Merge branch 'spi-5.6' into spi-next

Documentation/devicetree/bindings/spi/nuvoton,npcm-pspi.txt

@@ -12,6 +12,7 @@ Required properties:
  - clock-names: Should be "clk_apb5".
  - pinctrl-names : a pinctrl state named "default" must be defined.
  - pinctrl-0 : phandle referencing pin configuration of the device.
+ - resets : phandle to the reset control for this device.
  - cs-gpios: Specifies the gpio pins to be used for chipselects.
             See: Documentation/devicetree/bindings/spi/spi-bus.txt
 
@@ -19,16 +20,6 @@ Optional properties:
 - clock-frequency : Input clock frequency to the PSPI block in Hz.
 		    Default is 25000000 Hz.
 
-Aliases:
-- All the SPI controller nodes should be represented in the aliases node using
-  the following format 'spi{n}' withe the correct numbered in "aliases" node.
-
-Example:
-
-aliases {
-	spi0 = &spi0;
-};
-
 spi0: spi@f0200000 {
 	compatible = "nuvoton,npcm750-pspi";
 	reg = <0xf0200000 0x1000>;
@@ -39,5 +30,6 @@ spi0: spi@f0200000 {
 	interrupts = <GIC_SPI 31 IRQ_TYPE_LEVEL_HIGH>;
 	clocks = <&clk NPCM7XX_CLK_APB5>;
 	clock-names = "clk_apb5";
+	resets = <&rstc NPCM7XX_RESET_IPSRST2 NPCM7XX_RESET_PSPI1>
 	cs-gpios = <&gpio6 11 GPIO_ACTIVE_LOW>;
 };

Documentation/devicetree/bindings/spi/spi-stm32.txt

-STMicroelectronics STM32 SPI Controller
-
-The STM32 SPI controller is used to communicate with external devices using
-the Serial Peripheral Interface. It supports full-duplex, half-duplex and
-simplex synchronous serial communication with external devices. It supports
-from 4 to 32-bit data size. Although it can be configured as master or slave,
-only master is supported by the driver.
-
-Required properties:
-- compatible: Should be one of:
-  "st,stm32h7-spi"
-  "st,stm32f4-spi"
-- reg: Offset and length of the device's register set.
-- interrupts: Must contain the interrupt id.
-- clocks: Must contain an entry for spiclk (which feeds the internal clock
-	  generator).
-- #address-cells:  Number of cells required to define a chip select address.
-- #size-cells: Should be zero.
-
-Optional properties:
-- resets: Must contain the phandle to the reset controller.
-- A pinctrl state named "default" may be defined to set pins in mode of
-  operation for SPI transfer.
-- dmas: DMA specifiers for tx and rx dma. DMA fifo mode must be used. See the
-  STM32 DMA bindings, Documentation/devicetree/bindings/dma/stm32-dma.txt.
-- dma-names: DMA request names should include "tx" and "rx" if present.
-- cs-gpios: list of GPIO chip selects. See the SPI bus bindings,
-  Documentation/devicetree/bindings/spi/spi-bus.txt
-
-
-Child nodes represent devices on the SPI bus
-  See ../spi/spi-bus.txt
-
-Optional properties:
-- st,spi-midi-ns: Only for STM32H7, (Master Inter-Data Idleness) minimum time
-		  delay in nanoseconds inserted between two consecutive data
-		  frames.
-
-
-Example:
-	spi2: spi@40003800 {
-		#address-cells = <1>;
-		#size-cells = <0>;
-		compatible = "st,stm32h7-spi";
-		reg = <0x40003800 0x400>;
-		interrupts = <36>;
-		clocks = <&rcc SPI2_CK>;
-		resets = <&rcc 1166>;
-		dmas = <&dmamux1 0 39 0x400 0x01>,
-		       <&dmamux1 1 40 0x400 0x01>;
-		dma-names = "rx", "tx";
-		pinctrl-0 = <&spi2_pins_b>;
-		pinctrl-names = "default";
-		cs-gpios = <&gpioa 11 0>;
-
-		aardvark@0 {
-			compatible = "totalphase,aardvark";
-			reg = <0>;
-			spi-max-frequency = <4000000>;
-			st,spi-midi-ns = <4000>;
-		};
-	};

Documentation/devicetree/bindings/spi/spi_atmel.txt

 Atmel SPI device
 
 Required properties:
-- compatible : should be "atmel,at91rm9200-spi".
+- compatible : should be "atmel,at91rm9200-spi" or "microchip,sam9x60-spi".
 - reg: Address and length of the register set for the device
 - interrupts: Should contain spi interrupt
 - cs-gpios: chipselects (optional for SPI controller version >= 2 with the

Documentation/devicetree/bindings/spi/st,stm32-spi.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/spi/st,stm32-spi.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: STMicroelectronics STM32 SPI Controller bindings
+
+description: |
+  The STM32 SPI controller is used to communicate with external devices using
+  the Serial Peripheral Interface. It supports full-duplex, half-duplex and
+  simplex synchronous serial communication with external devices. It supports
+  from 4 to 32-bit data size.
+
+maintainers:
+  - Erwan Leray <erwan.leray@st.com>
+  - Fabrice Gasnier <fabrice.gasnier@st.com>
+
+allOf:
+  - $ref: "spi-controller.yaml#"
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: st,stm32f4-spi
+
+    then:
+      properties:
+        st,spi-midi-ns: false
+
+properties:
+  compatible:
+    enum:
+      - st,stm32f4-spi
+      - st,stm32h7-spi
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+  dmas:
+    description: |
+      DMA specifiers for tx and rx dma. DMA fifo mode must be used. See
+      the STM32 DMA bindings Documentation/devicetree/bindings/dma/stm32-dma.txt.
+    items:
+      - description: rx DMA channel
+      - description: tx DMA channel
+
+  dma-names:
+    items:
+      - const: rx
+      - const: tx
+
+patternProperties:
+  "^[a-zA-Z][a-zA-Z0-9,+\\-._]{0,63}@[0-9a-f]+$":
+    type: object
+    # SPI slave nodes must be children of the SPI master node and can
+    # contain the following properties.
+    properties:
+      st,spi-midi-ns:
+        description: |
+          Only for STM32H7, (Master Inter-Data Idleness) minimum time
+          delay in nanoseconds inserted between two consecutive data frames.
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - interrupts
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/clock/stm32mp1-clks.h>
+    #include <dt-bindings/reset/stm32mp1-resets.h>
+    spi@4000b000 {
+      #address-cells = <1>;
+      #size-cells = <0>;
+      compatible = "st,stm32h7-spi";
+      reg = <0x4000b000 0x400>;
+      interrupts = <GIC_SPI 36 IRQ_TYPE_LEVEL_HIGH>;
+      clocks = <&rcc SPI2_K>;
+      resets = <&rcc SPI2_R>;
+      dmas = <&dmamux1 0 39 0x400 0x05>,
+             <&dmamux1 1 40 0x400 0x05>;
+      dma-names = "rx", "tx";
+      cs-gpios = <&gpioa 11 0>;
+
+      aardvark@0 {
+        compatible = "totalphase,aardvark";
+        reg = <0>;
+        spi-max-frequency = <4000000>;
+        st,spi-midi-ns = <4000>;
+      };
+    };
+
+...

MAINTAINERS

@@ -7498,6 +7498,12 @@ S:	Supported
 F:	drivers/scsi/hisi_sas/
 F:	Documentation/devicetree/bindings/scsi/hisilicon-sas.txt
 
+HISILICON V3XX SPI NOR FLASH Controller Driver
+M:	John Garry <john.garry@huawei.com>
+W:	http://www.hisilicon.com
+S:	Maintained
+F:	drivers/spi/spi-hisi-sfc-v3xx.c
+
 HISILICON QM AND ZIP Controller DRIVER
 M:	Zhou Wang <wangzhou1@hisilicon.com>
 L:	linux-crypto@vger.kernel.org

drivers/spi/Kconfig

@@ -281,6 +281,15 @@ config SPI_FSL_QUADSPI
 	  This controller does not support generic SPI messages. It only
 	  supports the high-level SPI memory interface.
 
+config SPI_HISI_SFC_V3XX
+	tristate "HiSilicon SPI-NOR Flash Controller for Hi16XX chipsets"
+	depends on (ARM64 && ACPI) || COMPILE_TEST
+	depends on HAS_IOMEM
+	select CONFIG_MTD_SPI_NOR
+	help
+	  This enables support for HiSilicon v3xx SPI-NOR flash controller
+	  found in hi16xx chipsets.
+
 config SPI_NXP_FLEXSPI
 	tristate "NXP Flex SPI controller"
 	depends on ARCH_LAYERSCAPE || HAS_IOMEM

drivers/spi/Makefile

@@ -48,6 +48,7 @@ obj-$(CONFIG_SPI_FSL_LPSPI)		+= spi-fsl-lpspi.o
 obj-$(CONFIG_SPI_FSL_QUADSPI)		+= spi-fsl-qspi.o
 obj-$(CONFIG_SPI_FSL_SPI)		+= spi-fsl-spi.o
 obj-$(CONFIG_SPI_GPIO)			+= spi-gpio.o
+obj-$(CONFIG_SPI_HISI_SFC_V3XX)		+= spi-hisi-sfc-v3xx.o
 obj-$(CONFIG_SPI_IMG_SPFI)		+= spi-img-spfi.o
 obj-$(CONFIG_SPI_IMX)			+= spi-imx.o
 obj-$(CONFIG_SPI_LANTIQ_SSC)		+= spi-lantiq-ssc.o

drivers/spi/spi-atmel.c

@@ -514,26 +514,19 @@ static int atmel_spi_configure_dma(struct spi_master *master,
 	master->dma_tx = dma_request_chan(dev, "tx");
 	if (IS_ERR(master->dma_tx)) {
 		err = PTR_ERR(master->dma_tx);
-		if (err == -EPROBE_DEFER) {
-			dev_warn(dev, "no DMA channel available at the moment\n");
-			goto error_clear;
-		}
-		dev_err(dev,
-			"DMA TX channel not available, SPI unable to use DMA\n");
-		err = -EBUSY;
+		if (err != -EPROBE_DEFER)
+			dev_err(dev, "No TX DMA channel, DMA is disabled\n");
 		goto error_clear;
 	}
 
-	/*
-	 * No reason to check EPROBE_DEFER here since we have already requested
-	 * tx channel. If it fails here, it's for another reason.
-	 */
-	master->dma_rx = dma_request_slave_channel(dev, "rx");
-
-	if (!master->dma_rx) {
-		dev_err(dev,
-			"DMA RX channel not available, SPI unable to use DMA\n");
-		err = -EBUSY;
+	master->dma_rx = dma_request_chan(dev, "rx");
+	if (IS_ERR(master->dma_rx)) {
+		err = PTR_ERR(master->dma_rx);
+		/*
+		 * No reason to check EPROBE_DEFER here since we have already
+		 * requested tx channel.
+		 */
+		dev_err(dev, "No RX DMA channel, DMA is disabled\n");
 		goto error;
 	}
 
@@ -548,7 +541,7 @@ static int atmel_spi_configure_dma(struct spi_master *master,
 
 	return 0;
 error:
-	if (master->dma_rx)
+	if (!IS_ERR(master->dma_rx))
 		dma_release_channel(master->dma_rx);
 	if (!IS_ERR(master->dma_tx))
 		dma_release_channel(master->dma_tx);

drivers/spi/spi-bcm-qspi.c

@@ -1293,7 +1293,7 @@ int bcm_qspi_probe(struct platform_device *pdev,
 		name = qspi_irq_tab[val].irq_name;
 		if (qspi_irq_tab[val].irq_source == SINGLE_L2) {
 			/* get the l2 interrupts */
-			irq = platform_get_irq_byname(pdev, name);
+			irq = platform_get_irq_byname_optional(pdev, name);
 		} else if (!num_ints && soc_intc) {
 			/* all mspi, bspi intrs muxed to one L1 intr */
 			irq = platform_get_irq(pdev, 0);

drivers/spi/spi-bcm2835.c

@@ -68,7 +68,7 @@
 #define BCM2835_SPI_FIFO_SIZE		64
 #define BCM2835_SPI_FIFO_SIZE_3_4	48
 #define BCM2835_SPI_DMA_MIN_LENGTH	96
-#define BCM2835_SPI_NUM_CS		3   /* raise as necessary */
+#define BCM2835_SPI_NUM_CS		4   /* raise as necessary */
 #define BCM2835_SPI_MODE_BITS	(SPI_CPOL | SPI_CPHA | SPI_CS_HIGH \
 				| SPI_NO_CS | SPI_3WIRE)
 
@@ -888,8 +888,8 @@ static void bcm2835_dma_release(struct spi_controller *ctlr,
 	}
 }
 
-static void bcm2835_dma_init(struct spi_controller *ctlr, struct device *dev,
-			     struct bcm2835_spi *bs)
+static int bcm2835_dma_init(struct spi_controller *ctlr, struct device *dev,
+			    struct bcm2835_spi *bs)
 {
 	struct dma_slave_config slave_config;
 	const __be32 *addr;
@@ -900,19 +900,24 @@ static void bcm2835_dma_init(struct spi_controller *ctlr, struct device *dev,
 	addr = of_get_address(ctlr->dev.of_node, 0, NULL, NULL);
 	if (!addr) {
 		dev_err(dev, "could not get DMA-register address - not using dma mode\n");
-		goto err;
+		/* Fall back to interrupt mode */
+		return 0;
 	}
 	dma_reg_base = be32_to_cpup(addr);
 
 	/* get tx/rx dma */
-	ctlr->dma_tx = dma_request_slave_channel(dev, "tx");
-	if (!ctlr->dma_tx) {
+	ctlr->dma_tx = dma_request_chan(dev, "tx");
+	if (IS_ERR(ctlr->dma_tx)) {
 		dev_err(dev, "no tx-dma configuration found - not using dma mode\n");
+		ret = PTR_ERR(ctlr->dma_tx);
+		ctlr->dma_tx = NULL;
 		goto err;
 	}
-	ctlr->dma_rx = dma_request_slave_channel(dev, "rx");
-	if (!ctlr->dma_rx) {
+	ctlr->dma_rx = dma_request_chan(dev, "rx");
+	if (IS_ERR(ctlr->dma_rx)) {
 		dev_err(dev, "no rx-dma configuration found - not using dma mode\n");
+		ret = PTR_ERR(ctlr->dma_rx);
+		ctlr->dma_rx = NULL;
 		goto err_release;
 	}
 
@@ -997,7 +1002,7 @@ static void bcm2835_dma_init(struct spi_controller *ctlr, struct device *dev,
 	/* all went well, so set can_dma */
 	ctlr->can_dma = bcm2835_spi_can_dma;
 
-	return;
+	return 0;
 
 err_config:
 	dev_err(dev, "issue configuring dma: %d - not using DMA mode\n",
@@ -1005,7 +1010,14 @@ static void bcm2835_dma_init(struct spi_controller *ctlr, struct device *dev,
 err_release:
 	bcm2835_dma_release(ctlr, bs);
 err:
-	return;
+	/*
+	 * Only report error for deferred probing, otherwise fall back to
+	 * interrupt mode
+	 */
+	if (ret != -EPROBE_DEFER)
+		ret = 0;
+
+	return ret;
 }
 
 static int bcm2835_spi_transfer_one_poll(struct spi_controller *ctlr,
@@ -1305,7 +1317,10 @@ static int bcm2835_spi_probe(struct platform_device *pdev)
 	bs->clk = devm_clk_get(&pdev->dev, NULL);
 	if (IS_ERR(bs->clk)) {
 		err = PTR_ERR(bs->clk);
-		dev_err(&pdev->dev, "could not get clk: %d\n", err);
+		if (err == -EPROBE_DEFER)
+			dev_dbg(&pdev->dev, "could not get clk: %d\n", err);
+		else
+			dev_err(&pdev->dev, "could not get clk: %d\n", err);
 		goto out_controller_put;
 	}
 
@@ -1317,7 +1332,9 @@ static int bcm2835_spi_probe(struct platform_device *pdev)
 
 	clk_prepare_enable(bs->clk);
 
-	bcm2835_dma_init(ctlr, &pdev->dev, bs);
+	err = bcm2835_dma_init(ctlr, &pdev->dev, bs);
+	if (err)
+		goto out_clk_disable;
 
 	/* initialise the hardware with the default polarities */
 	bcm2835_wr(bs, BCM2835_SPI_CS,
@@ -1327,20 +1344,22 @@ static int bcm2835_spi_probe(struct platform_device *pdev)
 			       dev_name(&pdev->dev), ctlr);
 	if (err) {
 		dev_err(&pdev->dev, "could not request IRQ: %d\n", err);
-		goto out_clk_disable;
+		goto out_dma_release;
 	}
 
 	err = devm_spi_register_controller(&pdev->dev, ctlr);
 	if (err) {
 		dev_err(&pdev->dev, "could not register SPI controller: %d\n",
 			err);
-		goto out_clk_disable;
+		goto out_dma_release;
 	}
 
 	bcm2835_debugfs_create(bs, dev_name(&pdev->dev));
 
 	return 0;
 
+out_dma_release:
+	bcm2835_dma_release(ctlr, bs);
 out_clk_disable:
 	clk_disable_unprepare(bs->clk);
 out_controller_put:

drivers/spi/spi-bitbang.c

@@ -329,8 +329,20 @@ static void spi_bitbang_set_cs(struct spi_device *spi, bool enable)
 int spi_bitbang_init(struct spi_bitbang *bitbang)
 {
 	struct spi_master *master = bitbang->master;
+	bool custom_cs;
 
-	if (!master || !bitbang->chipselect)
+	if (!master)
+		return -EINVAL;
+	/*
+	 * We only need the chipselect callback if we are actually using it.
+	 * If we just use GPIO descriptors, it is surplus. If the
+	 * SPI_MASTER_GPIO_SS flag is set, we always need to call the
+	 * driver-specific chipselect routine.
+	 */
+	custom_cs = (!master->use_gpio_descriptors ||
+		     (master->flags & SPI_MASTER_GPIO_SS));
+
+	if (custom_cs && !bitbang->chipselect)
 		return -EINVAL;
 
 	mutex_init(&bitbang->lock);
@@ -344,7 +356,12 @@ int spi_bitbang_init(struct spi_bitbang *bitbang)
 	master->prepare_transfer_hardware = spi_bitbang_prepare_hardware;
 	master->unprepare_transfer_hardware = spi_bitbang_unprepare_hardware;
 	master->transfer_one = spi_bitbang_transfer_one;
-	master->set_cs = spi_bitbang_set_cs;
+	/*
+	 * When using GPIO descriptors, the ->set_cs() callback doesn't even
+	 * get called unless SPI_MASTER_GPIO_SS is set.
+	 */
+	if (custom_cs)
+		master->set_cs = spi_bitbang_set_cs;
 
 	if (!bitbang->txrx_bufs) {
 		bitbang->use_dma = 0;

drivers/spi/spi-dw.c

@@ -472,7 +472,8 @@ int dw_spi_add_host(struct device *dev, struct dw_spi *dws)
 	struct spi_controller *master;
 	int ret;
 
-	BUG_ON(dws == NULL);
+	if (!dws)
+		return -EINVAL;
 
 	master = spi_alloc_master(dev, 0);
 	if (!master)

drivers/spi/spi-fsl-dspi.c

@@ -396,17 +396,17 @@ static int dspi_request_dma(struct fsl_dspi *dspi, phys_addr_t phy_addr)
 	if (!dma)
 		return -ENOMEM;
 
-	dma->chan_rx = dma_request_slave_channel(dev, "rx");
-	if (!dma->chan_rx) {
+	dma->chan_rx = dma_request_chan(dev, "rx");
+	if (IS_ERR(dma->chan_rx)) {
 		dev_err(dev, "rx dma channel not available\n");
-		ret = -ENODEV;
+		ret = PTR_ERR(dma->chan_rx);
 		return ret;
 	}
 
-	dma->chan_tx = dma_request_slave_channel(dev, "tx");
-	if (!dma->chan_tx) {
+	dma->chan_tx = dma_request_chan(dev, "tx");
+	if (IS_ERR(dma->chan_tx)) {
 		dev_err(dev, "tx dma channel not available\n");
-		ret = -ENODEV;
+		ret = PTR_ERR(dma->chan_tx);
 		goto err_tx_channel;
 	}
 

drivers/spi/spi-fsl-lpspi.c

@@ -469,9 +469,9 @@ static int fsl_lpspi_setup_transfer(struct spi_controller *controller,
 		fsl_lpspi->watermark = fsl_lpspi->txfifosize;
 
 	if (fsl_lpspi_can_dma(controller, spi, t))
-		fsl_lpspi->usedma = 1;
+		fsl_lpspi->usedma = true;
 	else
-		fsl_lpspi->usedma = 0;
+		fsl_lpspi->usedma = false;
 
 	return fsl_lpspi_config(fsl_lpspi);
 }
@@ -862,6 +862,22 @@ static int fsl_lpspi_probe(struct platform_device *pdev)
 	fsl_lpspi->dev = &pdev->dev;
 	fsl_lpspi->is_slave = is_slave;
 
+	controller->bits_per_word_mask = SPI_BPW_RANGE_MASK(8, 32);
+	controller->transfer_one = fsl_lpspi_transfer_one;
+	controller->prepare_transfer_hardware = lpspi_prepare_xfer_hardware;
+	controller->unprepare_transfer_hardware = lpspi_unprepare_xfer_hardware;
+	controller->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH;
+	controller->flags = SPI_MASTER_MUST_RX | SPI_MASTER_MUST_TX;
+	controller->dev.of_node = pdev->dev.of_node;
+	controller->bus_num = pdev->id;
+	controller->slave_abort = fsl_lpspi_slave_abort;
+
+	ret = devm_spi_register_controller(&pdev->dev, controller);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "spi_register_controller error.\n");
+		goto out_controller_put;
+	}
+
 	if (!fsl_lpspi->is_slave) {
 		for (i = 0; i < controller->num_chipselect; i++) {
 			int cs_gpio = of_get_named_gpio(np, "cs-gpios", i);
@@ -885,16 +901,6 @@ static int fsl_lpspi_probe(struct platform_device *pdev)
 		controller->prepare_message = fsl_lpspi_prepare_message;
 	}
 
-	controller->bits_per_word_mask = SPI_BPW_RANGE_MASK(8, 32);
-	controller->transfer_one = fsl_lpspi_transfer_one;
-	controller->prepare_transfer_hardware = lpspi_prepare_xfer_hardware;
-	controller->unprepare_transfer_hardware = lpspi_unprepare_xfer_hardware;
-	controller->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH;
-	controller->flags = SPI_MASTER_MUST_RX | SPI_MASTER_MUST_TX;
-	controller->dev.of_node = pdev->dev.of_node;
-	controller->bus_num = pdev->id;
-	controller->slave_abort = fsl_lpspi_slave_abort;
-
 	init_completion(&fsl_lpspi->xfer_done);
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -952,12 +958,6 @@ static int fsl_lpspi_probe(struct platform_device *pdev)
 	if (ret < 0)
 		dev_err(&pdev->dev, "dma setup error %d, use pio\n", ret);
 
-	ret = devm_spi_register_controller(&pdev->dev, controller);
-	if (ret < 0) {
-		dev_err(&pdev->dev, "spi_register_controller error.\n");
-		goto out_controller_put;
-	}
-
 	return 0;
 
 out_controller_put:

drivers/spi/spi-fsl-spi.c

@@ -706,8 +706,8 @@ static int of_fsl_spi_probe(struct platform_device *ofdev)
 	struct device_node *np = ofdev->dev.of_node;
 	struct spi_master *master;
 	struct resource mem;
-	int irq = 0, type;
-	int ret = -ENOMEM;
+	int irq, type;
+	int ret;
 
 	ret = of_mpc8xxx_spi_probe(ofdev);
 	if (ret)
@@ -722,10 +722,8 @@ static int of_fsl_spi_probe(struct platform_device *ofdev)
 
 		if (spisel_boot) {
 			pinfo->immr_spi_cs = ioremap(get_immrbase() + IMMR_SPI_CS_OFFSET, 4);
-			if (!pinfo->immr_spi_cs) {
-				ret = -ENOMEM;
-				goto err;
-			}
+			if (!pinfo->immr_spi_cs)
+				return -ENOMEM;
 		}
 #endif
 		/*
@@ -744,24 +742,15 @@ static int of_fsl_spi_probe(struct platform_device *ofdev)
 
 	ret = of_address_to_resource(np, 0, &mem);
 	if (ret)
-		goto err;
+		return ret;
 
 	irq = platform_get_irq(ofdev, 0);
-	if (irq < 0) {
-		ret = irq;
-		goto err;
-	}
+	if (irq < 0)
+		return irq;
 
 	master = fsl_spi_probe(dev, &mem, irq);
-	if (IS_ERR(master)) {
-		ret = PTR_ERR(master);
-		goto err;
-	}
-
-	return 0;
 
-err:
-	return ret;
+	return PTR_ERR_OR_ZERO(master);
 }
 
 static int of_fsl_spi_remove(struct platform_device *ofdev)

drivers/spi/spi-hisi-sfc-v3xx.c

+// SPDX-License-Identifier: GPL-2.0-only
+//
+// HiSilicon SPI NOR V3XX Flash Controller Driver for hi16xx chipsets
+//
+// Copyright (c) 2019 HiSilicon Technologies Co., Ltd.
+// Author: John Garry <john.garry@huawei.com>
+
+#include <linux/acpi.h>
+#include <linux/bitops.h>
+#include <linux/iopoll.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/spi/spi.h>
+#include <linux/spi/spi-mem.h>
+
+#define HISI_SFC_V3XX_VERSION (0x1f8)
+
+#define HISI_SFC_V3XX_CMD_CFG (0x300)
+#define HISI_SFC_V3XX_CMD_CFG_DATA_CNT_OFF 9
+#define HISI_SFC_V3XX_CMD_CFG_RW_MSK BIT(8)
+#define HISI_SFC_V3XX_CMD_CFG_DATA_EN_MSK BIT(7)
+#define HISI_SFC_V3XX_CMD_CFG_DUMMY_CNT_OFF 4
+#define HISI_SFC_V3XX_CMD_CFG_ADDR_EN_MSK BIT(3)
+#define HISI_SFC_V3XX_CMD_CFG_CS_SEL_OFF 1
+#define HISI_SFC_V3XX_CMD_CFG_START_MSK BIT(0)
+#define HISI_SFC_V3XX_CMD_INS (0x308)
+#define HISI_SFC_V3XX_CMD_ADDR (0x30c)
+#define HISI_SFC_V3XX_CMD_DATABUF0 (0x400)
+
+struct hisi_sfc_v3xx_host {
+	struct device *dev;
+	void __iomem *regbase;
+	int max_cmd_dword;
+};
+
+#define HISI_SFC_V3XX_WAIT_TIMEOUT_US		1000000
+#define HISI_SFC_V3XX_WAIT_POLL_INTERVAL_US	10
+
+static int hisi_sfc_v3xx_wait_cmd_idle(struct hisi_sfc_v3xx_host *host)
+{
+	u32 reg;
+
+	return readl_poll_timeout(host->regbase + HISI_SFC_V3XX_CMD_CFG, reg,
+				  !(reg & HISI_SFC_V3XX_CMD_CFG_START_MSK),
+				  HISI_SFC_V3XX_WAIT_POLL_INTERVAL_US,
+				  HISI_SFC_V3XX_WAIT_TIMEOUT_US);
+}
+
+static int hisi_sfc_v3xx_adjust_op_size(struct spi_mem *mem,
+					struct spi_mem_op *op)
+{
+	struct spi_device *spi = mem->spi;
+	struct hisi_sfc_v3xx_host *host;
+	uintptr_t addr = (uintptr_t)op->data.buf.in;
+	int max_byte_count;
+
+	host = spi_controller_get_devdata(spi->master);
+
+	max_byte_count = host->max_cmd_dword * 4;
+
+	if (!IS_ALIGNED(addr, 4) && op->data.nbytes >= 4)
+		op->data.nbytes = 4 - (addr % 4);
+	else if (op->data.nbytes > max_byte_count)
+		op->data.nbytes = max_byte_count;
+
+	return 0;
+}
+
+/*
+ * memcpy_{to,from}io doesn't gurantee 32b accesses - which we require for the
+ * DATABUF registers -so use __io{read,write}32_copy when possible. For
+ * trailing bytes, copy them byte-by-byte from the DATABUF register, as we
+ * can't clobber outside the source/dest buffer.
+ *
+ * For efficient data read/write, we try to put any start 32b unaligned data
+ * into a separate transaction in hisi_sfc_v3xx_adjust_op_size().
+ */
+static void hisi_sfc_v3xx_read_databuf(struct hisi_sfc_v3xx_host *host,
+				       u8 *to, unsigned int len)
+{
+	void __iomem *from;
+	int i;
+
+	from = host->regbase + HISI_SFC_V3XX_CMD_DATABUF0;
+
+	if (IS_ALIGNED((uintptr_t)to, 4)) {
+		int words = len / 4;
+
+		__ioread32_copy(to, from, words);
+
+		len -= words * 4;
+		if (len) {
+			u32 val;
+
+			to += words * 4;
+			from += words * 4;
+
+			val = __raw_readl(from);
+
+			for (i = 0; i < len; i++, val >>= 8, to++)
+				*to = (u8)val;
+		}
+	} else {
+		for (i = 0; i < DIV_ROUND_UP(len, 4); i++, from += 4) {
+			u32 val = __raw_readl(from);
+			int j;
+
+			for (j = 0; j < 4 && (j + (i * 4) < len);
+			     to++, val >>= 8, j++)
+				*to = (u8)val;
+		}
+	}
+}
+
+static void hisi_sfc_v3xx_write_databuf(struct hisi_sfc_v3xx_host *host,
+					const u8 *from, unsigned int len)
+{
+	void __iomem *to;
+	int i;
+
+	to = host->regbase + HISI_SFC_V3XX_CMD_DATABUF0;
+
+	if (IS_ALIGNED((uintptr_t)from, 4)) {
+		int words = len / 4;
+
+		__iowrite32_copy(to, from, words);
+
+		len -= words * 4;
+		if (len) {
+			u32 val = 0;
+
+			to += words * 4;
+			from += words * 4;
+
+			for (i = 0; i < len; i++, from++)
+				val |= *from << i * 8;
+			__raw_writel(val, to);
+		}
+
+	} else {
+		for (i = 0; i < DIV_ROUND_UP(len, 4); i++, to += 4) {
+			u32 val = 0;
+			int j;
+
+			for (j = 0; j < 4 && (j + (i * 4) < len);
+			     from++, j++)
+				val |= *from << j * 8;
+			__raw_writel(val, to);
+		}
+	}
+}
+
+static int hisi_sfc_v3xx_generic_exec_op(struct hisi_sfc_v3xx_host *host,
+					 const struct spi_mem_op *op,
+					 u8 chip_select)
+{
+	int ret, len = op->data.nbytes;
+	u32 config = 0;
+
+	if (op->addr.nbytes)
+		config |= HISI_SFC_V3XX_CMD_CFG_ADDR_EN_MSK;
+
+	if (op->data.dir != SPI_MEM_NO_DATA) {
+		config |= (len - 1) << HISI_SFC_V3XX_CMD_CFG_DATA_CNT_OFF;
+		config |= HISI_SFC_V3XX_CMD_CFG_DATA_EN_MSK;
+	}
+
+	if (op->data.dir == SPI_MEM_DATA_OUT)
+		hisi_sfc_v3xx_write_databuf(host, op->data.buf.out, len);
+	else if (op->data.dir == SPI_MEM_DATA_IN)
+		config |= HISI_SFC_V3XX_CMD_CFG_RW_MSK;
+
+	config |= op->dummy.nbytes << HISI_SFC_V3XX_CMD_CFG_DUMMY_CNT_OFF |
+		  chip_select << HISI_SFC_V3XX_CMD_CFG_CS_SEL_OFF |
+		  HISI_SFC_V3XX_CMD_CFG_START_MSK;
+
+	writel(op->addr.val, host->regbase + HISI_SFC_V3XX_CMD_ADDR);
+	writel(op->cmd.opcode, host->regbase + HISI_SFC_V3XX_CMD_INS);
+
+	writel(config, host->regbase + HISI_SFC_V3XX_CMD_CFG);
+
+	ret = hisi_sfc_v3xx_wait_cmd_idle(host);
+	if (ret)
+		return ret;
+
+	if (op->data.dir == SPI_MEM_DATA_IN)
+		hisi_sfc_v3xx_read_databuf(host, op->data.buf.in, len);
+
+	return 0;
+}
+
+static int hisi_sfc_v3xx_exec_op(struct spi_mem *mem,
+				 const struct spi_mem_op *op)
+{
+	struct hisi_sfc_v3xx_host *host;
+	struct spi_device *spi = mem->spi;
+	u8 chip_select = spi->chip_select;
+
+	host = spi_controller_get_devdata(spi->master);
+
+	return hisi_sfc_v3xx_generic_exec_op(host, op, chip_select);
+}
+
+static const struct spi_controller_mem_ops hisi_sfc_v3xx_mem_ops = {
+	.adjust_op_size = hisi_sfc_v3xx_adjust_op_size,
+	.exec_op = hisi_sfc_v3xx_exec_op,
+};
+
+static int hisi_sfc_v3xx_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct hisi_sfc_v3xx_host *host;
+	struct spi_controller *ctlr;
+	u32 version;
+	int ret;
+
+	ctlr = spi_alloc_master(&pdev->dev, sizeof(*host));
+	if (!ctlr)
+		return -ENOMEM;
+
+	ctlr->mode_bits = SPI_RX_DUAL | SPI_RX_QUAD |
+			  SPI_TX_DUAL | SPI_TX_QUAD;
+
+	host = spi_controller_get_devdata(ctlr);
+	host->dev = dev;
+
+	platform_set_drvdata(pdev, host);
+
+	host->regbase = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(host->regbase)) {
+		ret = PTR_ERR(host->regbase);
+		goto err_put_master;
+	}
+
+	ctlr->bus_num = -1;
+	ctlr->num_chipselect = 1;
+	ctlr->mem_ops = &hisi_sfc_v3xx_mem_ops;
+
+	version = readl(host->regbase + HISI_SFC_V3XX_VERSION);
+
+	switch (version) {
+	case 0x351:
+		host->max_cmd_dword = 64;
+		break;
+	default:
+		host->max_cmd_dword = 16;
+		break;
+	}
+
+	ret = devm_spi_register_controller(dev, ctlr);
+	if (ret)
+		goto err_put_master;
+
+	dev_info(&pdev->dev, "hw version 0x%x\n", version);
+
+	return 0;
+
+err_put_master:
+	spi_master_put(ctlr);
+	return ret;
+}
+
+#if IS_ENABLED(CONFIG_ACPI)
+static const struct acpi_device_id hisi_sfc_v3xx_acpi_ids[] = {
+	{"HISI0341", 0},
+	{}
+};
+MODULE_DEVICE_TABLE(acpi, hisi_sfc_v3xx_acpi_ids);
+#endif
+
+static struct platform_driver hisi_sfc_v3xx_spi_driver = {
+	.driver = {
+		.name	= "hisi-sfc-v3xx",
+		.acpi_match_table = ACPI_PTR(hisi_sfc_v3xx_acpi_ids),
+	},
+	.probe	= hisi_sfc_v3xx_probe,
+};
+
+module_platform_driver(hisi_sfc_v3xx_spi_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("John Garry <john.garry@huawei.com>");
+MODULE_DESCRIPTION("HiSilicon SPI NOR V3XX Flash Controller Driver for hi16xx chipsets");

drivers/spi/spi-img-spfi.c

@@ -666,8 +666,22 @@ static int img_spfi_probe(struct platform_device *pdev)
 	master->unprepare_message = img_spfi_unprepare;
 	master->handle_err = img_spfi_handle_err;
 
-	spfi->tx_ch = dma_request_slave_channel(spfi->dev, "tx");
-	spfi->rx_ch = dma_request_slave_channel(spfi->dev, "rx");
+	spfi->tx_ch = dma_request_chan(spfi->dev, "tx");
+	if (IS_ERR(spfi->tx_ch)) {
+		ret = PTR_ERR(spfi->tx_ch);
+		spfi->tx_ch = NULL;
+		if (ret == -EPROBE_DEFER)
+			goto disable_pm;
+	}
+
+	spfi->rx_ch = dma_request_chan(spfi->dev, "rx");
+	if (IS_ERR(spfi->rx_ch)) {
+		ret = PTR_ERR(spfi->rx_ch);
+		spfi->rx_ch = NULL;
+		if (ret == -EPROBE_DEFER)
+			goto disable_pm;
+	}
+
 	if (!spfi->tx_ch || !spfi->rx_ch) {
 		if (spfi->tx_ch)
 			dma_release_channel(spfi->tx_ch);

drivers/spi/spi-imx.c

@@ -1230,9 +1230,9 @@ static int spi_imx_setupxfer(struct spi_device *spi,
 	}
 
 	if (spi_imx_can_dma(spi_imx->bitbang.master, spi, t))
-		spi_imx->usedma = 1;
+		spi_imx->usedma = true;
 	else
-		spi_imx->usedma = 0;
+		spi_imx->usedma = false;
 
 	if (is_imx53_ecspi(spi_imx) && spi_imx->slave_mode) {
 		spi_imx->rx = mx53_ecspi_rx_slave;

drivers/spi/spi-meson-spicc.c

@@ -19,7 +19,6 @@
 #include <linux/types.h>
 #include <linux/interrupt.h>
 #include <linux/reset.h>
-#include <linux/gpio.h>
 
 /*
  * The Meson SPICC controller could support DMA based transfers, but is not
@@ -467,35 +466,14 @@ static int meson_spicc_unprepare_transfer(struct spi_master *master)
 
 static int meson_spicc_setup(struct spi_device *spi)
 {
-	int ret = 0;
-
 	if (!spi->controller_state)
 		spi->controller_state = spi_master_get_devdata(spi->master);
-	else if (gpio_is_valid(spi->cs_gpio))
-		goto out_gpio;
-	else if (spi->cs_gpio == -ENOENT)
-		return 0;
-
-	if (gpio_is_valid(spi->cs_gpio)) {
-		ret = gpio_request(spi->cs_gpio, dev_name(&spi->dev));
-		if (ret) {
-			dev_err(&spi->dev, "failed to request cs gpio\n");
-			return ret;
-		}
-	}
-
-out_gpio:
-	ret = gpio_direction_output(spi->cs_gpio,
-			!(spi->mode & SPI_CS_HIGH));
 
-	return ret;
+	return 0;
 }
 
 static void meson_spicc_cleanup(struct spi_device *spi)
 {
-	if (gpio_is_valid(spi->cs_gpio))
-		gpio_free(spi->cs_gpio);
-
 	spi->controller_state = NULL;
 }
 
@@ -564,6 +542,7 @@ static int meson_spicc_probe(struct platform_device *pdev)
 	master->prepare_message = meson_spicc_prepare_message;
 	master->unprepare_transfer_hardware = meson_spicc_unprepare_transfer;
 	master->transfer_one = meson_spicc_transfer_one;
+	master->use_gpio_descriptors = true;
 
 	/* Setup max rate according to the Meson GX datasheet */
 	if ((rate >> 2) > SPICC_MAX_FREQ)

drivers/spi/spi-mxs.c

@@ -590,10 +590,10 @@ static int mxs_spi_probe(struct platform_device *pdev)
 	if (ret)
 		goto out_master_free;
 
-	ssp->dmach = dma_request_slave_channel(&pdev->dev, "rx-tx");
-	if (!ssp->dmach) {
+	ssp->dmach = dma_request_chan(&pdev->dev, "rx-tx");
+	if (IS_ERR(ssp->dmach)) {
 		dev_err(ssp->dev, "Failed to request DMA\n");
-		ret = -ENODEV;
+		ret = PTR_ERR(ssp->dmach);
 		goto out_master_free;
 	}
 

drivers/spi/spi-npcm-pspi.c

@@ -12,6 +12,7 @@
 #include <linux/spi/spi.h>
 #include <linux/gpio.h>
 #include <linux/of_gpio.h>
+#include <linux/reset.h>
 
 #include <asm/unaligned.h>
 
@@ -20,7 +21,7 @@
 
 struct npcm_pspi {
 	struct completion xfer_done;
-	struct regmap *rst_regmap;
+	struct reset_control *reset;
 	struct spi_master *master;
 	unsigned int tx_bytes;
 	unsigned int rx_bytes;
@@ -59,12 +60,6 @@ struct npcm_pspi {
 #define NPCM_PSPI_MIN_CLK_DIVIDER	4
 #define NPCM_PSPI_DEFAULT_CLK		25000000
 
-/* reset register */
-#define NPCM7XX_IPSRST2_OFFSET	0x24
-
-#define NPCM7XX_PSPI1_RESET	BIT(22)
-#define NPCM7XX_PSPI2_RESET	BIT(23)
-
 static inline unsigned int bytes_per_word(unsigned int bits)
 {
 	return bits <= 8 ? 1 : 2;
@@ -178,6 +173,13 @@ static void npcm_pspi_setup_transfer(struct spi_device *spi,
 		priv->mode = spi->mode;
 	}
 
+	/*
+	 * If transfer is even length, and 8 bits per word transfer,
+	 * then implement 16 bits-per-word transfer.
+	 */
+	if (priv->bits_per_word == 8 && !(t->len & 0x1))
+		t->bits_per_word = 16;
+
 	if (!priv->is_save_param || priv->bits_per_word != t->bits_per_word) {
 		npcm_pspi_set_transfer_size(priv, t->bits_per_word);
 		priv->bits_per_word = t->bits_per_word;
@@ -286,9 +288,9 @@ static int npcm_pspi_unprepare_transfer_hardware(struct spi_master *master)
 
 static void npcm_pspi_reset_hw(struct npcm_pspi *priv)
 {
-	regmap_write(priv->rst_regmap, NPCM7XX_IPSRST2_OFFSET,
-		     NPCM7XX_PSPI1_RESET << priv->id);
-	regmap_write(priv->rst_regmap, NPCM7XX_IPSRST2_OFFSET, 0x0);
+	reset_control_assert(priv->reset);
+	udelay(5);
+	reset_control_deassert(priv->reset);
 }
 
 static irqreturn_t npcm_pspi_handler(int irq, void *dev_id)
@@ -352,10 +354,6 @@ static int npcm_pspi_probe(struct platform_device *pdev)
 	if (num_cs < 0)
 		return num_cs;
 
-	pdev->id = of_alias_get_id(np, "spi");
-	if (pdev->id < 0)
-		pdev->id = 0;
-
 	master = spi_alloc_master(&pdev->dev, sizeof(*priv));
 	if (!master)
 		return -ENOMEM;
@@ -365,7 +363,6 @@ static int npcm_pspi_probe(struct platform_device *pdev)
 	priv = spi_master_get_devdata(master);
 	priv->master = master;
 	priv->is_save_param = false;
-	priv->id = pdev->id;
 
 	priv->base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(priv->base)) {
@@ -390,11 +387,10 @@ static int npcm_pspi_probe(struct platform_device *pdev)
 		goto out_disable_clk;
 	}
 
-	priv->rst_regmap =
-		syscon_regmap_lookup_by_compatible("nuvoton,npcm750-rst");
-	if (IS_ERR(priv->rst_regmap)) {
-		dev_err(&pdev->dev, "failed to find nuvoton,npcm750-rst\n");
-		return PTR_ERR(priv->rst_regmap);
+	priv->reset = devm_reset_control_get(&pdev->dev, NULL);
+	if (IS_ERR(priv->reset)) {
+		ret = PTR_ERR(priv->reset);
+		goto out_disable_clk;
 	}
 
 	/* reset SPI-HW block */
@@ -415,7 +411,7 @@ static int npcm_pspi_probe(struct platform_device *pdev)
 	master->min_speed_hz = DIV_ROUND_UP(clk_hz, NPCM_PSPI_MAX_CLK_DIVIDER);
 	master->mode_bits = SPI_CPHA | SPI_CPOL;
 	master->dev.of_node = pdev->dev.of_node;
-	master->bus_num = pdev->id;
+	master->bus_num = -1;
 	master->bits_per_word_mask = SPI_BPW_MASK(8) | SPI_BPW_MASK(16);
 	master->transfer_one = npcm_pspi_transfer_one;
 	master->prepare_transfer_hardware =
@@ -448,7 +444,7 @@ static int npcm_pspi_probe(struct platform_device *pdev)
 	if (ret)
 		goto out_disable_clk;
 
-	pr_info("NPCM Peripheral SPI %d probed\n", pdev->id);
+	pr_info("NPCM Peripheral SPI %d probed\n", master->bus_num);
 
 	return 0;
 

drivers/spi/spi-oc-tiny.c

@@ -20,7 +20,6 @@
 #include <linux/spi/spi_bitbang.h>
 #include <linux/spi/spi_oc_tiny.h>
 #include <linux/io.h>
-#include <linux/gpio.h>
 #include <linux/of.h>
 
 #define DRV_NAME "spi_oc_tiny"
@@ -50,8 +49,6 @@ struct tiny_spi {
 	unsigned int txc, rxc;
 	const u8 *txp;
 	u8 *rxp;
-	int gpio_cs_count;
-	int *gpio_cs;
 };
 
 static inline struct tiny_spi *tiny_spi_to_hw(struct spi_device *sdev)
@@ -66,16 +63,6 @@ static unsigned int tiny_spi_baud(struct spi_device *spi, unsigned int hz)
 	return min(DIV_ROUND_UP(hw->freq, hz * 2), (1U << hw->baudwidth)) - 1;
 }
 
-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 > 0) {
-		gpio_set_value(hw->gpio_cs[spi->chip_select],
-			(spi->mode & SPI_CS_HIGH) ? is_active : !is_active);
-	}
-}
-
 static int tiny_spi_setup_transfer(struct spi_device *spi,
 				   struct spi_transfer *t)
 {
@@ -203,24 +190,10 @@ static int tiny_spi_of_probe(struct platform_device *pdev)
 {
 	struct tiny_spi *hw = platform_get_drvdata(pdev);
 	struct device_node *np = pdev->dev.of_node;
-	unsigned int i;
 	u32 val;
 
 	if (!np)
 		return 0;
-	hw->gpio_cs_count = of_gpio_count(np);
-	if (hw->gpio_cs_count > 0) {
-		hw->gpio_cs = devm_kcalloc(&pdev->dev,
-				hw->gpio_cs_count, sizeof(unsigned int),
-				GFP_KERNEL);
-		if (!hw->gpio_cs)
-			return -ENOMEM;
-	}
-	for (i = 0; i < hw->gpio_cs_count; i++) {
-		hw->gpio_cs[i] = of_get_gpio_flags(np, i, NULL);
-		if (hw->gpio_cs[i] < 0)
-			return -ENODEV;
-	}
 	hw->bitbang.master->dev.of_node = pdev->dev.of_node;
 	if (!of_property_read_u32(np, "clock-frequency", &val))
 		hw->freq = val;
@@ -240,7 +213,6 @@ static int tiny_spi_probe(struct platform_device *pdev)
 	struct tiny_spi_platform_data *platp = dev_get_platdata(&pdev->dev);
 	struct tiny_spi *hw;
 	struct spi_master *master;
-	unsigned int i;
 	int err = -ENODEV;
 
 	master = spi_alloc_master(&pdev->dev, sizeof(struct tiny_spi));
@@ -249,9 +221,9 @@ static int tiny_spi_probe(struct platform_device *pdev)
 
 	/* setup the master state. */
 	master->bus_num = pdev->id;
-	master->num_chipselect = 255;
 	master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH;
 	master->setup = tiny_spi_setup;
+	master->use_gpio_descriptors = true;
 
 	hw = spi_master_get_devdata(master);
 	platform_set_drvdata(pdev, hw);
@@ -259,7 +231,6 @@ static int tiny_spi_probe(struct platform_device *pdev)
 	/* setup the state for the bitbang driver */
 	hw->bitbang.master = master;
 	hw->bitbang.setup_transfer = tiny_spi_setup_transfer;
-	hw->bitbang.chipselect = tiny_spi_chipselect;
 	hw->bitbang.txrx_bufs = tiny_spi_txrx_bufs;
 
 	/* find and map our resources */
@@ -279,12 +250,6 @@ static int tiny_spi_probe(struct platform_device *pdev)
 	}
 	/* find platform data */
 	if (platp) {
-		hw->gpio_cs_count = platp->gpio_cs_count;
-		hw->gpio_cs = platp->gpio_cs;
-		if (platp->gpio_cs_count && !platp->gpio_cs) {
-			err = -EBUSY;
-			goto exit;
-		}
 		hw->freq = platp->freq;
 		hw->baudwidth = platp->baudwidth;
 	} else {
@@ -292,13 +257,6 @@ static int tiny_spi_probe(struct platform_device *pdev)
 		if (err)
 			goto exit;
 	}
-	for (i = 0; i < hw->gpio_cs_count; i++) {
-		err = gpio_request(hw->gpio_cs[i], dev_name(&pdev->dev));
-		if (err)
-			goto exit_gpio;
-		gpio_direction_output(hw->gpio_cs[i], 1);
-	}
-	hw->bitbang.master->num_chipselect = max(1, hw->gpio_cs_count);
 
 	/* register our spi controller */
 	err = spi_bitbang_start(&hw->bitbang);
@@ -308,9 +266,6 @@ static int tiny_spi_probe(struct platform_device *pdev)
 
 	return 0;
 
-exit_gpio:
-	while (i-- > 0)
-		gpio_free(hw->gpio_cs[i]);
 exit:
 	spi_master_put(master);
 	return err;
@@ -320,11 +275,8 @@ static int tiny_spi_remove(struct platform_device *pdev)
 {
 	struct tiny_spi *hw = platform_get_drvdata(pdev);
 	struct spi_master *master = hw->bitbang.master;
-	unsigned int i;
 
 	spi_bitbang_stop(&hw->bitbang);
-	for (i = 0; i < hw->gpio_cs_count; i++)
-		gpio_free(hw->gpio_cs[i]);
 	spi_master_put(master);
 	return 0;
 }

drivers/spi/spi-qcom-qspi.c

@@ -137,7 +137,7 @@ enum qspi_clocks {
 struct qcom_qspi {
 	void __iomem *base;
 	struct device *dev;
-	struct clk_bulk_data clks[QSPI_NUM_CLKS];
+	struct clk_bulk_data *clks;
 	struct qspi_xfer xfer;
 	/* Lock to protect xfer and IRQ accessed registers */
 	spinlock_t lock;
@@ -445,6 +445,13 @@ static int qcom_qspi_probe(struct platform_device *pdev)
 		goto exit_probe_master_put;
 	}
 
+	ctrl->clks = devm_kcalloc(dev, QSPI_NUM_CLKS,
+				  sizeof(*ctrl->clks), GFP_KERNEL);
+	if (!ctrl->clks) {
+		ret = -ENOMEM;
+		goto exit_probe_master_put;
+	}
+
 	ctrl->clks[QSPI_CLK_CORE].id = "core";
 	ctrl->clks[QSPI_CLK_IFACE].id = "iface";
 	ret = devm_clk_bulk_get(dev, QSPI_NUM_CLKS, ctrl->clks);

drivers/spi/spi-rspi.c

@@ -159,7 +159,7 @@
 #define SPCMD_SPIMOD_DUAL	SPCMD_SPIMOD0
 #define SPCMD_SPIMOD_QUAD	SPCMD_SPIMOD1
 #define SPCMD_SPRW		0x0010	/* SPI Read/Write Access (Dual/Quad) */
-#define SPCMD_SSLA_MASK		0x0030	/* SSL Assert Signal Setting (RSPI) */
+#define SPCMD_SSLA(i)		((i) << 4)	/* SSL Assert Signal Setting */
 #define SPCMD_BRDV_MASK		0x000c	/* Bit Rate Division Setting */
 #define SPCMD_CPOL		0x0002	/* Clock Polarity Setting */
 #define SPCMD_CPHA		0x0001	/* Clock Phase Setting */
@@ -242,6 +242,7 @@ struct spi_ops {
 	u16 mode_bits;
 	u16 flags;
 	u16 fifo_size;
+	u8 num_hw_ss;
 };
 
 /*
@@ -426,8 +427,6 @@ static int qspi_set_receive_trigger(struct rspi_data *rspi, unsigned int len)
 	return n;
 }
 
-#define set_config_register(spi, n) spi->ops->set_config_register(spi, n)
-
 static void rspi_enable_irq(const struct rspi_data *rspi, u8 enable)
 {
 	rspi_write8(rspi, rspi_read8(rspi, RSPI_SPCR) | enable, RSPI_SPCR);
@@ -620,9 +619,8 @@ static int rspi_dma_transfer(struct rspi_data *rspi, struct sg_table *tx,
 		dmaengine_terminate_all(rspi->ctlr->dma_rx);
 no_dma_rx:
 	if (ret == -EAGAIN) {
-		pr_warn_once("%s %s: DMA not available, falling back to PIO\n",
-			     dev_driver_string(&rspi->ctlr->dev),
-			     dev_name(&rspi->ctlr->dev));
+		dev_warn_once(&rspi->ctlr->dev,
+			      "DMA not available, falling back to PIO\n");
 	}
 	return ret;
 }
@@ -936,12 +934,16 @@ static int rspi_prepare_message(struct spi_controller *ctlr,
 	if (spi->mode & SPI_CPHA)
 		rspi->spcmd |= SPCMD_CPHA;
 
+	/* Configure slave signal to assert */
+	rspi->spcmd |= SPCMD_SSLA(spi->cs_gpiod ? rspi->ctlr->unused_native_cs
+						: spi->chip_select);
+
 	/* CMOS output mode and MOSI signal from previous transfer */
 	rspi->sppcr = 0;
 	if (spi->mode & SPI_LOOP)
 		rspi->sppcr |= SPPCR_SPLP;
 
-	set_config_register(rspi, 8);
+	rspi->ops->set_config_register(rspi, 8);
 
 	if (msg->spi->mode &
 	    (SPI_TX_DUAL | SPI_TX_QUAD | SPI_RX_DUAL | SPI_RX_QUAD)) {
@@ -1123,6 +1125,7 @@ static const struct spi_ops rspi_ops = {
 	.mode_bits =		SPI_CPHA | SPI_CPOL | SPI_LOOP,
 	.flags =		SPI_CONTROLLER_MUST_TX,
 	.fifo_size =		8,
+	.num_hw_ss =		2,
 };
 
 static const struct spi_ops rspi_rz_ops = {
@@ -1131,6 +1134,7 @@ static const struct spi_ops rspi_rz_ops = {
 	.mode_bits =		SPI_CPHA | SPI_CPOL | SPI_LOOP,
 	.flags =		SPI_CONTROLLER_MUST_RX | SPI_CONTROLLER_MUST_TX,
 	.fifo_size =		8,	/* 8 for TX, 32 for RX */
+	.num_hw_ss =		1,
 };
 
 static const struct spi_ops qspi_ops = {
@@ -1141,6 +1145,7 @@ static const struct spi_ops qspi_ops = {
 				SPI_RX_DUAL | SPI_RX_QUAD,
 	.flags =		SPI_CONTROLLER_MUST_RX | SPI_CONTROLLER_MUST_TX,
 	.fifo_size =		32,
+	.num_hw_ss =		1,
 };
 
 #ifdef CONFIG_OF
@@ -1256,6 +1261,8 @@ static int rspi_probe(struct platform_device *pdev)
 	ctlr->mode_bits = ops->mode_bits;
 	ctlr->flags = ops->flags;
 	ctlr->dev.of_node = pdev->dev.of_node;
+	ctlr->use_gpio_descriptors = true;
+	ctlr->max_native_cs = rspi->ops->num_hw_ss;
 
 	ret = platform_get_irq_byname_optional(pdev, "rx");
 	if (ret < 0) {
@@ -1314,8 +1321,6 @@ static int rspi_probe(struct platform_device *pdev)
 
 static const struct platform_device_id spi_driver_ids[] = {
 	{ "rspi",	(kernel_ulong_t)&rspi_ops },
-	{ "rspi-rz",	(kernel_ulong_t)&rspi_rz_ops },
-	{ "qspi",	(kernel_ulong_t)&qspi_ops },
 	{},
 };
 

drivers/spi/spi-sh-msiof.c

@@ -14,8 +14,6 @@
 #include <linux/dma-mapping.h>
 #include <linux/dmaengine.h>
 #include <linux/err.h>
-#include <linux/gpio.h>
-#include <linux/gpio/consumer.h>
 #include <linux/interrupt.h>
 #include <linux/io.h>
 #include <linux/iopoll.h>
@@ -55,7 +53,6 @@ struct sh_msiof_spi_priv {
 	void *rx_dma_page;
 	dma_addr_t tx_dma_addr;
 	dma_addr_t rx_dma_addr;
-	unsigned short unused_ss;
 	bool native_cs_inited;
 	bool native_cs_high;
 	bool slave_aborted;
@@ -63,140 +60,140 @@ struct sh_msiof_spi_priv {
 
 #define MAX_SS	3	/* Maximum number of native chip selects */
 
-#define TMDR1	0x00	/* Transmit Mode Register 1 */
-#define TMDR2	0x04	/* Transmit Mode Register 2 */
-#define TMDR3	0x08	/* Transmit Mode Register 3 */
-#define RMDR1	0x10	/* Receive Mode Register 1 */
-#define RMDR2	0x14	/* Receive Mode Register 2 */
-#define RMDR3	0x18	/* Receive Mode Register 3 */
-#define TSCR	0x20	/* Transmit Clock Select Register */
-#define RSCR	0x22	/* Receive Clock Select Register (SH, A1, APE6) */
-#define CTR	0x28	/* Control Register */
-#define FCTR	0x30	/* FIFO Control Register */
-#define STR	0x40	/* Status Register */
-#define IER	0x44	/* Interrupt Enable Register */
-#define TDR1	0x48	/* Transmit Control Data Register 1 (SH, A1) */
-#define TDR2	0x4c	/* Transmit Control Data Register 2 (SH, A1) */
-#define TFDR	0x50	/* Transmit FIFO Data Register */
-#define RDR1	0x58	/* Receive Control Data Register 1 (SH, A1) */
-#define RDR2	0x5c	/* Receive Control Data Register 2 (SH, A1) */
-#define RFDR	0x60	/* Receive FIFO Data Register */
-
-/* TMDR1 and RMDR1 */
-#define MDR1_TRMD	   BIT(31)  /* Transfer Mode (1 = Master mode) */
-#define MDR1_SYNCMD_MASK   GENMASK(29, 28) /* SYNC Mode */
-#define MDR1_SYNCMD_SPI	   (2 << 28)/*   Level mode/SPI */
-#define MDR1_SYNCMD_LR	   (3 << 28)/*   L/R mode */
-#define MDR1_SYNCAC_SHIFT  25       /* Sync Polarity (1 = Active-low) */
-#define MDR1_BITLSB_SHIFT  24       /* MSB/LSB First (1 = LSB first) */
-#define MDR1_DTDL_SHIFT	   20       /* Data Pin Bit Delay for MSIOF_SYNC */
-#define MDR1_SYNCDL_SHIFT  16       /* Frame Sync Signal Timing Delay */
-#define MDR1_FLD_MASK	   GENMASK(3, 2) /* Frame Sync Signal Interval (0-3) */
-#define MDR1_FLD_SHIFT	   2
-#define MDR1_XXSTP	   BIT(0)   /* Transmission/Reception Stop on FIFO */
-/* TMDR1 */
-#define TMDR1_PCON	   BIT(30)  /* Transfer Signal Connection */
-#define TMDR1_SYNCCH_MASK  GENMASK(27, 26) /* Sync Signal Channel Select */
-#define TMDR1_SYNCCH_SHIFT 26       /* 0=MSIOF_SYNC, 1=MSIOF_SS1, 2=MSIOF_SS2 */
-
-/* TMDR2 and RMDR2 */
-#define MDR2_BITLEN1(i)	(((i) - 1) << 24) /* Data Size (8-32 bits) */
-#define MDR2_WDLEN1(i)	(((i) - 1) << 16) /* Word Count (1-64/256 (SH, A1))) */
-#define MDR2_GRPMASK1	BIT(0)      /* Group Output Mask 1 (SH, A1) */
-
-/* TSCR and RSCR */
-#define SCR_BRPS_MASK	GENMASK(12, 8) /* Prescaler Setting (1-32) */
-#define SCR_BRPS(i)	(((i) - 1) << 8)
-#define SCR_BRDV_MASK	GENMASK(2, 0) /* Baud Rate Generator's Division Ratio */
-#define SCR_BRDV_DIV_2	0
-#define SCR_BRDV_DIV_4	1
-#define SCR_BRDV_DIV_8	2
-#define SCR_BRDV_DIV_16	3
-#define SCR_BRDV_DIV_32	4
-#define SCR_BRDV_DIV_1	7
-
-/* CTR */
-#define CTR_TSCKIZ_MASK	GENMASK(31, 30) /* Transmit Clock I/O Polarity Select */
-#define CTR_TSCKIZ_SCK	BIT(31)   /*   Disable SCK when TX disabled */
-#define CTR_TSCKIZ_POL_SHIFT 30   /*   Transmit Clock Polarity */
-#define CTR_RSCKIZ_MASK	GENMASK(29, 28) /* Receive Clock Polarity Select */
-#define CTR_RSCKIZ_SCK	BIT(29)   /*   Must match CTR_TSCKIZ_SCK */
-#define CTR_RSCKIZ_POL_SHIFT 28   /*   Receive Clock Polarity */
-#define CTR_TEDG_SHIFT	     27   /* Transmit Timing (1 = falling edge) */
-#define CTR_REDG_SHIFT	     26   /* Receive Timing (1 = falling edge) */
-#define CTR_TXDIZ_MASK	GENMASK(23, 22) /* Pin Output When TX is Disabled */
-#define CTR_TXDIZ_LOW	(0 << 22) /*   0 */
-#define CTR_TXDIZ_HIGH	(1 << 22) /*   1 */
-#define CTR_TXDIZ_HIZ	(2 << 22) /*   High-impedance */
-#define CTR_TSCKE	BIT(15)   /* Transmit Serial Clock Output Enable */
-#define CTR_TFSE	BIT(14)   /* Transmit Frame Sync Signal Output Enable */
-#define CTR_TXE		BIT(9)    /* Transmit Enable */
-#define CTR_RXE		BIT(8)    /* Receive Enable */
-#define CTR_TXRST	BIT(1)    /* Transmit Reset */
-#define CTR_RXRST	BIT(0)    /* Receive Reset */
-
-/* FCTR */
-#define FCTR_TFWM_MASK	GENMASK(31, 29) /* Transmit FIFO Watermark */
-#define FCTR_TFWM_64	(0 << 29) /*  Transfer Request when 64 empty stages */
-#define FCTR_TFWM_32	(1 << 29) /*  Transfer Request when 32 empty stages */
-#define FCTR_TFWM_24	(2 << 29) /*  Transfer Request when 24 empty stages */
-#define FCTR_TFWM_16	(3 << 29) /*  Transfer Request when 16 empty stages */
-#define FCTR_TFWM_12	(4 << 29) /*  Transfer Request when 12 empty stages */
-#define FCTR_TFWM_8	(5 << 29) /*  Transfer Request when 8 empty stages */
-#define FCTR_TFWM_4	(6 << 29) /*  Transfer Request when 4 empty stages */
-#define FCTR_TFWM_1	(7 << 29) /*  Transfer Request when 1 empty stage */
-#define FCTR_TFUA_MASK	GENMASK(26, 20) /* Transmit FIFO Usable Area */
-#define FCTR_TFUA_SHIFT	20
-#define FCTR_TFUA(i)	((i) << FCTR_TFUA_SHIFT)
-#define FCTR_RFWM_MASK	GENMASK(15, 13) /* Receive FIFO Watermark */
-#define FCTR_RFWM_1	(0 << 13) /*  Transfer Request when 1 valid stages */
-#define FCTR_RFWM_4	(1 << 13) /*  Transfer Request when 4 valid stages */
-#define FCTR_RFWM_8	(2 << 13) /*  Transfer Request when 8 valid stages */
-#define FCTR_RFWM_16	(3 << 13) /*  Transfer Request when 16 valid stages */
-#define FCTR_RFWM_32	(4 << 13) /*  Transfer Request when 32 valid stages */
-#define FCTR_RFWM_64	(5 << 13) /*  Transfer Request when 64 valid stages */
-#define FCTR_RFWM_128	(6 << 13) /*  Transfer Request when 128 valid stages */
-#define FCTR_RFWM_256	(7 << 13) /*  Transfer Request when 256 valid stages */
-#define FCTR_RFUA_MASK	GENMASK(12, 4) /* Receive FIFO Usable Area (0x40 = full) */
-#define FCTR_RFUA_SHIFT	4
-#define FCTR_RFUA(i)	((i) << FCTR_RFUA_SHIFT)
-
-/* STR */
-#define STR_TFEMP	BIT(29) /* Transmit FIFO Empty */
-#define STR_TDREQ	BIT(28) /* Transmit Data Transfer Request */
-#define STR_TEOF	BIT(23) /* Frame Transmission End */
-#define STR_TFSERR	BIT(21) /* Transmit Frame Synchronization Error */
-#define STR_TFOVF	BIT(20) /* Transmit FIFO Overflow */
-#define STR_TFUDF	BIT(19) /* Transmit FIFO Underflow */
-#define STR_RFFUL	BIT(13) /* Receive FIFO Full */
-#define STR_RDREQ	BIT(12) /* Receive Data Transfer Request */
-#define STR_REOF	BIT(7)  /* Frame Reception End */
-#define STR_RFSERR	BIT(5)  /* Receive Frame Synchronization Error */
-#define STR_RFUDF	BIT(4)  /* Receive FIFO Underflow */
-#define STR_RFOVF	BIT(3)  /* Receive FIFO Overflow */
-
-/* IER */
-#define IER_TDMAE	BIT(31) /* Transmit Data DMA Transfer Req. Enable */
-#define IER_TFEMPE	BIT(29) /* Transmit FIFO Empty Enable */
-#define IER_TDREQE	BIT(28) /* Transmit Data Transfer Request Enable */
-#define IER_TEOFE	BIT(23) /* Frame Transmission End Enable */
-#define IER_TFSERRE	BIT(21) /* Transmit Frame Sync Error Enable */
-#define IER_TFOVFE	BIT(20) /* Transmit FIFO Overflow Enable */
-#define IER_TFUDFE	BIT(19) /* Transmit FIFO Underflow Enable */
-#define IER_RDMAE	BIT(15) /* Receive Data DMA Transfer Req. Enable */
-#define IER_RFFULE	BIT(13) /* Receive FIFO Full Enable */
-#define IER_RDREQE	BIT(12) /* Receive Data Transfer Request Enable */
-#define IER_REOFE	BIT(7)  /* Frame Reception End Enable */
-#define IER_RFSERRE	BIT(5)  /* Receive Frame Sync Error Enable */
-#define IER_RFUDFE	BIT(4)  /* Receive FIFO Underflow Enable */
-#define IER_RFOVFE	BIT(3)  /* Receive FIFO Overflow Enable */
+#define SITMDR1	0x00	/* Transmit Mode Register 1 */
+#define SITMDR2	0x04	/* Transmit Mode Register 2 */
+#define SITMDR3	0x08	/* Transmit Mode Register 3 */
+#define SIRMDR1	0x10	/* Receive Mode Register 1 */
+#define SIRMDR2	0x14	/* Receive Mode Register 2 */
+#define SIRMDR3	0x18	/* Receive Mode Register 3 */
+#define SITSCR	0x20	/* Transmit Clock Select Register */
+#define SIRSCR	0x22	/* Receive Clock Select Register (SH, A1, APE6) */
+#define SICTR	0x28	/* Control Register */
+#define SIFCTR	0x30	/* FIFO Control Register */
+#define SISTR	0x40	/* Status Register */
+#define SIIER	0x44	/* Interrupt Enable Register */
+#define SITDR1	0x48	/* Transmit Control Data Register 1 (SH, A1) */
+#define SITDR2	0x4c	/* Transmit Control Data Register 2 (SH, A1) */
+#define SITFDR	0x50	/* Transmit FIFO Data Register */
+#define SIRDR1	0x58	/* Receive Control Data Register 1 (SH, A1) */
+#define SIRDR2	0x5c	/* Receive Control Data Register 2 (SH, A1) */
+#define SIRFDR	0x60	/* Receive FIFO Data Register */
+
+/* SITMDR1 and SIRMDR1 */
+#define SIMDR1_TRMD		BIT(31)		/* Transfer Mode (1 = Master mode) */
+#define SIMDR1_SYNCMD_MASK	GENMASK(29, 28)	/* SYNC Mode */
+#define SIMDR1_SYNCMD_SPI	(2 << 28)	/*   Level mode/SPI */
+#define SIMDR1_SYNCMD_LR	(3 << 28)	/*   L/R mode */
+#define SIMDR1_SYNCAC_SHIFT	25		/* Sync Polarity (1 = Active-low) */
+#define SIMDR1_BITLSB_SHIFT	24		/* MSB/LSB First (1 = LSB first) */
+#define SIMDR1_DTDL_SHIFT	20		/* Data Pin Bit Delay for MSIOF_SYNC */
+#define SIMDR1_SYNCDL_SHIFT	16		/* Frame Sync Signal Timing Delay */
+#define SIMDR1_FLD_MASK		GENMASK(3, 2)	/* Frame Sync Signal Interval (0-3) */
+#define SIMDR1_FLD_SHIFT	2
+#define SIMDR1_XXSTP		BIT(0)		/* Transmission/Reception Stop on FIFO */
+/* SITMDR1 */
+#define SITMDR1_PCON		BIT(30)		/* Transfer Signal Connection */
+#define SITMDR1_SYNCCH_MASK	GENMASK(27, 26)	/* Sync Signal Channel Select */
+#define SITMDR1_SYNCCH_SHIFT	26		/* 0=MSIOF_SYNC, 1=MSIOF_SS1, 2=MSIOF_SS2 */
+
+/* SITMDR2 and SIRMDR2 */
+#define SIMDR2_BITLEN1(i)	(((i) - 1) << 24) /* Data Size (8-32 bits) */
+#define SIMDR2_WDLEN1(i)	(((i) - 1) << 16) /* Word Count (1-64/256 (SH, A1))) */
+#define SIMDR2_GRPMASK1		BIT(0)		/* Group Output Mask 1 (SH, A1) */
+
+/* SITSCR and SIRSCR */
+#define SISCR_BRPS_MASK		GENMASK(12, 8)	/* Prescaler Setting (1-32) */
+#define SISCR_BRPS(i)		(((i) - 1) << 8)
+#define SISCR_BRDV_MASK		GENMASK(2, 0)	/* Baud Rate Generator's Division Ratio */
+#define SISCR_BRDV_DIV_2	0
+#define SISCR_BRDV_DIV_4	1
+#define SISCR_BRDV_DIV_8	2
+#define SISCR_BRDV_DIV_16	3
+#define SISCR_BRDV_DIV_32	4
+#define SISCR_BRDV_DIV_1	7
+
+/* SICTR */
+#define SICTR_TSCKIZ_MASK	GENMASK(31, 30)	/* Transmit Clock I/O Polarity Select */
+#define SICTR_TSCKIZ_SCK	BIT(31)		/*   Disable SCK when TX disabled */
+#define SICTR_TSCKIZ_POL_SHIFT	30		/*   Transmit Clock Polarity */
+#define SICTR_RSCKIZ_MASK	GENMASK(29, 28) /* Receive Clock Polarity Select */
+#define SICTR_RSCKIZ_SCK	BIT(29)		/*   Must match CTR_TSCKIZ_SCK */
+#define SICTR_RSCKIZ_POL_SHIFT	28		/*   Receive Clock Polarity */
+#define SICTR_TEDG_SHIFT	27		/* Transmit Timing (1 = falling edge) */
+#define SICTR_REDG_SHIFT	26		/* Receive Timing (1 = falling edge) */
+#define SICTR_TXDIZ_MASK	GENMASK(23, 22)	/* Pin Output When TX is Disabled */
+#define SICTR_TXDIZ_LOW		(0 << 22)	/*   0 */
+#define SICTR_TXDIZ_HIGH	(1 << 22)	/*   1 */
+#define SICTR_TXDIZ_HIZ		(2 << 22)	/*   High-impedance */
+#define SICTR_TSCKE		BIT(15)		/* Transmit Serial Clock Output Enable */
+#define SICTR_TFSE		BIT(14)		/* Transmit Frame Sync Signal Output Enable */
+#define SICTR_TXE		BIT(9)		/* Transmit Enable */
+#define SICTR_RXE		BIT(8)		/* Receive Enable */
+#define SICTR_TXRST		BIT(1)		/* Transmit Reset */
+#define SICTR_RXRST		BIT(0)		/* Receive Reset */
+
+/* SIFCTR */
+#define SIFCTR_TFWM_MASK	GENMASK(31, 29)	/* Transmit FIFO Watermark */
+#define SIFCTR_TFWM_64		(0 << 29)	/*  Transfer Request when 64 empty stages */
+#define SIFCTR_TFWM_32		(1 << 29)	/*  Transfer Request when 32 empty stages */
+#define SIFCTR_TFWM_24		(2 << 29)	/*  Transfer Request when 24 empty stages */
+#define SIFCTR_TFWM_16		(3 << 29)	/*  Transfer Request when 16 empty stages */
+#define SIFCTR_TFWM_12		(4 << 29)	/*  Transfer Request when 12 empty stages */
+#define SIFCTR_TFWM_8		(5 << 29)	/*  Transfer Request when 8 empty stages */
+#define SIFCTR_TFWM_4		(6 << 29)	/*  Transfer Request when 4 empty stages */
+#define SIFCTR_TFWM_1		(7 << 29)	/*  Transfer Request when 1 empty stage */
+#define SIFCTR_TFUA_MASK	GENMASK(26, 20) /* Transmit FIFO Usable Area */
+#define SIFCTR_TFUA_SHIFT	20
+#define SIFCTR_TFUA(i)		((i) << SIFCTR_TFUA_SHIFT)
+#define SIFCTR_RFWM_MASK	GENMASK(15, 13)	/* Receive FIFO Watermark */
+#define SIFCTR_RFWM_1		(0 << 13)	/*  Transfer Request when 1 valid stages */
+#define SIFCTR_RFWM_4		(1 << 13)	/*  Transfer Request when 4 valid stages */
+#define SIFCTR_RFWM_8		(2 << 13)	/*  Transfer Request when 8 valid stages */
+#define SIFCTR_RFWM_16		(3 << 13)	/*  Transfer Request when 16 valid stages */
+#define SIFCTR_RFWM_32		(4 << 13)	/*  Transfer Request when 32 valid stages */
+#define SIFCTR_RFWM_64		(5 << 13)	/*  Transfer Request when 64 valid stages */
+#define SIFCTR_RFWM_128		(6 << 13)	/*  Transfer Request when 128 valid stages */
+#define SIFCTR_RFWM_256		(7 << 13)	/*  Transfer Request when 256 valid stages */
+#define SIFCTR_RFUA_MASK	GENMASK(12, 4)	/* Receive FIFO Usable Area (0x40 = full) */
+#define SIFCTR_RFUA_SHIFT	4
+#define SIFCTR_RFUA(i)		((i) << SIFCTR_RFUA_SHIFT)
+
+/* SISTR */
+#define SISTR_TFEMP		BIT(29) /* Transmit FIFO Empty */
+#define SISTR_TDREQ		BIT(28) /* Transmit Data Transfer Request */
+#define SISTR_TEOF		BIT(23) /* Frame Transmission End */
+#define SISTR_TFSERR		BIT(21) /* Transmit Frame Synchronization Error */
+#define SISTR_TFOVF		BIT(20) /* Transmit FIFO Overflow */
+#define SISTR_TFUDF		BIT(19) /* Transmit FIFO Underflow */
+#define SISTR_RFFUL		BIT(13) /* Receive FIFO Full */
+#define SISTR_RDREQ		BIT(12) /* Receive Data Transfer Request */
+#define SISTR_REOF		BIT(7)  /* Frame Reception End */
+#define SISTR_RFSERR		BIT(5)  /* Receive Frame Synchronization Error */
+#define SISTR_RFUDF		BIT(4)  /* Receive FIFO Underflow */
+#define SISTR_RFOVF		BIT(3)  /* Receive FIFO Overflow */
+
+/* SIIER */
+#define SIIER_TDMAE		BIT(31) /* Transmit Data DMA Transfer Req. Enable */
+#define SIIER_TFEMPE		BIT(29) /* Transmit FIFO Empty Enable */
+#define SIIER_TDREQE		BIT(28) /* Transmit Data Transfer Request Enable */
+#define SIIER_TEOFE		BIT(23) /* Frame Transmission End Enable */
+#define SIIER_TFSERRE		BIT(21) /* Transmit Frame Sync Error Enable */
+#define SIIER_TFOVFE		BIT(20) /* Transmit FIFO Overflow Enable */
+#define SIIER_TFUDFE		BIT(19) /* Transmit FIFO Underflow Enable */
+#define SIIER_RDMAE		BIT(15) /* Receive Data DMA Transfer Req. Enable */
+#define SIIER_RFFULE		BIT(13) /* Receive FIFO Full Enable */
+#define SIIER_RDREQE		BIT(12) /* Receive Data Transfer Request Enable */
+#define SIIER_REOFE		BIT(7)  /* Frame Reception End Enable */
+#define SIIER_RFSERRE		BIT(5)  /* Receive Frame Sync Error Enable */
+#define SIIER_RFUDFE		BIT(4)  /* Receive FIFO Underflow Enable */
+#define SIIER_RFOVFE		BIT(3)  /* Receive FIFO Overflow Enable */
 
 
 static u32 sh_msiof_read(struct sh_msiof_spi_priv *p, int reg_offs)
 {
 	switch (reg_offs) {
-	case TSCR:
-	case RSCR:
+	case SITSCR:
+	case SIRSCR:
 		return ioread16(p->mapbase + reg_offs);
 	default:
 		return ioread32(p->mapbase + reg_offs);
@@ -207,8 +204,8 @@ static void sh_msiof_write(struct sh_msiof_spi_priv *p, int reg_offs,
 			   u32 value)
 {
 	switch (reg_offs) {
-	case TSCR:
-	case RSCR:
+	case SITSCR:
+	case SIRSCR:
 		iowrite16(value, p->mapbase + reg_offs);
 		break;
 	default:
@@ -223,12 +220,12 @@ static int sh_msiof_modify_ctr_wait(struct sh_msiof_spi_priv *p,
 	u32 mask = clr | set;
 	u32 data;
 
-	data = sh_msiof_read(p, CTR);
+	data = sh_msiof_read(p, SICTR);
 	data &= ~clr;
 	data |= set;
-	sh_msiof_write(p, CTR, data);
+	sh_msiof_write(p, SICTR, data);
 
-	return readl_poll_timeout_atomic(p->mapbase + CTR, data,
+	return readl_poll_timeout_atomic(p->mapbase + SICTR, data,
 					 (data & mask) == set, 1, 100);
 }
 
@@ -237,7 +234,7 @@ static irqreturn_t sh_msiof_spi_irq(int irq, void *data)
 	struct sh_msiof_spi_priv *p = data;
 
 	/* just disable the interrupt and wake up */
-	sh_msiof_write(p, IER, 0);
+	sh_msiof_write(p, SIIER, 0);
 	complete(&p->done);
 
 	return IRQ_HANDLED;
@@ -245,20 +242,20 @@ static irqreturn_t sh_msiof_spi_irq(int irq, void *data)
 
 static void sh_msiof_spi_reset_regs(struct sh_msiof_spi_priv *p)
 {
-	u32 mask = CTR_TXRST | CTR_RXRST;
+	u32 mask = SICTR_TXRST | SICTR_RXRST;
 	u32 data;
 
-	data = sh_msiof_read(p, CTR);
+	data = sh_msiof_read(p, SICTR);
 	data |= mask;
-	sh_msiof_write(p, CTR, data);
+	sh_msiof_write(p, SICTR, data);
 
-	readl_poll_timeout_atomic(p->mapbase + CTR, data, !(data & mask), 1,
+	readl_poll_timeout_atomic(p->mapbase + SICTR, data, !(data & mask), 1,
 				  100);
 }
 
 static const u32 sh_msiof_spi_div_array[] = {
-	SCR_BRDV_DIV_1, SCR_BRDV_DIV_2,	 SCR_BRDV_DIV_4,
-	SCR_BRDV_DIV_8,	SCR_BRDV_DIV_16, SCR_BRDV_DIV_32,
+	SISCR_BRDV_DIV_1, SISCR_BRDV_DIV_2, SISCR_BRDV_DIV_4,
+	SISCR_BRDV_DIV_8, SISCR_BRDV_DIV_16, SISCR_BRDV_DIV_32,
 };
 
 static void sh_msiof_spi_set_clk_regs(struct sh_msiof_spi_priv *p,
@@ -276,7 +273,7 @@ static void sh_msiof_spi_set_clk_regs(struct sh_msiof_spi_priv *p,
 
 	div = DIV_ROUND_UP(parent_rate, spi_hz);
 	if (div <= 1024) {
-		/* SCR_BRDV_DIV_1 is valid only if BRPS is x 1/1 or x 1/2 */
+		/* SISCR_BRDV_DIV_1 is valid only if BRPS is x 1/1 or x 1/2 */
 		if (!div_pow && div <= 32 && div > 2)
 			div_pow = 1;
 
@@ -295,10 +292,10 @@ static void sh_msiof_spi_set_clk_regs(struct sh_msiof_spi_priv *p,
 		brps = 32;
 	}
 
-	scr = sh_msiof_spi_div_array[div_pow] | SCR_BRPS(brps);
-	sh_msiof_write(p, TSCR, scr);
+	scr = sh_msiof_spi_div_array[div_pow] | SISCR_BRPS(brps);
+	sh_msiof_write(p, SITSCR, scr);
 	if (!(p->ctlr->flags & SPI_CONTROLLER_MUST_TX))
-		sh_msiof_write(p, RSCR, scr);
+		sh_msiof_write(p, SIRSCR, scr);
 }
 
 static u32 sh_msiof_get_delay_bit(u32 dtdl_or_syncdl)
@@ -337,8 +334,8 @@ static u32 sh_msiof_spi_get_dtdl_and_syncdl(struct sh_msiof_spi_priv *p)
 		return 0;
 	}
 
-	val = sh_msiof_get_delay_bit(p->info->dtdl) << MDR1_DTDL_SHIFT;
-	val |= sh_msiof_get_delay_bit(p->info->syncdl) << MDR1_SYNCDL_SHIFT;
+	val = sh_msiof_get_delay_bit(p->info->dtdl) << SIMDR1_DTDL_SHIFT;
+	val |= sh_msiof_get_delay_bit(p->info->syncdl) << SIMDR1_SYNCDL_SHIFT;
 
 	return val;
 }
@@ -357,54 +354,54 @@ static void sh_msiof_spi_set_pin_regs(struct sh_msiof_spi_priv *p, u32 ss,
 	 *    1    0         11     11    0    0
 	 *    1    1         11     11    1    1
 	 */
-	tmp = MDR1_SYNCMD_SPI | 1 << MDR1_FLD_SHIFT | MDR1_XXSTP;
-	tmp |= !cs_high << MDR1_SYNCAC_SHIFT;
-	tmp |= lsb_first << MDR1_BITLSB_SHIFT;
+	tmp = SIMDR1_SYNCMD_SPI | 1 << SIMDR1_FLD_SHIFT | SIMDR1_XXSTP;
+	tmp |= !cs_high << SIMDR1_SYNCAC_SHIFT;
+	tmp |= lsb_first << SIMDR1_BITLSB_SHIFT;
 	tmp |= sh_msiof_spi_get_dtdl_and_syncdl(p);
 	if (spi_controller_is_slave(p->ctlr)) {
-		sh_msiof_write(p, TMDR1, tmp | TMDR1_PCON);
+		sh_msiof_write(p, SITMDR1, tmp | SITMDR1_PCON);
 	} else {
-		sh_msiof_write(p, TMDR1,
-			       tmp | MDR1_TRMD | TMDR1_PCON |
-			       (ss < MAX_SS ? ss : 0) << TMDR1_SYNCCH_SHIFT);
+		sh_msiof_write(p, SITMDR1,
+			       tmp | SIMDR1_TRMD | SITMDR1_PCON |
+			       (ss < MAX_SS ? ss : 0) << SITMDR1_SYNCCH_SHIFT);
 	}
 	if (p->ctlr->flags & SPI_CONTROLLER_MUST_TX) {
 		/* These bits are reserved if RX needs TX */
 		tmp &= ~0x0000ffff;
 	}
-	sh_msiof_write(p, RMDR1, tmp);
+	sh_msiof_write(p, SIRMDR1, tmp);
 
 	tmp = 0;
-	tmp |= CTR_TSCKIZ_SCK | cpol << CTR_TSCKIZ_POL_SHIFT;
-	tmp |= CTR_RSCKIZ_SCK | cpol << CTR_RSCKIZ_POL_SHIFT;
+	tmp |= SICTR_TSCKIZ_SCK | cpol << SICTR_TSCKIZ_POL_SHIFT;
+	tmp |= SICTR_RSCKIZ_SCK | cpol << SICTR_RSCKIZ_POL_SHIFT;
 
 	edge = cpol ^ !cpha;
 
-	tmp |= edge << CTR_TEDG_SHIFT;
-	tmp |= edge << CTR_REDG_SHIFT;
-	tmp |= tx_hi_z ? CTR_TXDIZ_HIZ : CTR_TXDIZ_LOW;
-	sh_msiof_write(p, CTR, tmp);
+	tmp |= edge << SICTR_TEDG_SHIFT;
+	tmp |= edge << SICTR_REDG_SHIFT;
+	tmp |= tx_hi_z ? SICTR_TXDIZ_HIZ : SICTR_TXDIZ_LOW;
+	sh_msiof_write(p, SICTR, tmp);
 }
 
 static void sh_msiof_spi_set_mode_regs(struct sh_msiof_spi_priv *p,
 				       const void *tx_buf, void *rx_buf,
 				       u32 bits, u32 words)
 {
-	u32 dr2 = MDR2_BITLEN1(bits) | MDR2_WDLEN1(words);
+	u32 dr2 = SIMDR2_BITLEN1(bits) | SIMDR2_WDLEN1(words);
 
 	if (tx_buf || (p->ctlr->flags & SPI_CONTROLLER_MUST_TX))
-		sh_msiof_write(p, TMDR2, dr2);
+		sh_msiof_write(p, SITMDR2, dr2);
 	else
-		sh_msiof_write(p, TMDR2, dr2 | MDR2_GRPMASK1);
+		sh_msiof_write(p, SITMDR2, dr2 | SIMDR2_GRPMASK1);
 
 	if (rx_buf)
-		sh_msiof_write(p, RMDR2, dr2);
+		sh_msiof_write(p, SIRMDR2, dr2);
 }
 
 static void sh_msiof_reset_str(struct sh_msiof_spi_priv *p)
 {
-	sh_msiof_write(p, STR,
-		       sh_msiof_read(p, STR) & ~(STR_TDREQ | STR_RDREQ));
+	sh_msiof_write(p, SISTR,
+		       sh_msiof_read(p, SISTR) & ~(SISTR_TDREQ | SISTR_RDREQ));
 }
 
 static void sh_msiof_spi_write_fifo_8(struct sh_msiof_spi_priv *p,
@@ -414,7 +411,7 @@ static void sh_msiof_spi_write_fifo_8(struct sh_msiof_spi_priv *p,
 	int k;
 
 	for (k = 0; k < words; k++)
-		sh_msiof_write(p, TFDR, buf_8[k] << fs);
+		sh_msiof_write(p, SITFDR, buf_8[k] << fs);
 }
 
 static void sh_msiof_spi_write_fifo_16(struct sh_msiof_spi_priv *p,
@@ -424,7 +421,7 @@ static void sh_msiof_spi_write_fifo_16(struct sh_msiof_spi_priv *p,
 	int k;
 
 	for (k = 0; k < words; k++)
-		sh_msiof_write(p, TFDR, buf_16[k] << fs);
+		sh_msiof_write(p, SITFDR, buf_16[k] << fs);
 }
 
 static void sh_msiof_spi_write_fifo_16u(struct sh_msiof_spi_priv *p,
@@ -434,7 +431,7 @@ static void sh_msiof_spi_write_fifo_16u(struct sh_msiof_spi_priv *p,
 	int k;
 
 	for (k = 0; k < words; k++)
-		sh_msiof_write(p, TFDR, get_unaligned(&buf_16[k]) << fs);
+		sh_msiof_write(p, SITFDR, get_unaligned(&buf_16[k]) << fs);
 }
 
 static void sh_msiof_spi_write_fifo_32(struct sh_msiof_spi_priv *p,
@@ -444,7 +441,7 @@ static void sh_msiof_spi_write_fifo_32(struct sh_msiof_spi_priv *p,
 	int k;
 
 	for (k = 0; k < words; k++)
-		sh_msiof_write(p, TFDR, buf_32[k] << fs);
+		sh_msiof_write(p, SITFDR, buf_32[k] << fs);
 }
 
 static void sh_msiof_spi_write_fifo_32u(struct sh_msiof_spi_priv *p,
@@ -454,7 +451,7 @@ static void sh_msiof_spi_write_fifo_32u(struct sh_msiof_spi_priv *p,
 	int k;
 
 	for (k = 0; k < words; k++)
-		sh_msiof_write(p, TFDR, get_unaligned(&buf_32[k]) << fs);
+		sh_msiof_write(p, SITFDR, get_unaligned(&buf_32[k]) << fs);
 }
 
 static void sh_msiof_spi_write_fifo_s32(struct sh_msiof_spi_priv *p,
@@ -464,7 +461,7 @@ static void sh_msiof_spi_write_fifo_s32(struct sh_msiof_spi_priv *p,
 	int k;
 
 	for (k = 0; k < words; k++)
-		sh_msiof_write(p, TFDR, swab32(buf_32[k] << fs));
+		sh_msiof_write(p, SITFDR, swab32(buf_32[k] << fs));
 }
 
 static void sh_msiof_spi_write_fifo_s32u(struct sh_msiof_spi_priv *p,
@@ -474,7 +471,7 @@ static void sh_msiof_spi_write_fifo_s32u(struct sh_msiof_spi_priv *p,
 	int k;
 
 	for (k = 0; k < words; k++)
-		sh_msiof_write(p, TFDR, swab32(get_unaligned(&buf_32[k]) << fs));
+		sh_msiof_write(p, SITFDR, swab32(get_unaligned(&buf_32[k]) << fs));
 }
 
 static void sh_msiof_spi_read_fifo_8(struct sh_msiof_spi_priv *p,
@@ -484,7 +481,7 @@ static void sh_msiof_spi_read_fifo_8(struct sh_msiof_spi_priv *p,
 	int k;
 
 	for (k = 0; k < words; k++)
-		buf_8[k] = sh_msiof_read(p, RFDR) >> fs;
+		buf_8[k] = sh_msiof_read(p, SIRFDR) >> fs;
 }
 
 static void sh_msiof_spi_read_fifo_16(struct sh_msiof_spi_priv *p,
@@ -494,7 +491,7 @@ static void sh_msiof_spi_read_fifo_16(struct sh_msiof_spi_priv *p,
 	int k;
 
 	for (k = 0; k < words; k++)
-		buf_16[k] = sh_msiof_read(p, RFDR) >> fs;
+		buf_16[k] = sh_msiof_read(p, SIRFDR) >> fs;
 }
 
 static void sh_msiof_spi_read_fifo_16u(struct sh_msiof_spi_priv *p,
@@ -504,7 +501,7 @@ static void sh_msiof_spi_read_fifo_16u(struct sh_msiof_spi_priv *p,
 	int k;
 
 	for (k = 0; k < words; k++)
-		put_unaligned(sh_msiof_read(p, RFDR) >> fs, &buf_16[k]);
+		put_unaligned(sh_msiof_read(p, SIRFDR) >> fs, &buf_16[k]);
 }
 
 static void sh_msiof_spi_read_fifo_32(struct sh_msiof_spi_priv *p,
@@ -514,7 +511,7 @@ static void sh_msiof_spi_read_fifo_32(struct sh_msiof_spi_priv *p,
 	int k;
 
 	for (k = 0; k < words; k++)
-		buf_32[k] = sh_msiof_read(p, RFDR) >> fs;
+		buf_32[k] = sh_msiof_read(p, SIRFDR) >> fs;
 }
 
 static void sh_msiof_spi_read_fifo_32u(struct sh_msiof_spi_priv *p,
@@ -524,7 +521,7 @@ static void sh_msiof_spi_read_fifo_32u(struct sh_msiof_spi_priv *p,
 	int k;
 
 	for (k = 0; k < words; k++)
-		put_unaligned(sh_msiof_read(p, RFDR) >> fs, &buf_32[k]);
+		put_unaligned(sh_msiof_read(p, SIRFDR) >> fs, &buf_32[k]);
 }
 
 static void sh_msiof_spi_read_fifo_s32(struct sh_msiof_spi_priv *p,
@@ -534,7 +531,7 @@ static void sh_msiof_spi_read_fifo_s32(struct sh_msiof_spi_priv *p,
 	int k;
 
 	for (k = 0; k < words; k++)
-		buf_32[k] = swab32(sh_msiof_read(p, RFDR) >> fs);
+		buf_32[k] = swab32(sh_msiof_read(p, SIRFDR) >> fs);
 }
 
 static void sh_msiof_spi_read_fifo_s32u(struct sh_msiof_spi_priv *p,
@@ -544,7 +541,7 @@ static void sh_msiof_spi_read_fifo_s32u(struct sh_msiof_spi_priv *p,
 	int k;
 
 	for (k = 0; k < words; k++)
-		put_unaligned(swab32(sh_msiof_read(p, RFDR) >> fs), &buf_32[k]);
+		put_unaligned(swab32(sh_msiof_read(p, SIRFDR) >> fs), &buf_32[k]);
 }
 
 static int sh_msiof_spi_setup(struct spi_device *spi)
@@ -561,17 +558,17 @@ static int sh_msiof_spi_setup(struct spi_device *spi)
 		return 0;
 
 	/* Configure native chip select mode/polarity early */
-	clr = MDR1_SYNCMD_MASK;
-	set = MDR1_SYNCMD_SPI;
+	clr = SIMDR1_SYNCMD_MASK;
+	set = SIMDR1_SYNCMD_SPI;
 	if (spi->mode & SPI_CS_HIGH)
-		clr |= BIT(MDR1_SYNCAC_SHIFT);
+		clr |= BIT(SIMDR1_SYNCAC_SHIFT);
 	else
-		set |= BIT(MDR1_SYNCAC_SHIFT);
+		set |= BIT(SIMDR1_SYNCAC_SHIFT);
 	pm_runtime_get_sync(&p->pdev->dev);
-	tmp = sh_msiof_read(p, TMDR1) & ~clr;
-	sh_msiof_write(p, TMDR1, tmp | set | MDR1_TRMD | TMDR1_PCON);
-	tmp = sh_msiof_read(p, RMDR1) & ~clr;
-	sh_msiof_write(p, RMDR1, tmp | set);
+	tmp = sh_msiof_read(p, SITMDR1) & ~clr;
+	sh_msiof_write(p, SITMDR1, tmp | set | SIMDR1_TRMD | SITMDR1_PCON);
+	tmp = sh_msiof_read(p, SIRMDR1) & ~clr;
+	sh_msiof_write(p, SIRMDR1, tmp | set);
 	pm_runtime_put(&p->pdev->dev);
 	p->native_cs_high = spi->mode & SPI_CS_HIGH;
 	p->native_cs_inited = true;
@@ -587,7 +584,7 @@ static int sh_msiof_prepare_message(struct spi_controller *ctlr,
 
 	/* Configure pins before asserting CS */
 	if (spi->cs_gpiod) {
-		ss = p->unused_ss;
+		ss = ctlr->unused_native_cs;
 		cs_high = p->native_cs_high;
 	} else {
 		ss = spi->chip_select;
@@ -607,15 +604,15 @@ static int sh_msiof_spi_start(struct sh_msiof_spi_priv *p, void *rx_buf)
 
 	/* setup clock and rx/tx signals */
 	if (!slave)
-		ret = sh_msiof_modify_ctr_wait(p, 0, CTR_TSCKE);
+		ret = sh_msiof_modify_ctr_wait(p, 0, SICTR_TSCKE);
 	if (rx_buf && !ret)
-		ret = sh_msiof_modify_ctr_wait(p, 0, CTR_RXE);
+		ret = sh_msiof_modify_ctr_wait(p, 0, SICTR_RXE);
 	if (!ret)
-		ret = sh_msiof_modify_ctr_wait(p, 0, CTR_TXE);
+		ret = sh_msiof_modify_ctr_wait(p, 0, SICTR_TXE);
 
 	/* start by setting frame bit */
 	if (!ret && !slave)
-		ret = sh_msiof_modify_ctr_wait(p, 0, CTR_TFSE);
+		ret = sh_msiof_modify_ctr_wait(p, 0, SICTR_TFSE);
 
 	return ret;
 }
@@ -627,13 +624,13 @@ static int sh_msiof_spi_stop(struct sh_msiof_spi_priv *p, void *rx_buf)
 
 	/* shut down frame, rx/tx and clock signals */
 	if (!slave)
-		ret = sh_msiof_modify_ctr_wait(p, CTR_TFSE, 0);
+		ret = sh_msiof_modify_ctr_wait(p, SICTR_TFSE, 0);
 	if (!ret)
-		ret = sh_msiof_modify_ctr_wait(p, CTR_TXE, 0);
+		ret = sh_msiof_modify_ctr_wait(p, SICTR_TXE, 0);
 	if (rx_buf && !ret)
-		ret = sh_msiof_modify_ctr_wait(p, CTR_RXE, 0);
+		ret = sh_msiof_modify_ctr_wait(p, SICTR_RXE, 0);
 	if (!ret && !slave)
-		ret = sh_msiof_modify_ctr_wait(p, CTR_TSCKE, 0);
+		ret = sh_msiof_modify_ctr_wait(p, SICTR_TSCKE, 0);
 
 	return ret;
 }
@@ -688,11 +685,11 @@ static int sh_msiof_spi_txrx_once(struct sh_msiof_spi_priv *p,
 	fifo_shift = 32 - bits;
 
 	/* default FIFO watermarks for PIO */
-	sh_msiof_write(p, FCTR, 0);
+	sh_msiof_write(p, SIFCTR, 0);
 
 	/* setup msiof transfer mode registers */
 	sh_msiof_spi_set_mode_regs(p, tx_buf, rx_buf, bits, words);
-	sh_msiof_write(p, IER, IER_TEOFE | IER_REOFE);
+	sh_msiof_write(p, SIIER, SIIER_TEOFE | SIIER_REOFE);
 
 	/* write tx fifo */
 	if (tx_buf)
@@ -731,7 +728,7 @@ static int sh_msiof_spi_txrx_once(struct sh_msiof_spi_priv *p,
 	sh_msiof_reset_str(p);
 	sh_msiof_spi_stop(p, rx_buf);
 stop_ier:
-	sh_msiof_write(p, IER, 0);
+	sh_msiof_write(p, SIIER, 0);
 	return ret;
 }
 
@@ -750,7 +747,7 @@ static int sh_msiof_dma_once(struct sh_msiof_spi_priv *p, const void *tx,
 
 	/* First prepare and submit the DMA request(s), as this may fail */
 	if (rx) {
-		ier_bits |= IER_RDREQE | IER_RDMAE;
+		ier_bits |= SIIER_RDREQE | SIIER_RDMAE;
 		desc_rx = dmaengine_prep_slave_single(p->ctlr->dma_rx,
 					p->rx_dma_addr, len, DMA_DEV_TO_MEM,
 					DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
@@ -765,7 +762,7 @@ static int sh_msiof_dma_once(struct sh_msiof_spi_priv *p, const void *tx,
 	}
 
 	if (tx) {
-		ier_bits |= IER_TDREQE | IER_TDMAE;
+		ier_bits |= SIIER_TDREQE | SIIER_TDMAE;
 		dma_sync_single_for_device(p->ctlr->dma_tx->device->dev,
 					   p->tx_dma_addr, len, DMA_TO_DEVICE);
 		desc_tx = dmaengine_prep_slave_single(p->ctlr->dma_tx,
@@ -786,12 +783,12 @@ static int sh_msiof_dma_once(struct sh_msiof_spi_priv *p, const void *tx,
 	}
 
 	/* 1 stage FIFO watermarks for DMA */
-	sh_msiof_write(p, FCTR, FCTR_TFWM_1 | FCTR_RFWM_1);
+	sh_msiof_write(p, SIFCTR, SIFCTR_TFWM_1 | SIFCTR_RFWM_1);
 
 	/* setup msiof transfer mode registers (32-bit words) */
 	sh_msiof_spi_set_mode_regs(p, tx, rx, 32, len / 4);
 
-	sh_msiof_write(p, IER, ier_bits);
+	sh_msiof_write(p, SIIER, ier_bits);
 
 	reinit_completion(&p->done);
 	if (tx)
@@ -823,10 +820,10 @@ static int sh_msiof_dma_once(struct sh_msiof_spi_priv *p, const void *tx,
 		if (ret)
 			goto stop_reset;
 
-		sh_msiof_write(p, IER, 0);
+		sh_msiof_write(p, SIIER, 0);
 	} else {
 		/* wait for tx fifo to be emptied */
-		sh_msiof_write(p, IER, IER_TEOFE);
+		sh_msiof_write(p, SIIER, SIIER_TEOFE);
 		ret = sh_msiof_wait_for_completion(p, &p->done);
 		if (ret)
 			goto stop_reset;
@@ -856,7 +853,7 @@ static int sh_msiof_dma_once(struct sh_msiof_spi_priv *p, const void *tx,
 no_dma_tx:
 	if (rx)
 		dmaengine_terminate_all(p->ctlr->dma_rx);
-	sh_msiof_write(p, IER, 0);
+	sh_msiof_write(p, SIIER, 0);
 	return ret;
 }
 
@@ -1124,46 +1121,6 @@ static struct sh_msiof_spi_info *sh_msiof_spi_parse_dt(struct device *dev)
 }
 #endif
 
-static int sh_msiof_get_cs_gpios(struct sh_msiof_spi_priv *p)
-{
-	struct device *dev = &p->pdev->dev;
-	unsigned int used_ss_mask = 0;
-	unsigned int cs_gpios = 0;
-	unsigned int num_cs, i;
-	int ret;
-
-	ret = gpiod_count(dev, "cs");
-	if (ret <= 0)
-		return 0;
-
-	num_cs = max_t(unsigned int, ret, p->ctlr->num_chipselect);
-	for (i = 0; i < num_cs; i++) {
-		struct gpio_desc *gpiod;
-
-		gpiod = devm_gpiod_get_index(dev, "cs", i, GPIOD_ASIS);
-		if (!IS_ERR(gpiod)) {
-			devm_gpiod_put(dev, gpiod);
-			cs_gpios++;
-			continue;
-		}
-
-		if (PTR_ERR(gpiod) != -ENOENT)
-			return PTR_ERR(gpiod);
-
-		if (i >= MAX_SS) {
-			dev_err(dev, "Invalid native chip select %d\n", i);
-			return -EINVAL;
-		}
-		used_ss_mask |= BIT(i);
-	}
-	p->unused_ss = ffz(used_ss_mask);
-	if (cs_gpios && p->unused_ss >= MAX_SS) {
-		dev_err(dev, "No unused native chip select available\n");
-		return -EINVAL;
-	}
-	return 0;
-}
-
 static struct dma_chan *sh_msiof_request_dma_chan(struct device *dev,
 	enum dma_transfer_direction dir, unsigned int id, dma_addr_t port_addr)
 {
@@ -1232,12 +1189,12 @@ static int sh_msiof_request_dma(struct sh_msiof_spi_priv *p)
 
 	ctlr = p->ctlr;
 	ctlr->dma_tx = sh_msiof_request_dma_chan(dev, DMA_MEM_TO_DEV,
-						 dma_tx_id, res->start + TFDR);
+						 dma_tx_id, res->start + SITFDR);
 	if (!ctlr->dma_tx)
 		return -ENODEV;
 
 	ctlr->dma_rx = sh_msiof_request_dma_chan(dev, DMA_DEV_TO_MEM,
-						 dma_rx_id, res->start + RFDR);
+						 dma_rx_id, res->start + SIRFDR);
 	if (!ctlr->dma_rx)
 		goto free_tx_chan;
 
@@ -1373,17 +1330,12 @@ static int sh_msiof_spi_probe(struct platform_device *pdev)
 	if (p->info->rx_fifo_override)
 		p->rx_fifo_size = p->info->rx_fifo_override;
 
-	/* Setup GPIO chip selects */
-	ctlr->num_chipselect = p->info->num_chipselect;
-	ret = sh_msiof_get_cs_gpios(p);
-	if (ret)
-		goto err1;
-
 	/* init controller code */
 	ctlr->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH;
 	ctlr->mode_bits |= SPI_LSB_FIRST | SPI_3WIRE;
 	ctlr->flags = chipdata->ctlr_flags;
 	ctlr->bus_num = pdev->id;
+	ctlr->num_chipselect = p->info->num_chipselect;
 	ctlr->dev.of_node = pdev->dev.of_node;
 	ctlr->setup = sh_msiof_spi_setup;
 	ctlr->prepare_message = sh_msiof_prepare_message;
@@ -1392,6 +1344,7 @@ static int sh_msiof_spi_probe(struct platform_device *pdev)
 	ctlr->auto_runtime_pm = true;
 	ctlr->transfer_one = sh_msiof_transfer_one;
 	ctlr->use_gpio_descriptors = true;
+	ctlr->max_native_cs = MAX_SS;
 
 	ret = sh_msiof_request_dma(p);
 	if (ret < 0)

drivers/spi/spi-sirf.c

@@ -1126,16 +1126,16 @@ static int spi_sirfsoc_probe(struct platform_device *pdev)
 	sspi->bitbang.master->dev.of_node = pdev->dev.of_node;
 
 	/* request DMA channels */
-	sspi->rx_chan = dma_request_slave_channel(&pdev->dev, "rx");
-	if (!sspi->rx_chan) {
+	sspi->rx_chan = dma_request_chan(&pdev->dev, "rx");
+	if (IS_ERR(sspi->rx_chan)) {
 		dev_err(&pdev->dev, "can not allocate rx dma channel\n");
-		ret = -ENODEV;
+		ret = PTR_ERR(sspi->rx_chan);
 		goto free_master;
 	}
-	sspi->tx_chan = dma_request_slave_channel(&pdev->dev, "tx");
-	if (!sspi->tx_chan) {
+	sspi->tx_chan = dma_request_chan(&pdev->dev, "tx");
+	if (IS_ERR(sspi->tx_chan)) {
 		dev_err(&pdev->dev, "can not allocate tx dma channel\n");
-		ret = -ENODEV;
+		ret = PTR_ERR(sspi->tx_chan);
 		goto free_rx_dma;
 	}
 

drivers/spi/spi-stm32-qspi.c

@@ -470,10 +470,11 @@ static int stm32_qspi_setup(struct spi_device *spi)
 	return 0;
 }
 
-static void stm32_qspi_dma_setup(struct stm32_qspi *qspi)
+static int stm32_qspi_dma_setup(struct stm32_qspi *qspi)
 {
 	struct dma_slave_config dma_cfg;
 	struct device *dev = qspi->dev;
+	int ret = 0;
 
 	memset(&dma_cfg, 0, sizeof(dma_cfg));
 
@@ -484,8 +485,13 @@ static void stm32_qspi_dma_setup(struct stm32_qspi *qspi)
 	dma_cfg.src_maxburst = 4;
 	dma_cfg.dst_maxburst = 4;
 
-	qspi->dma_chrx = dma_request_slave_channel(dev, "rx");
-	if (qspi->dma_chrx) {
+	qspi->dma_chrx = dma_request_chan(dev, "rx");
+	if (IS_ERR(qspi->dma_chrx)) {
+		ret = PTR_ERR(qspi->dma_chrx);
+		qspi->dma_chrx = NULL;
+		if (ret == -EPROBE_DEFER)
+			goto out;
+	} else {
 		if (dmaengine_slave_config(qspi->dma_chrx, &dma_cfg)) {
 			dev_err(dev, "dma rx config failed\n");
 			dma_release_channel(qspi->dma_chrx);
@@ -493,8 +499,11 @@ static void stm32_qspi_dma_setup(struct stm32_qspi *qspi)
 		}
 	}
 
-	qspi->dma_chtx = dma_request_slave_channel(dev, "tx");
-	if (qspi->dma_chtx) {
+	qspi->dma_chtx = dma_request_chan(dev, "tx");
+	if (IS_ERR(qspi->dma_chtx)) {
+		ret = PTR_ERR(qspi->dma_chtx);
+		qspi->dma_chtx = NULL;
+	} else {
 		if (dmaengine_slave_config(qspi->dma_chtx, &dma_cfg)) {
 			dev_err(dev, "dma tx config failed\n");
 			dma_release_channel(qspi->dma_chtx);
@@ -502,7 +511,13 @@ static void stm32_qspi_dma_setup(struct stm32_qspi *qspi)
 		}
 	}
 
+out:
 	init_completion(&qspi->dma_completion);
+
+	if (ret != -EPROBE_DEFER)
+		ret = 0;
+
+	return ret;
 }
 
 static void stm32_qspi_dma_free(struct stm32_qspi *qspi)
@@ -608,7 +623,10 @@ static int stm32_qspi_probe(struct platform_device *pdev)
 
 	qspi->dev = dev;
 	platform_set_drvdata(pdev, qspi);
-	stm32_qspi_dma_setup(qspi);
+	ret = stm32_qspi_dma_setup(qspi);
+	if (ret)
+		goto err;
+
 	mutex_init(&qspi->lock);
 
 	ctrl->mode_bits = SPI_RX_DUAL | SPI_RX_QUAD

drivers/spi/spi-stm32.c

@@ -9,7 +9,6 @@
 #include <linux/clk.h>
 #include <linux/delay.h>
 #include <linux/dmaengine.h>
-#include <linux/gpio.h>
 #include <linux/interrupt.h>
 #include <linux/iopoll.h>
 #include <linux/module.h>
@@ -973,29 +972,6 @@ static irqreturn_t stm32h7_spi_irq_thread(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
-/**
- * stm32_spi_setup - setup device chip select
- */
-static int stm32_spi_setup(struct spi_device *spi_dev)
-{
-	int ret = 0;
-
-	if (!gpio_is_valid(spi_dev->cs_gpio)) {
-		dev_err(&spi_dev->dev, "%d is not a valid gpio\n",
-			spi_dev->cs_gpio);
-		return -EINVAL;
-	}
-
-	dev_dbg(&spi_dev->dev, "%s: set gpio%d output %s\n", __func__,
-		spi_dev->cs_gpio,
-		(spi_dev->mode & SPI_CS_HIGH) ? "low" : "high");
-
-	ret = gpio_direction_output(spi_dev->cs_gpio,
-				    !(spi_dev->mode & SPI_CS_HIGH));
-
-	return ret;
-}
-
 /**
  * stm32_spi_prepare_msg - set up the controller to transfer a single message
  */
@@ -1810,7 +1786,7 @@ static int stm32_spi_probe(struct platform_device *pdev)
 	struct spi_master *master;
 	struct stm32_spi *spi;
 	struct resource *res;
-	int i, ret;
+	int ret;
 
 	master = spi_alloc_master(&pdev->dev, sizeof(struct stm32_spi));
 	if (!master) {
@@ -1898,22 +1874,34 @@ static int stm32_spi_probe(struct platform_device *pdev)
 	master->bits_per_word_mask = spi->cfg->get_bpw_mask(spi);
 	master->max_speed_hz = spi->clk_rate / spi->cfg->baud_rate_div_min;
 	master->min_speed_hz = spi->clk_rate / spi->cfg->baud_rate_div_max;
-	master->setup = stm32_spi_setup;
+	master->use_gpio_descriptors = true;
 	master->prepare_message = stm32_spi_prepare_msg;
 	master->transfer_one = stm32_spi_transfer_one;
 	master->unprepare_message = stm32_spi_unprepare_msg;
 
-	spi->dma_tx = dma_request_slave_channel(spi->dev, "tx");
-	if (!spi->dma_tx)
+	spi->dma_tx = dma_request_chan(spi->dev, "tx");
+	if (IS_ERR(spi->dma_tx)) {
+		ret = PTR_ERR(spi->dma_tx);
+		spi->dma_tx = NULL;
+		if (ret == -EPROBE_DEFER)
+			goto err_clk_disable;
+
 		dev_warn(&pdev->dev, "failed to request tx dma channel\n");
-	else
+	} else {
 		master->dma_tx = spi->dma_tx;
+	}
+
+	spi->dma_rx = dma_request_chan(spi->dev, "rx");
+	if (IS_ERR(spi->dma_rx)) {
+		ret = PTR_ERR(spi->dma_rx);
+		spi->dma_rx = NULL;
+		if (ret == -EPROBE_DEFER)
+			goto err_dma_release;
 
-	spi->dma_rx = dma_request_slave_channel(spi->dev, "rx");
-	if (!spi->dma_rx)
 		dev_warn(&pdev->dev, "failed to request rx dma channel\n");
-	else
+	} else {
 		master->dma_rx = spi->dma_rx;
+	}
 
 	if (spi->dma_tx || spi->dma_rx)
 		master->can_dma = stm32_spi_can_dma;
@@ -1925,43 +1913,26 @@ static int stm32_spi_probe(struct platform_device *pdev)
 	if (ret) {
 		dev_err(&pdev->dev, "spi master registration failed: %d\n",
 			ret);
-		goto err_dma_release;
+		goto err_pm_disable;
 	}
 
-	if (!master->cs_gpios) {
+	if (!master->cs_gpiods) {
 		dev_err(&pdev->dev, "no CS gpios available\n");
 		ret = -EINVAL;
-		goto err_dma_release;
-	}
-
-	for (i = 0; i < master->num_chipselect; i++) {
-		if (!gpio_is_valid(master->cs_gpios[i])) {
-			dev_err(&pdev->dev, "%i is not a valid gpio\n",
-				master->cs_gpios[i]);
-			ret = -EINVAL;
-			goto err_dma_release;
-		}
-
-		ret = devm_gpio_request(&pdev->dev, master->cs_gpios[i],
-					DRIVER_NAME);
-		if (ret) {
-			dev_err(&pdev->dev, "can't get CS gpio %i\n",
-				master->cs_gpios[i]);
-			goto err_dma_release;
-		}
+		goto err_pm_disable;
 	}
 
 	dev_info(&pdev->dev, "driver initialized\n");
 
 	return 0;
 
+err_pm_disable:
+	pm_runtime_disable(&pdev->dev);
 err_dma_release:
 	if (spi->dma_tx)
 		dma_release_channel(spi->dma_tx);
 	if (spi->dma_rx)
 		dma_release_channel(spi->dma_rx);
-
-	pm_runtime_disable(&pdev->dev);
 err_clk_disable:
 	clk_disable_unprepare(spi->clk);
 err_master_put:

drivers/spi/spi-tegra114.c

@@ -269,10 +269,10 @@ static unsigned tegra_spi_calculate_curr_xfer_param(
 
 	if ((bits_per_word == 8 || bits_per_word == 16 ||
 	     bits_per_word == 32) && t->len > 3) {
-		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;
 	}
 

drivers/spi/spi-ti-qspi.c

@@ -80,8 +80,6 @@ struct ti_qspi {
 
 #define QSPI_COMPLETION_TIMEOUT		msecs_to_jiffies(2000)
 
-#define QSPI_FCLK			192000000
-
 /* Clock Control */
 #define QSPI_CLK_EN			(1 << 31)
 #define QSPI_CLK_DIV_MAX		0xffff
@@ -316,6 +314,8 @@ static int qspi_read_msg(struct ti_qspi *qspi, struct spi_transfer *t,
 {
 	int wlen;
 	unsigned int cmd;
+	u32 rx;
+	u8 rxlen, rx_wlen;
 	u8 *rxbuf;
 
 	rxbuf = t->rx_buf;
@@ -332,20 +332,67 @@ static int qspi_read_msg(struct ti_qspi *qspi, struct spi_transfer *t,
 		break;
 	}
 	wlen = t->bits_per_word >> 3;	/* in bytes */
+	rx_wlen = wlen;
 
 	while (count) {
 		dev_dbg(qspi->dev, "rx cmd %08x dc %08x\n", cmd, qspi->dc);
 		if (qspi_is_busy(qspi))
 			return -EBUSY;
 
+		switch (wlen) {
+		case 1:
+			/*
+			 * Optimize the 8-bit words transfers, as used by
+			 * the SPI flash devices.
+			 */
+			if (count >= QSPI_WLEN_MAX_BYTES) {
+				rxlen = QSPI_WLEN_MAX_BYTES;
+			} else {
+				rxlen = min(count, 4);
+			}
+			rx_wlen = rxlen << 3;
+			cmd &= ~QSPI_WLEN_MASK;
+			cmd |= QSPI_WLEN(rx_wlen);
+			break;
+		default:
+			rxlen = wlen;
+			break;
+		}
+
 		ti_qspi_write(qspi, cmd, QSPI_SPI_CMD_REG);
 		if (ti_qspi_poll_wc(qspi)) {
 			dev_err(qspi->dev, "read timed out\n");
 			return -ETIMEDOUT;
 		}
+
 		switch (wlen) {
 		case 1:
-			*rxbuf = readb(qspi->base + QSPI_SPI_DATA_REG);
+			/*
+			 * Optimize the 8-bit words transfers, as used by
+			 * the SPI flash devices.
+			 */
+			if (count >= QSPI_WLEN_MAX_BYTES) {
+				u32 *rxp = (u32 *) rxbuf;
+				rx = readl(qspi->base + QSPI_SPI_DATA_REG_3);
+				*rxp++ = be32_to_cpu(rx);
+				rx = readl(qspi->base + QSPI_SPI_DATA_REG_2);
+				*rxp++ = be32_to_cpu(rx);
+				rx = readl(qspi->base + QSPI_SPI_DATA_REG_1);
+				*rxp++ = be32_to_cpu(rx);
+				rx = readl(qspi->base + QSPI_SPI_DATA_REG);
+				*rxp++ = be32_to_cpu(rx);
+			} else {
+				u8 *rxp = rxbuf;
+				rx = readl(qspi->base + QSPI_SPI_DATA_REG);
+				if (rx_wlen >= 8)
+					*rxp++ = rx >> (rx_wlen - 8);
+				if (rx_wlen >= 16)
+					*rxp++ = rx >> (rx_wlen - 16);
+				if (rx_wlen >= 24)
+					*rxp++ = rx >> (rx_wlen - 24);
+				if (rx_wlen >= 32)
+					*rxp++ = rx;
+			}
 			break;
 		case 2:
 			*((u16 *)rxbuf) = readw(qspi->base + QSPI_SPI_DATA_REG);
@@ -354,8 +401,8 @@ static int qspi_read_msg(struct ti_qspi *qspi, struct spi_transfer *t,
 			*((u32 *)rxbuf) = readl(qspi->base + QSPI_SPI_DATA_REG);
 			break;
 		}
-		rxbuf += wlen;
-		count -= wlen;
+		rxbuf += rxlen;
+		count -= rxlen;
 	}
 
 	return 0;
@@ -527,6 +574,35 @@ static void ti_qspi_setup_mmap_read(struct spi_device *spi, u8 opcode,
 		      QSPI_SPI_SETUP_REG(spi->chip_select));
 }
 
+static int ti_qspi_adjust_op_size(struct spi_mem *mem, struct spi_mem_op *op)
+{
+	struct ti_qspi *qspi = spi_controller_get_devdata(mem->spi->master);
+	size_t max_len;
+
+	if (op->data.dir == SPI_MEM_DATA_IN) {
+		if (op->addr.val < qspi->mmap_size) {
+			/* Limit MMIO to the mmaped region */
+			if (op->addr.val + op->data.nbytes > qspi->mmap_size) {
+				max_len = qspi->mmap_size - op->addr.val;
+				op->data.nbytes = min((size_t) op->data.nbytes,
+						      max_len);
+			}
+		} else {
+			/*
+			 * Use fallback mode (SW generated transfers) above the
+			 * mmaped region.
+			 * Adjust size to comply with the QSPI max frame length.
+			 */
+			max_len = QSPI_FRAME;
+			max_len -= 1 + op->addr.nbytes + op->dummy.nbytes;
+			op->data.nbytes = min((size_t) op->data.nbytes,
+					      max_len);
+		}
+	}
+
+	return 0;
+}
+
 static int ti_qspi_exec_mem_op(struct spi_mem *mem,
 			       const struct spi_mem_op *op)
 {
@@ -577,6 +653,7 @@ static int ti_qspi_exec_mem_op(struct spi_mem *mem,
 
 static const struct spi_controller_mem_ops ti_qspi_mem_ops = {
 	.exec_op = ti_qspi_exec_mem_op,
+	.adjust_op_size = ti_qspi_adjust_op_size,
 };
 
 static int ti_qspi_start_transfer_one(struct spi_master *master,

drivers/spi/spi-topcliff-pch.c

@@ -863,7 +863,7 @@ static void pch_spi_request_dma(struct pch_spi_data *data, int bpw)
 	/* Set Tx DMA */
 	param = &dma->param_tx;
 	param->dma_dev = &dma_dev->dev;
-	param->chan_id = data->ch * 2; /* Tx = 0, 2 */;
+	param->chan_id = data->ch * 2; /* Tx = 0, 2 */
 	param->tx_reg = data->io_base_addr + PCH_SPDWR;
 	param->width = width;
 	chan = dma_request_channel(mask, pch_spi_filter, param);
@@ -878,7 +878,7 @@ static void pch_spi_request_dma(struct pch_spi_data *data, int bpw)
 	/* Set Rx DMA */
 	param = &dma->param_rx;
 	param->dma_dev = &dma_dev->dev;
-	param->chan_id = data->ch * 2 + 1; /* Rx = Tx + 1 */;
+	param->chan_id = data->ch * 2 + 1; /* Rx = Tx + 1 */
 	param->rx_reg = data->io_base_addr + PCH_SPDRR;
 	param->width = width;
 	chan = dma_request_channel(mask, pch_spi_filter, param);

drivers/spi/spi-uniphier.c

@@ -8,6 +8,7 @@
 #include <linux/bitops.h>
 #include <linux/clk.h>
 #include <linux/delay.h>
+#include <linux/dmaengine.h>
 #include <linux/interrupt.h>
 #include <linux/io.h>
 #include <linux/module.h>
@@ -23,6 +24,7 @@
 
 struct uniphier_spi_priv {
 	void __iomem *base;
+	dma_addr_t base_dma_addr;
 	struct clk *clk;
 	struct spi_master *master;
 	struct completion xfer_done;
@@ -32,6 +34,7 @@ struct uniphier_spi_priv {
 	unsigned int rx_bytes;
 	const u8 *tx_buf;
 	u8 *rx_buf;
+	atomic_t dma_busy;
 
 	bool is_save_param;
 	u8 bits_per_word;
@@ -61,11 +64,16 @@ struct uniphier_spi_priv {
 #define   SSI_FPS_FSTRT		BIT(14)
 
 #define SSI_SR			0x14
+#define   SSI_SR_BUSY		BIT(7)
 #define   SSI_SR_RNE		BIT(0)
 
 #define SSI_IE			0x18
+#define   SSI_IE_TCIE		BIT(4)
 #define   SSI_IE_RCIE		BIT(3)
+#define   SSI_IE_TXRE		BIT(2)
+#define   SSI_IE_RXRE		BIT(1)
 #define   SSI_IE_RORIE		BIT(0)
+#define   SSI_IE_ALL_MASK	GENMASK(4, 0)
 
 #define SSI_IS			0x1c
 #define   SSI_IS_RXRS		BIT(9)
@@ -87,15 +95,19 @@ struct uniphier_spi_priv {
 #define SSI_RXDR		0x24
 
 #define SSI_FIFO_DEPTH		8U
+#define SSI_FIFO_BURST_NUM	1
+
+#define SSI_DMA_RX_BUSY		BIT(1)
+#define SSI_DMA_TX_BUSY		BIT(0)
 
 static inline unsigned int bytes_per_word(unsigned int bits)
 {
 	return bits <= 8 ? 1 : (bits <= 16 ? 2 : 4);
 }
 
-static inline void uniphier_spi_irq_enable(struct spi_device *spi, u32 mask)
+static inline void uniphier_spi_irq_enable(struct uniphier_spi_priv *priv,
+					   u32 mask)
 {
-	struct uniphier_spi_priv *priv = spi_master_get_devdata(spi->master);
 	u32 val;
 
 	val = readl(priv->base + SSI_IE);
@@ -103,9 +115,9 @@ static inline void uniphier_spi_irq_enable(struct spi_device *spi, u32 mask)
 	writel(val, priv->base + SSI_IE);
 }
 
-static inline void uniphier_spi_irq_disable(struct spi_device *spi, u32 mask)
+static inline void uniphier_spi_irq_disable(struct uniphier_spi_priv *priv,
+					    u32 mask)
 {
-	struct uniphier_spi_priv *priv = spi_master_get_devdata(spi->master);
 	u32 val;
 
 	val = readl(priv->base + SSI_IE);
@@ -334,6 +346,128 @@ static void uniphier_spi_set_cs(struct spi_device *spi, bool enable)
 	writel(val, priv->base + SSI_FPS);
 }
 
+static bool uniphier_spi_can_dma(struct spi_master *master,
+				 struct spi_device *spi,
+				 struct spi_transfer *t)
+{
+	struct uniphier_spi_priv *priv = spi_master_get_devdata(master);
+	unsigned int bpw = bytes_per_word(priv->bits_per_word);
+
+	if ((!master->dma_tx && !master->dma_rx)
+	    || (!master->dma_tx && t->tx_buf)
+	    || (!master->dma_rx && t->rx_buf))
+		return false;
+
+	return DIV_ROUND_UP(t->len, bpw) > SSI_FIFO_DEPTH;
+}
+
+static void uniphier_spi_dma_rxcb(void *data)
+{
+	struct spi_master *master = data;
+	struct uniphier_spi_priv *priv = spi_master_get_devdata(master);
+	int state = atomic_fetch_andnot(SSI_DMA_RX_BUSY, &priv->dma_busy);
+
+	uniphier_spi_irq_disable(priv, SSI_IE_RXRE);
+
+	if (!(state & SSI_DMA_TX_BUSY))
+		spi_finalize_current_transfer(master);
+}
+
+static void uniphier_spi_dma_txcb(void *data)
+{
+	struct spi_master *master = data;
+	struct uniphier_spi_priv *priv = spi_master_get_devdata(master);
+	int state = atomic_fetch_andnot(SSI_DMA_TX_BUSY, &priv->dma_busy);
+
+	uniphier_spi_irq_disable(priv, SSI_IE_TXRE);
+
+	if (!(state & SSI_DMA_RX_BUSY))
+		spi_finalize_current_transfer(master);
+}
+
+static int uniphier_spi_transfer_one_dma(struct spi_master *master,
+					 struct spi_device *spi,
+					 struct spi_transfer *t)
+{
+	struct uniphier_spi_priv *priv = spi_master_get_devdata(master);
+	struct dma_async_tx_descriptor *rxdesc = NULL, *txdesc = NULL;
+	int buswidth;
+
+	atomic_set(&priv->dma_busy, 0);
+
+	uniphier_spi_set_fifo_threshold(priv, SSI_FIFO_BURST_NUM);
+
+	if (priv->bits_per_word <= 8)
+		buswidth = DMA_SLAVE_BUSWIDTH_1_BYTE;
+	else if (priv->bits_per_word <= 16)
+		buswidth = DMA_SLAVE_BUSWIDTH_2_BYTES;
+	else
+		buswidth = DMA_SLAVE_BUSWIDTH_4_BYTES;
+
+	if (priv->rx_buf) {
+		struct dma_slave_config rxconf = {
+			.direction = DMA_DEV_TO_MEM,
+			.src_addr = priv->base_dma_addr + SSI_RXDR,
+			.src_addr_width = buswidth,
+			.src_maxburst = SSI_FIFO_BURST_NUM,
+		};
+
+		dmaengine_slave_config(master->dma_rx, &rxconf);
+
+		rxdesc = dmaengine_prep_slave_sg(
+			master->dma_rx,
+			t->rx_sg.sgl, t->rx_sg.nents,
+			DMA_DEV_TO_MEM, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
+		if (!rxdesc)
+			goto out_err_prep;
+
+		rxdesc->callback = uniphier_spi_dma_rxcb;
+		rxdesc->callback_param = master;
+
+		uniphier_spi_irq_enable(priv, SSI_IE_RXRE);
+		atomic_or(SSI_DMA_RX_BUSY, &priv->dma_busy);
+
+		dmaengine_submit(rxdesc);
+		dma_async_issue_pending(master->dma_rx);
+	}
+
+	if (priv->tx_buf) {
+		struct dma_slave_config txconf = {
+			.direction = DMA_MEM_TO_DEV,
+			.dst_addr = priv->base_dma_addr + SSI_TXDR,
+			.dst_addr_width = buswidth,
+			.dst_maxburst = SSI_FIFO_BURST_NUM,
+		};
+
+		dmaengine_slave_config(master->dma_tx, &txconf);
+
+		txdesc = dmaengine_prep_slave_sg(
+			master->dma_tx,
+			t->tx_sg.sgl, t->tx_sg.nents,
+			DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
+		if (!txdesc)
+			goto out_err_prep;
+
+		txdesc->callback = uniphier_spi_dma_txcb;
+		txdesc->callback_param = master;
+
+		uniphier_spi_irq_enable(priv, SSI_IE_TXRE);
+		atomic_or(SSI_DMA_TX_BUSY, &priv->dma_busy);
+
+		dmaengine_submit(txdesc);
+		dma_async_issue_pending(master->dma_tx);
+	}
+
+	/* signal that we need to wait for completion */
+	return (priv->tx_buf || priv->rx_buf);
+
+out_err_prep:
+	if (rxdesc)
+		dmaengine_terminate_sync(master->dma_rx);
+
+	return -EINVAL;
+}
+
 static int uniphier_spi_transfer_one_irq(struct spi_master *master,
 					 struct spi_device *spi,
 					 struct spi_transfer *t)
@@ -346,12 +480,12 @@ static int uniphier_spi_transfer_one_irq(struct spi_master *master,
 
 	uniphier_spi_fill_tx_fifo(priv);
 
-	uniphier_spi_irq_enable(spi, SSI_IE_RCIE | SSI_IE_RORIE);
+	uniphier_spi_irq_enable(priv, SSI_IE_RCIE | SSI_IE_RORIE);
 
 	time_left = wait_for_completion_timeout(&priv->xfer_done,
 					msecs_to_jiffies(SSI_TIMEOUT_MS));
 
-	uniphier_spi_irq_disable(spi, SSI_IE_RCIE | SSI_IE_RORIE);
+	uniphier_spi_irq_disable(priv, SSI_IE_RCIE | SSI_IE_RORIE);
 
 	if (!time_left) {
 		dev_err(dev, "transfer timeout.\n");
@@ -395,6 +529,7 @@ static int uniphier_spi_transfer_one(struct spi_master *master,
 {
 	struct uniphier_spi_priv *priv = spi_master_get_devdata(master);
 	unsigned long threshold;
+	bool use_dma;
 
 	/* Terminate and return success for 0 byte length transfer */
 	if (!t->len)
@@ -402,6 +537,10 @@ static int uniphier_spi_transfer_one(struct spi_master *master,
 
 	uniphier_spi_setup_transfer(spi, t);
 
+	use_dma = master->can_dma ? master->can_dma(master, spi, t) : false;
+	if (use_dma)
+		return uniphier_spi_transfer_one_dma(master, spi, t);
+
 	/*
 	 * If the transfer operation will take longer than
 	 * SSI_POLL_TIMEOUT_US, it should use irq.
@@ -432,6 +571,32 @@ static int uniphier_spi_unprepare_transfer_hardware(struct spi_master *master)
 	return 0;
 }
 
+static void uniphier_spi_handle_err(struct spi_master *master,
+				    struct spi_message *msg)
+{
+	struct uniphier_spi_priv *priv = spi_master_get_devdata(master);
+	u32 val;
+
+	/* stop running spi transfer */
+	writel(0, priv->base + SSI_CTL);
+
+	/* reset FIFOs */
+	val = SSI_FC_TXFFL | SSI_FC_RXFFL;
+	writel(val, priv->base + SSI_FC);
+
+	uniphier_spi_irq_disable(priv, SSI_IE_ALL_MASK);
+
+	if (atomic_read(&priv->dma_busy) & SSI_DMA_TX_BUSY) {
+		dmaengine_terminate_async(master->dma_tx);
+		atomic_andnot(SSI_DMA_TX_BUSY, &priv->dma_busy);
+	}
+
+	if (atomic_read(&priv->dma_busy) & SSI_DMA_RX_BUSY) {
+		dmaengine_terminate_async(master->dma_rx);
+		atomic_andnot(SSI_DMA_RX_BUSY, &priv->dma_busy);
+	}
+}
+
 static irqreturn_t uniphier_spi_handler(int irq, void *dev_id)
 {
 	struct uniphier_spi_priv *priv = dev_id;
@@ -477,6 +642,9 @@ static int uniphier_spi_probe(struct platform_device *pdev)
 {
 	struct uniphier_spi_priv *priv;
 	struct spi_master *master;
+	struct resource *res;
+	struct dma_slave_caps caps;
+	u32 dma_tx_burst = 0, dma_rx_burst = 0;
 	unsigned long clk_rate;
 	int irq;
 	int ret;
@@ -491,11 +659,13 @@ static int uniphier_spi_probe(struct platform_device *pdev)
 	priv->master = master;
 	priv->is_save_param = false;
 
-	priv->base = devm_platform_ioremap_resource(pdev, 0);
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	priv->base = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(priv->base)) {
 		ret = PTR_ERR(priv->base);
 		goto out_master_put;
 	}
+	priv->base_dma_addr = res->start;
 
 	priv->clk = devm_clk_get(&pdev->dev, NULL);
 	if (IS_ERR(priv->clk)) {
@@ -538,7 +708,45 @@ static int uniphier_spi_probe(struct platform_device *pdev)
 				= uniphier_spi_prepare_transfer_hardware;
 	master->unprepare_transfer_hardware
 				= uniphier_spi_unprepare_transfer_hardware;
+	master->handle_err = uniphier_spi_handle_err;
+	master->can_dma = uniphier_spi_can_dma;
+
 	master->num_chipselect = 1;
+	master->flags = SPI_CONTROLLER_MUST_RX | SPI_CONTROLLER_MUST_TX;
+
+	master->dma_tx = dma_request_chan(&pdev->dev, "tx");
+	if (IS_ERR_OR_NULL(master->dma_tx)) {
+		if (PTR_ERR(master->dma_tx) == -EPROBE_DEFER)
+			goto out_disable_clk;
+		master->dma_tx = NULL;
+		dma_tx_burst = INT_MAX;
+	} else {
+		ret = dma_get_slave_caps(master->dma_tx, &caps);
+		if (ret) {
+			dev_err(&pdev->dev, "failed to get TX DMA capacities: %d\n",
+				ret);
+			goto out_disable_clk;
+		}
+		dma_tx_burst = caps.max_burst;
+	}
+
+	master->dma_rx = dma_request_chan(&pdev->dev, "rx");
+	if (IS_ERR_OR_NULL(master->dma_rx)) {
+		if (PTR_ERR(master->dma_rx) == -EPROBE_DEFER)
+			goto out_disable_clk;
+		master->dma_rx = NULL;
+		dma_rx_burst = INT_MAX;
+	} else {
+		ret = dma_get_slave_caps(master->dma_rx, &caps);
+		if (ret) {
+			dev_err(&pdev->dev, "failed to get RX DMA capacities: %d\n",
+				ret);
+			goto out_disable_clk;
+		}
+		dma_rx_burst = caps.max_burst;
+	}
+
+	master->max_dma_len = min(dma_tx_burst, dma_rx_burst);
 
 	ret = devm_spi_register_master(&pdev->dev, master);
 	if (ret)
@@ -558,6 +766,11 @@ static int uniphier_spi_remove(struct platform_device *pdev)
 {
 	struct uniphier_spi_priv *priv = platform_get_drvdata(pdev);
 
+	if (priv->master->dma_tx)
+		dma_release_channel(priv->master->dma_tx);
+	if (priv->master->dma_rx)
+		dma_release_channel(priv->master->dma_rx);
+
 	clk_disable_unprepare(priv->clk);
 
 	return 0;

drivers/spi/spi.c

@@ -1674,6 +1674,13 @@ void spi_finalize_current_message(struct spi_controller *ctlr)
 		}
 	}
 
+	if (unlikely(ctlr->ptp_sts_supported)) {
+		list_for_each_entry(xfer, &mesg->transfers, transfer_list) {
+			WARN_ON_ONCE(xfer->ptp_sts && !xfer->timestamped_pre);
+			WARN_ON_ONCE(xfer->ptp_sts && !xfer->timestamped_post);
+		}
+	}
+
 	spi_unmap_msg(ctlr, mesg);
 
 	if (ctlr->cur_msg_prepared && ctlr->unprepare_message) {
@@ -2451,6 +2458,8 @@ static int spi_get_gpio_descs(struct spi_controller *ctlr)
 	int nb, i;
 	struct gpio_desc **cs;
 	struct device *dev = &ctlr->dev;
+	unsigned long native_cs_mask = 0;
+	unsigned int num_cs_gpios = 0;
 
 	nb = gpiod_count(dev, "cs");
 	ctlr->num_chipselect = max_t(int, nb, ctlr->num_chipselect);
@@ -2492,7 +2501,22 @@ static int spi_get_gpio_descs(struct spi_controller *ctlr)
 			if (!gpioname)
 				return -ENOMEM;
 			gpiod_set_consumer_name(cs[i], gpioname);
+			num_cs_gpios++;
+			continue;
 		}
+
+		if (ctlr->max_native_cs && i >= ctlr->max_native_cs) {
+			dev_err(dev, "Invalid native chip select %d\n", i);
+			return -EINVAL;
+		}
+		native_cs_mask |= BIT(i);
+	}
+
+	ctlr->unused_native_cs = ffz(native_cs_mask);
+	if (num_cs_gpios && ctlr->max_native_cs &&
+	    ctlr->unused_native_cs >= ctlr->max_native_cs) {
+		dev_err(dev, "No unused native chip select available\n");
+		return -EINVAL;
 	}
 
 	return 0;

include/linux/spi/spi.h

@@ -423,6 +423,12 @@ static inline void spi_unregister_driver(struct spi_driver *sdrv)
  *	GPIO descriptors rather than using global GPIO numbers grabbed by the
  *	driver. This will fill in @cs_gpiods and @cs_gpios should not be used,
  *	and SPI devices will have the cs_gpiod assigned rather than cs_gpio.
+ * @unused_native_cs: When cs_gpiods is used, spi_register_controller() will
+ *	fill in this field with the first unused native CS, to be used by SPI
+ *	controller drivers that need to drive a native CS when using GPIO CS.
+ * @max_native_cs: When cs_gpiods is used, and this field is filled in,
+ *	spi_register_controller() will validate all native CS (including the
+ *	unused native CS) against this value.
  * @statistics: statistics for the spi_controller
  * @dma_tx: DMA transmit channel
  * @dma_rx: DMA receive channel
@@ -624,6 +630,8 @@ struct spi_controller {
 	int			*cs_gpios;
 	struct gpio_desc	**cs_gpiods;
 	bool			use_gpio_descriptors;
+	u8			unused_native_cs;
+	u8			max_native_cs;
 
 	/* statistics */
 	struct spi_statistics	statistics;

include/linux/spi/spi_oc_tiny.h

@@ -6,16 +6,12 @@
  * struct tiny_spi_platform_data - platform data of the OpenCores tiny SPI
  * @freq:	input clock freq to the core.
  * @baudwidth:	baud rate divider width of the core.
- * @gpio_cs_count:	number of gpio pins used for chipselect.
- * @gpio_cs:	array of gpio pins used for chipselect.
  *
  * freq and baudwidth are used only if the divider is programmable.
  */
 struct tiny_spi_platform_data {
 	unsigned int freq;
 	unsigned int baudwidth;
-	unsigned int gpio_cs_count;
-	int *gpio_cs;
 };
 
 #endif /* _LINUX_SPI_SPI_OC_TINY_H */