 DMA_PREP_INTERRUPT |
 						 DMA_CTRL_ACK);
 	}
@@ -1512,6 +1512,11 @@ static void atmel_spi_init(struct atmel_spi *as)
 {
 	spi_writel(as, CR, SPI_BIT(SWRST));
 	spi_writel(as, CR, SPI_BIT(SWRST)); /* AT91SAM9263 Rev B workaround */
+
+	/* It is recommended to enable FIFOs first thing after reset */
+	if (as->fifo_size)
+		spi_writel(as, CR, SPI_BIT(FIFOEN));
+
 	if (as->caps.has_wdrbt) {
 		spi_writel(as, MR, SPI_BIT(WDRBT) | SPI_BIT(MODFDIS)
 				| SPI_BIT(MSTR));
@@ -1522,9 +1527,6 @@ static void atmel_spi_init(struct atmel_spi *as)
 	if (as->use_pdc)
 		spi_writel(as, PTCR, SPI_BIT(RXTDIS) | SPI_BIT(TXTDIS));
 	spi_writel(as, CR, SPI_BIT(SPIEN));
-
-	if (as->fifo_size)
-		spi_writel(as, CR, SPI_BIT(FIFOEN));
 }
 
 static int atmel_spi_probe(struct platform_device *pdev)
diff --git a/drivers/spi/spi-bcm-qspi.c b/drivers/spi/spi-bcm-qspi.c
index a172ab299e80..1596d35498c5 100644
--- a/drivers/spi/spi-bcm-qspi.c
+++ b/drivers/spi/spi-bcm-qspi.c
@@ -1247,7 +1247,7 @@ int bcm_qspi_probe(struct platform_device *pdev,
 		qspi->base[MSPI]  = devm_ioremap_resource(dev, res);
 		if (IS_ERR(qspi->base[MSPI])) {
 			ret = PTR_ERR(qspi->base[MSPI]);
-			goto qspi_probe_err;
+			goto qspi_resource_err;
 		}
 	} else {
 		goto qspi_resource_err;
@@ -1258,7 +1258,7 @@ int bcm_qspi_probe(struct platform_device *pdev,
 		qspi->base[BSPI]  = devm_ioremap_resource(dev, res);
 		if (IS_ERR(qspi->base[BSPI])) {
 			ret = PTR_ERR(qspi->base[BSPI]);
-			goto qspi_probe_err;
+			goto qspi_resource_err;
 		}
 		qspi->bspi_mode = true;
 	} else {
diff --git a/drivers/spi/spi-bcm2835aux.c b/drivers/spi/spi-bcm2835aux.c
index 7428091d3f5b..1431cb98fe40 100644
--- a/drivers/spi/spi-bcm2835aux.c
+++ b/drivers/spi/spi-bcm2835aux.c
@@ -321,7 +321,6 @@ static int bcm2835aux_spi_transfer_one(struct spi_master *master,
 	struct bcm2835aux_spi *bs = spi_master_get_devdata(master);
 	unsigned long spi_hz, clk_hz, speed;
 	unsigned long spi_used_hz;
-	unsigned long long xfer_time_us;
 
 	/* calculate the registers to handle
 	 *
@@ -358,20 +357,21 @@ static int bcm2835aux_spi_transfer_one(struct spi_master *master,
 	bs->rx_len = tfr->len;
 	bs->pending = 0;
 
-	/* calculate the estimated time in us the transfer runs
-	 * note that there are are 2 idle clocks after each
-	 * chunk getting transferred - in our case the chunk size
-	 * is 3 bytes, so we approximate this by 9 bits/byte
+	/* Calculate the estimated time in us the transfer runs.  Note that
+	 * there are are 2 idle clocks cycles after each chunk getting
+	 * transferred - in our case the chunk size is 3 bytes, so we
+	 * approximate this by 9 cycles/byte.  This is used to find the number
+	 * of Hz per byte per polling limit.  E.g., we can transfer 1 byte in
+	 * 30 µs per 300,000 Hz of bus clock.
 	 */
-	xfer_time_us = tfr->len * 9 * 1000000;
-	do_div(xfer_time_us, spi_used_hz);
-
+#define HZ_PER_BYTE ((9 * 1000000) / BCM2835_AUX_SPI_POLLING_LIMIT_US)
 	/* run in polling mode for short transfers */
-	if (xfer_time_us < BCM2835_AUX_SPI_POLLING_LIMIT_US)
+	if (tfr->len < spi_used_hz / HZ_PER_BYTE)
 		return bcm2835aux_spi_transfer_one_poll(master, spi, tfr);
 
 	/* run in interrupt mode for all others */
 	return bcm2835aux_spi_transfer_one_irq(master, spi, tfr);
+#undef HZ_PER_BYTE
 }
 
 static int bcm2835aux_spi_prepare_message(struct spi_master *master,
diff --git a/drivers/spi/spi-dw-mid.c b/drivers/spi/spi-dw-mid.c
index 837cb8d0bac6..3db905f5f345 100644
--- a/drivers/spi/spi-dw-mid.c
+++ b/drivers/spi/spi-dw-mid.c
@@ -112,10 +112,10 @@ static irqreturn_t dma_transfer(struct dw_spi *dws)
 	return IRQ_HANDLED;
 }
 
-static bool mid_spi_can_dma(struct spi_master *master, struct spi_device *spi,
-		struct spi_transfer *xfer)
+static bool mid_spi_can_dma(struct spi_controller *master,
+		struct spi_device *spi, struct spi_transfer *xfer)
 {
-	struct dw_spi *dws = spi_master_get_devdata(master);
+	struct dw_spi *dws = spi_controller_get_devdata(master);
 
 	if (!dws->dma_inited)
 		return false;
diff --git a/drivers/spi/spi-dw.c b/drivers/spi/spi-dw.c
index 211cc7d75bf8..f693bfe95ab9 100644
--- a/drivers/spi/spi-dw.c
+++ b/drivers/spi/spi-dw.c
@@ -135,7 +135,7 @@ static inline void dw_spi_debugfs_remove(struct dw_spi *dws)
 
 static void dw_spi_set_cs(struct spi_device *spi, bool enable)
 {
-	struct dw_spi *dws = spi_master_get_devdata(spi->master);
+	struct dw_spi *dws = spi_controller_get_devdata(spi->controller);
 	struct chip_data *chip = spi_get_ctldata(spi);
 
 	/* Chip select logic is inverted from spi_set_cs() */
@@ -250,8 +250,8 @@ static irqreturn_t interrupt_transfer(struct dw_spi *dws)
 
 static irqreturn_t dw_spi_irq(int irq, void *dev_id)
 {
-	struct spi_master *master = dev_id;
-	struct dw_spi *dws = spi_master_get_devdata(master);
+	struct spi_controller *master = dev_id;
+	struct dw_spi *dws = spi_controller_get_devdata(master);
 	u16 irq_status = dw_readl(dws, DW_SPI_ISR) & 0x3f;
 
 	if (!irq_status)
@@ -277,10 +277,10 @@ static int poll_transfer(struct dw_spi *dws)
 	return 0;
 }
 
-static int dw_spi_transfer_one(struct spi_master *master,
+static int dw_spi_transfer_one(struct spi_controller *master,
 		struct spi_device *spi, struct spi_transfer *transfer)
 {
-	struct dw_spi *dws = spi_master_get_devdata(master);
+	struct dw_spi *dws = spi_controller_get_devdata(master);
 	struct chip_data *chip = spi_get_ctldata(spi);
 	u8 imask = 0;
 	u16 txlevel = 0;
@@ -383,10 +383,10 @@ static int dw_spi_transfer_one(struct spi_master *master,
 	return 1;
 }
 
-static void dw_spi_handle_err(struct spi_master *master,
+static void dw_spi_handle_err(struct spi_controller *master,
 		struct spi_message *msg)
 {
-	struct dw_spi *dws = spi_master_get_devdata(master);
+	struct dw_spi *dws = spi_controller_get_devdata(master);
 
 	if (dws->dma_mapped)
 		dws->dma_ops->dma_stop(dws);
@@ -471,7 +471,7 @@ static void spi_hw_init(struct device *dev, struct dw_spi *dws)
 
 int dw_spi_add_host(struct device *dev, struct dw_spi *dws)
 {
-	struct spi_master *master;
+	struct spi_controller *master;
 	int ret;
 
 	BUG_ON(dws == NULL);
@@ -518,8 +518,8 @@ int dw_spi_add_host(struct device *dev, struct dw_spi *dws)
 		}
 	}
 
-	spi_master_set_devdata(master, dws);
-	ret = devm_spi_register_master(dev, master);
+	spi_controller_set_devdata(master, dws);
+	ret = devm_spi_register_controller(dev, master);
 	if (ret) {
 		dev_err(&master->dev, "problem registering spi master\n");
 		goto err_dma_exit;
@@ -534,7 +534,7 @@ err_dma_exit:
 	spi_enable_chip(dws, 0);
 	free_irq(dws->irq, master);
 err_free_master:
-	spi_master_put(master);
+	spi_controller_put(master);
 	return ret;
 }
 EXPORT_SYMBOL_GPL(dw_spi_add_host);
@@ -556,7 +556,7 @@ int dw_spi_suspend_host(struct dw_spi *dws)
 {
 	int ret;
 
-	ret = spi_master_suspend(dws->master);
+	ret = spi_controller_suspend(dws->master);
 	if (ret)
 		return ret;
 
@@ -570,7 +570,7 @@ int dw_spi_resume_host(struct dw_spi *dws)
 	int ret;
 
 	spi_hw_init(&dws->master->dev, dws);
-	ret = spi_master_resume(dws->master);
+	ret = spi_controller_resume(dws->master);
 	if (ret)
 		dev_err(&dws->master->dev, "fail to start queue (%d)\n", ret);
 	return ret;
diff --git a/drivers/spi/spi-dw.h b/drivers/spi/spi-dw.h
index 5c07cf8f19e0..2cde2473b3e9 100644
--- a/drivers/spi/spi-dw.h
+++ b/drivers/spi/spi-dw.h
@@ -93,14 +93,14 @@ struct dw_spi_dma_ops {
 	int (*dma_init)(struct dw_spi *dws);
 	void (*dma_exit)(struct dw_spi *dws);
 	int (*dma_setup)(struct dw_spi *dws, struct spi_transfer *xfer);
-	bool (*can_dma)(struct spi_master *master, struct spi_device *spi,
+	bool (*can_dma)(struct spi_controller *master, struct spi_device *spi,
 			struct spi_transfer *xfer);
 	int (*dma_transfer)(struct dw_spi *dws, struct spi_transfer *xfer);
 	void (*dma_stop)(struct dw_spi *dws);
 };
 
 struct dw_spi {
-	struct spi_master	*master;
+	struct spi_controller	*master;
 	enum dw_ssi_type	type;
 
 	void __iomem		*regs;
diff --git a/drivers/spi/spi-gpio.c b/drivers/spi/spi-gpio.c
index 1c34c9314c8a..b85a93cad44a 100644
--- a/drivers/spi/spi-gpio.c
+++ b/drivers/spi/spi-gpio.c
@@ -2,6 +2,7 @@
  * SPI master driver using generic bitbanged GPIO
  *
  * Copyright (C) 2006,2008 David Brownell
+ * Copyright (C) 2017 Linus Walleij
  *
  * 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
@@ -16,10 +17,9 @@
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
-#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
-#include <linux/of_gpio.h>
 
 #include <linux/spi/spi.h>
 #include <linux/spi/spi_bitbang.h>
@@ -44,7 +44,11 @@ struct spi_gpio {
 	struct spi_bitbang		bitbang;
 	struct spi_gpio_platform_data	pdata;
 	struct platform_device		*pdev;
-	unsigned long			cs_gpios[0];
+	struct gpio_desc		*sck;
+	struct gpio_desc		*miso;
+	struct gpio_desc		*mosi;
+	struct gpio_desc		**cs_gpios;
+	bool				has_cs;
 };
 
 /*----------------------------------------------------------------------*/
@@ -77,13 +81,6 @@ struct spi_gpio {
 
 #define GENERIC_BITBANG	/* vs tight inlines */
 
-/* all functions referencing these symbols must define pdata */
-#define SPI_MISO_GPIO	((pdata)->miso)
-#define SPI_MOSI_GPIO	((pdata)->mosi)
-#define SPI_SCK_GPIO	((pdata)->sck)
-
-#define SPI_N_CHIPSEL	((pdata)->num_chipselect)
-
 #endif
 
 /*----------------------------------------------------------------------*/
@@ -105,25 +102,27 @@ spi_to_pdata(const struct spi_device *spi)
 	return &spi_to_spi_gpio(spi)->pdata;
 }
 
-/* this is #defined to avoid unused-variable warnings when inlining */
-#define pdata		spi_to_pdata(spi)
-
+/* These helpers are in turn called by the bitbang inlines */
 static inline void setsck(const struct spi_device *spi, int is_on)
 {
-	gpio_set_value_cansleep(SPI_SCK_GPIO, is_on);
+	struct spi_gpio *spi_gpio = spi_to_spi_gpio(spi);
+
+	gpiod_set_value_cansleep(spi_gpio->sck, is_on);
 }
 
 static inline void setmosi(const struct spi_device *spi, int is_on)
 {
-	gpio_set_value_cansleep(SPI_MOSI_GPIO, is_on);
+	struct spi_gpio *spi_gpio = spi_to_spi_gpio(spi);
+
+	gpiod_set_value_cansleep(spi_gpio->mosi, is_on);
 }
 
 static inline int getmiso(const struct spi_device *spi)
 {
-	return !!gpio_get_value_cansleep(SPI_MISO_GPIO);
-}
+	struct spi_gpio *spi_gpio = spi_to_spi_gpio(spi);
 
-#undef pdata
+	return !!gpiod_get_value_cansleep(spi_gpio->miso);
+}
 
 /*
  * NOTE:  this clocks "as fast as we can".  It "should" be a function of the
@@ -216,123 +215,89 @@ static u32 spi_gpio_spec_txrx_word_mode3(struct spi_device *spi,
 static void spi_gpio_chipselect(struct spi_device *spi, int is_active)
 {
 	struct spi_gpio *spi_gpio = spi_to_spi_gpio(spi);
-	unsigned long cs = spi_gpio->cs_gpios[spi->chip_select];
 
-	/* set initial clock polarity */
+	/* set initial clock line level */
 	if (is_active)
-		setsck(spi, spi->mode & SPI_CPOL);
+		gpiod_set_value_cansleep(spi_gpio->sck, spi->mode & SPI_CPOL);
+
+	/* Drive chip select line, if we have one */
+	if (spi_gpio->has_cs) {
+		struct gpio_desc *cs = spi_gpio->cs_gpios[spi->chip_select];
 
-	if (cs != SPI_GPIO_NO_CHIPSELECT) {
-		/* SPI is normally active-low */
-		gpio_set_value_cansleep(cs, (spi->mode & SPI_CS_HIGH) ? is_active : !is_active);
+		/* SPI chip selects are normally active-low */
+		gpiod_set_value_cansleep(cs, (spi->mode & SPI_CS_HIGH) ? is_active : !is_active);
 	}
 }
 
 static int spi_gpio_setup(struct spi_device *spi)
 {
-	unsigned long		cs;
+	struct gpio_desc	*cs;
 	int			status = 0;
 	struct spi_gpio		*spi_gpio = spi_to_spi_gpio(spi);
-	struct device_node	*np = spi->master->dev.of_node;
-
-	if (np) {
-		/*
-		 * In DT environments, the CS GPIOs have already been
-		 * initialized from the "cs-gpios" property of the node.
-		 */
-		cs = spi_gpio->cs_gpios[spi->chip_select];
-	} else {
-		/*
-		 * ... otherwise, take it from spi->controller_data
-		 */
-		cs = (uintptr_t) spi->controller_data;
-	}
 
-	if (!spi->controller_state) {
-		if (cs != SPI_GPIO_NO_CHIPSELECT) {
-			status = gpio_request(cs, dev_name(&spi->dev));
-			if (status)
-				return status;
-			status = gpio_direction_output(cs,
-					!(spi->mode & SPI_CS_HIGH));
-		}
-	}
-	if (!status) {
-		/* in case it was initialized from static board data */
-		spi_gpio->cs_gpios[spi->chip_select] = cs;
+	/*
+	 * The CS GPIOs have already been
+	 * initialized from the descriptor lookup.
+	 */
+	cs = spi_gpio->cs_gpios[spi->chip_select];
+	if (!spi->controller_state && cs)
+		status = gpiod_direction_output(cs,
+						!(spi->mode & SPI_CS_HIGH));
+
+	if (!status)
 		status = spi_bitbang_setup(spi);
-	}
 
-	if (status) {
-		if (!spi->controller_state && cs != SPI_GPIO_NO_CHIPSELECT)
-			gpio_free(cs);
-	}
 	return status;
 }
 
 static void spi_gpio_cleanup(struct spi_device *spi)
 {
-	struct spi_gpio *spi_gpio = spi_to_spi_gpio(spi);
-	unsigned long cs = spi_gpio->cs_gpios[spi->chip_select];
-
-	if (cs != SPI_GPIO_NO_CHIPSELECT)
-		gpio_free(cs);
 	spi_bitbang_cleanup(spi);
 }
 
-static int spi_gpio_alloc(unsigned pin, const char *label, bool is_in)
-{
-	int value;
-
-	value = gpio_request(pin, label);
-	if (value == 0) {
-		if (is_in)
-			value = gpio_direction_input(pin);
-		else
-			value = gpio_direction_output(pin, 0);
-	}
-	return value;
-}
-
-static int spi_gpio_request(struct spi_gpio_platform_data *pdata,
-			    const char *label, u16 *res_flags)
+/*
+ * It can be convenient to use this driver with pins that have alternate
+ * functions associated with a "native" SPI controller if a driver for that
+ * controller is not available, or is missing important functionality.
+ *
+ * On platforms which can do so, configure MISO with a weak pullup unless
+ * there's an external pullup on that signal.  That saves power by avoiding
+ * floating signals.  (A weak pulldown would save power too, but many
+ * drivers expect to see all-ones data as the no slave "response".)
+ */
+static int spi_gpio_request(struct device *dev,
+			    struct spi_gpio *spi_gpio,
+			    unsigned int num_chipselects,
+			    u16 *mflags)
 {
-	int value;
-
-	/* NOTE:  SPI_*_GPIO symbols may reference "pdata" */
+	int i;
 
-	if (SPI_MOSI_GPIO != SPI_GPIO_NO_MOSI) {
-		value = spi_gpio_alloc(SPI_MOSI_GPIO, label, false);
-		if (value)
-			goto done;
-	} else {
+	spi_gpio->mosi = devm_gpiod_get_optional(dev, "mosi", GPIOD_OUT_LOW);
+	if (IS_ERR(spi_gpio->mosi))
+		return PTR_ERR(spi_gpio->mosi);
+	if (!spi_gpio->mosi)
 		/* HW configuration without MOSI pin */
-		*res_flags |= SPI_MASTER_NO_TX;
-	}
+		*mflags |= SPI_MASTER_NO_TX;
 
-	if (SPI_MISO_GPIO != SPI_GPIO_NO_MISO) {
-		value = spi_gpio_alloc(SPI_MISO_GPIO, label, true);
-		if (value)
-			goto free_mosi;
-	} else {
+	spi_gpio->miso = devm_gpiod_get_optional(dev, "miso", GPIOD_IN);
+	if (IS_ERR(spi_gpio->miso))
+		return PTR_ERR(spi_gpio->miso);
+	if (!spi_gpio->miso)
 		/* HW configuration without MISO pin */
-		*res_flags |= SPI_MASTER_NO_RX;
-	}
+		*mflags |= SPI_MASTER_NO_RX;
 
-	value = spi_gpio_alloc(SPI_SCK_GPIO, label, false);
-	if (value)
-		goto free_miso;
+	spi_gpio->sck = devm_gpiod_get(dev, "sck", GPIOD_OUT_LOW);
+	if (IS_ERR(spi_gpio->mosi))
+		return PTR_ERR(spi_gpio->mosi);
 
-	goto done;
+	for (i = 0; i < num_chipselects; i++) {
+		spi_gpio->cs_gpios[i] = devm_gpiod_get_index(dev, "cs",
+							     i, GPIOD_OUT_HIGH);
+		if (IS_ERR(spi_gpio->cs_gpios[i]))
+			return PTR_ERR(spi_gpio->cs_gpios[i]);
+	}
 
-free_miso:
-	if (SPI_MISO_GPIO != SPI_GPIO_NO_MISO)
-		gpio_free(SPI_MISO_GPIO);
-free_mosi:
-	if (SPI_MOSI_GPIO != SPI_GPIO_NO_MOSI)
-		gpio_free(SPI_MOSI_GPIO);
-done:
-	return value;
+	return 0;
 }
 
 #ifdef CONFIG_OF
@@ -358,26 +323,6 @@ static int spi_gpio_probe_dt(struct platform_device *pdev)
 	if (!pdata)
 		return -ENOMEM;
 
-	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) {
@@ -409,7 +354,6 @@ static int spi_gpio_probe(struct platform_device *pdev)
 	struct spi_gpio_platform_data	*pdata;
 	u16 master_flags = 0;
 	bool use_of = 0;
-	int num_devices;
 
 	status = spi_gpio_probe_dt(pdev);
 	if (status < 0)
@@ -423,59 +367,41 @@ static int spi_gpio_probe(struct platform_device *pdev)
 		return -ENODEV;
 #endif
 
-	if (use_of && !SPI_N_CHIPSEL)
-		num_devices = 1;
-	else
-		num_devices = SPI_N_CHIPSEL;
-
-	status = spi_gpio_request(pdata, dev_name(&pdev->dev), &master_flags);
-	if (status < 0)
-		return status;
+	master = spi_alloc_master(&pdev->dev, sizeof(*spi_gpio));
+	if (!master)
+		return -ENOMEM;
 
-	master = spi_alloc_master(&pdev->dev, sizeof(*spi_gpio) +
-					(sizeof(unsigned long) * num_devices));
-	if (!master) {
-		status = -ENOMEM;
-		goto gpio_free;
-	}
 	spi_gpio = spi_master_get_devdata(master);
+
+	spi_gpio->cs_gpios = devm_kzalloc(&pdev->dev,
+				pdata->num_chipselect * sizeof(*spi_gpio->cs_gpios),
+				GFP_KERNEL);
+	if (!spi_gpio->cs_gpios)
+		return -ENOMEM;
+
 	platform_set_drvdata(pdev, spi_gpio);
 
+	/* Determine if we have chip selects connected */
+	spi_gpio->has_cs = !!pdata->num_chipselect;
+
 	spi_gpio->pdev = pdev;
 	if (pdata)
 		spi_gpio->pdata = *pdata;
 
+	status = spi_gpio_request(&pdev->dev, spi_gpio,
+				  pdata->num_chipselect, &master_flags);
+	if (status)
+		return status;
+
 	master->bits_per_word_mask = SPI_BPW_RANGE_MASK(1, 32);
 	master->flags = master_flags;
 	master->bus_num = pdev->id;
-	master->num_chipselect = num_devices;
+	/* The master needs to think there is a chipselect even if not connected */
+	master->num_chipselect = spi_gpio->has_cs ? pdata->num_chipselect : 1;
 	master->setup = spi_gpio_setup;
 	master->cleanup = spi_gpio_cleanup;
 #ifdef CONFIG_OF
 	master->dev.of_node = pdev->dev.of_node;
-
-	if (use_of) {
-		int i;
-		struct device_node *np = pdev->dev.of_node;
-
-		/*
-		 * In DT environments, take the CS GPIO from the "cs-gpios"
-		 * property of the node.
-		 */
-
-		if (!SPI_N_CHIPSEL)
-			spi_gpio->cs_gpios[0] = SPI_GPIO_NO_CHIPSELECT;
-		else
-			for (i = 0; i < SPI_N_CHIPSEL; i++) {
-				status = of_get_named_gpio(np, "cs-gpios", i);
-				if (status < 0) {
-					dev_err(&pdev->dev,
-						"invalid cs-gpios property\n");
-					goto gpio_free;
-				}
-				spi_gpio->cs_gpios[i] = status;
-			}
-	}
 #endif
 
 	spi_gpio->bitbang.master = master;
@@ -496,15 +422,8 @@ static int spi_gpio_probe(struct platform_device *pdev)
 	spi_gpio->bitbang.flags = SPI_CS_HIGH;
 
 	status = spi_bitbang_start(&spi_gpio->bitbang);
-	if (status < 0) {
-gpio_free:
-		if (SPI_MISO_GPIO != SPI_GPIO_NO_MISO)
-			gpio_free(SPI_MISO_GPIO);
-		if (SPI_MOSI_GPIO != SPI_GPIO_NO_MOSI)
-			gpio_free(SPI_MOSI_GPIO);
-		gpio_free(SPI_SCK_GPIO);
+	if (status)
 		spi_master_put(master);
-	}
 
 	return status;
 }
@@ -520,11 +439,6 @@ static int spi_gpio_remove(struct platform_device *pdev)
 	/* stop() unregisters child devices too */
 	spi_bitbang_stop(&spi_gpio->bitbang);
 
-	if (SPI_MISO_GPIO != SPI_GPIO_NO_MISO)
-		gpio_free(SPI_MISO_GPIO);
-	if (SPI_MOSI_GPIO != SPI_GPIO_NO_MOSI)
-		gpio_free(SPI_MOSI_GPIO);
-	gpio_free(SPI_SCK_GPIO);
 	spi_master_put(spi_gpio->bitbang.master);
 
 	return 0;
diff --git a/drivers/spi/spi-jcore.c b/drivers/spi/spi-jcore.c
index dafed6280df3..702fe573a47b 100644
--- a/drivers/spi/spi-jcore.c
+++ b/drivers/spi/spi-jcore.c
@@ -184,10 +184,11 @@ static int jcore_spi_probe(struct platform_device *pdev)
 	 */
 	clock_freq = 50000000;
 	clk = devm_clk_get(&pdev->dev, "ref_clk");
-	if (!IS_ERR_OR_NULL(clk)) {
-		if (clk_enable(clk) == 0)
+	if (!IS_ERR(clk)) {
+		if (clk_prepare_enable(clk) == 0) {
 			clock_freq = clk_get_rate(clk);
-		else
+			clk_disable_unprepare(clk);
+		} else
 			dev_warn(&pdev->dev, "could not enable ref_clk\n");
 	}
 	hw->clock_freq = clock_freq;
@@ -198,10 +199,8 @@ static int jcore_spi_probe(struct platform_device *pdev)
 
 	/* Register our spi controller */
 	err = devm_spi_register_master(&pdev->dev, master);
-	if (err) {
-		clk_disable(clk);
+	if (err)
 		goto exit;
-	}
 
 	return 0;
 
diff --git a/drivers/spi/spi-orion.c b/drivers/spi/spi-orion.c
index deca63e82ff6..d01a6adc726e 100644
--- a/drivers/spi/spi-orion.c
+++ b/drivers/spi/spi-orion.c
@@ -90,14 +90,19 @@ struct orion_direct_acc {
 	u32			size;
 };
 
+struct orion_child_options {
+	struct orion_direct_acc direct_access;
+};
+
 struct orion_spi {
 	struct spi_master	*master;
 	void __iomem		*base;
 	struct clk              *clk;
 	struct clk              *axi_clk;
 	const struct orion_spi_dev *devdata;
+	int			unused_hw_gpio;
 
-	struct orion_direct_acc	direct_access[ORION_NUM_CHIPSELECTS];
+	struct orion_child_options	child[ORION_NUM_CHIPSELECTS];
 };
 
 static inline void __iomem *spi_reg(struct orion_spi *orion_spi, u32 reg)
@@ -324,13 +329,13 @@ static void orion_spi_set_cs(struct spi_device *spi, bool enable)
 	struct orion_spi *orion_spi;
 	int cs;
 
+	orion_spi = spi_master_get_devdata(spi->master);
+
 	if (gpio_is_valid(spi->cs_gpio))
-		cs = 0;
+		cs = orion_spi->unused_hw_gpio;
 	else
 		cs = spi->chip_select;
 
-	orion_spi = spi_master_get_devdata(spi->master);
-
 	orion_spi_clrbits(orion_spi, ORION_SPI_IF_CTRL_REG, ORION_SPI_CS_MASK);
 	orion_spi_setbits(orion_spi, ORION_SPI_IF_CTRL_REG,
 				ORION_SPI_CS(cs));
@@ -435,7 +440,7 @@ orion_spi_write_read(struct spi_device *spi, struct spi_transfer *xfer)
 	 * Use SPI direct write mode if base address is available. Otherwise
 	 * fall back to PIO mode for this transfer.
 	 */
-	if ((orion_spi->direct_access[cs].vaddr) && (xfer->tx_buf) &&
+	if ((orion_spi->child[cs].direct_access.vaddr) && (xfer->tx_buf) &&
 	    (word_len == 8)) {
 		unsigned int cnt = count / 4;
 		unsigned int rem = count % 4;
@@ -444,12 +449,12 @@ orion_spi_write_read(struct spi_device *spi, struct spi_transfer *xfer)
 		 * Send the TX-data to the SPI device via the direct
 		 * mapped address window
 		 */
-		iowrite32_rep(orion_spi->direct_access[cs].vaddr,
+		iowrite32_rep(orion_spi->child[cs].direct_access.vaddr,
 			      xfer->tx_buf, cnt);
 		if (rem) {
 			u32 *buf = (u32 *)xfer->tx_buf;
 
-			iowrite8_rep(orion_spi->direct_access[cs].vaddr,
+			iowrite8_rep(orion_spi->child[cs].direct_access.vaddr,
 				     &buf[cnt], rem);
 		}
 
@@ -498,6 +503,9 @@ static int orion_spi_transfer_one(struct spi_master *master,
 
 static int orion_spi_setup(struct spi_device *spi)
 {
+	if (gpio_is_valid(spi->cs_gpio)) {
+		gpio_direction_output(spi->cs_gpio, !(spi->mode & SPI_CS_HIGH));
+	}
 	return orion_spi_setup_transfer(spi, NULL);
 }
 
@@ -620,6 +628,7 @@ static int orion_spi_probe(struct platform_device *pdev)
 
 	spi = spi_master_get_devdata(master);
 	spi->master = master;
+	spi->unused_hw_gpio = -1;
 
 	of_id = of_match_device(orion_spi_of_match_table, &pdev->dev);
 	devdata = (of_id) ? of_id->data : &orion_spi_dev_data;
@@ -702,14 +711,14 @@ static int orion_spi_probe(struct platform_device *pdev)
 		 * This needs to get extended for the direct SPI-NOR / SPI-NAND
 		 * support, once this gets implemented.
 		 */
-		spi->direct_access[cs].vaddr = devm_ioremap(&pdev->dev,
+		spi->child[cs].direct_access.vaddr = devm_ioremap(&pdev->dev,
 							    r->start,
 							    PAGE_SIZE);
-		if (!spi->direct_access[cs].vaddr) {
+		if (!spi->child[cs].direct_access.vaddr) {
 			status = -ENOMEM;
 			goto out_rel_axi_clk;
 		}
-		spi->direct_access[cs].size = PAGE_SIZE;
+		spi->child[cs].direct_access.size = PAGE_SIZE;
 
 		dev_info(&pdev->dev, "CS%d configured for direct access\n", cs);
 	}
@@ -731,8 +740,44 @@ static int orion_spi_probe(struct platform_device *pdev)
 	if (status < 0)
 		goto out_rel_pm;
 
+	if (master->cs_gpios) {
+		int i;
+		for (i = 0; i < master->num_chipselect; ++i) {
+			char *gpio_name;
+
+			if (!gpio_is_valid(master->cs_gpios[i])) {
+				continue;
+			}
+
+			gpio_name = devm_kasprintf(&pdev->dev, GFP_KERNEL,
+					"%s-CS%d", dev_name(&pdev->dev), i);
+			if (!gpio_name) {
+				status = -ENOMEM;
+				goto out_rel_master;
+			}
+
+			status = devm_gpio_request(&pdev->dev,
+					master->cs_gpios[i], gpio_name);
+			if (status) {
+				dev_err(&pdev->dev,
+					"Can't request GPIO for CS %d\n",
+					master->cs_gpios[i]);
+				goto out_rel_master;
+			}
+			if (spi->unused_hw_gpio == -1) {
+				dev_info(&pdev->dev,
+					"Selected unused HW CS#%d for any GPIO CSes\n",
+					i);
+				spi->unused_hw_gpio = i;
+			}
+		}
+	}
+
+
 	return status;
 
+out_rel_master:
+	spi_unregister_master(master);
 out_rel_pm:
 	pm_runtime_disable(&pdev->dev);
 out_rel_axi_clk:
diff --git a/drivers/spi/spi-pxa2xx-dma.c b/drivers/spi/spi-pxa2xx-dma.c
index 04f3eecf5cf3..3d7f66080c57 100644
--- a/drivers/spi/spi-pxa2xx-dma.c
+++ b/drivers/spi/spi-pxa2xx-dma.c
@@ -191,7 +191,7 @@ int pxa2xx_spi_dma_setup(struct driver_data *drv_data)
 {
 	struct pxa2xx_spi_master *pdata = drv_data->master_info;
 	struct device *dev = &drv_data->pdev->dev;
-	struct spi_master *master = drv_data->master;
+	struct spi_controller *master = drv_data->master;
 	dma_cap_mask_t mask;
 
 	dma_cap_zero(mask);
@@ -215,7 +215,7 @@ int pxa2xx_spi_dma_setup(struct driver_data *drv_data)
 
 void pxa2xx_spi_dma_release(struct driver_data *drv_data)
 {
-	struct spi_master *master = drv_data->master;
+	struct spi_controller *master = drv_data->master;
 
 	if (master->dma_rx) {
 		dmaengine_terminate_sync(master->dma_rx);
diff --git a/drivers/spi/spi-pxa2xx.c b/drivers/spi/spi-pxa2xx.c
index b0822d1dba29..82dcb88fcfba 100644
--- a/drivers/spi/spi-pxa2xx.c
+++ b/drivers/spi/spi-pxa2xx.c
@@ -415,10 +415,17 @@ static void cs_deassert(struct driver_data *drv_data)
 {
 	struct chip_data *chip =
 		spi_get_ctldata(drv_data->master->cur_msg->spi);
+	unsigned long timeout;
 
 	if (drv_data->ssp_type == CE4100_SSP)
 		return;
 
+	/* Wait until SSP becomes idle before deasserting the CS */
+	timeout = jiffies + msecs_to_jiffies(10);
+	while (pxa2xx_spi_read(drv_data, SSSR) & SSSR_BSY &&
+	       !time_after(jiffies, timeout))
+		cpu_relax();
+
 	if (chip->cs_control) {
 		chip->cs_control(PXA2XX_CS_DEASSERT);
 		return;
@@ -563,7 +570,6 @@ static void giveback(struct driver_data *drv_data)
 {
 	struct spi_transfer* last_transfer;
 	struct spi_message *msg;
-	unsigned long timeout;
 
 	msg = drv_data->master->cur_msg;
 	drv_data->cur_transfer = NULL;
@@ -575,12 +581,6 @@ static void giveback(struct driver_data *drv_data)
 	if (last_transfer->delay_usecs)
 		udelay(last_transfer->delay_usecs);
 
-	/* Wait until SSP becomes idle before deasserting the CS */
-	timeout = jiffies + msecs_to_jiffies(10);
-	while (pxa2xx_spi_read(drv_data, SSSR) & SSSR_BSY &&
-	       !time_after(jiffies, timeout))
-		cpu_relax();
-
 	/* Drop chip select UNLESS cs_change is true or we are returning
 	 * a message with an error, or next message is for another chip
 	 */
@@ -962,7 +962,7 @@ static unsigned int pxa2xx_ssp_get_clk_div(struct driver_data *drv_data,
 	return clk_div << 8;
 }
 
-static bool pxa2xx_spi_can_dma(struct spi_master *master,
+static bool pxa2xx_spi_can_dma(struct spi_controller *master,
 			       struct spi_device *spi,
 			       struct spi_transfer *xfer)
 {
@@ -976,7 +976,7 @@ static bool pxa2xx_spi_can_dma(struct spi_master *master,
 static void pump_transfers(unsigned long data)
 {
 	struct driver_data *drv_data = (struct driver_data *)data;
-	struct spi_master *master = drv_data->master;
+	struct spi_controller *master = drv_data->master;
 	struct spi_message *message = master->cur_msg;
 	struct chip_data *chip = spi_get_ctldata(message->spi);
 	u32 dma_thresh = chip->dma_threshold;
@@ -1182,10 +1182,10 @@ static void pump_transfers(unsigned long data)
 	pxa2xx_spi_write(drv_data, SSCR1, cr1);
 }
 
-static int pxa2xx_spi_transfer_one_message(struct spi_master *master,
+static int pxa2xx_spi_transfer_one_message(struct spi_controller *master,
 					   struct spi_message *msg)
 {
-	struct driver_data *drv_data = spi_master_get_devdata(master);
+	struct driver_data *drv_data = spi_controller_get_devdata(master);
 
 	/* Initial message state*/
 	msg->state = START_STATE;
@@ -1198,9 +1198,9 @@ static int pxa2xx_spi_transfer_one_message(struct spi_master *master,
 	return 0;
 }
 
-static int pxa2xx_spi_unprepare_transfer(struct spi_master *master)
+static int pxa2xx_spi_unprepare_transfer(struct spi_controller *master)
 {
-	struct driver_data *drv_data = spi_master_get_devdata(master);
+	struct driver_data *drv_data = spi_controller_get_devdata(master);
 
 	/* Disable the SSP now */
 	pxa2xx_spi_write(drv_data, SSCR0,
@@ -1212,7 +1212,8 @@ static int pxa2xx_spi_unprepare_transfer(struct spi_master *master)
 static int setup_cs(struct spi_device *spi, struct chip_data *chip,
 		    struct pxa2xx_spi_chip *chip_info)
 {
-	struct driver_data *drv_data = spi_master_get_devdata(spi->master);
+	struct driver_data *drv_data =
+		spi_controller_get_devdata(spi->controller);
 	struct gpio_desc *gpiod;
 	int err = 0;
 
@@ -1270,7 +1271,8 @@ static int setup(struct spi_device *spi)
 	struct pxa2xx_spi_chip *chip_info;
 	struct chip_data *chip;
 	const struct lpss_config *config;
-	struct driver_data *drv_data = spi_master_get_devdata(spi->master);
+	struct driver_data *drv_data =
+		spi_controller_get_devdata(spi->controller);
 	uint tx_thres, tx_hi_thres, rx_thres;
 
 	switch (drv_data->ssp_type) {
@@ -1410,7 +1412,8 @@ static int setup(struct spi_device *spi)
 static void cleanup(struct spi_device *spi)
 {
 	struct chip_data *chip = spi_get_ctldata(spi);
-	struct driver_data *drv_data = spi_master_get_devdata(spi->master);
+	struct driver_data *drv_data =
+		spi_controller_get_devdata(spi->controller);
 
 	if (!chip)
 		return;
@@ -1575,9 +1578,10 @@ pxa2xx_spi_init_pdata(struct platform_device *pdev)
 }
 #endif
 
-static int pxa2xx_spi_fw_translate_cs(struct spi_master *master, unsigned cs)
+static int pxa2xx_spi_fw_translate_cs(struct spi_controller *master,
+				      unsigned int cs)
 {
-	struct driver_data *drv_data = spi_master_get_devdata(master);
+	struct driver_data *drv_data = spi_controller_get_devdata(master);
 
 	if (has_acpi_companion(&drv_data->pdev->dev)) {
 		switch (drv_data->ssp_type) {
@@ -1602,7 +1606,7 @@ static int pxa2xx_spi_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct pxa2xx_spi_master *platform_info;
-	struct spi_master *master;
+	struct spi_controller *master;
 	struct driver_data *drv_data;
 	struct ssp_device *ssp;
 	const struct lpss_config *config;
@@ -1633,7 +1637,7 @@ static int pxa2xx_spi_probe(struct platform_device *pdev)
 		pxa_ssp_free(ssp);
 		return -ENOMEM;
 	}
-	drv_data = spi_master_get_devdata(master);
+	drv_data = spi_controller_get_devdata(master);
 	drv_data->master = master;
 	drv_data->master_info = platform_info;
 	drv_data->pdev = pdev;
@@ -1651,7 +1655,7 @@ static int pxa2xx_spi_probe(struct platform_device *pdev)
 	master->unprepare_transfer_hardware = pxa2xx_spi_unprepare_transfer;
 	master->fw_translate_cs = pxa2xx_spi_fw_translate_cs;
 	master->auto_runtime_pm = true;
-	master->flags = SPI_MASTER_MUST_RX | SPI_MASTER_MUST_TX;
+	master->flags = SPI_CONTROLLER_MUST_RX | SPI_CONTROLLER_MUST_TX;
 
 	drv_data->ssp_type = ssp->type;
 
@@ -1793,7 +1797,7 @@ static int pxa2xx_spi_probe(struct platform_device *pdev)
 
 	/* Register with the SPI framework */
 	platform_set_drvdata(pdev, drv_data);
-	status = devm_spi_register_master(&pdev->dev, master);
+	status = devm_spi_register_controller(&pdev->dev, master);
 	if (status != 0) {
 		dev_err(&pdev->dev, "problem registering spi master\n");
 		goto out_error_clock_enabled;
@@ -1802,12 +1806,14 @@ static int pxa2xx_spi_probe(struct platform_device *pdev)
 	return status;
 
 out_error_clock_enabled:
+	pm_runtime_put_noidle(&pdev->dev);
+	pm_runtime_disable(&pdev->dev);
 	clk_disable_unprepare(ssp->clk);
 	pxa2xx_spi_dma_release(drv_data);
 	free_irq(ssp->irq, drv_data);
 
 out_error_master_alloc:
-	spi_master_put(master);
+	spi_controller_put(master);
 	pxa_ssp_free(ssp);
 	return status;
 }
@@ -1858,7 +1864,7 @@ static int pxa2xx_spi_suspend(struct device *dev)
 	struct ssp_device *ssp = drv_data->ssp;
 	int status;
 
-	status = spi_master_suspend(drv_data->master);
+	status = spi_controller_suspend(drv_data->master);
 	if (status != 0)
 		return status;
 	pxa2xx_spi_write(drv_data, SSCR0, 0);
@@ -1884,7 +1890,7 @@ static int pxa2xx_spi_resume(struct device *dev)
 		lpss_ssp_setup(drv_data);
 
 	/* Start the queue running */
-	status = spi_master_resume(drv_data->master);
+	status = spi_controller_resume(drv_data->master);
 	if (status != 0) {
 		dev_err(dev, "problem starting queue (%d)\n", status);
 		return status;
diff --git a/drivers/spi/spi-pxa2xx.h b/drivers/spi/spi-pxa2xx.h
index 94f7b0713281..513ec6c6e25b 100644
--- a/drivers/spi/spi-pxa2xx.h
+++ b/drivers/spi/spi-pxa2xx.h
@@ -31,7 +31,7 @@ struct driver_data {
 
 	/* SPI framework hookup */
 	enum pxa_ssp_type ssp_type;
-	struct spi_master *master;
+	struct spi_controller *master;
 
 	/* PXA hookup */
 	struct pxa2xx_spi_master *master_info;
diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c
index 0835a8d88fb8..95dc4d78618d 100644
--- a/drivers/spi/spi-rspi.c
+++ b/drivers/spi/spi-rspi.c
@@ -535,7 +535,7 @@ static int rspi_dma_transfer(struct rspi_data *rspi, struct sg_table *tx,
 	/* First prepare and submit the DMA request(s), as this may fail */
 	if (rx) {
 		desc_rx = dmaengine_prep_slave_sg(rspi->master->dma_rx,
-					rx->sgl, rx->nents, DMA_FROM_DEVICE,
+					rx->sgl, rx->nents, DMA_DEV_TO_MEM,
 					DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
 		if (!desc_rx) {
 			ret = -EAGAIN;
@@ -555,7 +555,7 @@ static int rspi_dma_transfer(struct rspi_data *rspi, struct sg_table *tx,
 
 	if (tx) {
 		desc_tx = dmaengine_prep_slave_sg(rspi->master->dma_tx,
-					tx->sgl, tx->nents, DMA_TO_DEVICE,
+					tx->sgl, tx->nents, DMA_MEM_TO_DEV,
 					DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
 		if (!desc_tx) {
 			ret = -EAGAIN;
diff --git a/drivers/spi/spi-sh-msiof.c b/drivers/spi/spi-sh-msiof.c
index c5dcfb434a49..ae086aab57d5 100644
--- a/drivers/spi/spi-sh-msiof.c
+++ b/drivers/spi/spi-sh-msiof.c
@@ -752,7 +752,7 @@ static int sh_msiof_dma_once(struct sh_msiof_spi_priv *p, const void *tx,
 	if (rx) {
 		ier_bits |= IER_RDREQE | IER_RDMAE;
 		desc_rx = dmaengine_prep_slave_single(p->master->dma_rx,
-					p->rx_dma_addr, len, DMA_FROM_DEVICE,
+					p->rx_dma_addr, len, DMA_DEV_TO_MEM,
 					DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
 		if (!desc_rx)
 			return -EAGAIN;
@@ -769,7 +769,7 @@ static int sh_msiof_dma_once(struct sh_msiof_spi_priv *p, const void *tx,
 		dma_sync_single_for_device(p->master->dma_tx->device->dev,
 					   p->tx_dma_addr, len, DMA_TO_DEVICE);
 		desc_tx = dmaengine_prep_slave_single(p->master->dma_tx,
-					p->tx_dma_addr, len, DMA_TO_DEVICE,
+					p->tx_dma_addr, len, DMA_MEM_TO_DEV,
 					DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
 		if (!desc_tx) {
 			ret = -EAGAIN;
diff --git a/drivers/spi/spi-sprd-adi.c b/drivers/spi/spi-sprd-adi.c
index 5993bdbf79e4..197d4b0d81af 100644
--- a/drivers/spi/spi-sprd-adi.c
+++ b/drivers/spi/spi-sprd-adi.c
@@ -4,6 +4,7 @@
  * SPDX-License-Identifier: GPL-2.0
  */
 
+#include <linux/delay.h>
 #include <linux/hwspinlock.h>
 #include <linux/init.h>
 #include <linux/io.h>
@@ -12,6 +13,7 @@
 #include <linux/of.h>
 #include <linux/of_device.h>
 #include <linux/platform_device.h>
+#include <linux/reboot.h>
 #include <linux/spi/spi.h>
 #include <linux/sizes.h>
 
@@ -67,6 +69,40 @@
 #define ADI_READ_TIMEOUT		2000
 #define REG_ADDR_LOW_MASK		GENMASK(11, 0)
 
+/* Registers definitions for PMIC watchdog controller */
+#define REG_WDG_LOAD_LOW		0x80
+#define REG_WDG_LOAD_HIGH		0x84
+#define REG_WDG_CTRL			0x88
+#define REG_WDG_LOCK			0xa0
+
+/* Bits definitions for register REG_WDG_CTRL */
+#define BIT_WDG_RUN			BIT(1)
+#define BIT_WDG_RST			BIT(3)
+
+/* Registers definitions for PMIC */
+#define PMIC_RST_STATUS			0xee8
+#define PMIC_MODULE_EN			0xc08
+#define PMIC_CLK_EN			0xc18
+#define BIT_WDG_EN			BIT(2)
+
+/* Definition of PMIC reset status register */
+#define HWRST_STATUS_RECOVERY		0x20
+#define HWRST_STATUS_NORMAL		0x40
+#define HWRST_STATUS_ALARM		0x50
+#define HWRST_STATUS_SLEEP		0x60
+#define HWRST_STATUS_FASTBOOT		0x30
+#define HWRST_STATUS_SPECIAL		0x70
+#define HWRST_STATUS_PANIC		0x80
+#define HWRST_STATUS_CFTREBOOT		0x90
+#define HWRST_STATUS_AUTODLOADER	0xa0
+#define HWRST_STATUS_IQMODE		0xb0
+#define HWRST_STATUS_SPRDISK		0xc0
+
+/* Use default timeout 50 ms that converts to watchdog values */
+#define WDG_LOAD_VAL			((50 * 1000) / 32768)
+#define WDG_LOAD_MASK			GENMASK(15, 0)
+#define WDG_UNLOCK_KEY			0xe551
+
 struct sprd_adi {
 	struct spi_controller	*ctlr;
 	struct device		*dev;
@@ -74,6 +110,7 @@ struct sprd_adi {
 	struct hwspinlock	*hwlock;
 	unsigned long		slave_vbase;
 	unsigned long		slave_pbase;
+	struct notifier_block	restart_handler;
 };
 
 static int sprd_adi_check_paddr(struct sprd_adi *sadi, u32 paddr)
@@ -123,7 +160,17 @@ static int sprd_adi_fifo_is_full(struct sprd_adi *sadi)
 static int sprd_adi_read(struct sprd_adi *sadi, u32 reg_paddr, u32 *read_val)
 {
 	int read_timeout = ADI_READ_TIMEOUT;
+	unsigned long flags;
 	u32 val, rd_addr;
+	int ret;
+
+	ret = hwspin_lock_timeout_irqsave(sadi->hwlock,
+					  ADI_HWSPINLOCK_TIMEOUT,
+					  &flags);
+	if (ret) {
+		dev_err(sadi->dev, "get the hw lock failed\n");
+		return ret;
+	}
 
 	/*
 	 * Set the physical register address need to read into RD_CMD register,
@@ -147,7 +194,8 @@ static int sprd_adi_read(struct sprd_adi *sadi, u32 reg_paddr, u32 *read_val)
 
 	if (read_timeout == 0) {
 		dev_err(sadi->dev, "ADI read timeout\n");
-		return -EBUSY;
+		ret = -EBUSY;
+		goto out;
 	}
 
 	/*
@@ -161,21 +209,35 @@ static int sprd_adi_read(struct sprd_adi *sadi, u32 reg_paddr, u32 *read_val)
 	if (rd_addr != (reg_paddr & REG_ADDR_LOW_MASK)) {
 		dev_err(sadi->dev, "read error, reg addr = 0x%x, val = 0x%x\n",
 			reg_paddr, val);
-		return -EIO;
+		ret = -EIO;
+		goto out;
 	}
 
 	*read_val = val & RD_VALUE_MASK;
-	return 0;
+
+out:
+	hwspin_unlock_irqrestore(sadi->hwlock, &flags);
+	return ret;
 }
 
-static int sprd_adi_write(struct sprd_adi *sadi, unsigned long reg, u32 val)
+static int sprd_adi_write(struct sprd_adi *sadi, u32 reg_paddr, u32 val)
 {
+	unsigned long reg = sprd_adi_to_vaddr(sadi, reg_paddr);
 	u32 timeout = ADI_FIFO_DRAIN_TIMEOUT;
+	unsigned long flags;
 	int ret;
 
+	ret = hwspin_lock_timeout_irqsave(sadi->hwlock,
+					  ADI_HWSPINLOCK_TIMEOUT,
+					  &flags);
+	if (ret) {
+		dev_err(sadi->dev, "get the hw lock failed\n");
+		return ret;
+	}
+
 	ret = sprd_adi_drain_fifo(sadi);
 	if (ret < 0)
-		return ret;
+		goto out;
 
 	/*
 	 * we should wait for write fifo is empty before writing data to PMIC
@@ -192,10 +254,12 @@ static int sprd_adi_write(struct sprd_adi *sadi, unsigned long reg, u32 val)
 
 	if (timeout == 0) {
 		dev_err(sadi->dev, "write fifo is full\n");
-		return -EBUSY;
+		ret = -EBUSY;
 	}
 
-	return 0;
+out:
+	hwspin_unlock_irqrestore(sadi->hwlock, &flags);
+	return ret;
 }
 
 static int sprd_adi_transfer_one(struct spi_controller *ctlr,
@@ -203,7 +267,6 @@ static int sprd_adi_transfer_one(struct spi_controller *ctlr,
 				 struct spi_transfer *t)
 {
 	struct sprd_adi *sadi = spi_controller_get_devdata(ctlr);
-	unsigned long flags, virt_reg;
 	u32 phy_reg, val;
 	int ret;
 
@@ -214,16 +277,7 @@ static int sprd_adi_transfer_one(struct spi_controller *ctlr,
 		if (ret)
 			return ret;
 
-		ret = hwspin_lock_timeout_irqsave(sadi->hwlock,
-						  ADI_HWSPINLOCK_TIMEOUT,
-						  &flags);
-		if (ret) {
-			dev_err(sadi->dev, "get the hw lock failed\n");
-			return ret;
-		}
-
 		ret = sprd_adi_read(sadi, phy_reg, &val);
-		hwspin_unlock_irqrestore(sadi->hwlock, &flags);
 		if (ret)
 			return ret;
 
@@ -241,19 +295,8 @@ static int sprd_adi_transfer_one(struct spi_controller *ctlr,
 		if (ret)
 			return ret;
 
-		virt_reg = sprd_adi_to_vaddr(sadi, phy_reg);
 		val = *p;
-
-		ret = hwspin_lock_timeout_irqsave(sadi->hwlock,
-						  ADI_HWSPINLOCK_TIMEOUT,
-						  &flags);
-		if (ret) {
-			dev_err(sadi->dev, "get the hw lock failed\n");
-			return ret;
-		}
-
-		ret = sprd_adi_write(sadi, virt_reg, val);
-		hwspin_unlock_irqrestore(sadi->hwlock, &flags);
+		ret = sprd_adi_write(sadi, phy_reg, val);
 		if (ret)
 			return ret;
 	} else {
@@ -264,6 +307,72 @@ static int sprd_adi_transfer_one(struct spi_controller *ctlr,
 	return 0;
 }
 
+static int sprd_adi_restart_handler(struct notifier_block *this,
+				    unsigned long mode, void *cmd)
+{
+	struct sprd_adi *sadi = container_of(this, struct sprd_adi,
+					     restart_handler);
+	u32 val, reboot_mode = 0;
+
+	if (!cmd)
+		reboot_mode = HWRST_STATUS_NORMAL;
+	else if (!strncmp(cmd, "recovery", 8))
+		reboot_mode = HWRST_STATUS_RECOVERY;
+	else if (!strncmp(cmd, "alarm", 5))
+		reboot_mode = HWRST_STATUS_ALARM;
+	else if (!strncmp(cmd, "fastsleep", 9))
+		reboot_mode = HWRST_STATUS_SLEEP;
+	else if (!strncmp(cmd, "bootloader", 10))
+		reboot_mode = HWRST_STATUS_FASTBOOT;
+	else if (!strncmp(cmd, "panic", 5))
+		reboot_mode = HWRST_STATUS_PANIC;
+	else if (!strncmp(cmd, "special", 7))
+		reboot_mode = HWRST_STATUS_SPECIAL;
+	else if (!strncmp(cmd, "cftreboot", 9))
+		reboot_mode = HWRST_STATUS_CFTREBOOT;
+	else if (!strncmp(cmd, "autodloader", 11))
+		reboot_mode = HWRST_STATUS_AUTODLOADER;
+	else if (!strncmp(cmd, "iqmode", 6))
+		reboot_mode = HWRST_STATUS_IQMODE;
+	else if (!strncmp(cmd, "sprdisk", 7))
+		reboot_mode = HWRST_STATUS_SPRDISK;
+	else
+		reboot_mode = HWRST_STATUS_NORMAL;
+
+	/* Record the reboot mode */
+	sprd_adi_read(sadi, sadi->slave_pbase + PMIC_RST_STATUS, &val);
+	val |= reboot_mode;
+	sprd_adi_write(sadi, sadi->slave_pbase + PMIC_RST_STATUS, val);
+
+	/* Enable the interface clock of the watchdog */
+	sprd_adi_read(sadi, sadi->slave_pbase + PMIC_MODULE_EN, &val);
+	val |= BIT_WDG_EN;
+	sprd_adi_write(sadi, sadi->slave_pbase + PMIC_MODULE_EN, val);
+
+	/* Enable the work clock of the watchdog */
+	sprd_adi_read(sadi, sadi->slave_pbase + PMIC_CLK_EN, &val);
+	val |= BIT_WDG_EN;
+	sprd_adi_write(sadi, sadi->slave_pbase + PMIC_CLK_EN, val);
+
+	/* Unlock the watchdog */
+	sprd_adi_write(sadi, sadi->slave_pbase + REG_WDG_LOCK, WDG_UNLOCK_KEY);
+
+	/* Load the watchdog timeout value, 50ms is always enough. */
+	sprd_adi_write(sadi, sadi->slave_pbase + REG_WDG_LOAD_LOW,
+		       WDG_LOAD_VAL & WDG_LOAD_MASK);
+	sprd_adi_write(sadi, sadi->slave_pbase + REG_WDG_LOAD_HIGH, 0);
+
+	/* Start the watchdog to reset system */
+	sprd_adi_read(sadi, sadi->slave_pbase + REG_WDG_CTRL, &val);
+	val |= BIT_WDG_RUN | BIT_WDG_RST;
+	sprd_adi_write(sadi, sadi->slave_pbase + REG_WDG_CTRL, val);
+
+	mdelay(1000);
+
+	dev_emerg(sadi->dev, "Unable to restart system\n");
+	return NOTIFY_DONE;
+}
+
 static void sprd_adi_hw_init(struct sprd_adi *sadi)
 {
 	struct device_node *np = sadi->dev->of_node;
@@ -377,6 +486,14 @@ static int sprd_adi_probe(struct platform_device *pdev)
 		goto free_hwlock;
 	}
 
+	sadi->restart_handler.notifier_call = sprd_adi_restart_handler;
+	sadi->restart_handler.priority = 128;
+	ret = register_restart_handler(&sadi->restart_handler);
+	if (ret) {
+		dev_err(&pdev->dev, "can not register restart handler\n");
+		goto free_hwlock;
+	}
+
 	return 0;
 
 free_hwlock:
@@ -391,6 +508,7 @@ static int sprd_adi_remove(struct platform_device *pdev)
 	struct spi_controller *ctlr = dev_get_drvdata(&pdev->dev);
 	struct sprd_adi *sadi = spi_controller_get_devdata(ctlr);
 
+	unregister_restart_handler(&sadi->restart_handler);
 	hwspin_lock_free(sadi->hwlock);
 	return 0;
 }
diff --git a/drivers/spi/spi-tegra20-slink.c b/drivers/spi/spi-tegra20-slink.c
index 3e12d5f87ee4..6f7b946b5ced 100644
--- a/drivers/spi/spi-tegra20-slink.c
+++ b/drivers/spi/spi-tegra20-slink.c
@@ -276,10 +276,10 @@ static unsigned tegra_slink_calculate_curr_xfer_param(
 	tspi->bytes_per_word = DIV_ROUND_UP(bits_per_word, 8);
 
 	if (bits_per_word == 8 || bits_per_word == 16) {
-		tspi->is_packed = 1;
+		tspi->is_packed = true;
 		tspi->words_per_32bit = 32/bits_per_word;
 	} else {
-		tspi->is_packed = 0;
+		tspi->is_packed = false;
 		tspi->words_per_32bit = 1;
 	}
 	tspi->packed_size = tegra_slink_get_packed_size(tspi, t);
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index b33a727a0158..7b213faa0a2b 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -779,8 +779,14 @@ static int spi_map_buf(struct spi_controller *ctlr, struct device *dev,
 	for (i = 0; i < sgs; i++) {
 
 		if (vmalloced_buf || kmap_buf) {
-			min = min_t(size_t,
-				    len, desc_len - offset_in_page(buf));
+			/*
+			 * Next scatterlist entry size is the minimum between
+			 * the desc_len and the remaining buffer length that
+			 * fits in a page.
+			 */
+			min = min_t(size_t, desc_len,
+				    min_t(size_t, len,
+					  PAGE_SIZE - offset_in_page(buf)));
 			if (vmalloced_buf)
 				vm_page = vmalloc_to_page(buf);
 			else
@@ -2254,12 +2260,6 @@ void spi_unregister_controller(struct spi_controller *ctlr)
 	mutex_lock(&board_lock);
 	found = idr_find(&spi_master_idr, id);
 	mutex_unlock(&board_lock);
-	if (found != ctlr) {
-		dev_dbg(&ctlr->dev,
-			"attempting to delete unregistered controller [%s]\n",
-			dev_name(&ctlr->dev));
-		return;
-	}
 	if (ctlr->queued) {
 		if (spi_destroy_queue(ctlr))
 			dev_err(&ctlr->dev, "queue remove failed\n");
@@ -2272,7 +2272,8 @@ void spi_unregister_controller(struct spi_controller *ctlr)
 	device_unregister(&ctlr->dev);
 	/* free bus id */
 	mutex_lock(&board_lock);
-	idr_remove(&spi_master_idr, id);
+	if (found == ctlr)
+		idr_remove(&spi_master_idr, id);
 	mutex_unlock(&board_lock);
 }
 EXPORT_SYMBOL_GPL(spi_unregister_controller);